Heads up! Small hail spotted in these regions: Knoxville, TN • West Palm Beach, FL • Miami, FLATTENTION! Damaging hail detected. Hail tracking is now active for these regions: Winston, NC • Greensboro, NC • Rock Springs, WY • Provo, UT • Ogden, UT • Salt Lake City, UTHeads up! Small hail spotted in these regions: Knoxville, TN • West Palm Beach, FL • Miami, FLATTENTION! Damaging hail detected. Hail tracking is now active for these regions: Winston, NC • Greensboro, NC • Rock Springs, WY • Provo, UT • Ogden, UT • Salt Lake City, UT
Hi folks! Stay ahead of the storm with a 48-hour severe weather outlook, precise hail alerts, and live hail tracking. Access hail insights, historical hail maps, and detailed reports across 300+ regions for better planning and fewer "uh-oh" moments. Stay informed, stay safe, and stay protected - all completely free. Hi folks! Stay ahead of the storm with a 48-hour severe weather outlook, precise hail alerts, and live hail tracking. Access hail insights, historical hail maps, and detailed reports across 300+ regions for better planning and fewer "uh-oh" moments. Stay informed, stay safe, and stay protected - all completely free.
NOAA/NWS STORM PREDICTION CENTER REPORTS + U.S. CENSUS DATA
Hail, Wind & Tornado Reports in Rock County, WI
Public hail, wind, and tornado reports across Rock County, WI from May 28, 1955 through August 7, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.
Example: 53538 — search hail, wind and tornado public reports for any U.S. ZIP code
Hail Reports
167
Wind Reports
424
Tornado Reports
43
Max Hail Size
3.00″
Source NOAA SPC · NWS Local Storm ReportsCoverage Rock County, WI · 1955–presentUpdated Daily · last Aug 7, 2026
Hail Report Description: Broadcast MET reports estimated dime to penny size hail NE of Janesville_ with estimated 40-50 MPH wind gusts.
NWS Hail Report Location: 3 Ne Janesville, WI
1.25″hail
Jun 24, 2026 8:46 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 2 SE Milton, WI
1.75″hail
Apr 17, 2026 11:23 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Milton, WI
1.50″hail
Apr 17, 2026 11:12 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Time estimated from radar.
NWS Hail Report Location: 1 WSW Janesville, WI
1.00″hail
Apr 17, 2026 10:41 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 NNW Footville, WI
2.00″hail
Apr 17, 2026 10:29 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 E Beloit, WI
1.75″hail
Apr 17, 2026 10:16 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Relayed from Broadcast Media (WMTV Madison). Time estimated from radar.
NWS Hail Report Location: Beloit, WI
1.50″hail
Apr 2, 2026 11:22 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 2 NNE Janesville, WI
1.25″hail
Apr 2, 2026 11:19 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Hail at Mercy Hospital.
NWS Hail Report Location: 1 WNW Janesville, WI
1.00″hail
Mar 11, 2026 1:10 AM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: report relayed via social media.
NWS Hail Report Location: 1 SSW Beloit, WI
1.00″hail
Aug 16, 2025 7:40 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: Clinton, WI
1.50″hail
Aug 16, 2025 7:40 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Image of ping-pong ball sized hail from a social media report... with a quarter for scale.
NWS Hail Report Location: 1 N Clinton, WI
1.00″hail
Aug 16, 2025 7:25 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: 3 NE Janesville, WI
1.00″hail
Aug 16, 2025 7:22 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Public Facebook report via video of many hailstones shredding leaves off a backyard tree; size estimated. Time estimated by radar.
NWS Hail Report Location: 1 NNW Janesville, WI
1.00″hail
Aug 16, 2025 7:21 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: 3 SW Janesville, WI
1.00″hail
Aug 16, 2025 7:20 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Report from mPING: Quarter (1.00 in.).
NWS Hail Report Location: 2 NW Janesville, WI
1.50″hail
Aug 16, 2025 7:20 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Social media report from local storm chaser of the size of ping pong balls on the west side of Janesville. Time estimated from radar.
NWS Hail Report Location: 2 W Janesville, WI
1.75″hail
Apr 18, 2025 12:15 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1 SE Edgerton, WI
2.00″hail
Apr 18, 2025 12:14 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 E Edgerton, WI
1.75″hail
Apr 18, 2025 12:11 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Relayed by relative of NWS Employee... with photo.
NWS Hail Report Location: 3 E Edgerton, WI
1.75″hail
Apr 18, 2025 12:10 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Golf ball size hail. Some even larger. Some tree damage and car dents.
NWS Hail Report Location: 3 E Edgerton, WI
2.75″hail
Apr 18, 2025 12:10 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Edgerton, WI
2.50″hail
Apr 18, 2025 12:08 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Edgerton, WI
1.75″hail
Apr 18, 2025 12:05 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Evansville, WI
2.75″hail
Apr 18, 2025 12:02 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 W Edgerton, WI
2.00″hail
Apr 18, 2025 12:00 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1 E Evansville, WI
2.75″hail
Apr 18, 2025 12:00 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: Photo sent by relative on NWS employee.
NWS Hail Report Location: 1 W Evansville, WI
2.00″hail
Apr 18, 2025 11:58 AM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Evansville, WI
1.25″hail
Jun 26, 2024 12:55 AM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: At least 1 stone upward of half dollar size.
NWS Hail Report Location: 2 NE Janesville, WI
1.00″hail
Jun 26, 2024 12:55 AM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 S Milton, WI
Showing 15 of 30
Hail Damage Risk for Your Home+
Hail reports describe hail by diameter, often comparing stone size to familiar objects like peas, quarters, golf balls, and softballs. Use this guide as a starting point for possible hail damage to your roof, siding, gutters, vents, windows, and exterior. Actual hail damage depends on hail hardness, density, wind speed, impact angle, roof age, shingle condition, roof pitch, roofing material, installation quality, and prior storm damage.
Pea
0.25″
Low
Usually too small to cause hail damage to most sound asphalt roofs, siding, or gutters.
Mothball
0.50″
Sub-Severe Watch
Below the NWS severe-hail threshold, but not always harmless. Repeated small hail can scuff surfaces, wear aging shingles, and loosen protective granules over time.
Penny
0.75″
Minor / Watch
Below the NWS severe-hail threshold, but roof hail damage is still possible on older, brittle, poorly installed, or previously damaged shingles. May also mark screens, vents, gutters, and soft metal.
Nickel
0.88″
Minor / Watch
Still below the severe-hail threshold, but large enough to leave visible marks on soft metal and add wear to older or hail-weakened roof shingles.
Quarter
1.00″
Watch
The NWS severe-hail threshold. Quarter-size hail can bruise shingles, dent soft metal, and create roof hail damage worth checking.
Half Dollar
1.25″
Watch
More likely to dent gutters, vents, flashing, and siding. Hail damage risk rises quickly on older roofs or hail-weakened shingles.
Ping Pong / Walnut
1.50″
Likely
Hail damage becomes more likely, including bruised shingles, granule loss, dented siding, and damaged roof vents.
Golf Ball
1.75″
Likely
Often causes roof hail damage, cracked shingles, dented gutters, damaged flashing, and siding impacts. A roof inspection is recommended.
Hen Egg
2.00″
Serious
Can crack or puncture shingles, expose mat, dent siding, and cause widespread hail damage across the roof and exterior.
Tennis Ball
2.50″
Serious
Can cause heavy roof hail damage, punctured siding, broken skylights, damaged vents, and widespread exterior damage.
Baseball
2.75″
Major
Major hail damage is likely, including severe roof impacts, damaged siding, broken windows, and possible major roof repairs.
Tea Cup / Large Apple
3.00″
Major
Can cause heavy hail damage across the roof, siding, gutters, windows, and exterior. Significant repairs are often needed.
Softball
4.00″
Extreme
Destructive hail damage. Can severely damage roofing materials, siding, windows, gutters, vents, vehicles, and exterior surfaces.
Grapefruit
4.50″
Extreme
Catastrophic hail damage risk for roofs, windows, vehicles, siding, gutters, and exterior surfaces.
Source: NOAA / National Weather Service hail size references are used for hail-size comparisons and the 1.00″ severe-hail threshold. Damage descriptions are general homeowner guidance, not official NOAA/NWS damage ratings. Sub-severe hail under 1.00″ is below the severe threshold, but that does not mean “no roof damage.” Penny- to nickel-size hail can still contribute to granule loss, cosmetic surface marks, and added wear, especially on older, brittle, poorly installed, or previously damaged roofs.
Wind Report Description: Tree down by Gibbs Lake reported by Rock County Dispatchers. Time estimated by radar.
NWS Wind Report Location: 6 E Evansville, WI
UNKmph
Aug 16, 2025 7:20 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Dispatch reports tree damage across Janesville.
NWS Wind Report Location: Janesville, WI
76mph
Jul 11, 2025 11:36 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: 1 S Evansville, WI
UNKmph
Jul 11, 2025 11:31 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Trees down and across roadway. Time estimated from radar.
NWS Wind Report Location: 4 ENE Albany, WI
UNKmph
Jun 26, 2025 12:22 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Dispatch center reports multiple trees and power lines down in La Prairie township. Time estimated from radar.
NWS Wind Report Location: 4 W Avalon, WI
75mph
Mar 15, 2025 4:50 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Mesonet station WI088 I-39 90 At Sth 59 Newville.
NWS Wind Report Location: 2 E Edgerton, WI
75mph
Mar 15, 2025 4:50 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Mesonet station WI089 I-39 90 At Sth 26.
NWS Wind Report Location: 3 NNE Janesville, WI
UNKmph
Mar 15, 2025 4:45 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Snapped trees.
NWS Wind Report Location: 1 NW Beloit, WI
UNKmph
Mar 15, 2025 4:45 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Multiple trees on trailers.
NWS Wind Report Location: 1 NW Beloit, WI
UNKmph
Mar 15, 2025 4:42 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Roof reported blown off.
NWS Wind Report Location: Janesville, WI
65mph
Mar 15, 2025 4:39 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Tree damage on the southwest side of Janesville.
NWS Wind Report Location: 2 SW Janesville, WI
65mph
Mar 15, 2025 4:27 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Trees down with power lines down.
NWS Wind Report Location: 3 SE Brodhead, WI
65mph
Mar 15, 2025 4:25 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Trees down in Town of Union.
NWS Wind Report Location: 3 N Evansville, WI
70mph
Jul 19, 2024 12:42 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Tree damage observed along Weary Rd south of Hwy 14 and west of Tuttle Rd. One horse fence had some boards blown off of it.
NWS Wind Report Location: 4 ESE Evansville, WI
UNKmph
Jul 16, 2024 1:20 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Law enforcement reports scattered trees down across Rock County.
NWS Wind Report Location: 2 WSW Janesville, WI
84mph
Jul 16, 2024 12:46 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Measured via privately owned anemometer.
NWS Wind Report Location: Footville, WI
63mph
Jul 16, 2024 12:40 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Measured via privately owned anemometer.
NWS Wind Report Location: 1 W Evansville, WI
UNKmph
Jul 15, 2024 2:14 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Report of small broken tree limbs relayed via mPING. Time estimated via radar data.
NWS Wind Report Location: 4 SW Milton, WI
UNKmph
Jul 15, 2024 1:45 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Reports of downed trees relayed via mPING. Time estimated via radar.
NWS Wind Report Location: 1 NE Janesville, WI
UNKmph
Jul 15, 2024 1:45 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Report of broken tree limbs relayed via mPING. Time estimated from radar data.
NWS Wind Report Location: 3 NE Janesville, WI
UNKmph
Jul 15, 2024 1:45 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Numerous reports of trees and powerlines down in the Janesville area.
NWS Wind Report Location: 1 NNW Janesville, WI
Showing 15 of 30
Wind Damage Risk for Your Home+
Storm reports list thunderstorm wind gusts in mph. The NWS marks storms as severe at 58+ mph, but wind damage to your home depends on roof age, shingle condition, installation, exposure, nearby trees, and prior hail or wind damage.
Below Severe
Under 58 mph
Minor
Usually little damage to a sound roof, but loose shingles, flashing, or debris may shift.
Severe
58–74 mph
Watch
Can loosen shingles, lift flashing, break limbs, and damage gutters, siding, fences, or trim.
Damaging
75–90 mph
Serious
Can peel shingles, damage vents, tear siding, rip gutters, and expose weak roof areas.
Extreme
90+ mph
Major
Can cause major roof covering loss, tree damage, broken windows, and structural damage.
Source: NOAA / National Weather Service storm reports. Gusts may be measured or estimated; actual wind damage varies by roof condition, exposure, and prior hail or wind damage.
Latest NWS Tornado Reports in Rock County
30 reports
UNKcategory
Apr 17, 2026 11:09 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: Corrects previous tornado report from 5 ENE Avalon. Snapped and uprooted trees... damage to houses... and sheet metal wrapped around trees near Emerald Grove. Time estimated from radar.
NWS Tornado Report Location: 1 N Avalon, WI
UNKcategory
Apr 17, 2026 11:09 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: Snapped and uprooted trees... damage to houses... and sheet metal wrapped around trees near Emerald Grove. Time estimated from radar.
NWS Tornado Report Location: 5 ENE Avalon, WI
UNKcategory
Apr 17, 2026 11:05 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: NWS Damage Survey concludes an EF-1 tornado occurred with estimated peak winds of 100 mph. The tornado started southwest of Emerald Grove and moved northeastward... taking the roof off of a farm outbuilding... buckling garage doors... and snapping multiple trees before ending near Lake Lorraine. Time estimated from radar.
NWS Tornado Report Location: 4 SE Janesville, WI
UNKcategory
Apr 17, 2026 11:05 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: Multiple reports of a tornado on the ground.
NWS Tornado Report Location: 4 SE Janesville, WI
UNKcategory
Jul 19, 2024 12:26 AM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: EF-0 Tornado... estimated peak wind of 70mph. Video of the tornado was shared from the southwest side of Evansville with tree and field damage confirmed via two storm chasers. Damage path evident via satellite as well. Path may be adjusted as drone footage is reviewed.
NWS Tornado Report Location: 3 SW Evansville, WI
UNKcategory
Jun 23, 2024 12:42 AM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: NWS Storm Survey: EF-2 tornado with estimated peak wind speeds of 115mph. Estimated to be on the ground from 7:42pm-7:53pm. Most of the damage was at EF-1 level but a few spots on the southern side of Janesville had higher damage.
NWS Tornado Report Location: 6 ESE Footville, WI
UNKcategory
May 26, 2024 10:26 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: Lots of damage in Milton and specifically mentioned trees on houses.
NWS Tornado Report Location: Milton, WI
UNKcategory
May 26, 2024 10:15 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: A NWS storm survey found that an EF-0 rated tornado... with an estimated peak wind speed of 80 MPH... developed east of Janesville and tracked to the north-northeast into Jefferson County... ending in the vicinity of US Highway 12 between Fort Atkinson and Whitewater. The tornado damage track was approximately 15 miles long.
NWS Tornado Report Location: 4 ENE Janesville, WI
UNKcategory
May 26, 2024 10:00 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: NWS Survey confirms an EF0 tornado with peak wind speeds of 80 MPH touching down 5 ENE of the community of Footville to Milton. Touchdown time estimated via radar data. Path length 12.23 miles.
NWS Tornado Report Location: 5 ENE Footville, WI
UNKcategory
Feb 8, 2024 11:46 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: Damage surveys confirm an EF-2 tornado. This tornado touched down southeast of Evansville at 5:46 PM CDT and continued on a northeast track to near Lake Koshkonong... ending at approximately 6:17 PM CDT.
NWS Tornado Report Location: 3 E Evansville, WI
UNKcategory
Jul 13, 2023 11:13 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: EF-0 near Emerald Grove/Avalon in Rock County near CeCelias Golf Course. Video and photographic evidence of rotation making it down from a funnel cloud extending down from the thunderstorm. The rotation went through a tree line and caused some very minor tree damage. Estimated 60mph winds... 25 yard width.
NWS Tornado Report Location: 1 NNW Avalon, WI
UNKcategory
Apr 2, 2023 12:46 AM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: EF-0 TORNADO. ESTIMATED MAX WIND SPEED: 80MPH. PATH LENGTH: 3.8 MILES. PATH WIDTH: 100 YARDS. TORNADO STARTED IN THE CENTER OF BELOIT IN THE MERRILL PARK AREA. THE TORNADO UPROOTED NUMEROUS TREES ALONG ITS PATH THROUGH THE EASTERN SIDE OF THE CITY (TURTLE AREA). THE PATH THEN WENT EAST AND APPEARS TO HAVE CROSSED I-39 BEFORE ENDING IN A FIELD.
NWS Tornado Report Location: Beloit, WI
UNKcategory
May 25, 2022 11:50 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: VIDEO SHARED VIA SOCIAL MEDIA CONFIRMS TORNADO AT PADDOCK AND FINLEY ROADS. TIME ESTIMATED FROM RADAR.
NWS Tornado Report Location: 6 WNW Beloit, WI
UNKcategory
May 25, 2022 11:49 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: EF-0 TORNADO WITH ESTIMATED PEAK WIND OF 75 MPH.
NWS Tornado Report Location: 6 WNW Beloit, WI
UNKcategory
Aug 9, 2021 8:02 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: FIRE DEPT REPORTS A TOUCH DOWN NEAR THE INTERSECTION OF SOUTH CARVER ROCK ROAD AND EAST CREEK ROAD.
NWS Tornado Report Location: 3 SE Avalon, WI
UNKcategory
Aug 9, 2021 7:58 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: MULTIPLE PUBLIC REPORTS OF A TORNADO WITH INTERMITTENT TOUCH DOWNS JUST NORTH OF I-43 ALONG WI WHY 140.
NWS Tornado Report Location: 1 N Clinton, WI
UNKcategory
May 23, 2020 10:26 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: 4 SE Janesville, WI
UNKcategory
May 23, 2020 10:05 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: BRIEF TOUCHDOWN 4 MILES WEST OF CLINTON.
NWS Tornado Report Location: 4 W Clinton, WI
UNKcategory
May 23, 2020 10:00 PM UTC
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: MULTIPLE REPORTS BY STATE PATROL OF AN ONGOING TORNADO NEAR THE I-90/I-43 INTERCHANGE.
NWS Tornado Report Location: 2 E Beloit, WI
EF1category
Jul 18, 2015 1:40 PM CST-6
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: Three old barns were mostly destroyed. Fields of corn partially blown over. Large trees snapped.
NWS Tornado Report Location: .71 NNE Johnstown, WI
EF0category
Sep 21, 2010 3:00 PM CST-6
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: An isolated thunderstorm cell ahead of a broken line of strong to severe thunderstorms, generated a brief, weak tornado. A damage survey conducted by Midwest Severe Storm Tracking and Response Center verified this brief, EF0 tornado around 4.2 miles southeast of Southern Wisconsin Regional Airport (KJVL). The tornado path began just southeast of the intersection of CTH G and Walton Lane, and moved east-northeast less than 1/2 mile before dissipating east of Franklin Street. The tornado broke off 6 to 8 inch tree limbs and twisted and broke off shrubs at the ground. It also bent, and then knocked over, a 20-foot antenna that had been stabilized by guy wires. The EF rating was determined by DI27 (TH) DOD2, with estimated wind speeds of 70 to 75 mph. The exact start location is Lat. 42.56200 Lon. -89.01098. The exact end location is Lat 42.56322 Lon -89.00297.|Average path width was 15 yards. The damage amount was estimated.
NWS Tornado Report Location: .95 NNE Prairie Airport, WI
EF0category
Jun 23, 2009 7:09 PM CST-6
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: An isolated thunderstorm cell quickly developed and spun up a weak landspout-type tornado that was spotted by the Janesville airport observer, trained spotters and the public. It began over the southwest part of Clear Lake and moved east-southeast and ended just east of STH 59. A screen porch was ripped off a mobile home trailer and some trees just south and southeast of Clear Lake were uprooted or damaged. The estimated max wind speeds of were 70-75 mph. Starting and ending location of 42.79879/-88.98358 and 42.79540/-88.96750. The compass bearing was 117 degrees. The average path width was about 15 yds. DI#3, DOD2.
NWS Tornado Report Location: 2.11 NNW Milton Jct, WI
F0category
Aug 26, 2006 5:33 PM CST
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: A brief tornado spun up 1.4 miles due south of Shopiere, or about 3.8 miles west-southwest of Clinton, very near the intersection of Hart Road and Butterfly Road. It resulted in some minor corn crop damage and tree damage, and was observed by 3 spotters. This very weak tornado spun up on a wind shift boundary that extended from near Racine to near Beloit. Showers and isolated thunderstorms developed along this boundary and produced several funnel clouds, and locally heavy rains. The tornado apparently developed from from the ground up since there wasn't any mesocyclone evidence on the WSR-88D Doppler radar. Atmospheric wind shear profiles were not supportive of rotating updrafts in thunderstorms.
NWS Tornado Report Location: 1 S Shopiere, WI
F1category
Jul 25, 2005 3:07 PM CST
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: A tornado spun up at 1507CST about 4 miles north-northeast of Milton (Rock Co.). about 1/4 mile north of the intersection of Vickerman Rd. and Godfrey Rd. It traveled east-southeast for 2 miles and dissipated just northwest of the intersection of McCord Rd. and Salisbury Drive. On Godfrey Rd it destroyed one large barn, severely damaged another barn, destroyed a shed, and inflicted minor damage to a home. Otherwise many large trees were uprooted or shredded, and a couple power lines were ripped.
NWS Tornado Report Location: 4 NNE Milton, WI
F1category
May 30, 2003 5:04 PM CST
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: This tornado, which spun up in southeast Green County, tracked east-southeast into extreme southwest Rock County at a point 2.3 miles southwest of Avon, where Douglas Road intersects County Trunk T. In Rock County, this tornado blew over a small grain bin, blew a gravity bin off its foundation, flipped and twisted a large field sprinkler system, lightly damaged a home's siding and roof, and ripped up some yard fencing. It is estimated that maximum wind were about 78 to 86 knots (90 to 100 mph). It dissipated in the wooded bottom lands of the Sugar River southeast of Avon, about three-fourths of a mile north of the Illinois state border.
NWS Tornado Report Location: 2 SW Avon, WI
F0category
Aug 5, 2000 2:43 PM CST
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: Narrative is incorporated in discussion of August 5th storms below.
NWS Tornado Report Location: 2 SW Evansville, WI
F2category
Jun 25, 1998 6:05 PM CST
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: WNW Leyden, WI
F1category
May 22, 1991 2:33 PM CDT
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, WI
F2category
Mar 27, 1991 1:55 PM CST
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, WI
F2category
May 8, 1988 4:30 PM CST
Tornado report for Rock County, WI
Rock County · 52,509 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, WI
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Tornado Damage Risk for Your Home+
After a tornado, the National Weather Service assigns an EF rating from EF0 to EF5 based on surveyed damage. The rating estimates wind speed from what the tornado damaged, so actual damage can vary by construction quality, roof age, garage doors, windows, trees, debris, and how close the home was to the tornado path.
EF0
65–85 mph
Light
Can peel shingles, damage gutters or siding, break tree limbs, and toss loose outdoor items.
EF1
86–110 mph
Moderate
Can strip roof covering, damage exterior doors, break windows, snap trees, and cause heavier siding or gutter damage.
EF2
111–135 mph
Serious
Can tear off large sections of roofing, break or uproot trees, destroy weaker structures, and cause major exterior damage.
EF3–EF5
136+ mph
Severe
Can remove roofs and walls, destroy large portions of homes, toss vehicles, and cause severe to total destruction near the path.
Source: NOAA / National Weather Service. EF ratings are assigned after a post-storm damage survey and are based on observed damage, not a direct measurement at every home.
NWS Hail, Wind and Tornado Reports in Rock County on the Interactive Map
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This snapshot is for local area context only and describes the selected state, county, city, or ZIP area — not a specific home or property. For ZIP-level estimated hail impact, use Free Hail Maps to generate a hail report with key impact details for that ZIP.
Top ZIP Codes with NWS Storm Reports in Rock County
Not sure if hail may have affected your home in Rock County? Ask a local pro for a Remote Hail Inspection. They can review hail activity for your property and help you decide whether an in-person roof or exterior inspection makes sense.
How many hail, wind, and tornado reports does Rock County have on record?
Our records show 167 hail, 424 wind, and 43 tornado reports in Rock County, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 7, 2026.
What is the largest hail ever reported in Rock County?
The largest hail size in these storm-report records in Rock County is 3.00″. It was reported near Orfordville, WI on June 4, 1975.
A storm report showed up near my home in Rock County — does that mean my roof is damaged?
Not necessarily. A storm report only means hail, wind, or a tornado was observed nearby; it does not confirm damage at any specific address, and conditions change from block to block. Check an address-level hail report first, and if it looks significant, find a local pro that serves Rock County and ask about a Remote Hail Inspection before anyone climbs on the roof.
I am buying a home in Rock County — why should I look at its storm history?
Recent hail or wind can leave a roof or exterior with damage that is easy to miss during a walkthrough, and a recent roof replacement is sometimes an insurance job after a storm. Reviewing the storm history for a Rock County address before closing helps you ask informed questions about roof age, past repairs, and any prior claims.
I am selling a home in Rock County — how does this help me?
Knowing the storm history for your address lets you answer buyer questions with confidence, document repairs you have already made, and decide whether a pre-listing roof check is worthwhile. A clear hail history removes a common sticking point during negotiations.
How do I check hail history for a specific Rock County address?
Use the address search to pull a free address-level hail report for any property in Rock County — no phone number or email required. It shows recent hail activity for that address so you know whether a closer roof or exterior review makes sense.
Where does this storm report data come from, and what are its limits?
Storm reports on this page are public reports from storm events across Rock County, WI, sourced from NOAA SPC and NWS Local Storm Reports. They show where hail, wind, or tornado activity was reported in Rock County, but they do not confirm damage at any specific property. Report locations, sizes, and times may be approximate and can vary from what an individual home experienced. For property-specific hail history, use an address-level hail report or contact a participating local professional for a remote hail inspection. Pros inclusion is not an endorsement, and contacting a professional does not confirm damage at any property.
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