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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 Reports Coverage  Rock County, WI · 1955–present Updated  Daily · last Aug 7, 2026

Latest NWS Hail Reports in Rock County

30 reports
Free hail report for your home →
0.75″ hail
Aug 7, 2026
11:50 PM UTC
Hail report for Rock County, WI
Rock County · 52,509 Homes in County
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
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.

Latest NWS Wind Reports in Rock County

30 reports
Free hail report + wind check →
UNK mph
Jul 3, 2026
5:02 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Reports of trees and powerlines down in Clinton. Time estimated from radar.
NWS Wind Report Location: Clinton, WI
UNK mph
Jul 3, 2026
5:00 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Reports of trees and powerlines down in Beloit. Time estimated from radar.
NWS Wind Report Location: Beloit, WI
UNK mph
Jul 2, 2026
11:25 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Storm chaser photo of large tree limb broken near Marshall Middle School in Janesville.
NWS Wind Report Location: 2 ENE Janesville, WI
60 mph
Jun 24, 2026
8:40 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: About 3 large limbs out of a healthy tree in Milton.
NWS Wind Report Location: Milton, WI
80 mph
Jun 10, 2026
7:35 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Trained spotter estimates 80 MPH wind gusts.
NWS Wind Report Location: 2 NW Milton, WI
UNK mph
Jun 10, 2026
7:22 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Large branch down. Picture from social media. Time est from radar.
NWS Wind Report Location: Milton, WI
UNK mph
Jun 10, 2026
7:15 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Large branch down. Picture from social media. Time est from radar.
NWS Wind Report Location: Edgerton, WI
85 mph
Jun 10, 2026
7:12 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: 85 MPH wind gust estimated from home instrumentation.
NWS Wind Report Location: 6 N Shirland, WI
80 mph
Jun 10, 2026
7:10 PM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
Wind Report Description: Trained spotter estimates 80 MPH wind gusts.
NWS Wind Report Location: 4 W Edgerton, WI
UNK mph
Apr 3, 2026
12:04 AM UTC
Wind report for Rock County, WI
Rock County · 52,509 Homes in County
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
UNK mph
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
76 mph
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
UNK mph
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
UNK mph
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
75 mph
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
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
UNK category
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
Showing 15 of 30
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

Report type
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Tornado

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Browse Cities with NWS Storm Reports in Rock County

NWS Storm Reports & Census Data

U.S. Census Data · County

Rock County, WI area census snapshot

People & households
Population163,944
Households66,652
Housing units70,694
Income
Median household income$74,390
$100k+ households43.4%
$150k+ households15.6%
Housing stock
Single-family detached52,509
Attached single-family3,041
Small multifamily7,796
Large multifamily5,557
Mobile homes1,780
Housing mix
Single-family share74.3%
Attached-home share4.3%
Multifamily share18.9%
Mobile-home share2.5%
Ownership & occupancy
Owner-occupied47,086
Renter-occupied19,566
Vacant units4,042
Home value & age
Median home value$215,900
Owner homes $300k+23.9%
Owner homes $500k+5.3%
Owner homes $750k+1.5%
Median year built1970
Older-home share65.8%
Vehicle context
Households with cars62,699
Free hail maps

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

Get a Remote Hail Inspection

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.

Frequently asked questions

for homeowners, buyers & sellers
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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