Heads up! Small hail spotted in these regions: Sebring, FL • North Port, FL • Champaign, IL • Corpus Christi, TX • Knoxville, TN • Fort Myers, FL • Mattoon, IL • West Palm Beach, FL • Miami, FL      ATTENTION! Damaging hail detected. Hail tracking is now active for these regions: Louisville, KY • Winston, NC • Greensboro, NC • Rock Springs, WY • Provo, UT • Ogden, UT • Salt Lake City, UT      
HailGeeks
NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports on July 20, 2011

Public hail, wind, and tornado reports across the United States on July 20, 2011 from July 20, 2011 through July 20, 2011, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Pick any date to see hail, wind and tornado public reports for that day — e.g. September 18, 2026.
Hail Reports
11
Wind Reports
64
Tornado Reports
1
Max Hail Size
1.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · July 20, 2011 · 2011–present Updated  Daily · last Jul 20, 2011

NWS Hail Reports on July 20, 2011

11 reports
Free hail report for your home →
0.88″ hail
Jul 20, 2011
6:20 PM EST-5
Hail report for July 20, 2011
Butler County · 112,735 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Oxford, OH
0.75″ hail
Jul 20, 2011
4:40 PM EST-5
Hail report for July 20, 2011
Campbell County · 26,667 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N California, KY
1.00″ hail
Jul 20, 2011
4:35 PM EST-5
Hail report for July 20, 2011
Campbell County · 26,667 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 ENE Alexandria, KY
1.00″ hail
Jul 20, 2011
4:28 PM EST-5
Hail report for July 20, 2011
Clermont County · 62,095 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N New Richmond, OH
1.75″ hail
Jul 20, 2011
4:55 AM CST-6
Hail report for July 20, 2011
Pembina County · 2,897 Homes in County
Hail Report Description: Hail fell in various sizes from dimes to golf balls.
NWS Hail Report Location: 5.02 W St Thomas, ND
1.75″ hail
Jul 20, 2011
5:49 AM EST-5
Hail report for July 20, 2011
Houghton County · 14,442 Homes in County
Hail Report Description: Most of the hail observed was between dime and quarter-sized, but a few stones were the size of golf balls. In addition...wind gusts were estimated around 40 mph.
NWS Hail Report Location: 2.34 NW Jacobsville, MI
1.25″ hail
Jul 20, 2011
4:40 AM CST-6
Hail report for July 20, 2011
Ramsey County · 3,533 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1.38 N Lawton, ND
1.00″ hail
Jul 20, 2011
4:17 AM CST-6
Hail report for July 20, 2011
McLean County · 4,726 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Max, ND
0.75″ hail
Jul 20, 2011
5:05 AM EST-5
Hail report for July 20, 2011
Houghton County · 14,442 Homes in County
Hail Report Description: Pea to penny-sized hail was observed near Toivola.
NWS Hail Report Location: 3.83 W Toivola, MI
1.00″ hail
Jul 20, 2011
4:00 AM CST-6
Hail report for July 20, 2011
Ramsey County · 3,533 Homes in County
Hail Report Description: An observer also measured 1.51 inches of rain.
NWS Hail Report Location: 3.59 NE Garske, ND
1.00″ hail
Jul 20, 2011
3:15 AM CST-6
Hail report for July 20, 2011
Walsh County · 3,971 Homes in County
Hail Report Description: Hail fell in various sizes, with one inch diameter being the largest.
NWS Hail Report Location: 2.27 SSE Lankin, ND
Showing 11 of 11
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.

NWS Wind Reports on July 20, 2011

64 reports
Free hail report + wind check →
60 mph
Jul 20, 2011
8:07 PM EST-5
Wind report for July 20, 2011
Aroostook County · 28,443 Homes in County
Wind Report Description: A tree was toppled on to power lines by wind gusts estimated at 60 mph.
NWS Wind Report Location: N Linneus, ME
60 mph
Jul 20, 2011
7:48 PM EST-5
Wind report for July 20, 2011
Aroostook County · 28,443 Homes in County
Wind Report Description: A tree was toppled by wind gusts estimated at 60 mph.
NWS Wind Report Location: N Knowles Corner, ME
63 mph
Jul 20, 2011
6:12 PM CST-6
Wind report for July 20, 2011
Blount County · 17,350 Homes in County
Wind Report Description: A barn had a large portion of its tin roof removed. Several trees were also blown down in Oneonta.
NWS Wind Report Location: .69 S Oneonta, AL
58 mph
Jul 20, 2011
6:10 PM EST-5
Wind report for July 20, 2011
Darke County · 18,667 Homes in County
Wind Report Description: A roof was blown off of a barn due to damaging thunderstorm winds.
NWS Wind Report Location: 6 WSW New Madison, OH
60 mph
Jul 20, 2011
4:10 PM MST-7
Wind report for July 20, 2011
Cochise County · 39,175 Homes in County
Wind Report Description: Thunderstorm winds blew off the roof of an industrial building in Sierra Vista. Part of the roof knocked over a brick wall. Part of one wall of the building also collapsed. Several trees and branches were also downed in the same area.
NWS Wind Report Location: 4.85 WSW Lewis Spgs, AZ
90 mph
Jul 20, 2011
5:22 PM EST-5
Wind report for July 20, 2011
Darke County · 18,667 Homes in County
Wind Report Description: Barns were damaged extensively. An agricultural hopper was moved approximately 1000 feet. Large trees and limbs were snapped in several locations. Corn fields were flattened. Vegetation was removed from a 30 foot area in a farm field. These occurrences were due to damaging thunderstorm winds. The wind speed was estimated by the damage assessment.
NWS Wind Report Location: N Union City, OH
60 mph
Jul 20, 2011
5:10 PM EST-5
Wind report for July 20, 2011
Henry County · 17,313 Homes in County
Wind Report Description: An 18 to 24-inch diameter tree was downed across County Road 375 West due to damaging thunderstorm wind gusts. Also, dime to quarter sized hail was observed.
NWS Wind Report Location: 2.11 NW Spiceland, IN
58 mph
Jul 20, 2011
4:35 PM EST-5
Wind report for July 20, 2011
Hocking County · 9,506 Homes in County
Wind Report Description: Trees and wires were reported down in several locations due to damaging thunderstorm winds.
NWS Wind Report Location: 3 WSW Gibisonville, OH
58 mph
Jul 20, 2011
4:00 PM EST-5
Wind report for July 20, 2011
Bertie County · 5,974 Homes in County
Wind Report Description: Two large trees were downed on Route 305.
NWS Wind Report Location: 2.66 SE Burden, NC
58 mph
Jul 20, 2011
3:43 PM EST-5
Wind report for July 20, 2011
Fairfield County · 49,669 Homes in County
Wind Report Description: Numerous trees were reported down due to damaging thunderstorm winds.
NWS Wind Report Location: 4 E Lithopolis, OH
64 mph
Jul 20, 2011
3:23 PM EST-5
Wind report for July 20, 2011
Lawrence County · 16,047 Homes in County
Wind Report Description: Trees and utility lines were blown down in Oolitic due to damaging thunderstorm wind gusts. One tree crashed into a home.
NWS Wind Report Location: .32 S O Olitic, IN
64 mph
Jul 20, 2011
3:15 PM EST-5
Wind report for July 20, 2011
Lawrence County · 16,047 Homes in County
Wind Report Description: Dry outflow from a thunderstorm blew off a screen door and blew down a couple of utility poles.
NWS Wind Report Location: 1.75 NW Avoca, IN
61 mph
Jul 20, 2011
3:03 PM EST-5
Wind report for July 20, 2011
Jefferson County · 229,279 Homes in County
Wind Report Description: A 61 mph wind gust was measured at the Louisville Airport.
NWS Wind Report Location: N (Sdf)Staniford Fld L, KY
58 mph
Jul 20, 2011
3:00 PM EST-5
Wind report for July 20, 2011
Pasquotank County · 12,161 Homes in County
Wind Report Description: Tree was downed across Highway 17 near Morgans Corner.
NWS Wind Report Location: .89 SE Morgans Corners, NC
58 mph
Jul 20, 2011
2:05 PM EST-5
Wind report for July 20, 2011
Accomack County · 16,413 Homes in County
Wind Report Description: Power lines were downed along Highway 17 just east of the Dismal Swamp.
NWS Wind Report Location: 70.64 SSW Davis Wharf, VA
Showing 15 of 64
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.

NWS Tornado Reports on July 20, 2011

1 reports
EF1 category
Jul 20, 2011
5:50 AM CST-6
Tornado report for July 20, 2011
Pierce County · 1,710 Homes in County
Tornado Report Description: A brief tornado touched down five miles south of Rugby on the leading edge of a linear severe thunderstorm. This tornado was within a larger area of straight line thunderstorm winds which also caused damage. Several buildings sustained damage or were destroyed by this tornado, along with trees, and three power poles were snapped along North Dakota Highway 3 where the tornado crossed. A semi truck was picked up along Highway 3 and thrown into the ditch. There were no injuries or deaths reported with this tornado. The tornado damage corresponded to EF1 on the Enhanced Fujita Scale. From that it was determined that wind speeds with this tornado were on the order of 100 miles per hour.
NWS Tornado Report Location: 4.92 S Rugby, ND
Showing 1 of 1
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 on July 20, 2011 on the Interactive Map

Report type
Hail
Wind
Tornado

Get a Remote Hail Inspection

Not sure if hail may have affected your home on July 20, 2011? 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 storm reports were recorded on July 20, 2011?

Our records show 11 hail, 64 wind, and 1 tornado reports on July 20, 2011, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on July 20, 2011.

What was the largest hail reported on July 20, 2011?

The largest hail size in these storm-report records on July 20, 2011 is 1.75″, reported near Jacobsville, MI.

Some reports show UNK instead of a wind speed or tornado rating — what does that mean?

Wind reports come three ways: measured from an instrument, estimated from the damage observed, or UNK when no speed was recorded. Tornadoes show UNK until the National Weather Service finishes a damage survey and assigns an EF rating. UNK simply means that value was not available when the report was filed.

A report appeared near my home on July 20, 2011 — is my roof damaged?

Not necessarily. A storm report shows that hail, wind, or a tornado was observed nearby, not that any specific home was hit. To find out whether your property was affected, check an address-level hail report, and if it looks significant, ask a local pro about a Remote Hail Inspection before scheduling roof work.

I am buying or selling a home — how do these on July 20, 2011 reports help?

If a storm passed through, a roof or exterior may have damage that is hard to see, or a recent repair may trace back to it. Buyers can ask better questions before closing, and sellers can document the home condition up front — both starting from the property address rather than a whole region.

How do I check what happened at a specific address on July 20, 2011?

Use the address search to pull a free address-level hail report for any property — 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 on July 20, 2011 across the United States, sourced from NOAA SPC and NWS Local Storm Reports. They show where hail, wind, or tornado activity was reported, 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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