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NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports on August 20, 2011

Public hail, wind, and tornado reports across the United States on August 20, 2011 from August 20, 2011 through August 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 19, 2026.
Hail Reports
29
Wind Reports
99
Tornado Reports
1
Max Hail Size
2.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · August 20, 2011 · 2011–present Updated  Daily · last Aug 20, 2011

NWS Hail Reports on August 20, 2011

29 reports
Free hail report for your home →
0.75″ hail
Aug 20, 2011
11:33 PM EST-5
Hail report for August 20, 2011
Lake County · 76,737 Homes in County
Hail Report Description: Penny sized hail was observed.
NWS Hail Report Location: N Willoughby, OH
1.00″ hail
Aug 20, 2011
8:31 PM MST-7
Hail report for August 20, 2011
Logan County · 6,601 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 7.22 NNW Willard, CO
0.75″ hail
Aug 20, 2011
9:15 PM EST-5
Hail report for August 20, 2011
Gaston County · 72,817 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: .89 NW Gastonia, NC
1.00″ hail
Aug 20, 2011
8:55 PM EST-5
Hail report for August 20, 2011
Cleveland County · 30,885 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: .69 S Kings Mtn, NC
0.75″ hail
Aug 20, 2011
5:40 PM MST-7
Hail report for August 20, 2011
Salt Lake County · 267,522 Homes in County
Hail Report Description: Hail with a diameter of approximately 0.75 inches was observed near Murray.
NWS Hail Report Location: 1.48 SSW Murray, UT
1.00″ hail
Aug 20, 2011
6:03 PM CST-6
Hail report for August 20, 2011
Newton County · 3,334 Homes in County
Hail Report Description: Hail was reported along Arkansas 7.
NWS Hail Report Location: .59 ENE Gum Spg, AR
1.00″ hail
Aug 20, 2011
5:55 PM CST-6
Hail report for August 20, 2011
Newton County · 3,334 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Parthenon, AR
2.50″ hail
Aug 20, 2011
5:23 PM CST-6
Hail report for August 20, 2011
Stone County · 14,763 Homes in County
Hail Report Description: The Fire Chief reported tennis ball size hail.
NWS Hail Report Location: 1.49 NNW Crane, MO
2.75″ hail
Aug 20, 2011
5:22 PM CST-6
Hail report for August 20, 2011
Lawrence County · 12,673 Homes in County
Hail Report Description: Baseball size hail broke sky lights at the Walmart.
NWS Hail Report Location: N Aurora, MO
1.75″ hail
Aug 20, 2011
5:15 PM CST-6
Hail report for August 20, 2011
Lawrence County · 12,673 Homes in County
Hail Report Description: TV media relayed a report of golf ball size hail in Aurora.
NWS Hail Report Location: N Aurora, MO
1.00″ hail
Aug 20, 2011
5:06 PM CST-6
Hail report for August 20, 2011
Lawrence County · 12,673 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Aurora, MO
0.75″ hail
Aug 20, 2011
5:53 PM EST-5
Hail report for August 20, 2011
Laurens County · 19,547 Homes in County
Hail Report Description: Penny size hail was reported on highway 66 near Duck Pond Dr.
NWS Hail Report Location: 2.88 ENE Bonds Xrds, SC
1.75″ hail
Aug 20, 2011
4:46 PM CST-6
Hail report for August 20, 2011
Lawrence County · 12,673 Homes in County
Hail Report Description: TV media relayed a public report of golf ball size hail in Freistatt. There was another public report of golf ball size hail on I-44 in the same area.
NWS Hail Report Location: 1.1 E Friestatt, MO
1.25″ hail
Aug 20, 2011
4:40 PM CST-6
Hail report for August 20, 2011
Lawrence County · 12,673 Homes in County
Hail Report Description: The public reported half dollar size hail at the Super Stop gas station.
NWS Hail Report Location: 2.35 SSE Stotts City, MO
0.75″ hail
Aug 20, 2011
1:26 PM EST-5
Hail report for August 20, 2011
Genesee County · 135,471 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1.01 E Otisville, MI
Showing 15 of 29
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 August 20, 2011

99 reports
Free hail report + wind check →
64 mph
Aug 20, 2011
11:50 PM MST-7
Wind report for August 20, 2011
Bonneville County · 33,030 Homes in County
Wind Report Description: Early on August 21st a thunderstorm caused trees to into a house on Pioneer Road in Idaho Falls killing an 82 year old man in his bedroom. Trees were also downed on East Lincoln Road.
NWS Wind Report Location: N Idaho Falls, ID
60 mph
Aug 20, 2011
8:53 PM CST-6
Wind report for August 20, 2011
White County · 21,864 Homes in County
Wind Report Description: Trees fell on two mobile homes on First St., and a transformer fell onto Austin St.
NWS Wind Report Location: .61 ESE Pangburn, AR
70 mph
Aug 20, 2011
8:25 PM CST-6
Wind report for August 20, 2011
Cleburne County · 11,625 Homes in County
Wind Report Description: Trees were blown down, with two of the trees landing on vehicles. A concrete picnic table at a motel was blown over a fence.
NWS Wind Report Location: .89 ENE Heber Spgs, AR
58 mph
Aug 20, 2011
8:40 PM EST-5
Wind report for August 20, 2011
Cleveland County · 30,885 Homes in County
Wind Report Description: Spotter reported a carport lifted and tossed and a light pole blown down on Range Rd.
NWS Wind Report Location: 2.76 N Archdale, NC
81 mph
Aug 20, 2011
7:10 PM CST-6
Wind report for August 20, 2011
Marshall County · 5,239 Homes in County
Wind Report Description: A large shed was blown apart by damaging winds from an isolated thunderstorm. Debris was blown into nearby trees and power lines.
NWS Wind Report Location: 2.08 E Camp Grove, IL
62 mph
Aug 20, 2011
7:00 PM CST-6
Wind report for August 20, 2011
Ouachita Parish · 46,395 Homes in County
Wind Report Description: Trees and powerlines were downed on Philpot Road.
NWS Wind Report Location: 1.88 WNW Maidoo, LA
60 mph
Aug 20, 2011
6:50 PM CST-6
Wind report for August 20, 2011
Pope County · 19,680 Homes in County
Wind Report Description: Trees were blown down along Arkansas 27.
NWS Wind Report Location: 1.09 WSW Tilly, AR
60 mph
Aug 20, 2011
6:25 PM CST-6
Wind report for August 20, 2011
Taney County · 15,708 Homes in County
Wind Report Description: A power pole was blown down.
NWS Wind Report Location: N Hollister, MO
70 mph
Aug 20, 2011
6:25 PM CST-6
Wind report for August 20, 2011
Taney County · 15,708 Homes in County
Wind Report Description: The fire department estimated 70 mph wind gusts.
NWS Wind Report Location: 1.31 WNW Kissee Mills, MO
60 mph
Aug 20, 2011
6:20 PM CST-6
Wind report for August 20, 2011
Newton County · 3,334 Homes in County
Wind Report Description: Trees were blown down.
NWS Wind Report Location: N Deer, AR
60 mph
Aug 20, 2011
6:10 PM CST-6
Wind report for August 20, 2011
Taney County · 15,708 Homes in County
Wind Report Description: Several trees were blown down just east of Forsyth.
NWS Wind Report Location: N Forsyth, MO
60 mph
Aug 20, 2011
6:03 PM CST-6
Wind report for August 20, 2011
Newton County · 3,334 Homes in County
Wind Report Description: Numerous trees were blown down along Arkansas 21. Three parked vehicles were crushed by falling trees.
NWS Wind Report Location: 2.49 NE Fallsville, AR
62 mph
Aug 20, 2011
5:20 PM CST-6
Wind report for August 20, 2011
Cass County · 10,098 Homes in County
Wind Report Description: Trees were snapped and uprooted in Mc Leod. Metal signs were twisted and blown down.
NWS Wind Report Location: N Mc Leod, TX
62 mph
Aug 20, 2011
5:20 PM CST-6
Wind report for August 20, 2011
Upshur County · 12,760 Homes in County
Wind Report Description: Trees and powerlines were downed.
NWS Wind Report Location: 1.81 NW Glenwood, TX
75 mph
Aug 20, 2011
5:16 PM CST-6
Wind report for August 20, 2011
Franklin County · 5,799 Homes in County
Wind Report Description: Several large trees were blown down by strong thunderstorm winds betweek Ozark and Pleasant View.
NWS Wind Report Location: 4 WSW Ozark, AR
Showing 15 of 99
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 August 20, 2011

1 reports
EF0 category
Aug 20, 2011
2:00 PM EST-5
Tornado report for August 20, 2011
Saginaw County · 65,438 Homes in County
Tornado Report Description: A storm survey conducted by the National Weather Service confirmed an EF0 tornado near Chesaning on Saturday August 20, 2011. The track began near the intersection of Mckeighan and Baldwin roads at approximately 300 pm. The tornado then tracked east and ended near the intersection of Chesaning and Stuart roads. The tornado was 100 yards wide with wind speeds up to 80 mph. Damage was mainly limited to large trees and an overturned trailer.
NWS Tornado Report Location: 1.48 NNW Chesaning Arpt, MI
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 August 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 August 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 August 20, 2011?

Our records show 29 hail, 99 wind, and 1 tornado reports on August 20, 2011, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 20, 2011.

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

The largest hail size in these storm-report records on August 20, 2011 is 2.75″, reported near N Aurora, MO.

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 August 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 August 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 August 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 August 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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