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 August 20, 2012

Public hail, wind, and tornado reports across the United States on August 20, 2012 from August 20, 2012 through August 20, 2012, 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
12
Wind Reports
30
Tornado Reports
0
Max Hail Size
1.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · August 20, 2012 · 2012–present Updated  Daily · last Aug 20, 2012

NWS Hail Reports on August 20, 2012

12 reports
Free hail report for your home →
1.25″ hail
Aug 20, 2012
6:30 PM CST-6
Hail report for August 20, 2012
Castro County · 2,317 Homes in County
Hail Report Description: Hail slightly larger than quarters pummeled the Flagg community for nearly 30 minutes. Combined with ferocious downburst winds, hundreds of acres of mature corn and grain crops were destroyed or severely damaged. Torrential rains piled the hail into drifts nearly 12 inches deep in places. With record high corn prices, total crop losses would likely top $100,000.
NWS Hail Report Location: 7.54 SW Dimmitt, TX
0.88″ hail
Aug 20, 2012
5:23 PM CST-6
Hail report for August 20, 2012
Potter County · 33,304 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Valle De Oro, TX
0.75″ hail
Aug 20, 2012
5:12 PM CST-6
Hail report for August 20, 2012
Potter County · 33,304 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Valle De Oro, TX
1.00″ hail
Aug 20, 2012
5:10 PM CST-6
Hail report for August 20, 2012
Potter County · 33,304 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Valle De Oro, TX
1.00″ hail
Aug 20, 2012
4:40 PM CST-6
Hail report for August 20, 2012
Deaf Smith County · 5,616 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: .69 S Hereford, TX
1.75″ hail
Aug 20, 2012
4:28 PM CST-6
Hail report for August 20, 2012
Deaf Smith County · 5,616 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4.48 SSW Hereford, TX
1.25″ hail
Aug 20, 2012
2:20 PM MST-7
Hail report for August 20, 2012
Mohave County · 74,754 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3.53 NNE Walapai, AZ
0.75″ hail
Aug 20, 2012
3:08 PM CST-6
Hail report for August 20, 2012
Grundy County · 15,147 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Morris, IL
1.00″ hail
Aug 20, 2012
12:30 PM CST-6
Hail report for August 20, 2012
Lake County · 179,407 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: N Lake Zurich, IL
0.88″ hail
Aug 20, 2012
1:30 PM EST-5
Hail report for August 20, 2012
Clay County · 64,109 Homes in County
Hail Report Description: The Green Cove Springs Post Office observed nickel size hail near State Road 16 and County Road 218.
NWS Hail Report Location: .6 E Penney Farms, FL
0.75″ hail
Aug 20, 2012
12:05 PM EST-5
Hail report for August 20, 2012
Trumbull County · 72,618 Homes in County
Hail Report Description: Penny sized hail was observed.
NWS Hail Report Location: N Leavittsburg, OH
0.88″ hail
Aug 20, 2012
11:55 AM EST-5
Hail report for August 20, 2012
Trumbull County · 72,618 Homes in County
Hail Report Description: Nickel sized hail was observed.
NWS Hail Report Location: 3 W Warren, OH
Showing 12 of 12
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, 2012

30 reports
Free hail report + wind check →
45 mph
Aug 20, 2012
9:30 PM EST-5
Wind report for August 20, 2012
Hillsborough County · 352,225 Homes in County
Wind Report Description: Thunderstorm wind gusts knocked down an elongated temporary tent being setup as a tunnel for the Republican National Convention. Wind gusts in the area were reported as high as 45 MPH.
NWS Wind Report Location: 1.55 NNW Tpa P O Knight Arpt, FL
75 mph
Aug 20, 2012
7:30 PM MST-7
Wind report for August 20, 2012
Maricopa County · 1,189,056 Homes in County
Wind Report Description: Scattered thunderstorms developed across the greater Phoenix area during the afternoon and early evening hours on August 20th and they affected east valley communities which included Mesa and Superstition Springs. Due to the very moist and unstable nature of the atmosphere, the storms generated strong, gusty and damaging microburst winds. According to a report from the public, at 730 pm gusty winds estimated to be at least 65 knots completely blew down a section block wall at the intersection of Kiowa and Roslyn Street in Mesa. The block wall was was at least 20 feet in length.
NWS Wind Report Location: 2.37 SSW Desert Sands, AZ
58 mph
Aug 20, 2012
8:26 PM CST-6
Wind report for August 20, 2012
Lubbock County · 89,558 Homes in County
Wind Report Description: The Lubbock ASOS measured a wind gust to 58 mph. No damage was reported.
NWS Wind Report Location: 2.37 SSE (Lbb)Lubbock Intl Ar, TX
58 mph
Aug 20, 2012
8:20 PM CST-6
Wind report for August 20, 2012
Hall County · 1,539 Homes in County
Wind Report Description: Measured by a Texas Tech University West Texas mesonet.
NWS Wind Report Location: 3.17 WSW Turkey, TX
75 mph
Aug 20, 2012
7:15 PM MST-7
Wind report for August 20, 2012
Maricopa County · 1,189,056 Homes in County
Wind Report Description: Scattered thunderstorms developed over the greater Phoenix area during the afternoon and early evening hours on August 20th. Some of the thunderstorms generated both very heavy rain and strong, gusty and damaging microburst winds. According to a trained weather spotter in East Mesa, at 715 pm thunderstorm wind gusts estimated to be at least 65 knots blew down a carport and caused damage to the roof of the home to which the carport was attached. In addition, a number of tree branches with diameters up to 3 inches were downed in the area.
NWS Wind Report Location: .9 SE Buckhorn, AZ
81 mph
Aug 20, 2012
7:05 PM MST-7
Wind report for August 20, 2012
Maricopa County · 1,189,056 Homes in County
Wind Report Description: Scattered thunderstorms developed across the greater Phoenix metropolitan area during the late afternoon hours on August 20th and they affected the community of Chandler. The storms generated strong and gusty microburst winds, with peak gusts estimated to be at least 70 knots. Local broadcast media reported that numerous trees were downed across the Chandler Fashion Center north parking lot and along the Loop 101 near Chandler Boulevard. This occurred at approximately 7 pm. Tree trunk diameters were estimated to almost 12 inches at the largest, with additional downed limbs approaching 6 inches in diameter. In addition, at 720 pm a trained weather spotter in Chandler reported trees downed near the intersection of Chandler Boulevard and the 101.
NWS Wind Report Location: .69 N Hightown, AZ
70 mph
Aug 20, 2012
7:32 PM CST-6
Wind report for August 20, 2012
Armstrong County · 805 Homes in County
Wind Report Description: The Armstrong County Emergency Manager estimated thunderstorm wind gusts just north of Claude, Texas, however there was no damage and no reports of injuries or fatalities.
NWS Wind Report Location: .57 E Claude, TX
64 mph
Aug 20, 2012
7:00 PM CST-6
Wind report for August 20, 2012
Potter County · 33,304 Homes in County
Wind Report Description: Thunderstorm wind gusts blew a stop sign off of its post at 45th Avenue and Georgia Street. There were no injuries or fatalities.
NWS Wind Report Location: N Amarillo, TX
64 mph
Aug 20, 2012
6:58 PM CST-6
Wind report for August 20, 2012
Potter County · 33,304 Homes in County
Wind Report Description: Thunderstorm wind gusts blew down a large tree about ten feet tall and six inches in diameter in the backyard of a residence. There were no injuries or fatalities.
NWS Wind Report Location: N Amarillo, TX
60 mph
Aug 20, 2012
6:55 PM CST-6
Wind report for August 20, 2012
Randall County · 42,834 Homes in County
Wind Report Description: Thunderstorm wind gusts caused a power outage around the 45th Avenue and Western Street area. There were no injuries or fatalities.
NWS Wind Report Location: 4.84 S Amarillo, TX
61 mph
Aug 20, 2012
6:44 PM CST-6
Wind report for August 20, 2012
Randall County · 42,834 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: N Lake Tanglewood, TX
64 mph
Aug 20, 2012
6:40 PM CST-6
Wind report for August 20, 2012
Potter County · 33,304 Homes in County
Wind Report Description: Thunderstorm wind gusts caused damage to an open hangar door at the Rick Husband International Airport. There were no reports of injuries or fatalities.
NWS Wind Report Location: .89 NE (Ama)Amarillo Intl A, TX
64 mph
Aug 20, 2012
6:40 PM CST-6
Wind report for August 20, 2012
Randall County · 42,834 Homes in County
Wind Report Description: Thunderstorm wind gusts blew off the roof of a metal building near the Claude Highway (Farm to Market Road 1151) and Tanglewood Road. There were no injuries or fatalities.
NWS Wind Report Location: N Lake Tanglewood, TX
78 mph
Aug 20, 2012
6:40 PM CST-6
Wind report for August 20, 2012
Randall County · 42,834 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: 2.76 S Amarillo, TX
74 mph
Aug 20, 2012
6:40 PM CST-6
Wind report for August 20, 2012
Potter County · 33,304 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: N (Ama)Amarillo Intl A, TX
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.

NWS Tornado Reports on August 20, 2012

0 reports

No tornado reports were found for this selection.

Showing 0 of 0
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, 2012 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, 2012? 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, 2012?

Our records show 12 hail, 30 wind, and 0 tornado reports on August 20, 2012, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 20, 2012.

What was the largest hail reported on August 20, 2012?

The largest hail size in these storm-report records on August 20, 2012 is 1.75″, reported near Hereford, TX.

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, 2012 — 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, 2012 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, 2012?

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, 2012 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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