ATTENTION! Damaging hail detected. Hail tracking is now active for these regions: Provo, UT • Logan, UT • Salt Lake City, UT      
HailGeeks
NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports on August 21, 2020

Public hail, wind, and tornado reports across the United States on August 21, 2020 from August 21, 2020 through August 21, 2020, 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
16
Wind Reports
67
Tornado Reports
2
Max Hail Size
1.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · August 21, 2020 · 2020–present Updated  Daily · last Aug 21, 2020

NWS Hail Reports on August 21, 2020

16 reports
Free hail report for your home →
1.50″ hail
Aug 21, 2020
11:18 PM UTC
Hail report for August 21, 2020
Grant County · 2,677 Homes in County
Hail Report Description: REPORT RELAYED VIA SOCIAL MEDIA. RADAR ESTIMATED TIME. THIS CORRECTS TIMING FOR PRIOR LSR AT THIS LOCATION.
NWS Hail Report Location: 2 N Milbank, SD
1.00″ hail
Aug 21, 2020
10:56 PM UTC
Hail report for August 21, 2020
Grant County · 2,677 Homes in County
Hail Report Description: RADAR ESTIMATED TIME.
NWS Hail Report Location: 4 ENE Marvin, SD
1.00″ hail
Aug 21, 2020
10:15 PM UTC
Hail report for August 21, 2020
Monroe County · 6,816 Homes in County
Hail Report Description: QUARTER SIZE HAIL. REPORT VIA SOCIAL MEDIA.
NWS Hail Report Location: Uriah, AL
1.00″ hail
Aug 21, 2020
10:08 PM UTC
Hail report for August 21, 2020
Marinette County · 23,369 Homes in County
Hail Report Description: A COUPLE QUARTER SIZED HAIL STONES... MOSTLY NICKEL SIZED... AT THE APPLE ORCHARD ON CHAPMAN ROAD. TIME ESTIMATED BY RADAR.
NWS Hail Report Location: 6 SW Niagara, WI
1.25″ hail
Aug 21, 2020
10:06 PM UTC
Hail report for August 21, 2020
Marinette County · 23,369 Homes in County
Hail Report Description: REPORT WITH PHOTO VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.
NWS Hail Report Location: 3 SW Niagara, WI
1.00″ hail
Aug 21, 2020
9:15 PM UTC
Hail report for August 21, 2020
Delta County · 15,566 Homes in County
Hail Report Description: PHOTO RECEIVED VIA SOCIAL MEDIA.
NWS Hail Report Location: Bark River, MI
1.00″ hail
Aug 21, 2020
11:55 AM UTC
Hail report for August 21, 2020
Polk County · 10,621 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 7 SE Crookston, MN
1.75″ hail
Aug 21, 2020
11:11 AM UTC
Hail report for August 21, 2020
Marshall County · 3,501 Homes in County
Hail Report Description: NEAR THE CAMPGROUND AND GOLF COURSE. PING PONG BALL TO GOLF BALL SIZED HAIL.
NWS Hail Report Location: Grygla, MN
1.50″ hail
Aug 21, 2020
10:55 AM UTC
Hail report for August 21, 2020
Polk County · 10,621 Homes in County
Hail Report Description: HAIL A COUPLE TIMES. LARGEST WAS JUST BEFORE 6 AM CDT.
NWS Hail Report Location: 4 SSW Euclid, MN
1.00″ hail
Aug 21, 2020
10:20 AM UTC
Hail report for August 21, 2020
Marshall County · 3,501 Homes in County
Hail Report Description: NICKEL TO QUARTER SIZED HAIL.
NWS Hail Report Location: 7 W Grygla, MN
1.00″ hail
Aug 21, 2020
10:00 AM UTC
Hail report for August 21, 2020
Grand Forks County · 14,937 Homes in County
Hail Report Description: QUARTER SIZED HAIL MEASURED AT THE GRAND FORKS NATIONAL WEATHER SERVICE.
NWS Hail Report Location: 3 W Grand Forks, ND
1.00″ hail
Aug 21, 2020
9:40 AM UTC
Hail report for August 21, 2020
Marshall County · 3,501 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 11 SE Holt, MN
1.25″ hail
Aug 21, 2020
8:52 AM UTC
Hail report for August 21, 2020
Marshall County · 3,501 Homes in County
Hail Report Description: RELAYED REPORT OF HALF DOLLAR SIZED HAIL
NWS Hail Report Location: 1 S Holt, MN
1.50″ hail
Aug 21, 2020
6:05 AM UTC
Hail report for August 21, 2020
Kittson County · 1,812 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 2 S Hallock, MN
1.25″ hail
Aug 21, 2020
5:50 AM UTC
Hail report for August 21, 2020
Kittson County · 1,812 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Orleans, MN
Showing 15 of 16
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 21, 2020

67 reports
Free hail report + wind check →
60 mph
Aug 21, 2020
11:34 PM UTC
Wind report for August 21, 2020
Yavapai County · 83,199 Homes in County
Wind Report Description: NICKEL SIZED HAIL... STRONG WINDS AND HEAVY RAIN.
NWS Wind Report Location: 4 WSW Cottonwood-Verde, AZ
UNK mph
Aug 21, 2020
11:00 PM UTC
Wind report for August 21, 2020
Big Stone County · 2,471 Homes in County
Wind Report Description: TOP OF A LARGE EVERGREEN TREE BLOWN OFF. RADAR ESTIMATED TIME.
NWS Wind Report Location: 2 SE Graceville, MN
61 mph
Aug 21, 2020
10:47 PM UTC
Wind report for August 21, 2020
Lee County · 235,829 Homes in County
Wind Report Description: AVIATION BUSINESS NEAR RSW MEASURED A 61 MPH PEAK WIND GUST. RELAYED VIA BROADCAST MEDIA.
NWS Wind Report Location: Southwest Internat, FL
UNK mph
Aug 21, 2020
9:43 PM UTC
Wind report for August 21, 2020
Tuscaloosa County · 62,512 Homes in County
Wind Report Description: A FEW TREES WERE BLOWN DOWN NEAR FOSTERS.
NWS Wind Report Location: 2 WNW Fosters, AL
60 mph
Aug 21, 2020
9:30 PM UTC
Wind report for August 21, 2020
Marshall County · 2,002 Homes in County
Wind Report Description: DIME SIZE HAIL AND ESTIMATED WINDS OVER 60 MPH.
NWS Wind Report Location: 5 ESE Lake City, SD
UNK mph
Aug 21, 2020
8:57 PM UTC
Wind report for August 21, 2020
Dickinson County · 11,466 Homes in County
Wind Report Description: SNAPPED TREE OBSERVED ALONG M-95 SOUTH OF SAGOLA. ESTIMATE OF 1 INCH HAIL. HEAVY RAIN OBSERVED. TIME ESTIMATED VIA RADAR.
NWS Wind Report Location: 1 NNW Randville, MI
UNK mph
Aug 21, 2020
8:34 PM UTC
Wind report for August 21, 2020
Dickinson County · 11,466 Homes in County
Wind Report Description: SEVERAL TREES SNAPPED. ESTIMATING DIAMETER TO BE 1-1.5 FEET. TIME ESTIMATED VIA RADAR.
NWS Wind Report Location: 3 N Channing, MI
62 mph
Aug 21, 2020
8:17 PM UTC
Wind report for August 21, 2020
Seminole County · 121,347 Homes in County
Wind Report Description: MEASURED WIND GUST OF 62 MPH/54 KT AT THE INTERSECTION OF LAKE MARY BLVD AND STATE ROAD 46.
NWS Wind Report Location: 4 N Lake Jessup, FL
59 mph
Aug 21, 2020
8:15 PM UTC
Wind report for August 21, 2020
Seminole County · 121,347 Homes in County
Wind Report Description: WIND GUST OF 59 MPH/51 KT FROM THE WEST AT KSFB. RE-TRANSMITTED.
NWS Wind Report Location: Sanford, FL
UNK mph
Aug 21, 2020
8:13 PM UTC
Wind report for August 21, 2020
Rutland County · 23,171 Homes in County
Wind Report Description: TREES/UTILITY LINES DOWNED BY THUNDERSTORM WINDS NEAR ROUTE 140.
NWS Wind Report Location: Middletown Springs, VT
58 mph
Aug 21, 2020
8:10 PM UTC
Wind report for August 21, 2020
Seminole County · 121,347 Homes in County
Wind Report Description: GUST OF 58 MPH/50 KT FROM THE WEST AT KSFB.
NWS Wind Report Location: Sanford Airport, FL
UNK mph
Aug 21, 2020
8:05 PM UTC
Wind report for August 21, 2020
Seminole County · 121,347 Homes in County
Wind Report Description: PUBLIC REPORTS DAMAGE TO SEVERAL FENCES... PORCHES... AWNINGS... AND BACKYARD SCREEN ENCLOSURES IN THE CHASE GROVE AREA. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 2 ENE Lake Mary, FL
UNK mph
Aug 21, 2020
8:05 PM UTC
Wind report for August 21, 2020
Seminole County · 121,347 Homes in County
Wind Report Description: COUNTY OFFICIALS REPORT MANY LARGE TREE BRANCHES DOWNED NEAR W AIRPORT BLVD.... JUST NORTH OF SR 417. ALSO... A MEDIUM SIZED TREE WAS DOWNED BY THE WINDS. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 5 NW Lake Jessup, FL
UNK mph
Aug 21, 2020
8:04 PM UTC
Wind report for August 21, 2020
Rutland County · 23,171 Homes in County
Wind Report Description: TREES DOWN ON ROUTE 30 NEAR LAKE SAINT CATHERINE GOLF COURSE
NWS Wind Report Location: Lake St. Catherine, VT
UNK mph
Aug 21, 2020
8:00 PM UTC
Wind report for August 21, 2020
Seminole County · 121,347 Homes in County
Wind Report Description: LARGE TREE LIMBS AND BRANCHES DOWN NEAR LIVE OAK BLVD AND HIDDEN LAKE DR.
NWS Wind Report Location: 5 NW Lake Jessup, FL
Showing 15 of 67
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 21, 2020

2 reports
UNK category
Aug 21, 2020
9:03 PM UTC
Tornado report for August 21, 2020
Marshall County · 2,002 Homes in County
Tornado Report Description: A TORNADO BRIEFLY TOUCHED DOWN ON ROY LAKE.
NWS Tornado Report Location: 1 SSW Roy Lake State Pa, SD
UNK category
Aug 21, 2020
12:45 AM UTC
Tornado report for August 21, 2020
Otero County · 6,773 Homes in County
Tornado Report Description: DELAYED REPORT: STORM CHASER ON CO-10 SOUTHWEST OF LA JUNTA CAPTURED A BRIEF TORNADO OVER OPEN FIELDS ON SUNDAY EVENING. VIDEO SHOWS A QUICKLY DESCENDING FUNNEL REACHING THE GROUND AND THEN QUICKLY BECOMING ENVELOPED BY SHEETS OF RAIN. THE TORNADO LASTED NO LONGER THAN 2-MINUTES... PER CHASERS VIDEO... OR AT LEAST BEFORE THE SHEETS OF RAIN OBSCURED THE VIEW.
NWS Tornado Report Location: 11 NW Timpas, CO
Showing 2 of 2
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 21, 2020 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 21, 2020? 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 21, 2020?

Our records show 16 hail, 67 wind, and 2 tornado reports on August 21, 2020, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 21, 2020.

What was the largest hail reported on August 21, 2020?

The largest hail size in these storm-report records on August 21, 2020 is 1.75″, reported near Grygla, MN.

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 21, 2020 — 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 21, 2020 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 21, 2020?

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 21, 2020 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.

Free Hail Report By Address

Check Your Address in Seconds

Free hail report for any address in the contiguous U.S.

Get a Free Hail Report

100% free. No phone or email required.