Heads up! Small hail spotted in these regions: Kingsport, TN • Huntsville, AL • Gadsden, AL • Johnson City, TN • Grand Junction, CO • Colorado Springs, CO • Denver, CO      ATTENTION! Damaging hail detected. Hail tracking is now active for these regions: Fayetteville, NC • Durham, NC • Raleigh, NC • Saint Louis, MO • Rawlins, WY • Champaign, IL • Mattoon, IL • Sebring, FL • North Port, FL • Fort Myers, FL • Tampa, FL • Hickory, NC • Charlotte, NC • Knoxville, TN • Evansville, IN • Farmington, NM • Louisville, KY • Winston, NC • Greensboro, NC • Provo, UT • Logan, UT • Ogden, UT • Salt Lake City, UT      
HailGeeks
NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports on August 18, 2021

Public hail, wind, and tornado reports across the United States on August 18, 2021 from August 18, 2021 through August 18, 2021, 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
0
Wind Reports
66
Tornado Reports
5
Max Hail Size
--
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · August 18, 2021 · 2021–present Updated  Daily · last Aug 18, 2021

NWS Hail Reports on August 18, 2021

0 reports
Free hail report for your home →

No hail reports were found for this selection.

Showing 0 of 0
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 18, 2021

66 reports
Free hail report + wind check →
UNK mph
Aug 18, 2021
11:58 PM UTC
Wind report for August 18, 2021
Lancaster County · 120,566 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: 3 SE Mount Joy, PA
UNK mph
Aug 18, 2021
11:58 PM UTC
Wind report for August 18, 2021
Lancaster County · 120,566 Homes in County
Wind Report Description: TREES DOWN ON WIRES NEAR MANHEIM.
NWS Wind Report Location: Manheim, PA
UNK mph
Aug 18, 2021
11:45 PM UTC
Wind report for August 18, 2021
Limestone County · 34,185 Homes in County
Wind Report Description: CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 NW ATHENS. TREES FELL INTO POWERLINES ALONG MARKET ST... BETWEEN SHANNON ST AND HINE ST. TIME ESTIMATED FROM RADAR. POSSIBLE TORNADO.
NWS Wind Report Location: 2 NW Athens, AL
UNK mph
Aug 18, 2021
11:16 PM UTC
Wind report for August 18, 2021
York County · 120,919 Homes in County
Wind Report Description: TREES DOWN ON WIRES IN SOUTH HANOVER.
NWS Wind Report Location: 1 SSE Pennville, PA
UNK mph
Aug 18, 2021
10:32 PM UTC
Wind report for August 18, 2021
Chester County · 127,346 Homes in County
Wind Report Description: TWO POLES SNAPPED ALONG ROUTE 896. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 1 ESE Homeville, PA
UNK mph
Aug 18, 2021
10:21 PM UTC
Wind report for August 18, 2021
Colbert County · 21,398 Homes in County
Wind Report Description: TREE DOWNED IN THE 800 BLOCK OF LIGON RD. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 4 W Littleville, AL
UNK mph
Aug 18, 2021
10:11 PM UTC
Wind report for August 18, 2021
Maricopa County · 1,189,056 Homes in County
Wind Report Description: CORRECTS PREVIOUS FLASH FLOOD REPORT FROM 1 WNW MESA. LARGE TREE FELL ON POWER LINES... RESULTING IN POWER OUTAGE TO 600 CUSTOMERS.
NWS Wind Report Location: 1 WNW Mesa, AZ
UNK mph
Aug 18, 2021
10:08 PM UTC
Wind report for August 18, 2021
Cumberland County · 65,680 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: 1 NNE Mount Holly Sprin, PA
UNK mph
Aug 18, 2021
10:08 PM UTC
Wind report for August 18, 2021
Cumberland County · 65,680 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: 3 WSW Hogestown, PA
UNK mph
Aug 18, 2021
9:48 PM UTC
Wind report for August 18, 2021
Dauphin County · 63,287 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: 1 NE Halifax, PA
UNK mph
Aug 18, 2021
9:43 PM UTC
Wind report for August 18, 2021
Adams County · 32,441 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: 3 W Cashtown, PA
UNK mph
Aug 18, 2021
9:41 PM UTC
Wind report for August 18, 2021
Perry County · 15,788 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: 1 ENE Duncannon, PA
UNK mph
Aug 18, 2021
9:37 PM UTC
Wind report for August 18, 2021
Mifflin County · 15,074 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: Yeagertown, PA
UNK mph
Aug 18, 2021
9:35 PM UTC
Wind report for August 18, 2021
Colbert County · 21,398 Homes in County
Wind Report Description: TREE DOWNED IN THE 9000 BLOCK OF RIVERTON ROSE TRAIL. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 4 SSW Waterloo, AL
UNK mph
Aug 18, 2021
9:35 PM UTC
Wind report for August 18, 2021
Cumberland County · 65,680 Homes in County
Wind Report Description: TREES DOWN ON WIRES.
NWS Wind Report Location: 2 WSW Pine Grove Furnac, PA
Showing 15 of 66
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 18, 2021

5 reports
UNK category
Aug 18, 2021
11:51 PM UTC
Tornado report for August 18, 2021
Limestone County · 34,185 Homes in County
Tornado Report Description: TORNADO SPOTTED MOVING AWAY FROM OBSERVERS... WHO WERE LOCATED ALONG US HWY 31 IN TANNER.
NWS Tornado Report Location: 2 N Athens, AL
UNK category
Aug 18, 2021
10:31 PM UTC
Tornado report for August 18, 2021
Dauphin County · 63,287 Homes in County
Tornado Report Description: 1.5 MILE LONG PATH; 150 YARDS WIDE WITH ESTIMATED MAXIMUM WINDS NEAR 105 MPH.
NWS Tornado Report Location: 2 SE Halifax, PA
UNK category
Aug 18, 2021
8:35 PM UTC
Tornado report for August 18, 2021
Snyder County · 12,088 Homes in County
Tornado Report Description: 0.5MI/15YD PATH LENGTH/WIDTH WITH ESTIMATED MAX WIND 65-70MPH.
NWS Tornado Report Location: 3 ENE Middleburg, PA
UNK category
Aug 18, 2021
7:16 PM UTC
Tornado report for August 18, 2021
Adams County · 32,441 Homes in County
Tornado Report Description: NWS CONFIRMS AN EF-0 TORNADO WITH EST MAX WIND 65 MPH. SEVERAL LARGE BRANCHES WERE SNAPPED AND A FEW TREES AND LARGE LIMBS WERE SNAPPED AND DOWNED IN THE AREA. EST PATH LENGTH 0.7 MILE.... WIDTH 75 YDS.
NWS Tornado Report Location: 2 ENE Heidlersburg, PA
UNK category
Aug 18, 2021
4:46 PM UTC
Tornado report for August 18, 2021
Schuylkill County · 38,959 Homes in County
Tornado Report Description: EF-0 TORNADO TOUCHED DOWN NEAR W MAIN ST AND BROAD ST IN VALLEY VIEW... PA AND WAS ON THE GROUND FOR UNDER 1 MINUTE. A FEW APPLE TREES WERE DOWNED AND A FEW ROOFS WERE DAMAGED. EST MAX WIND 65 MPH. EST PATH LENGTH 75 YDS.
NWS Tornado Report Location: 1 S Valley View, PA
Showing 5 of 5
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 18, 2021 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 18, 2021? 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 18, 2021?

Our records show 0 hail, 66 wind, and 5 tornado reports on August 18, 2021, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 18, 2021.

What was the largest hail reported on August 18, 2021?

No reported hail size is available for this selection.

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 18, 2021 — 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 18, 2021 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 18, 2021?

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 18, 2021 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.