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NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports on September 21, 2017

Public hail, wind, and tornado reports across the United States on September 21, 2017 from September 21, 2017 through September 21, 2017, 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
5
Wind Reports
27
Tornado Reports
2
Max Hail Size
1.25″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · September 21, 2017 · 2017–present Updated  Daily · last Sep 21, 2017

NWS Hail Reports on September 21, 2017

5 reports
Free hail report for your home →
1.00″ hail
Sep 21, 2017
8:25 PM UTC
Hail report for September 21, 2017
Coffee County · 18,218 Homes in County
Hail Report Description: NUMEROUS REPORT OF 1 HAIL WITH THE STORM ACROSS THE COUNTY. ALSO HEARD OF SOME REPORTS OF STRONG WINDS...BUT DON/T HAVE CONFORMATION. TIME IS ESTIMATED FROM RADAR.
NWS Hail Report Location: 6 NE Manchester, TN
1.00″ hail
Sep 21, 2017
6:25 PM UTC
Hail report for September 21, 2017
Craven County · 32,825 Homes in County
Hail Report Description: NICKEL TO QUARTER SIZE HAIL REPORTED IN PERRYTOWN
NWS Hail Report Location: 2 SW James City, NC
1.00″ hail
Sep 21, 2017
2:07 AM UTC
Hail report for September 21, 2017
Sargent County · 1,512 Homes in County
Hail Report Description: TIME ESTIMATED FROM RADAR.
NWS Hail Report Location: 6 SW Milnor, ND
1.25″ hail
Sep 21, 2017
1:21 AM UTC
Hail report for September 21, 2017
Outagamie County · 56,809 Homes in County
Hail Report Description: HALF DOLLAR SIZE HAIL FELL 1/4 MILE NORTHEAST OF 441 AND COLLEGE AVENUE.
NWS Hail Report Location: 2 E Appleton, WI
1.00″ hail
Sep 21, 2017
12:48 AM UTC
Hail report for September 21, 2017
Calumet County · 17,226 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Sherwood, WI
Showing 5 of 5
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 September 21, 2017

27 reports
Free hail report + wind check →
UNK mph
Sep 21, 2017
11:44 PM UTC
Wind report for September 21, 2017
Pulaski County · 2,654 Homes in County
Wind Report Description: MULITPLE TREES AND POWERLINES DOWN AT INTERSECTION OF HIGHWAY 257 AND NOBLE RD. 1 HOUSE HAD SOME DAMAGE FROM TREE. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 3 WNW Finleyson, GA
UNK mph
Sep 21, 2017
11:39 PM UTC
Wind report for September 21, 2017
Pulaski County · 2,654 Homes in County
Wind Report Description: TREE DOWN ON HWY 257 AND FOLDS RD NW OF PINEVIEW
NWS Wind Report Location: 3 WNW Finleyson, GA
UNK mph
Sep 21, 2017
10:29 PM UTC
Wind report for September 21, 2017
Dodge County · 5,110 Homes in County
Wind Report Description: TREE DOWN ON GRESSTON BAPTIST RD NEAR HARDY RD
NWS Wind Report Location: 2 SSW Gresston, GA
UNK mph
Sep 21, 2017
10:29 PM UTC
Wind report for September 21, 2017
Dodge County · 5,110 Homes in County
Wind Report Description: 2 TREES DOWN ON HARDY RD NEAR DUBOIS CHURCH RD
NWS Wind Report Location: 2 WSW Dubois, GA
UNK mph
Sep 21, 2017
10:29 PM UTC
Wind report for September 21, 2017
Telfair County · 3,213 Homes in County
Wind Report Description: TREE DOWN OFF HWY 280 IN MILAN
NWS Wind Report Location: Milan, GA
UNK mph
Sep 21, 2017
9:13 PM UTC
Wind report for September 21, 2017
Shiawassee County · 24,142 Homes in County
Wind Report Description: REPORT OF MULTIPLE HEALTHY TREES DOWN ABOUT 6 TO 8 INCHES IN DIAMETER.
NWS Wind Report Location: 3 NW Durand, MI
UNK mph
Sep 21, 2017
8:35 PM UTC
Wind report for September 21, 2017
Habersham County · 13,187 Homes in County
Wind Report Description: TREE DOWN ON HOLLYWOOD CHURCH RD. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 6 NNE Clarkesville, GA
UNK mph
Sep 21, 2017
8:16 PM UTC
Wind report for September 21, 2017
Genesee County · 135,471 Homes in County
Wind Report Description: REPORT OF LARGE TREE DOWN ON FRANCES RD... JUST EAST OF NICHOLS
NWS Wind Report Location: 5 NNW Flushing, MI
UNK mph
Sep 21, 2017
6:16 AM UTC
Wind report for September 21, 2017
Kandiyohi County · 15,029 Homes in County
Wind Report Description: 6" DIAMETER TREE LIMB SNAPPED & WAS BLOCKING ROAD.
NWS Wind Report Location: 7 NW Cosmos, MN
UNK mph
Sep 21, 2017
5:30 AM UTC
Wind report for September 21, 2017
Otter Tail County · 29,682 Homes in County
Wind Report Description: NUMEROUS TREES DOWN AROUND TOWN. AT LEAST ONE TREE FELL ON A HOUSE. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: Parkers Prairie, MN
UNK mph
Sep 21, 2017
5:25 AM UTC
Wind report for September 21, 2017
Otter Tail County · 29,682 Homes in County
Wind Report Description: A FEW LARGE 4 TO 6 INCH TREE BRANCHES BROKEN DOWN IN GROVES AND SHELTER BELTS ACROSS EAST CENTRAL HENNING TOWNSHIP.
NWS Wind Report Location: Henning, MN
UNK mph
Sep 21, 2017
5:22 AM UTC
Wind report for September 21, 2017
Swift County · 3,775 Homes in County
Wind Report Description: TREE DAMAGE REPORTED ON THE NORTHWESTERLY SIDE OF CAMP LAKE. A TURKEY BARN'S ROOF AT JENNIE-O INDIAN HILLS FARM WAS TAKEN SOUTHWEST OF CAMP LAKE. BARNS DOWN AND ROOFS OFF ON THE NORTHEAST SIDE OF CAMP LAKE.
NWS Wind Report Location: 9 WNW Sunburg, MN
UNK mph
Sep 21, 2017
4:54 AM UTC
Wind report for September 21, 2017
Grant County · 2,682 Homes in County
Wind Report Description: A FEW LARGE TREE BRANCHES AND LIMBS BROKEN DOWN AROUND TOWN. PEAK WINDS MEASURED AT THE ELBOW LAKE AIRPORT OF 54 MPH.
NWS Wind Report Location: Elbow Lake, MN
UNK mph
Sep 21, 2017
4:40 AM UTC
Wind report for September 21, 2017
Mahnomen County · 2,019 Homes in County
Wind Report Description: NUMEROUS LARGE TREE BRANCHES BROKEN DOWN NEAR TULABY LAKE AND ELBOW LAKE. LOCALIZED POWER OUTAGES CAUSED BY FALLEN BRANCHES KNOCKING DOWN POWER LINES.
NWS Wind Report Location: Tulaby Lake, MN
UNK mph
Sep 21, 2017
3:55 AM UTC
Wind report for September 21, 2017
Becker County · 15,759 Homes in County
Wind Report Description: NUMEROUS LARGE TREE BRANCHES BROKEN DOWN AROUND CORMORANT LAKE WITH POWER LINES KNOCKED DOWN AND LOCALIZED POWER OUTAGES.
NWS Wind Report Location: Cormorant, MN
Showing 15 of 27
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 September 21, 2017

2 reports
UNK category
Sep 21, 2017
12:50 AM UTC
Tornado report for September 21, 2017
Norman County · 2,697 Homes in County
Tornado Report Description: THE TORNADO TRACKED INTERMITTENTLY NORTHWARD ALONG THE HIGHWAY 9 CORRIDOR FOR ABOUT 4 MILES AND ENDED JUST PAST THE COMMUNITY OF BELTRAMI BY 801 PM CDT. AS THE NASCENT TORNADO CROSSED FROM NORMAN COUNTY INTO POLK COUNTY DEBRIS BROKE WINDOWS IN A VEHICLE. THE TORNADO THEN SNAPPED TREES IN AND AROUND THE COMMUNITY OF BELTAMI AND DISMANTLED A METAL WRAPPED POLESHED. PEAK WINDS ESTIMATED TO 105 MPH. MAXIMUM WIDTH ESTIMATED TO 100 YARDS.
NWS Tornado Report Location: 3 NNE Lockhart, MN
UNK category
Sep 21, 2017
12:46 AM UTC
Tornado report for September 21, 2017
Spink County · 2,446 Homes in County
Tornado Report Description: A TORNADO WITH WINDS ESTIMATED AT 100 MPH TOUCHED DOWN 5.5 MILES SOUTH SOUTHWEST OF TULARE AND TRAVELED 2.9 MILES TO THE NORTH NORTHEAST. NUMEROUS TREES WERE DAMAGED AT A RESIDENCE... ALONG WITH AN OUTBUILDING AND CROP DAMAGE. AN IRRIGATION UNIT WAS ALSO TIPPED OVER. THE DURATION OF THE TORNADO EVENT WAS 11 MINUTES.
NWS Tornado Report Location: 3 WNW Spottswood, SD
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 September 21, 2017 on the Interactive Map

Report type
Hail
Wind
Tornado

Get a Remote Hail Inspection

Not sure if hail may have affected your home on September 21, 2017? 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 September 21, 2017?

Our records show 5 hail, 27 wind, and 2 tornado reports on September 21, 2017, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on September 21, 2017.

What was the largest hail reported on September 21, 2017?

The largest hail size in these storm-report records on September 21, 2017 is 1.25″, reported near Appleton, WI.

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 September 21, 2017 — 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 September 21, 2017 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 September 21, 2017?

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 September 21, 2017 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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