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HailGeeks
NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports on August 4, 2001

Public hail, wind, and tornado reports across the United States on August 4, 2001 from August 4, 2001 through August 4, 2001, 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
18
Tornado Reports
0
Max Hail Size
1.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · August 4, 2001 · 2001–present Updated  Daily · last Aug 4, 2001

NWS Hail Reports on August 4, 2001

16 reports
Free hail report for your home →
1.00″ hail
Aug 4, 2001
6:35 PM EST
Hail report for August 4, 2001
Montgomery County · 186,982 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Telford, PA
0.75″ hail
Aug 4, 2001
4:00 PM MST
Hail report for August 4, 2001
Cascade County · 26,463 Homes in County
Hail Report Description: Actual spotter location Belt 6 E.
NWS Hail Report Location: Belt, MT
1.75″ hail
Aug 4, 2001
3:52 PM MST
Hail report for August 4, 2001
Santa Cruz County · 13,327 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 5 N Rio Rico, AZ
0.75″ hail
Aug 4, 2001
2:40 PM MST
Hail report for August 4, 2001
Cascade County · 26,463 Homes in County
Hail Report Description: Actual event location Cascade 22 SE.
NWS Hail Report Location: Cascade, MT
0.75″ hail
Aug 4, 2001
2:40 PM MST
Hail report for August 4, 2001
Judith Basin County · 1,053 Homes in County
Hail Report Description: Actual event location Raynesford 6 N (or Belt 6 SE) along Judith Basin/Cascade county line.
NWS Hail Report Location: Raynesford, MT
1.00″ hail
Aug 4, 2001
2:22 PM MST
Hail report for August 4, 2001
Lewis and Clark County · 22,448 Homes in County
Hail Report Description: Actual spotter location Helena 12 NE.
NWS Hail Report Location: Helena, MT
0.75″ hail
Aug 4, 2001
4:00 PM EST
Hail report for August 4, 2001
Alleghany County · 6,109 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Callaghan, VA
0.75″ hail
Aug 4, 2001
1:44 PM MST
Hail report for August 4, 2001
Jefferson County · 4,508 Homes in County
Hail Report Description: Dime sized hail reported by spotter in the town of Boulder.
NWS Hail Report Location: Boulder, MT
1.75″ hail
Aug 4, 2001
1:30 PM MST
Hail report for August 4, 2001
Jefferson County · 4,508 Homes in County
Hail Report Description: Reported by general public at campground at Basin 14 SW...Golf ball sized hail accumulated to 4 inches deep.
NWS Hail Report Location: Basin, MT
1.50″ hail
Aug 4, 2001
12:55 PM MST
Hail report for August 4, 2001
Silver Bow County · 12,594 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 5 NW Butte, MT
0.88″ hail
Aug 4, 2001
12:50 PM MST
Hail report for August 4, 2001
Lewis and Clark County · 22,448 Homes in County
Hail Report Description: Actual spotter location Helena 10 N.
NWS Hail Report Location: Helena, MT
1.00″ hail
Aug 4, 2001
12:31 PM MST
Hail report for August 4, 2001
Lewis and Clark County · 22,448 Homes in County
Hail Report Description: Former NWS employee reported 1 inch diameter hail in the city of Helena.
NWS Hail Report Location: Helena, MT
0.75″ hail
Aug 4, 2001
12:28 PM MST
Hail report for August 4, 2001
Deer Lodge County · 4,282 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 W Anaconda, MT
1.50″ hail
Aug 4, 2001
12:20 PM MST
Hail report for August 4, 2001
Lewis and Clark County · 22,448 Homes in County
Hail Report Description: NWS off-duty employee reported 1 1/2 inch diameter hail in the city of Helena.
NWS Hail Report Location: Helena, MT
0.88″ hail
Aug 4, 2001
12:17 PM MST
Hail report for August 4, 2001
Beaverhead County · 3,534 Homes in County
Hail Report Description: Actual spotter location Wise River 3 W...0.23 inches of rain also fell in less than 5 minutes.
NWS Hail Report Location: Wise River, MT
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 4, 2001

18 reports
Free hail report + wind check →
69 mph
Aug 4, 2001
7:45 PM MST
Wind report for August 4, 2001
Pinal County · 136,257 Homes in County
Wind Report Description: Severe thunderstorm wind gusts blew down trees in town.
NWS Wind Report Location: Superior, AZ
58 mph
Aug 4, 2001
6:50 PM EST
Wind report for August 4, 2001
Camden County · 116,355 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Pennsauken, NJ
67 mph
Aug 4, 2001
4:29 PM MST
Wind report for August 4, 2001
Lemhi County · 3,454 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: 5 NE Leadore, ID
58 mph
Aug 4, 2001
6:05 PM EST
Wind report for August 4, 2001
Bucks County · 163,752 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Croyden, PA
58 mph
Aug 4, 2001
5:34 PM EST
Wind report for August 4, 2001
Franklin County · 45,640 Homes in County
Wind Report Description: Trees were reported down in Amberson.
NWS Wind Report Location: Amberson, PA
UNK mph
Aug 4, 2001
5:30 PM EST
Wind report for August 4, 2001
Albany County · 71,579 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Altamont, NY
60 mph
Aug 4, 2001
3:20 PM MST
Wind report for August 4, 2001
Meagher County · 1,168 Homes in County
Wind Report Description: Actual event location White Sulphur Springs 22 NW...Estimated 52 kt winds damaged window screens by tearing them out of windows.
NWS Wind Report Location: White Sulphur Spgs, MT
60 mph
Aug 4, 2001
3:15 PM MST
Wind report for August 4, 2001
Broadwater County · 2,619 Homes in County
Wind Report Description: Peak wind gust estimated at least 60 mph as Agrimet automated station reported 57 mph winds averaged over 15 minutes.
NWS Wind Report Location: Toston, MT
58 mph
Aug 4, 2001
4:50 PM EST
Wind report for August 4, 2001
Lancaster County · 120,566 Homes in County
Wind Report Description: Trees were reported down in Marietta.
NWS Wind Report Location: Marietta Afs, PA
58 mph
Aug 4, 2001
4:40 PM EST
Wind report for August 4, 2001
Dauphin County · 63,287 Homes in County
Wind Report Description: Trees were reported down in Millersburg.
NWS Wind Report Location: Millersburg, PA
58 mph
Aug 4, 2001
4:30 PM EST
Wind report for August 4, 2001
Lancaster County · 120,566 Homes in County
Wind Report Description: Trees were reported down in Manheim.
NWS Wind Report Location: Manheim, PA
58 mph
Aug 4, 2001
4:20 PM EST
Wind report for August 4, 2001
Dauphin County · 63,287 Homes in County
Wind Report Description: Trees were reported down in Elizabethville.
NWS Wind Report Location: Elizabethville, PA
58 mph
Aug 4, 2001
4:15 PM EST
Wind report for August 4, 2001
Lancaster County · 120,566 Homes in County
Wind Report Description: Trees were reported down in Lititz.
NWS Wind Report Location: Lititz, PA
58 mph
Aug 4, 2001
4:00 PM EST
Wind report for August 4, 2001
Cumberland County · 65,680 Homes in County
Wind Report Description: Trees were reported down in Carlisle.
NWS Wind Report Location: Carlisle, PA
58 mph
Aug 4, 2001
3:35 PM EST
Wind report for August 4, 2001
Sussex County · 49,114 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Augusta, NJ
Showing 15 of 18
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 4, 2001

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 4, 2001 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 4, 2001? 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 4, 2001?

Our records show 16 hail, 18 wind, and 0 tornado reports on August 4, 2001, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 4, 2001.

What was the largest hail reported on August 4, 2001?

The largest hail size in these storm-report records on August 4, 2001 is 1.75″, reported near Rio Rico, AZ.

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 4, 2001 — 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 4, 2001 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 4, 2001?

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 4, 2001 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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