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NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports in August 1970

Public hail, wind, and tornado reports across the United States in August 1970 from August 1, 1970 through August 31, 1970, 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
39
Wind Reports
169
Tornado Reports
55
Max Hail Size
2.00″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · August 1970 · 1970–present Updated  Daily · last Aug 31, 1970

NWS Hail Reports in August 1970

30 reports
Free hail report for your home →
1.50″ hail
Aug 30, 1970
3:45 PM CST
Hail report for August 1970
Lander County · 1,066 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, NV
1.75″ hail
Aug 28, 1970
9:00 AM CST
Hail report for August 1970
St. Lawrence County · 37,084 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, NY
1.00″ hail
Aug 27, 1970
7:00 PM CST
Hail report for August 1970
Jefferson County · 8,914 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, ID
1.75″ hail
Aug 26, 1970
4:35 PM CST
Hail report for August 1970
Ozaukee County · 26,042 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, WI
1.00″ hail
Aug 26, 1970
4:15 PM CST
Hail report for August 1970
Saginaw County · 65,438 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, MI
0.75″ hail
Aug 26, 1970
3:05 PM CST
Hail report for August 1970
Piscataquis County · 11,963 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, ME
0.75″ hail
Aug 24, 1970
8:40 PM CST
Hail report for August 1970
Dickey County · 1,972 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, ND
1.75″ hail
Aug 21, 1970
5:50 PM CST
Hail report for August 1970
Towner County · 1,036 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, ND
1.75″ hail
Aug 21, 1970
2:00 AM CST
Hail report for August 1970
Albany County · 71,579 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, NY
1.75″ hail
Aug 20, 1970
6:15 PM CST
Hail report for August 1970
Quay County · 3,848 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, NM
0.75″ hail
Aug 20, 1970
4:55 PM CST
Hail report for August 1970
St. Lawrence County · 37,084 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, NY
2.00″ hail
Aug 20, 1970
3:10 PM CST
Hail report for August 1970
Niagara County · 68,048 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, NY
1.75″ hail
Aug 19, 1970
11:15 AM CST
Hail report for August 1970
Butler County · 112,735 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, OH
1.75″ hail
Aug 19, 1970
11:15 AM CST
Hail report for August 1970
Butler County · 112,735 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, OH
1.75″ hail
Aug 18, 1970
12:15 AM CST
Hail report for August 1970
Union County · 4,414 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Not provided, IA
Showing 15 of 30
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 in August 1970

30 reports
Free hail report + wind check →
59 mph
Aug 31, 1970
10:06 PM CST
Wind report for August 1970
Park County · 7,261 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, MT
UNK mph
Aug 31, 1970
5:00 PM CST
Wind report for August 1970
Bingham County · 13,198 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, ID
UNK mph
Aug 30, 1970
9:10 PM CST
Wind report for August 1970
Cortland County · 13,319 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, NY
UNK mph
Aug 30, 1970
8:15 PM CST
Wind report for August 1970
Ontario County · 35,033 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, NY
59 mph
Aug 30, 1970
8:10 PM CST
Wind report for August 1970
Elmore County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, ID
UNK mph
Aug 30, 1970
7:35 PM CST
Wind report for August 1970
Cattaraugus County · 28,006 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, NY
UNK mph
Aug 30, 1970
7:00 PM CST
Wind report for August 1970
Chautauqua County · 45,688 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, NY
69 mph
Aug 30, 1970
6:30 PM CST
Wind report for August 1970
Ashtabula County · 35,714 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, OH
UNK mph
Aug 30, 1970
6:30 PM CST
Wind report for August 1970
Chautauqua County · 45,688 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, NY
UNK mph
Aug 30, 1970
6:20 PM CST
Wind report for August 1970
Erie County · 258,563 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, NY
UNK mph
Aug 30, 1970
5:45 PM CST
Wind report for August 1970
Jefferson County · 17,142 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, PA
UNK mph
Aug 30, 1970
4:45 PM CST
Wind report for August 1970
Venango County · 20,568 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, PA
UNK mph
Aug 30, 1970
4:35 PM CST
Wind report for August 1970
Cambria County · 47,868 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, PA
UNK mph
Aug 30, 1970
12:00 PM CST
Wind report for August 1970
Erie County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, PA
UNK mph
Aug 29, 1970
4:00 PM CST
Wind report for August 1970
Walsh County · 3,971 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Not provided, ND
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 in August 1970

30 reports
UNK category
Aug 31, 1970
10:00 PM CST
Tornado report for August 1970
Tarrant County · 542,416 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, TX
F1 category
Aug 30, 1970
9:30 PM CST
Tornado report for August 1970
Tioga County · 15,567 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, PA
F1 category
Aug 30, 1970
5:30 PM CST
Tornado report for August 1970
Jefferson County · 17,142 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, PA
F1 category
Aug 30, 1970
4:30 PM CST
Tornado report for August 1970
Cambria County · 47,868 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, PA
F1 category
Aug 30, 1970
3:15 PM CST
Tornado report for August 1970
Butler County · 60,115 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, PA
F2 category
Aug 29, 1970
6:35 PM CST
Tornado report for August 1970
Ransom County · 1,964 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, ND
F1 category
Aug 29, 1970
6:00 PM CST
Tornado report for August 1970
Barnes County · 3,962 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, ND
F1 category
Aug 29, 1970
4:00 PM CST
Tornado report for August 1970
McLennan County · 71,932 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, TX
F2 category
Aug 28, 1970
9:00 PM CST
Tornado report for August 1970
Bristol County · 127,671 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, MA
F2 category
Aug 25, 1970
7:30 PM CST
Tornado report for August 1970
Lafayette County · 1,905 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, FL
UNK category
Aug 24, 1970
5:30 PM CST
Tornado report for August 1970
Maverick County · 13,652 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, TX
F1 category
Aug 24, 1970
4:45 PM CST
Tornado report for August 1970
Jefferson County · 77,430 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, TX
F0 category
Aug 24, 1970
3:15 PM CST
Tornado report for August 1970
Kleberg County · 9,082 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, TX
F1 category
Aug 24, 1970
2:30 PM CST
Tornado report for August 1970
Brooks County · 2,928 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, TX
F0 category
Aug 23, 1970
8:40 PM CST
Tornado report for August 1970
Bee County · 7,476 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, TX
Showing 15 of 30
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 in August 1970 on the Interactive Map

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Hail
Wind
Tornado

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Browse NWS Storm Reports by Day in August 1970

August 31, 1970 3
Hail, wind & tornado reports
August 30, 1970 17
Hail, wind & tornado reports
August 29, 1970 7
Hail, wind & tornado reports
August 28, 1970 5
Hail, wind & tornado reports
August 27, 1970 1
Hail, wind & tornado reports
August 26, 1970 5
Hail, wind & tornado reports
August 25, 1970 2
Hail, wind & tornado reports
August 24, 1970 5
Hail, wind & tornado reports
August 23, 1970 5
Hail, wind & tornado reports
August 22, 1970 5
Hail, wind & tornado reports
August 21, 1970 9
Hail, wind & tornado reports
August 20, 1970 15
Hail, wind & tornado reports
August 19, 1970 10
Hail, wind & tornado reports
August 18, 1970 17
Hail, wind & tornado reports
August 17, 1970 17
Hail, wind & tornado reports

Get a Remote Hail Inspection

Not sure if hail may have affected your home in August 1970? 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 in August 1970?

Our records show 39 hail, 169 wind, and 55 tornado reports in August 1970, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on August 31, 1970.

What was the largest hail reported in August 1970?

The largest hail size in these storm-report records in August 1970 is 2.00″, reported near Lockport, NY.

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 in August 1970 — 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 in August 1970 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 in August 1970?

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 in August 1970 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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