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NOAA/NWS STORM PREDICTION CENTER REPORTS + U.S. CENSUS DATA

Hail, Wind & Tornado Reports in and near Griswold, IA

Public hail, wind, and tornado reports in and near Griswold, IA from May 25, 1984 through June 11, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 55401 — search hail, wind and tornado public reports for any U.S. ZIP code 
Hail Reports
23
Wind Reports
27
Tornado Reports
5
Max Hail Size
1.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  Griswold, IA · 1984–present Updated  Daily · last Jun 11, 2026

Latest NWS Hail Reports in and near Griswold, IA

23 reports
Free hail report for your home →
1.50″ hail
Jun 16, 2025
1:55 AM UTC
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: Largest hail to ping pong ball sized.
NWS Hail Report Location: Griswold, IA
1.75″ hail
Sep 18, 2022
1:58 AM UTC
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Griswold, IA
1.50″ hail
Jun 3, 2014
4:22 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: Winds of 50 MPH and small branches blown down.
NWS Hail Report Location: 1.05 N Griswold, IA
1.00″ hail
Mar 29, 2012
7:10 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 2.81 S Griswold, IA
1.00″ hail
Mar 22, 2011
4:05 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 2.81 S Griswold, IA
1.50″ hail
Sep 19, 2010
12:36 AM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: Quarter to ping pong ball size hail reported by a trained spotter.
NWS Hail Report Location: 1.71 ESE Griswold, IA
0.88″ hail
Apr 29, 2010
7:40 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1.48 SSE Griswold, IA
1.00″ hail
Apr 29, 2010
7:39 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: Quarter size hail, combined with 50 MPH winds was reported.
NWS Hail Report Location: .52 E Griswold, IA
0.88″ hail
Apr 29, 2010
7:38 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: .86 SE Griswold, IA
0.75″ hail
Sep 23, 2008
8:59 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: Mostly dime size hail with some up to penny size.
NWS Hail Report Location: 1 SE Griswold, IA
0.88″ hail
Jun 20, 2008
5:04 PM CST-6
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 NE Griswold, IA
0.88″ hail
Apr 15, 2006
7:30 PM CST
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1 NW Griswold, IA
1.00″ hail
May 4, 2003
4:35 PM CST
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1 W Griswold, IA
1.00″ hail
Jun 1, 2001
1:57 PM CST
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1 S Griswold, IA
1.00″ hail
May 13, 2001
6:45 AM CST
Hail report for Griswold, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Griswold, IA
Showing 15 of 23
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.

Latest NWS Wind Reports in and near Griswold, IA

27 reports
Free hail report + wind check →
65 mph
Jun 11, 2026
11:18 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: Measured from personal weather station.
NWS Wind Report Location: Griswold, IA
59 mph
Jun 6, 2026
4:10 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: Measured from personal weather station.
NWS Wind Report Location: 7 SE Griswold, IA
65 mph
Jun 6, 2026
4:01 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: Measured from personal weather station.
NWS Wind Report Location: Griswold, IA
58 mph
Jul 8, 2025
4:24 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: PWS.
NWS Wind Report Location: 5 SE Griswold, IA
69 mph
Mar 14, 2025
9:59 PM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: delayed report.
NWS Wind Report Location: 9 ESE Griswold, IA
UNK mph
Jun 15, 2022
5:54 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: REPORT OF LARGE TREE ON VEHICLE. TIME ESTIMATE VIA RADAR.
NWS Wind Report Location: Griswold, IA
UNK mph
Jun 10, 2020
2:45 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: CORRECTS PREVIOUS TSTM WND DMG REPORT FROM GRISWOLD FOR TIME TO PM. SPOTTER REPORTS MULTIPLE TREES DOWN... INCLUDING AT LEAST ONE ON HOUSE... AND ROOF OFF A FARM BUILDING. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: Griswold, IA
65 mph
Jun 10, 2020
2:37 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: 60 TO 70 MPH WIND GUSTS IN GRISWOLD.
NWS Wind Report Location: Griswold, IA
UNK mph
Jun 9, 2020
2:45 PM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: SPOTTER REPORTS MULTIPLE TREES DOWN... INCLUDING AT LEAST ONE ON HOUSE... AND ROOF OFF A FARM BUILDING. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: Griswold, IA
60 mph
Jun 17, 2017
2:01 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Griswold, IA
UNK mph
Jun 17, 2017
1:50 AM UTC
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: BROKEN TREE BRANCHES ACROSS TOWN ALONG WITH POWER OUTAGES.
NWS Wind Report Location: Griswold, IA
60 mph
Apr 29, 2010
7:41 PM CST-6
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: Pea size hail combined with the wind.
NWS Wind Report Location: .52 E Griswold, IA
60 mph
Apr 29, 2010
7:38 PM CST-6
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: Nickel size hail also fell with the high winds.
NWS Wind Report Location: 1 S Griswold, IA
60 mph
Aug 9, 2009
3:00 PM CST-6
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: High winds and heavy rain.
NWS Wind Report Location: 1.48 NNW Griswold, IA
58 mph
Aug 6, 2007
7:50 PM CST-6
Wind report for Griswold, IA
Cass County · 5,130 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: .52 E Griswold, IA
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.

Latest NWS Tornado Reports in and near Griswold, IA

5 reports
EF2 category
May 6, 2007
1:40 AM CST-6
Tornado report for Griswold, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Tornado touched down on the southern Cass County line and moved northeast. The last 2 miles of the track showed an intermittent nature. Average path width was 100 to 200 yards wide with a maximum width of about one half mile. Estimated wind speed was 120 to 130 MPH.
NWS Tornado Report Location: 9.35 ESE Griswold, IA
F1 category
Jun 23, 1985
4:12 PM CST
Tornado report for Griswold, IA
Cass County · 5,130 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, IA
F0 category
Jun 23, 1985
4:06 PM CST
Tornado report for Griswold, IA
Cass County · 5,130 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, IA
F0 category
Jun 23, 1985
3:49 PM CST
Tornado report for Griswold, IA
Cass County · 5,130 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, IA
F2 category
Jun 7, 1984
3:43 PM CST
Tornado report for Griswold, IA
Cass County · 5,130 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, IA
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 in and near Griswold, IA on the Interactive Map

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Browse ZIP Codes with NWS Storm Reports in Griswold

51535 76
Griswold, IA Hail, wind & tornado reports

NWS Storm Reports & Census Data

U.S. Census Data · City

Griswold, IA area census snapshot

People & households
Population1,020
Households430
Housing units485
Income
Median household income$61,167
$100k+ households32.8%
$150k+ households8.8%
Housing stock
Single-family detached442
Attached single-family8
Small multifamily12
Large multifamily8
Mobile homes15
Housing mix
Single-family share91.1%
Attached-home share1.7%
Multifamily share4.1%
Mobile-home share3.1%
Ownership & occupancy
Owner-occupied346
Renter-occupied84
Vacant units55
Home value & age
Median home value$89,400
Owner homes $300k+1.7%
Owner homes $500k+0.9%
Owner homes $750k+--
Median year built1938
Older-home share87.2%
Vehicle context
Households with cars414
Free hail maps

This snapshot is for local area context only and describes the selected state, county, city, or ZIP area — not a specific home or property. For ZIP-level estimated hail impact, use Free Hail Maps to generate a hail report with key impact details for that ZIP.

Frequently asked questions

for homeowners, buyers & sellers
How many hail, wind, and tornado reports does Griswold have on record?

Our records show 23 hail, 27 wind, and 5 tornado reports in and near Griswold, IA, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on June 11, 2026.

What is the largest hail ever reported in Griswold?

The largest hail size in these storm-report records in and near Griswold, IA is 1.75″. It was reported near Griswold, IA on September 18, 2022.

A storm report showed up near my home in Griswold — does that mean my roof is damaged?

Not necessarily. A storm report only means hail, wind, or a tornado was observed nearby; it does not confirm damage at any specific address, and conditions change from block to block. Check an address-level hail report first, and if it looks significant, find a local pro that serves Griswold and ask about a Remote Hail Inspection before anyone climbs on the roof.

I am buying a home in Griswold — why should I look at its storm history?

Recent hail or wind can leave a roof or exterior with damage that is easy to miss during a walkthrough, and a recent roof replacement is sometimes an insurance job after a storm. Reviewing the storm history for a Griswold address before closing helps you ask informed questions about roof age, past repairs, and any prior claims.

I am selling a home in Griswold — how does this help me?

Knowing the storm history for your address lets you answer buyer questions with confidence, document repairs you have already made, and decide whether a pre-listing roof check is worthwhile. A clear hail history removes a common sticking point during negotiations.

How do I check hail history for a specific Griswold address?

Use the address search to pull a free address-level hail report for any property in Griswold — 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 across Griswold, IA, sourced from NOAA SPC and NWS Local Storm Reports. They show where hail, wind, or tornado activity was reported in Griswold, 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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