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

Hail, Wind & Tornado Reports in Cass County, IA

Public hail, wind, and tornado reports across Cass County, IA from May 29, 1956 through September 6, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 50022 — search hail, wind and tornado public reports for any U.S. ZIP code 
Hail Reports
178
Wind Reports
207
Tornado Reports
36
Max Hail Size
3.00″
Source  NOAA SPC · NWS Local Storm Reports Coverage  Cass County, IA · 1956–present Updated  Daily · last Sep 6, 2026

Latest NWS Hail Reports in Cass County

30 reports
Free hail report for your home →
1.00″ hail
Sep 6, 2026
8:31 PM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: Pea to quarter sized hail north of Atlantic. Time estimated from radar.
NWS Hail Report Location: 2 N Atlantic, IA
1.50″ hail
Jun 6, 2026
4:18 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: Reports of power flashes and ping pong ball sized hail south of Massena.
NWS Hail Report Location: 3 S Massena, IA
1.00″ hail
Jun 6, 2026
4:00 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: Report of quarter size hail south of Massena relayed via Chat.
NWS Hail Report Location: 4 S Massena, IA
1.00″ hail
Mar 31, 2026
1:41 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 6 ENE Marne, IA
1.50″ hail
Jun 16, 2025
1:55 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: Largest hail to ping pong ball sized.
NWS Hail Report Location: Griswold, IA
1.00″ hail
Apr 18, 2025
1:22 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Lewis, IA
1.00″ hail
May 21, 2024
8:10 PM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 S Cumberland, IA
2.00″ hail
Apr 30, 2024
9:37 PM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: delayed report.
NWS Hail Report Location: 6 SW Massena, IA
1.75″ hail
Sep 18, 2022
1:58 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Griswold, IA
1.00″ hail
Apr 25, 2022
10:35 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: DELAYED REPORT FROM MARNE FD. HAIL JUST OVER 1 INCH DIAMETER. TIME ESTIMATED BY RADAR.
NWS Hail Report Location: 4 NW Marne, IA
1.25″ hail
Jun 19, 2021
4:32 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: QUARTER TO HALF DOLLAR SIZED HAIL AT KJAN STUDIOS.
NWS Hail Report Location: 1 NNE Atlantic, IA
2.00″ hail
Sep 1, 2018
3:27 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Marne, IA
1.00″ hail
Sep 1, 2018
3:21 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: A FEW QUARTERS WITH A LOT OF PEA SIZE HAIL.
NWS Hail Report Location: Marne, IA
1.00″ hail
May 1, 2018
8:56 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: VIA MPING.
NWS Hail Report Location: 3 N Marne, IA
1.00″ hail
Jun 16, 2017
12:22 AM UTC
Hail report for Cass County, IA
Cass County · 5,130 Homes in County
Hail Report Description: TIME ESTIMATED BY RADAR.
NWS Hail Report Location: 4 WSW Cumberland, 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.

Latest NWS Wind Reports in Cass County

30 reports
Free hail report + wind check →
UNK mph
Jun 11, 2026
11:30 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Delayed report - time estimated by radar. Received photo from trained spotter of tree limb down.
NWS Wind Report Location: 3 WNW Anita, IA
UNK mph
Jun 11, 2026
11:24 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: NWS COOPERATIVE WEATHER OBSERVER REPORTS THUNDERSTORM WINDS LIFTED THE STAINLESS STEEL RAIN GAGE OUT OF ITS HOLDER AND TOSSED IT AROUND 30 FT AWAY. TIME ESTIMATED FROM RADAR.
NWS Wind Report Location: 1 NNE Atlantic, IA
65 mph
Jun 11, 2026
11:18 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Measured from personal weather station.
NWS Wind Report Location: Griswold, IA
UNK mph
Jun 11, 2026
11:15 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Several reports of trees and power poles down across Atlantic found on social media. Time estimated from radar.
NWS Wind Report Location: Atlantic, IA
59 mph
Jun 6, 2026
4:10 AM UTC
Wind report for Cass County, 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 Cass County, 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 Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: PWS.
NWS Wind Report Location: 5 SE Griswold, IA
UNK mph
Jun 23, 2025
10:05 PM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Numerous large tree limbs down up to 4 inches in diameter. Relayed by KJAN radio.
NWS Wind Report Location: Atlantic, IA
UNK mph
Jun 17, 2025
2:08 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Strong wind gusts reported in Atlantic... with medium to large sized tree branches down blocking multiple roads. Pea-sized hail was observed at times... with heavy rain causing near zero visibility.
NWS Wind Report Location: Atlantic, IA
UNK mph
Apr 29, 2025
2:04 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Branches down. Hail to the size of nickels.
NWS Wind Report Location: 3 W Anita, IA
69 mph
Mar 14, 2025
9:59 PM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: delayed report.
NWS Wind Report Location: 9 ESE Griswold, IA
59 mph
Aug 1, 2024
12:08 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: AWOS station KAIO Atlantic Airport. Gusts over 50 mph for at least 10 minutes.
NWS Wind Report Location: 2 WNW Atlantic, IA
61 mph
May 24, 2024
8:45 AM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: PWS KIAGRISW2.
NWS Wind Report Location: 8 SW Cumberland, IA
UNK mph
May 21, 2024
12:19 PM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Numerous power poles and branches down throughout town. Time estimated. Delayed report.
NWS Wind Report Location: Lewis, IA
59 mph
May 7, 2024
11:31 PM UTC
Wind report for Cass County, IA
Cass County · 5,130 Homes in County
Wind Report Description: Time estimated.
NWS Wind Report Location: 2 WNW Atlantic, IA
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.

Latest NWS Tornado Reports in Cass County

30 reports
UNK category
Jun 29, 2024
1:46 AM UTC
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Brief tornado southwest of Wiota.
NWS Tornado Report Location: 2 SW Wiota, IA
UNK category
Jun 29, 2024
12:58 AM UTC
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Another small rope south of Marne.
NWS Tornado Report Location: 3 W Atlantic, IA
UNK category
Jun 29, 2024
12:49 AM UTC
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Rope tornado reported west of Atlantic.
NWS Tornado Report Location: 4 SSW Marne, IA
UNK category
Dec 15, 2021
11:02 PM UTC
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: STORM CHASER REPORTED TORNADO ON THE WEST SIDE OF ATLANTIC.
NWS Tornado Report Location: 1 NW Atlantic, IA
UNK category
Dec 15, 2021
11:01 PM UTC
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: STORM CHASER REPORTED FLIPPED SEMIS ON I-80 AND POWER FLASHES ASSOCIATED WITH A TORNADO.
NWS Tornado Report Location: 3 SSW Brayton, IA
UNK category
Jul 16, 2019
7:40 PM UTC
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: 8 SE Atlantic, IA
UNK category
May 22, 2019
6:04 AM UTC
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: EF-1 TORNADO DESTROYED OLD BARN ALONG GLENDALE ROAD SCATTERING DEBRIS DOWNSTREAM. PATH LENGTH WAS JUST OVER 1 MILE WITH DURATION OF 104 AM TO 106 AM.
NWS Tornado Report Location: 3 SSE Anita, IA
EF1 category
Mar 22, 2011
4:30 PM CST-6
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: NWS storm survey term related this tornado as an EF1 with a peak wind of 89 MPH. Track was continuous 2 3/4 mile path. Most damage was EF0 with one localized EF1 damage area.
NWS Tornado Report Location: 1.61 NE Dewey, IA
EF0 category
Jun 7, 2009
4:17 PM CST-6
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: A brief landspout touchdown with no damage.
NWS Tornado Report Location: 2.65 W Anita Muni Arpt, IA
EF0 category
Mar 23, 2009
7:23 PM CST-6
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Minor damage occurred to outbuildings.
NWS Tornado Report Location: 1.4 NNE Norway Center, IA
EF0 category
Mar 23, 2009
7:10 PM CST-6
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Several farms had damage to grain bins, out buildings, trees, and powerlines. Track was intermittent.
NWS Tornado Report Location: 3.98 SW Cumberland, IA
EF0 category
Jun 5, 2008
7:12 PM CST-6
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Relayed public report of brief touchdown.
NWS Tornado Report Location: 1.22 N Cumberland, IA
EF2 category
May 6, 2007
1:40 AM CST-6
Tornado report for Cass County, 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
May 8, 2004
8:25 PM CST
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: Intermittent path through rural areas.
NWS Tornado Report Location: 3 E Lewis, IA
F0 category
May 18, 2000
9:58 AM CST
Tornado report for Cass County, IA
Cass County · 5,130 Homes in County
Tornado Report Description: In open country, little damage.
NWS Tornado Report Location: 1 S Anita, IA
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 Cass County on the Interactive Map

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Wind
Tornado

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Browse Cities with NWS Storm Reports in Cass County

Atlantic, IA 147
Hail, wind & tornado reports
Griswold, IA 55
Hail, wind & tornado reports
Anita, IA 43
Hail, wind & tornado reports
Massena, IA 43
Hail, wind & tornado reports
Cumberland, IA 38
Hail, wind & tornado reports
Lewis, IA 31
Hail, wind & tornado reports
Marne, IA 30
Hail, wind & tornado reports
Wiota, IA 21
Hail, wind & tornado reports

NWS Storm Reports & Census Data

U.S. Census Data · County

Cass County, IA area census snapshot

People & households
Population13,115
Households5,789
Housing units6,397
Income
Median household income$61,657
$100k+ households34.9%
$150k+ households11.2%
Housing stock
Single-family detached5,130
Attached single-family68
Small multifamily629
Large multifamily401
Mobile homes168
Housing mix
Single-family share80.2%
Attached-home share1.1%
Multifamily share16.1%
Mobile-home share2.6%
Ownership & occupancy
Owner-occupied4,184
Renter-occupied1,605
Vacant units608
Home value & age
Median home value$133,300
Owner homes $300k+15.6%
Owner homes $500k+4.5%
Owner homes $750k+1.6%
Median year built1954
Older-home share80.7%
Vehicle context
Households with cars5,444
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.

Top ZIP Codes with NWS Storm Reports in Cass County

50022 169
Atlantic, IA Hail, wind & tornado reports
51535 76
Griswold, IA Hail, wind & tornado reports
50864 53
Villisca, IA Hail, wind & tornado reports
50020 45
Anita, IA Hail, wind & tornado reports
50853 43
Massena, IA Hail, wind & tornado reports
50837 40
Bridgewater, IA Hail, wind & tornado reports
50843 37
Cumberland, IA Hail, wind & tornado reports
51577 37
Walnut, IA Hail, wind & tornado reports
51532 33
Elliott, IA Hail, wind & tornado reports
51544 28
Lewis, IA Hail, wind & tornado reports
51552 25
Marne, IA Hail, wind & tornado reports
50274 20
Wiota, IA Hail, wind & tornado reports
50042 11
Brayton, IA Hail, wind & tornado reports

Get a Remote Hail Inspection

Not sure if hail may have affected your home in Cass County? 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 hail, wind, and tornado reports does Cass County have on record?

Our records show 178 hail, 207 wind, and 36 tornado reports in Cass County, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on September 6, 2026.

What is the largest hail ever reported in Cass County?

The largest hail size in these storm-report records in Cass County is 3.00″. It was reported near Massena Swain Arpt, IA on September 18, 2010.

A storm report showed up near my home in Cass County — 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 Cass County and ask about a Remote Hail Inspection before anyone climbs on the roof.

I am buying a home in Cass County — 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 Cass County address before closing helps you ask informed questions about roof age, past repairs, and any prior claims.

I am selling a home in Cass County — 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 Cass County address?

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