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

Hail, Wind & Tornado Reports in Grundy County, IA

Public hail, wind, and tornado reports across Grundy County, IA from April 16, 1960 through July 20, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 50613 — search hail, wind and tornado public reports for any U.S. ZIP code 
Hail Reports
91
Wind Reports
128
Tornado Reports
36
Max Hail Size
3.00″
Source  NOAA SPC · NWS Local Storm Reports Coverage  Grundy County, IA · 1960–present Updated  Daily · last Jul 20, 2026

Latest NWS Hail Reports in Grundy County

30 reports
Free hail report for your home →
1.00″ hail
Apr 14, 2026
9:00 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Dike, IA
1.75″ hail
Apr 14, 2026
8:40 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 1 NW Holland, IA
1.75″ hail
Apr 14, 2026
8:26 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: Report from mPING: Golf Ball (1.75 in.).
NWS Hail Report Location: 1 S Wellsburg, IA
1.00″ hail
Sep 23, 2025
1:25 AM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 2 S Dike, IA
1.00″ hail
May 20, 2024
12:10 AM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: Quarter sized hail reported in Dike. Photo and video relayed via broadcast media. Time estimated from radar.
NWS Hail Report Location: Dike, IA
1.00″ hail
Jul 28, 2023
11:48 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: Accompanied with estimated 60 mph wind gust from Wellsburg to Grundy Center area.
NWS Hail Report Location: 3 W Holland, IA
1.00″ hail
Aug 19, 2022
8:56 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: PEA AND QUARTER SIZED HAIL FALLING NORTH OF HOLLAND.
NWS Hail Report Location: 1 NNE Holland, IA
1.50″ hail
Aug 19, 2022
8:50 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: PING PONG BALL SIZED HAIL NORTH OF GRUNDY CENTER. TIME ESTIMATED FROM RADAR. REPORT FROM SOCIAL MEDIA.
NWS Hail Report Location: 1 ENE Holland, IA
1.00″ hail
Jun 15, 2022
8:00 AM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: STRONG WINDS ALSO REPORTED. RELAYED BY KWWL TV.
NWS Hail Report Location: Dike, IA
1.00″ hail
Jul 11, 2020
9:39 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 SSW Parkersburg, IA
1.00″ hail
Jun 28, 2019
12:58 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: MPING REPORT.
NWS Hail Report Location: 3 NNW Dike, IA
1.00″ hail
Aug 6, 2018
1:01 AM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: MOSTLY PEA TO NICKEL SIZED BUT A FEW STONES AS LARGE AS QUARTERS.
NWS Hail Report Location: 1 SW Grundy Center, IA
1.00″ hail
Jun 6, 2018
10:40 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: DIME TO QUARTER SIZED HAIL 5:40 TO 5:50 PM. WINDS GUSTING BETWEEN 30 AND 40 MPH.
NWS Hail Report Location: Conrad, IA
1.00″ hail
May 25, 2018
11:52 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: VIA MPING.
NWS Hail Report Location: 1 E Whitten, IA
1.00″ hail
Apr 15, 2017
11:25 PM UTC
Hail report for Grundy County, IA
Grundy County · 4,633 Homes in County
Hail Report Description: TRAINED SPOTTER REPORTED LOTS OF DIME TO QUARTER SIZED HAIL ALONG HIGHWAY 175 JUST EAST OF THE HARDIN-GRUNDY COUNTY LINE.
NWS Hail Report Location: 6 SSW Wellsburg, 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 Grundy County

30 reports
Free hail report + wind check →
UNK mph
Jul 20, 2026
9:12 PM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Medium size tree down. Time estimated via radar.
NWS Wind Report Location: Dike, IA
UNK mph
Jul 20, 2026
9:11 PM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Received report via social media of tree damage around 199th and L Ave near Dike_ IA. Time estimated from radar.
NWS Wind Report Location: 2 Nnw Holland, IA
60 mph
Jun 17, 2026
10:47 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Conrad, IA
UNK mph
Jun 17, 2026
10:47 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Large tree snapped near its base in Conrad. Time estimated via radar.
NWS Wind Report Location: Conrad, IA
UNK mph
Jun 17, 2026
10:46 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Trees blocking roads in Conrad. Time estimated via radar.
NWS Wind Report Location: Conrad, IA
UNK mph
Jul 3, 2025
11:19 PM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Six inch tree limbs broken in Grundy Center. Time estimated by radar.
NWS Wind Report Location: Grundy Center, IA
60 mph
Jul 3, 2025
11:18 PM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Personal weather station.
NWS Wind Report Location: 1 SW Grundy Center, IA
UNK mph
Jun 21, 2025
10:10 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Delayed report of trees down and hoop building damaged near 220th and B Ave.
NWS Wind Report Location: 4 ESE Steamboat Rock, IA
UNK mph
Jun 20, 2025
1:20 PM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Report of large tree split and large branches downed in Reinbeck.
NWS Wind Report Location: Reinbeck, IA
UNK mph
Jun 20, 2025
1:08 PM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Tree limbs down.
NWS Wind Report Location: Grundy Center, IA
58 mph
Jun 12, 2025
12:08 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Personal weather station.
NWS Wind Report Location: 2 N Morrison, IA
71 mph
Mar 15, 2025
12:21 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Grundy Center, IA
UNK mph
Jun 19, 2024
2:38 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Tree damage... minor building damage. small portion of roof removed from barn.
NWS Wind Report Location: 3 N Wellsburg, IA
UNK mph
May 24, 2024
10:51 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Tree and utility damage near Wellsburg. Time estimated from radar.
NWS Wind Report Location: Wellsburg, IA
UNK mph
May 9, 2024
2:10 AM UTC
Wind report for Grundy County, IA
Grundy County · 4,633 Homes in County
Wind Report Description: Branches down.
NWS Wind Report Location: Reinbeck, 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 Grundy County

30 reports
UNK category
Jun 15, 2019
7:48 PM UTC
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: POSSIBLE LANDSPOUT TORNADO REPORTED NORTHEAST OF WHITTEN AND SOUTH OF WELLSBURG VIA SOCIAL MEDIA AND HARDIN COUNTY.
NWS Tornado Report Location: 4 ENE Whitten, IA
UNK category
Nov 28, 2016
9:50 PM UTC
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: BRIEF TOUCHDOWN JUST WEST OF TOWN. HAIL REPORTED ON AREA ROAD NEEDED TO BE PLOWED. .
NWS Tornado Report Location: 1 W Grundy Center, IA
UNK category
Nov 28, 2016
9:45 PM UTC
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: 5 SW Dike, IA
EF0 category
Aug 31, 2014
8:35 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Produced only crop damage along its path. Tornado was found and rated using high resolution satellite imagery.
NWS Tornado Report Location: 7.21 NW Wellsburg, IA
EF0 category
Jul 6, 2014
7:08 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Tornado evident in photographs from the public as well as flyover satellite data. This brief segment started shortly after the Reinbeck tornado ended. The tornado moved from Grundy into Tama county. This is the first segment.
NWS Tornado Report Location: 1.64 SSE Reinbeck, IA
EF1 category
Jul 6, 2014
6:58 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Tornado touched down with a debris ball noted. Damage to homes occurred many to the southwest of Reinbeck. Numerous crops flattened.
NWS Tornado Report Location: 2.15 WNW Reinbeck, IA
EF1 category
Jun 29, 2014
7:18 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Brief tornado passed through the northern edge of Morrison.
NWS Tornado Report Location: .6 WSW Morrison, IA
EF1 category
Jun 21, 2009
6:25 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: A tornado was skipping up and down through the crops. The tornado destroyed a corrugated steel building.
NWS Tornado Report Location: 2.76 ESE Wellsburg, IA
EF1 category
Jun 21, 2009
6:20 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: A tornado touched down west of Dike and ended north of Dike. A hog containment building sustained significant damage west of Dike.
NWS Tornado Report Location: 1.14 WSW Dike, IA
EF0 category
Jun 21, 2009
5:51 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: A tornado touched down briefly southeast of Cleves.
NWS Tornado Report Location: 3.36 WNW Wellsburg, IA
EF0 category
May 25, 2008
4:07 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Iowa State storm chasers tracked a satellite tornado just south of the main EF-5 tornado. It was located in Grundy County.
NWS Tornado Report Location: 2.37 NE Stout, IA
EF2 category
May 25, 2008
3:48 PM CST-6
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: This was the initial tornado touchdown point. The tornado continued on into Butler County.
NWS Tornado Report Location: 7.53 NW Fern, IA
F0 category
May 21, 2004
2:22 PM CST
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Tornado touched down in open fields northwest of Grundy Center.
NWS Tornado Report Location: 5 NW Grundy Center, IA
F0 category
May 21, 2004
2:15 PM CST
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Tornado touched down in open areas west of Grundy Center and crossed Highway 175.
NWS Tornado Report Location: 10 W Grundy Center, IA
F0 category
May 21, 2004
1:49 PM CST
Tornado report for Grundy County, IA
Grundy County · 4,633 Homes in County
Tornado Report Description: Tornado touched down in farm fields southwest of Dike.
NWS Tornado Report Location: 7 SW Dike, 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 Grundy County on the Interactive Map

Report type
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Wind
Tornado

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Browse Cities with NWS Storm Reports in Grundy County

Grundy Center, IA 49
Hail, wind & tornado reports
Wellsburg, IA 46
Hail, wind & tornado reports
Conrad, IA 42
Hail, wind & tornado reports
Dike, IA 29
Hail, wind & tornado reports
Reinbeck, IA 27
Hail, wind & tornado reports
Holland, IA 15
Hail, wind & tornado reports
Stout, IA 13
Hail, wind & tornado reports
Beaman, IA 12
Hail, wind & tornado reports
Morrison, IA 8
Hail, wind & tornado reports

NWS Storm Reports & Census Data

U.S. Census Data · County

Grundy County, IA area census snapshot

People & households
Population12,352
Households5,085
Housing units5,489
Income
Median household income$83,617
$100k+ households48.4%
$150k+ households18.2%
Housing stock
Single-family detached4,633
Attached single-family75
Small multifamily462
Large multifamily132
Mobile homes187
Housing mix
Single-family share84.4%
Attached-home share1.4%
Multifamily share10.8%
Mobile-home share3.4%
Ownership & occupancy
Owner-occupied4,270
Renter-occupied815
Vacant units404
Home value & age
Median home value$180,500
Owner homes $300k+17.8%
Owner homes $500k+3%
Owner homes $750k+1.3%
Median year built1960
Older-home share75.6%
Vehicle context
Households with cars4,940
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 Grundy County

50613 145
Cedar Falls, IA Hail, wind & tornado reports
50627 65
Eldora, IA Hail, wind & tornado reports
50601 63
Ackley, IA Hail, wind & tornado reports
50638 56
Grundy Center, IA Hail, wind & tornado reports
50665 44
Parkersburg, IA Hail, wind & tornado reports
50669 44
Reinbeck, IA Hail, wind & tornado reports
50621 39
Conrad, IA Hail, wind & tornado reports
50604 35
Aplington, IA Hail, wind & tornado reports
50680 34
Wellsburg, IA Hail, wind & tornado reports
50624 29
Dike, IA Hail, wind & tornado reports
50643 26
Hudson, IA Hail, wind & tornado reports
50609 19
Beaman, IA Hail, wind & tornado reports
50642 18
Holland, IA Hail, wind & tornado reports
50672 17
Steamboat Rock, IA Hail, wind & tornado reports
50660 14
New Hartford, IA Hail, wind & tornado reports

Get a Remote Hail Inspection

Not sure if hail may have affected your home in Grundy 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 Grundy County have on record?

Our records show 91 hail, 128 wind, and 36 tornado reports in Grundy County, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on July 20, 2026.

What is the largest hail ever reported in Grundy County?

The largest hail size in these storm-report records in Grundy County is 3.00″. It was reported near Stout, IA on May 31, 1971.

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

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

I am selling a home in Grundy 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 Grundy County address?

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