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NOAA/NWS STORM PREDICTION CENTER STORM REPORTS

Hail, Wind & Tornado Reports on May 21, 2004

Public hail, wind, and tornado reports across the United States on May 21, 2004 from May 21, 2004 through May 21, 2004, 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
409
Wind Reports
304
Tornado Reports
25
Max Hail Size
4.25″
Source  NOAA SPC · NWS Local Storm Reports Coverage  United States · May 21, 2004 · 2004–present Updated  Daily · last May 21, 2004

NWS Hail Reports on May 21, 2004

409 reports
Free hail report for your home →
0.88″ hail
May 21, 2004
11:35 PM CST
Hail report for May 21, 2004
McHenry County · 93,296 Homes in County
Hail Report Description: Reported at the intersection of Amberwood Road and Bennington Drive.
NWS Hail Report Location: Crystal Lake, IL
0.75″ hail
May 21, 2004
11:19 PM CST
Hail report for May 21, 2004
Winnebago County · 87,192 Homes in County
Hail Report Description: Reported at American Road.
NWS Hail Report Location: Rockford, IL
0.75″ hail
May 21, 2004
11:00 PM CST
Hail report for May 21, 2004
Platte County · 10,844 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Humphrey, NE
0.88″ hail
May 21, 2004
11:00 PM CST
Hail report for May 21, 2004
Woodbury County · 31,632 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 8 S Moville, IA
0.75″ hail
May 21, 2004
10:57 PM CST
Hail report for May 21, 2004
Thurston County · 1,839 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Pender, NE
0.75″ hail
May 21, 2004
10:57 PM CST
Hail report for May 21, 2004
Hall County · 16,946 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Wood River, NE
0.88″ hail
May 21, 2004
11:50 PM EST
Hail report for May 21, 2004
Medina County · 58,429 Homes in County
Hail Report Description: Nickel size hail was observed three miles east of Medina.
NWS Hail Report Location: Medina, OH
1.75″ hail
May 21, 2004
10:42 PM CST
Hail report for May 21, 2004
Dakota County · 5,197 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 7 SW Homer, NE
0.88″ hail
May 21, 2004
10:40 PM CST
Hail report for May 21, 2004
Dixon County · 2,217 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 7 NE Wakefield, NE
1.75″ hail
May 21, 2004
10:37 PM CST
Hail report for May 21, 2004
Dixon County · 2,217 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 7 NE Wakefield, NE
1.00″ hail
May 21, 2004
10:33 PM CST
Hail report for May 21, 2004
Murray County · 3,970 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 S Iona, MN
0.75″ hail
May 21, 2004
10:31 PM CST
Hail report for May 21, 2004
Adams County · 10,059 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 W Prosser, NE
0.75″ hail
May 21, 2004
10:30 PM CST
Hail report for May 21, 2004
Boone County · 2,279 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Albion, NE
0.75″ hail
May 21, 2004
10:30 PM CST
Hail report for May 21, 2004
Murray County · 3,970 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 S Iona, MN
1.00″ hail
May 21, 2004
10:25 PM CST
Hail report for May 21, 2004
Lincoln County · 17,322 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Harrisburg, SD
Showing 15 of 409
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 May 21, 2004

304 reports
Free hail report + wind check →
58 mph
May 21, 2004
10:58 PM CST
Wind report for May 21, 2004
Lake County · 179,407 Homes in County
Wind Report Description: Power lines and numerous trees were blown down.
NWS Wind Report Location: Wauconda, IL
63 mph
May 21, 2004
10:15 PM CST
Wind report for May 21, 2004
Boone County · 2,279 Homes in County
Wind Report Description: Thunderstorm wind gusts estimated at over 60 mph overturned 9 center irrigation pivots and destroyed several grain bins north of Petersburg.
NWS Wind Report Location: 2 N Petersburg, NE
58 mph
May 21, 2004
10:40 PM EST
Wind report for May 21, 2004
Berrien County · 59,555 Homes in County
Wind Report Description: Emergency management reported trees down in Three Oaks.
NWS Wind Report Location: Three Oaks, MI
69 mph
May 21, 2004
9:27 PM CST
Wind report for May 21, 2004
Thurston County · 1,839 Homes in County
Wind Report Description: A trained spotter reported thunderstorm wind gusts estimated at around 70 mph. The winds were accompanied by golfball size hail.
NWS Wind Report Location: Pender, NE
70 mph
May 21, 2004
9:15 PM CST
Wind report for May 21, 2004
Woodbury County · 31,632 Homes in County
Wind Report Description: Thunderstorm winds caused tree damage, including three inch diameter limbs blown down.
NWS Wind Report Location: 2 NW Salix, IA
70 mph
May 21, 2004
9:00 PM CST
Wind report for May 21, 2004
Dakota County · 5,197 Homes in County
Wind Report Description: Thunderstorm winds caused tree damage, including three inch diameter limbs blown down.
NWS Wind Report Location: 2 SW Homer, NE
70 mph
May 21, 2004
8:43 PM CST
Wind report for May 21, 2004
Bremer County · 8,485 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: Waverly, IA
60 mph
May 21, 2004
9:36 PM EST
Wind report for May 21, 2004
Livingston County · 63,005 Homes in County
Wind Report Description: A trained weather spotter estimated a 60 mph thunderstorm wind gust.
NWS Wind Report Location: 6 NW Hartland, MI
58 mph
May 21, 2004
9:10 PM EST
Wind report for May 21, 2004
Alleghany County · 6,109 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: 6 N Alleghany, VA
60 mph
May 21, 2004
9:05 PM EST
Wind report for May 21, 2004
Montgomery County · 189,730 Homes in County
Wind Report Description: Trees down.
NWS Wind Report Location: Darnestown, MD
58 mph
May 21, 2004
8:05 PM CST
Wind report for May 21, 2004
McHenry County · 93,296 Homes in County
Wind Report Description: A 6-inch diameter tree limb was blown down and blocking traffic on Route 62.
NWS Wind Report Location: 2 E Algonquin, IL
63 mph
May 21, 2004
9:05 PM EST
Wind report for May 21, 2004
Augusta County · 26,351 Homes in County
Wind Report Description: Trees and power lines down.
NWS Wind Report Location: Sherando, VA
58 mph
May 21, 2004
8:50 PM EST
Wind report for May 21, 2004
Raleigh County · 25,660 Homes in County
Wind Report Description: Trees fell across power lines.
NWS Wind Report Location: Countywide, WV
60 mph
May 21, 2004
7:50 PM CST
Wind report for May 21, 2004
Bremer County · 8,485 Homes in County
Wind Report Description: No National Weather Service description provided.
NWS Wind Report Location: 1 SE Readlyn, IA
63 mph
May 21, 2004
8:40 PM EST
Wind report for May 21, 2004
Loudoun County · 74,711 Homes in County
Wind Report Description: Downed trees.
NWS Wind Report Location: Middleburg, VA
Showing 15 of 304
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 May 21, 2004

25 reports
F0 category
May 21, 2004
9:13 PM CST
Tornado report for May 21, 2004
Garfield County · 808 Homes in County
Tornado Report Description: The tornado touched down briefly over open rangeland.
NWS Tornado Report Location: 19 NE Burwell, NE
F0 category
May 21, 2004
8:20 PM CST
Tornado report for May 21, 2004
Yankton County · 7,483 Homes in County
Tornado Report Description: A brief tornado caused no reported damage.
NWS Tornado Report Location: 7 E Yankton, SD
F1 category
May 21, 2004
8:20 PM CST
Tornado report for May 21, 2004
Wayne County · 3,051 Homes in County
Tornado Report Description: A tornado touched down southeast of Wayne causing damage to a house and destroying or severely damaging a barn and 6 outbuildings, along with much of the farm equipment. The debris was strewn for 3 miles downwind.
NWS Tornado Report Location: 2 SE Wayne, NE
F0 category
May 21, 2004
7:44 PM CST
Tornado report for May 21, 2004
Brown County · 1,356 Homes in County
Tornado Report Description: The tornado touched down briefly in open rangeland.
NWS Tornado Report Location: 20 S Ainsworth, NE
F1 category
May 21, 2004
7:20 PM CST
Tornado report for May 21, 2004
Pierce County · 2,855 Homes in County
Tornado Report Description: A narrow tornado was reported by law enforcement and caught on video by a storm chaser north of Hadar. The tornado damaged several buildings in the area including a garage, a house and a few small farm outbuildings. The tornado also downed power lines near Hadar knocking out the power to part of town. The tornado was visible from the northern sections of Norfolk before lifting.
NWS Tornado Report Location: 2 N Hadar, NE
F0 category
May 21, 2004
8:14 PM EST
Tornado report for May 21, 2004
Berkeley County · 35,174 Homes in County
Tornado Report Description: A weak tornado damaged trees in Arden.
NWS Tornado Report Location: 1 W Arden, WV
F0 category
May 21, 2004
6:30 PM CST
Tornado report for May 21, 2004
Wright County · 5,314 Homes in County
Tornado Report Description: Brief touchdown in open area northwest of Clarion.
NWS Tornado Report Location: 6 NW Clarion, IA
F2 category
May 21, 2004
5:19 PM CST
Tornado report for May 21, 2004
Humboldt County · 3,858 Homes in County
Tornado Report Description: Tornado intensified as it approached Bradgate. Seventy five percent of the town was damaged or destroyed by the tornado which was one half mile wide as it moved through.
NWS Tornado Report Location: 1 W Bradgate, IA
F0 category
May 21, 2004
3:16 PM PST
Tornado report for May 21, 2004
Spokane County · 149,492 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: 1 W (Ska)Fairchild Afb, WA
F2 category
May 21, 2004
5:08 PM CST
Tornado report for May 21, 2004
Pocahontas County · 3,270 Homes in County
Tornado Report Description: Tornado touched down in open areas east of Rolfe. It did some damage but didn't do significant damage before crossing into Humboldt County.
NWS Tornado Report Location: Rolfe, IA
F1 category
May 21, 2004
5:00 PM CST
Tornado report for May 21, 2004
Pocahontas County · 3,270 Homes in County
Tornado Report Description: Tornado tracked southeast in open fields, just missing the town of Rolfe.
NWS Tornado Report Location: 5 W Rolfe, IA
F1 category
May 21, 2004
4:12 PM CST
Tornado report for May 21, 2004
Clay County · 6,149 Homes in County
Tornado Report Description: A tornado destroyed a farm house and several other buildings on a farm.
NWS Tornado Report Location: 1 SE Royal, IA
F1 category
May 21, 2004
4:06 PM CST
Tornado report for May 21, 2004
Jones County · 7,163 Homes in County
Tornado Report Description: Rated F1 with winds estimated at 90 to 100 mph.
NWS Tornado Report Location: 1 E Martelle, IA
F0 category
May 21, 2004
3:44 PM CST
Tornado report for May 21, 2004
Benton County · 9,761 Homes in County
Tornado Report Description: Rated F0
NWS Tornado Report Location: 2 S Vinton, IA
F3 category
May 21, 2004
3:22 PM CST
Tornado report for May 21, 2004
Linn County · 68,380 Homes in County
Tornado Report Description: Rated F3 with winds estimated at 175 mph.
NWS Tornado Report Location: 2 SW Palo, IA
Showing 15 of 25
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 May 21, 2004 on the Interactive Map

Report type
Hail
Wind
Tornado

Get a Remote Hail Inspection

Not sure if hail may have affected your home on May 21, 2004? 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 May 21, 2004?

Our records show 409 hail, 304 wind, and 25 tornado reports on May 21, 2004, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on May 21, 2004.

What was the largest hail reported on May 21, 2004?

The largest hail size in these storm-report records on May 21, 2004 is 4.25″, reported near Perryton, TX.

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 May 21, 2004 — 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 May 21, 2004 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 May 21, 2004?

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 May 21, 2004 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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