Historical records. Public data.
Every placehas a history.
Explore tornadoes, hurricanes, wildfires and floods across America.
- 73,458 Tornadoes
since 1950 - 3,250 Tropical cyclones
since 1851 - 21,293 Large wildfires
since 1984 - 2.66M Flood insurance claims
since 1978 - 5,098 Federal disaster
declarations since 1953
Featured places
Explore the record.
Seven places whose records show the range of American hazard, from Tornado Alley to the Florida Keys.
View all placesMore places:Cook County, ILCollin County, TXHarris County, TXOrleans Parish, LAWeld County, COTampa, FLMoore, OK
The national record
Counties that lead the country in each hazard. Every name opens its full record.
View all rankingsBy hazard and over time
The same record arranged by hazard, by ranking and by date.
- TornadoesEvery F5 and EF5, the deadliest, and tornadoes year by year since 1950.
- HurricanesThe strongest U.S. strikes since 1851 and every storm’s track.
- WildfiresThe largest fires since 1984 with their mapped perimeters.
- Hail and windThe biggest severe wind days since 1955 and the largest hailstones.
- FloodsRiver crests at every flood gauge, flood insurance claims and the deadliest floods.
- EarthquakesThe strongest since 1900, year by year, and where they strike.
- DroughtEvery county's drought index since 1895 and the worst drought years.
- Weather extremesThe hottest, coldest, snowiest and wettest American cities.
- Year by yearEvery year since 1851 in one timeline.
- On this dayWhat struck on each date of the calendar.
- Compare two countiesTwo records and fingerprints side by side.
Browse by state
Each state ranks every county and maps its strongest tornadoes, hurricanes and fires. Figures are tornadoes since 1950.
- Alabama3,191
- Alaska5
- Arizona306
- Arkansas2,544
- California490
- Colorado2,521
- Connecticut131
- Delaware80
- District of Columbia6
- Florida3,884
- Georgia2,432
- Hawaii41
- Idaho227
- Illinois3,650
- Indiana2,081
- Iowa3,584
- Kansas5,115
- Kentucky1,508
- Louisiana2,807
- Maine140
- Maryland448
- Massachusetts215
- Michigan1,297
- Minnesota2,463
- Mississippi3,526
- Missouri3,098
- Montana451
- Nebraska3,584
- Nevada97
- New Hampshire114
- New Jersey211
- New Mexico684
- New York571
- North Carolina1,734
- North Dakota1,831
- Ohio1,591
- Oklahoma5,048
- Oregon139
- Pennsylvania1,085
- Rhode Island20
- South Carolina1,328
- South Dakota2,039
- Tennessee1,734
- Texas10,201
- Utah145
- Vermont53
- Virginia946
- Washington138
- West Virginia192
- Wisconsin1,866
- Wyoming761
What this record is
Every number on StormWorn comes from a public federal dataset: the Storm Prediction Center’s tornado database, the National Hurricane Center’s storm tracks, NOAA’s Storm Events Database, satellite-mapped fire perimeters, FEMA’s flood insurance claims and disaster declarations, and daily observations from NOAA’s weather stations.
The value is in the joining. We assign every record to the counties and cities it touched, measure storm tracks against county boundaries hour by hour, choose the most representative weather station for each place, and rank each county against its state and the nation. It is a historical record, not a forecast or a risk score. The methodology sets out every rule.