County Hazards

Hazards › Tornado

Tornado across the United States

81,281 tornadoes events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Tornado. 2,304 counties have a tornado page.

NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.

81,281events since 1950
6,410deaths recorded by NCEI
2,304county pages (10+ events)
2.3events per 100 sq mi, national

By year

195019882026
Tornado events recorded nationally per year, 1950 to 2026.

Seasonality

Jan
2,259
Feb
2,507
Mar
6,403
Apr
12,666
May
17,729
Jun
13,954
Jul
7,548
Aug
5,375
Sep
3,869
Oct
3,223
Nov
3,301
Dec
2,447
Tornado events by month of occurrence, all years, national.

Magnitude distribution

EF0/F033,790
EF1/F127,101
EF2/F211,720
EF3/F33,623
EF4/F41,143
EF5/F5139
Unrated3,738
Enhanced Fujita scale wind estimates
EF0/F0
65–85 mph (EF0)
EF1/F1
86–110 mph (EF1)
EF2/F2
111–135 mph (EF2)
EF3/F3
136–165 mph (EF3)
EF4/F4
166–200 mph (EF4)
EF5/F5
over 200 mph (EF5)
Unrated
no rating recorded

States

StateEventsPer 100 sq miDeaths
Texas10,0903.9595
Oklahoma5,0547.4364
Kansas4,9656.1238
Florida3,8207.1207
Illinois3,6476.6236
Mississippi3,5327.5537
Iowa3,5016.3100
Nebraska3,4004.456
Alabama3,2066.3692
Missouri3,1184.5429
Louisiana2,8016.5180
Arkansas2,5654.9413
Colorado2,4452.45
Minnesota2,4333.1101
Georgia2,3564.1220
Indiana2,1035.9276
South Dakota1,9472.619
Wisconsin1,8203.498
North Dakota1,7992.629
Tennessee1,7044.1408
North Carolina1,6913.5137
Ohio1,5653.8200
Kentucky1,4973.8246
South Carolina1,3194.467
Michigan1,2912.3253
Pennsylvania1,0912.483
Virginia9132.339
Wyoming7650.84
New Mexico6870.65
New York5631.232
California4880.3—
Maryland4384.59
Montana4320.34
Arizona3060.33
Idaho2240.3—
New Jersey2072.81
Massachusetts2052.6105
West Virginia1910.83
Utah1460.21
Maine1400.51
Washington1380.26
Oregon1340.1—
Connecticut1302.74
New Hampshire1121.31
Nevada970.1—
Delaware814.23
Vermont530.6—
Hawaii420.7—
Rhode Island201.9—
District of Columbia58.2—
Alaska40.0—

Counties with the most recorded events

CountyEvents
Weld County, CO293
Harris County, TX254
Washington County, CO213
Palm Beach County, FL198
Adams County, CO192
Polk County, FL165
Miami-Dade County, FL150
Hillsborough County, FL149
Broward County, FL147
Pinellas County, FL147
Oklahoma County, OK141
Brevard County, FL139
Hale County, TX134
Lee County, FL130
Caddo County, OK130
Laramie County, WY130
Mobile County, AL129
Elbert County, CO127
Hinds County, MS127
Galveston County, TX126
McLean County, IL122
Kit Carson County, CO119
Osage County, OK118
Baldwin County, AL116
Lincoln County, CO115
Ford County, KS115
Calcasieu Parish, LA114
Rankin County, MS114
Cleveland County, OK113
Jefferson County, AL111

Most per 100 square miles (25+ events)

CountyPer 100 sq miEvents
Pinellas County, FL53.7147
Galveston County, TX33.2126
Jefferson Parish, LA21.966
Cleveland County, OK21.0113
Oklahoma County, OK19.9141
New Hanover County, NC17.233
Tulsa County, OK17.298
Lee County, FL16.6130
Adams County, CO16.5192
Harrison County, MS15.991
Carteret County, NC15.880
Lafayette Parish, LA15.642
Johnson County, TX15.2110
Escambia County, FL15.199
Sarasota County, FL15.184
Harris County, TX14.9254
Orleans Parish, LA14.725
Rankin County, MS14.7114
McClain County, OK14.784
Hillsborough County, FL14.6149
Scott County, IA14.667
DuPage County, IL14.648
Hinds County, MS14.6127
Smith County, MS14.693
Hall County, NE14.680
Mayes County, OK14.293
Hancock County, MS14.167
Macon County, IL14.081
Jefferson Davis County, MS14.057
Simpson County, MS13.982

Counts reflect reporting density as well as weather. County figures include zone-recorded events whose forecast zone is named for the county; state figures include all zone-recorded events.