Niobrara County, Wyoming tornadoes

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36confirmed tornadoes since NOAA records began in 1950 (the first here in 1950). Most recent: June 17, 2025, EFU. 2026 so far: 0 preliminary reports preliminary

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Map

Every tornado path in the county

Tornado paths, 1950 to 2025
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(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5Unrated

Each path is a straight line from where the tornado started to where it ended, which is all most NOAA records hold. Tap a path for its details.

Recent warnings

Recent warnings in Niobrara County

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The record

At a glance

Total361950 to 2025
Per year0.5average since 1950
Peak monthJune20 of 36
StrongestF2Jul 28, 1978
Deaths0whole paths, see note
Injuries5whole paths, see note

Deaths and injuries are NOAA's totals for each tornado's whole path, which can extend beyond Niobrara County.

Seasons

When tornadoes hit here

By month

200 Jan: 0Feb: 0Mar: 0Apr: 1May: 5Jun: 20Jul: 6Aug: 2Sep: 2Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 20 of 36 tornadoes.

By time of day

60 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 1: 012 PM: 1: 0: 43 PM: 6: 3: 56 PM: 6: 3: 39 PM: 3: 1: 012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 3:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

40 1950: 1: 0: 1: 1: 0: 0: 0: 0: 0: 01960: 2: 0: 2: 0: 0: 0: 0: 0: 0: 01970: 0: 0: 0: 0: 0: 0: 1: 1: 1: 11980: 1: 0: 1: 1: 4: 2: 0: 0: 0: 01990: 2: 3: 0: 0: 0: 0: 0: 0: 2: 12000: 0: 1: 0: 0: 0: 0: 0: 0: 0: 02010: 0: 2: 0: 0: 0: 0: 0: 0: 0: 22020: 0: 0: 1: 0: 0: 219501960197019801990200020102020

The line is the five-year average. Tornadoes before about 1953 were under-reported, and better radar since the 1990s finds more weak ones.

By rating

EF0
17
EF1
12
EF2
3
Unknown
4

Ratings before February 2007 use the original F scale; the numbers line up with today's EF scale. Unknown means NOAA could not assign a rating.

The record

Notable tornadoes

Strongest

F2, July 28, 1978

5 mile path Longest path

7.2 miles, F1

June 11, 1953, whole path Widest

700 yards, F2

July 28, 1978
Every tornado

All 36 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 17, 2025EFU0.1 mi10 yd00
Jun 17, 2025EFU0.1 mi10 yd00
Jun 7, 2022EF13.5 mi225 yd00
Jul 17, 2019EFU0.27 mi20 yd00
Jul 3, 2019EFU0.02 mi50 yd00
Jun 12, 2011EF00.01 mi30 yd00
Jun 12, 2011EF00.02 mi25 yd00
Jun 12, 2001F00.2 mi30 yd00
Jun 27, 1999F00.2 mi40 yd00
May 21, 1998F02 mi30 yd00
May 20, 1998F03 mi30 yd00
Aug 7, 1991F00.1 mi40 yd00
Jun 29, 1991F00.2 mi40 yd00
Jun 26, 1991F00.1 mi10 yd00
Sep 19, 1990F00.1 mi10 yd00
May 13, 1990F00.5 mi50 yd00
Jul 26, 1985F00.2 mi10 yd00
Jul 26, 1985F00.2 mi10 yd00
Jun 13, 1984F24 mi30 yd01
Jun 13, 1984F11 mi20 yd00
Jun 13, 1984F11 mi20 yd00
Jun 13, 1984F11 mi20 yd00
Jun 20, 1983F11 mi30 yd00
Jun 5, 1982F21 mi17 yd03
Jun 14, 1980F00.1 mi10 yd00
Nearby

Nearby counties

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Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025, and SPC preliminary reports for 2026. Page built October 13, 2026.