Johnson County weather alerts
There are no active weather alerts for Johnson County, WY right now.
Since 2016 the National Weather Service has issued about 727 alerts that included Johnson County, roughly 73 a year. The most common is the severe thunderstorm warning (182 from 2016 to 2025). The last tornado warning was issued on June 23, 2023. 22 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Johnson County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Natrona County, Converse County, Sheridan County, Washakie County.
Johnson County alert history
Alert events that included Johnson County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 182 | 13 | August 23, 2026 |
| Winter Weather Advisory | 94 | 6 | May 18, 2026 |
| Red Flag Warning | 75 | 16 | October 23, 2026 |
| High Wind Warning | 53 | 7 | November 2, 2026 |
| Fire Weather Watch | 52 | 7 | October 9, 2026 |
| Winter Storm Watch | 38 | 0 | April 17, 2025 |
| Flood Advisory | 37 | 4 | August 23, 2026 |
| High Wind Watch | 34 | 3 | November 2, 2026 |
| Winter Storm Warning | 31 | 2 | April 2, 2026 |
| Severe Thunderstorm Watch | 28 | 5 | August 18, 2026 |
| Tornado Warning | 15 | 0 | June 23, 2023 |
| Flash Flood Warning | 12 | 0 | June 9, 2024 |
| Cold Weather Advisory | 12 | 0 | January 20, 2025 |
| Freeze Watch | 10 | 2 | October 16, 2026 |
| Flood Watch | 10 | 2 | September 18, 2026 |
| Freeze Warning | 9 | 5 | October 16, 2026 |
| Extreme Cold Warning | 8 | 0 | January 15, 2024 |
| Blizzard Warning | 6 | 0 | February 21, 2023 |
| Dense Fog Advisory | 5 | 0 | January 17, 2023 |
| Flood Warning | 5 | 0 | May 28, 2019 |
| Tornado Watch | 3 | 0 | June 23, 2023 |
| Snow Squall Warning | 3 | 0 | February 8, 2023 |
| Heat Advisory | 2 | 2 | August 1, 2026 |
| Wind Advisory | 1 | 0 | December 31, 2017 |
| Extreme Cold Watch | 1 | 0 | December 21, 2022 |
| Frost Advisory | 1 | 0 | October 6, 2023 |
| Extreme Heat Watch | 0 | 1 | July 11, 2026 |
| Extreme Heat Warning | 0 | 1 | July 11, 2026 |
Tornado history in Johnson County
22 tornadoes have been recorded in Johnson County since 1950, injuring 2 people. That ranks 13 of 23 counties in Wyoming. The most recent was on June 19, 2019 (rated EF1).
Strongest tornadoes in Johnson County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 12, 2017 | EF2 | Johnson County | 1.6 mi | 250 yd | 0 | 0 |
| June 1, 2018 | EF2 | Johnson County | 1 mi | 300 yd | 0 | 0 |
| May 9, 1977 | F1 | Johnson County | 4.5 mi | 27 yd | 0 | 0 |
| June 19, 2019 | EF1 | Johnson County | 4.1 mi | 250 yd | 0 | 0 |
| August 14, 1974 | F1 | Johnson County | 1.5 mi | 67 yd | 0 | 2 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 19, 2019 | EF1 | Johnson County | 4.1 mi | 250 yd | 0 | 0 |
| June 1, 2018 | EF2 | Johnson County | 1 mi | 300 yd | 0 | 0 |
| June 12, 2017 | EF2 | Johnson County | 1.6 mi | 250 yd | 0 | 0 |
| June 1, 2010 | EF0 | Johnson County | 0.1 mi | 25 yd | 0 | 0 |
| May 29, 2008 | EF0 | Johnson County | 0.1 mi | 10 yd | 0 | 0 |
About Johnson County
- Population: 8,803 (2024 estimate)
- State: Wyoming
- NOAA Weather Radio SAME code: 056019 (how to use it)