Heavy Rain in Wyoming

Events

52

Deaths

1

Injuries

0

Damage

$19,000

• Hail and Damaging Wind in Wyoming, August 2, 20131 death · $50,000 · 1.5 in hail · 3 eventsA thunderstorm developed in the Gillette area and quickly became severe. The storm produced heavy rain over part of town and large hail and strong wind gusts east of Gillette.
• Tornadoes and Flash Flooding in Wyoming, May 18, 2010$118,000 · EF2 · 30 eventsSoutheast low level wind flow increased ahead of a low pressure system over northern Colorado the afternoon of May 18 2010. A strong low level southeast jet combined with dynamics of the low to create a favorable environment for severe thunderstorms.
• Flash Flooding and Hail in Wyoming, July 12 to 13, 20112 in hail · 41 eventsIntense afternoon and evening thunderstorms produced numerous reports of large hail and flash flooding throughout Laramie County in southeast Wyoming.
• Hail and Damaging Winds in Wyoming, August 3 to 4, 2013$25,000 · 1 in hail · 6 eventsA severe thunderstorm produced strong wind gusts and heavy rain over northern Campbell County into Crook County. Three to five inches of rain fell in a few hours, causing minor flooding along rural roads in the Recluse area of northern Campbell County.
• Heavy Snow and High Wind in Wyoming, April 22 to 24, 201053 kt wind · 19 eventsA slow moving winter storm system progressed eastward through the area. Due to the rather warm conditions ahead of the system, the precipitation changed from rain to snow.
• Heavy Rain in Wyoming, September 29 to 30, 201416 eventsAn intense low pressure system moved northeast from northern Colorado into western South Dakota and produced widespread showers and thunderstorms with heavy rainfall. During a 24 hour period, one to three inches fell over southeast Wyoming.
• Flash Flooding and Hail in Wyoming, June 12, 20162.5 in hail · 15 eventsThunderstorms produced very large hail, damaging winds and torrential rainfall across portions of south central and southeast Wyoming. Flash flooding was reported in and around Torrington and Cheyenne.
• Flash Flood and Hail in Wyoming, July 24, 20112.5 in hail · 13 eventsLate afternoon and early evening thunderstorms produced numerous reports of large hail, as well as isolated strong winds and flash flooding across extreme southeast Wyoming.
• Winter Storm and High Wind in Wyoming, February 8 to 10, 2017$10,000 · 103 kt wind · 11 eventsThe last of a series of potent Pacific storms moves through the area from February 8th through February 10th. This storm was warmer than the previous systems and much of the precipitation in the western valleys fell as rain rather than snow.
• Flash Flood and Hail in Wyoming, June 6 to 7, 20122 in hail · 8 eventsAfternoon and evening thunderstorms produced hail and heavy rain in portions of southeast Wyoming, with Laramie County receiving the brunt of the severe weather.
• Hail and Heavy Rain in Wyoming, August 21, 20020.88 in hail · 5 eventsGround whitened by hail
• Flash Flood and Flooding in Wyoming, June 6 to 7, 20075 eventsA large spring storm associated with a cutoff upper level low, moved across the Northern Rockies on the afternoon of June 6th through the morning of June7th.
• Flood and Heavy Snow in Wyoming, May 7 to 8, 20054 events2.52 inches of rain in Dayton (24 hour total)
• Hail and Damaging Wind in Wyoming, June 19, 20121.5 in hail · 4 eventsLate evening thunderstorms produced several reports of large hail, as well as heavy rain and strong winds in Goshen County.
• Flash Flood and Hail in Wyoming, July 17, 20181 in hail · 4 eventsA severe thunderstorm developed over southeastern Crook County and slowly moved northeast toward Beulah area. The storm produced large hail, heavy rain, and flooding.
• Heavy Rain in Wyoming, May 7, 20053 events2.45 inches of rain fell in 14 hours in Sheridan
• Hail and Heavy Rain in Wyoming, August 16, 20101 in hail · 3 eventsScattered thunderstorms developed during the late morning and early afternoon. While the environment was not especially conducive for severe thunderstorms, the combination of ample lift and shear allowed organized convection to form.
• Flooding and Heavy Rain in Wyoming, May 27 to 31, 20183 eventsSeveral days of thunderstorms that produced heavy rainfall saturated the soils across portions of Crook and Weston Counties. Runoff eventually caused minor flooding in some areas.
• Heavy Rain in Wyoming, June 12 to 13, 20012 eventsHeavy rain flooded streets, caused power outages. Amounts ranged up to 3.25 inches. Heavy rain and snow downed power poles and lines on Heart Mountain near Cody.
• Heavy Rain in Wyoming, May 12, 20052 events3.45 inches of rain in Sheridan
• Flash Flood and Heavy Rain in Wyoming, June 19, 20112 eventsThunderstorm with heavy rain caused flash flooding across Laramie County.
• Flash Flood and Heavy Rain in Wyoming, August 3, 20112 eventsStrong, slow moving thunderstorms produced one to three inches of rain within a two-hour period during the late afternoon, resulting in flash flooding on the north side of Cheyenne.
• Flash Flood and Heavy Rain in Wyoming, May 24 to 25, 2014$10,000 · 2 eventsOver five inches of rain fell in less than five hours on the north side of Gillette. Runoff overwhelmed drainage systems and flooded several roads near the Gillette-Campbell County Airport.
• Heavy Rain in Wyoming, July 2, 19981 eventA spotter reported 1.50 inches of rain in one hour from a thunderstorm.
• Heavy Rain in Wyoming, September 2 to 3, 19991 eventHeavy rain caused rock and mud slides across U.S. Highway 20 and the BNSF tracks between Shoshoni and Thermopolis.

Heavy Rain everywhereEvery kind of event in Wyoming

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.