National Weather Service United States Department of Commerce

The National Weather Service in Riverton Wyoming has determined the strong potential exists for severe weather to develop Monday afternoon and evening.

Potentially dangerous thunderstorms are anticipated to impact northern and central Wyoming with the threat of isolated tornadoes, large hail, strong winds, and dangerous lightning.  


Summary | Forecast | Monitoring & Reporting | Safety

A strong upper level low pressure system will move across the northern Great Basin today.  The environment
ahead of this system will be favorable for severe thunderstorms to develop across much of central and northern
Wyoming.  Strong south winds will develop across southern Wyoming where High Wind Warnings are in
effect today. 

Video Weather Briefing on Severe Weather, Wind and Snow

5 am Monday Video Briefing for Severe Weather


Regional and Local Radars (click on image to enlarge)
Northern Rockies Radar
Riverton Radar
Billings, MT
Rapid City, SD
Pocatello, ID
Today's Severe Weather Outlook Today's Severe Hail Risk  (Hail >= 1")
Click Image to Enlarge Click Image to Enlarge
Today's Tornado Risk Today's Severe Wind Risk (Gusts >= 58 mph)
Click Image to Enlarge Click Image to Enlarge
High Wind Watches and Warnings Maximum Non-Thunderstorm Wind Gusts
through 9 PM Monday
Click Image to Enlarge Click Image to Enlarge

Monitor our Severe Weather Summary Page for current Warnings, Watches, and Advisories. What's the difference?
Current Weather Story Check the latest Weather Story graphic for an overview of the area forecast.
NWS Riverton Radar Check out what's on the radar.
Riverton | Pocatello | Cheyenne | Billings | Salt Lake City | Rapid City | Mosaic
Submit storm reports/images and keep up to date with us on Facebook!
Other reporting methods include eSpotter, email (, or by phone at 1-800-211-1448.
Check the latest Public Information Statement for the latest storm reports.
WyDoT's Webpage Monitor current road conditions by visiting the Wyoming Dept. of Transportation (WYDOT) or by calling 5-1-1.



Now is the time for you to prepare for this event.

Some reminders about severe weather preparedness:

  • Find a sturdy, indoor shelter when storms approach. Remain at this location until the storms have passed.
  • Abandon mobile homes and cars immediately to seek shelter in a substantial structure.
  • In Wyoming, lightning is responsible for more deaths and injuries than any other thunderstorm phenomena. Move indoors immediately when thunder is heard.  Remain indoors until 30 minutes after the last rumble of thunder is heard.
  • If indoor shelter is unavailable:
    • Do not seek shelter under trees.
    • Find a ditch and remain low to the ground.
    • If lightning is near, keep on the balls of your feet.
    • Shield your neck and head.
  • If sirens sound, move to the lowest level of your house, or an interior room with the fewest number of windows.
    • If there is time, shield your body with a mattress.
  • If severe weather is encountered while you are in your car:
    • Keep the windows closed.
    • Slow down or stop, if possible.
    • Do not travel towards a tornado, it may shift and come towards you.
    • Leave your roof closed.
    • Remain in your car, but shield your face in case of breaking glass.
  • Do not travel through water-covered roadways, you may not see the washed out roadway below.
  • Turn Around Don’t Drown!

Please watch for issuances of additional severe weather-related products. This may include warnings for Thunderstorms, or Tornadoes,  Flooding (warning),  Flash Flooding (watch) or Flash Flooding (warning).  Follow-up statements for thunderstorm or tornado warnings may be found in the Severe Weather Statement.


Emergency Kit      |      Thunderstorm & Lightning Safety

Learn more about the National Weather Service's efforts to build a Weather-Ready Nation!