Weather Alerts For Casper, WY

# HEADLINE -------------------- FREEZE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY MORNING # DETAILS -------------------- WHAT Sub-freezing temperatures ranging from 20 F to 30 F degrees. WHERE Lander Foothills, Natrona County Lower Elevations, Southwest Bighorn Basin, Wind River Basin, Northeast Johnson County, Southeast Bighorn Basin, Southeast Johnson County, Cody Foothills, and North Bighorn Basin. WHEN From late Tuesday night through Wednesday morning. IMPACTS Frost and freeze conditions could kill crops, other sensitive vegetation, and possibly damage unprotected outdoor plumbing. ISSUED AT Sunday, May 3, 2026 at 1:06 PM MDT ISSUED BY National Weather Service Riverton WY HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Take steps now to protect tender plants from the cold. # AREAS AFFECTED -------------------- Southeast Bighorn Basin, Cody Foothills, Lander Foothills, Natrona County Lower Elevations, North Bighorn Basin, Northeast Johnson County, Southeast Johnson County, Southwest Bighorn Basin, Wind River Basin Including the cities of Greybull, Lovell, Clark, Shell, Thermopolis, Riverton, Shoshoni, Lander, Kaycee, Ten Sleep, Basin, Casper, Worland, Meeteetse, Cody, Buffalo, and Powell

Closest strike: 22.02 miles Monitor Storms You are not at immediate risk, but frequently check WeatherBug to see if storms are moving towards you. Be aware that new storms can also form with little notice.

Pollen Index: 10.5 Pollen Level: high Predominant Pollen: Cedar/Juniper, Maple and Elm. The amount of pollen in the air for Monday will be falling but will remain in the high range. This lowering of pollen concentrations is a result of rising humidity, weakening winds and expected precipitation in the evening which tends to wash pollen out of the air. With this amount of reduction in pollen levels, tomorrow should be better for allergy sufferers.