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Home Return to list Freeze Warning 0003 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-05-18 18:57:31 300 WWUS75 KRIW 182357 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 557 PM MDT Mon May 18 2026 WYZ003>006-010-011-191500- /O.NEW.KRIW.FZ.W.0003.260519T0300Z-260519T1500Z/ Cody Foothills-North Bighorn Basin-Southwest Bighorn Basin- Southeast Bighorn Basin-Northeast Johnson County-Southeast Johnson County- Including the cities of Greybull, Worland, Meeteetse, Kaycee, Clark, Cody, Powell, Shell, Lovell, Ten Sleep, Basin, Thermopolis, and Buffalo 557 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 9 AM MDT TUESDAY... * WHAT...Low temperatures of 24 to 28 degrees. * WHERE...Southwest Bighorn Basin, Northeast Johnson County, Southeast Bighorn Basin, Southeast Johnson County, Cody Foothills, and North Bighorn Basin. * WHEN...From 9 PM Monday evening to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...A clearing sky overnight will allow for temperatures to fall well below seasonal normals. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent water pipes from freezing, wrap or drain water lines. && $$ WYZ016>020-191500- /O.NEW.KRIW.FZ.W.0003.260519T0300Z-260519T1500Z/ Upper Wind River Basin-Wind River Basin-Lander Foothills-Green Mountains and Rattlesnake Range-Natrona County Lower Elevations- Including the cities of Casper, Lander, Jeffrey City, Riverton, Shoshoni, and Dubois 557 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 9 AM MDT TUESDAY... * WHAT...Low temperatures of 20 to 24 degrees, with colder temperatures of 15 to 20 degrees possible in snow-covered areas above 6,000 feet. * WHERE...Green Mountains and Rattlesnake Range, Lander Foothills, Natrona County Lower Elevations, Upper Wind River Basin, and Wind River Basin. * WHEN...From 9 PM Monday evening to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Overnight lows could be a few degrees warmer if cloud cover does not clear early Tuesday. Sub-freezing temperatures would still occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent water pipes from freezing, wrap or drain water lines. && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . CNJ Action: New Issued At: 2026-05-18 18:57:31 300 WWUS75 KRIW 182357 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 557 PM MDT Mon May 18 2026 WYZ003>006-010-011-191500- /O.NEW.KRIW.FZ.W.0003.260519T0300Z-260519T1500Z/ Cody Foothills-North Bighorn Basin-Southwest Bighorn Basin- Southeast Bighorn Basin-Northeast Johnson County-Southeast Johnson County- Including the cities of Greybull, Worland, Meeteetse, Kaycee, Clark, Cody, Powell, Shell, Lovell, Ten Sleep, Basin, Thermopolis, and Buffalo 557 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 9 AM MDT TUESDAY... * WHAT...Low temperatures of 24 to 28 degrees. * WHERE...Southwest Bighorn Basin, Northeast Johnson County, Southeast Bighorn Basin, Southeast Johnson County, Cody Foothills, and North Bighorn Basin. * WHEN...From 9 PM Monday evening to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...A clearing sky overnight will allow for temperatures to fall well below seasonal normals. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent water pipes from freezing, wrap or drain water lines. && $$ WYZ016>020-191500- /O.NEW.KRIW.FZ.W.0003.260519T0300Z-260519T1500Z/ Upper Wind River Basin-Wind River Basin-Lander Foothills-Green Mountains and Rattlesnake Range-Natrona County Lower Elevations- Including the cities of Casper, Lander, Jeffrey City, Riverton, Shoshoni, and Dubois 557 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 9 AM MDT TUESDAY... * WHAT...Low temperatures of 20 to 24 degrees, with colder temperatures of 15 to 20 degrees possible in snow-covered areas above 6,000 feet. * WHERE...Green Mountains and Rattlesnake Range, Lander Foothills, Natrona County Lower Elevations, Upper Wind River Basin, and Wind River Basin. * WHEN...From 9 PM Monday evening to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Overnight lows could be a few degrees warmer if cloud cover does not clear early Tuesday. Sub-freezing temperatures would still occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent water pipes from freezing, wrap or drain water lines. && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . CNJ Action: Expired Issued At: 2026-05-19 09:32:47 380 WWUS75 KRIW 191432 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 832 AM MDT Tue May 19 2026 WYZ003>006-010-011-016>020-191545- /O.EXP.KRIW.FZ.W.0003.000000T0000Z-260519T1500Z/ Cody Foothills-North Bighorn Basin-Southwest Bighorn Basin- Southeast Bighorn Basin-Northeast Johnson County-Southeast Johnson County-Upper Wind River Basin-Wind River Basin-Lander Foothills-Green Mountains and Rattlesnake Range-Natrona County Lower Elevations- Including the cities of Cody, Basin, Dubois, Shoshoni, Clark, Worland, Thermopolis, Casper, Meeteetse, Lander, Jeffrey City, Kaycee, Greybull, Buffalo, Riverton, Ten Sleep, Lovell, Powell, and Shell 832 AM MDT Tue May 19 2026 ...FREEZE WARNING WILL EXPIRE AT 9 AM MDT THIS MORNING... Temperatures continue to increase this morning. Therefore, the Freeze Warnings will be allowed to expire. High temperatures today reach the low-50s to mid-60s today. Cold temperatures return again tonight. $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Wittmann | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||