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Home Return to list Winter Weather Advisory 0021 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-10-31 13:36:51 016 WWUS45 KRIW 311836 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1236 PM MDT Sat Oct 31 2026 WYZ014-011400- /O.NEW.KRIW.WW.Y.0021.261101T1500Z-261102T1200Z/ Wind River Mountains West- 1236 PM MDT Sat Oct 31 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 AM SUNDAY TO 5 AM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 6 to 9 inches above 9000 feet. * WHERE...Wind River Mountains West. * WHEN...From 8 AM Sunday to 5 AM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...Heaviest period of snow occurs between 11 AM and 11 PM MST Sunday. South Pass snow totals up to 2 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ Wittmann Action: Continued Issued At: 2026-11-01 01:32:46 523 WWUS45 KRIW 010732 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 132 AM MDT Sun Nov 1 2026 WYZ014-020000- /O.CON.KRIW.WW.Y.0021.261101T1500Z-261102T1200Z/ Wind River Mountains West- 132 AM MDT Sun Nov 1 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 5 AM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 6 to 9 inches above 9000 feet. * WHERE...Wind River Mountains West. * WHEN...From 8 AM this morning to 5 AM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...Heaviest period of snow occurs between 11 AM and 11 PM MST Sunday. South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ Hattings Action: Time and Area Extended Issued At: 2026-11-01 11:08:17 708 WWUS45 KRIW 011707 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1007 AM MST Sun Nov 1 2026 WYZ015-021400- /O.EXB.KRIW.WW.Y.0021.261102T0300Z-261103T0000Z/ Wind River Mountains East- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 5 to 8 inches above 9000 feet. * WHERE...Wind River Mountains East. * WHEN...From 8 PM this evening to 5 PM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ009-021400- /O.EXB.KRIW.WW.Y.0021.261102T0800Z-261103T0000Z/ Bighorn Mountains Southeast- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 6 to 10 inches above 9000 feet. Total accumulations 10 to 15 inches at the highest elevations near Cloud Peak. Winds gusting as high as 55 mph. * WHERE...Bighorn Mountains Southeast. * WHEN...From 1 AM to 5 PM MST Monday. * IMPACTS...Travel could be difficult across mountain passes due to a combination of falling snow and gusty winds. * ADDITIONAL DETAILS...The greatest accumulations will occur across the far northern range, north of Powder River Pass. Up to 2 inches snow for Powder River Pass. Total snow accumulations 5 to 8 inches at Granite Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ014-021200- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261102T1200Z/ Wind River Mountains West- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST MONDAY... * WHAT...Snow. Additional snow accumulations 2 to 6 inches above 9000 feet. * WHERE...Wind River Mountains West. * WHEN...Until 5 AM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ Wittmann Action: Continued Issued At: 2026-11-01 11:08:17 708 WWUS45 KRIW 011707 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1007 AM MST Sun Nov 1 2026 WYZ015-021400- /O.EXB.KRIW.WW.Y.0021.261102T0300Z-261103T0000Z/ Wind River Mountains East- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 5 to 8 inches above 9000 feet. * WHERE...Wind River Mountains East. * WHEN...From 8 PM this evening to 5 PM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ009-021400- /O.EXB.KRIW.WW.Y.0021.261102T0800Z-261103T0000Z/ Bighorn Mountains Southeast- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 6 to 10 inches above 9000 feet. Total accumulations 10 to 15 inches at the highest elevations near Cloud Peak. Winds gusting as high as 55 mph. * WHERE...Bighorn Mountains Southeast. * WHEN...From 1 AM to 5 PM MST Monday. * IMPACTS...Travel could be difficult across mountain passes due to a combination of falling snow and gusty winds. * ADDITIONAL DETAILS...The greatest accumulations will occur across the far northern range, north of Powder River Pass. Up to 2 inches snow for Powder River Pass. Total snow accumulations 5 to 8 inches at Granite Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ014-021200- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261102T1200Z/ Wind River Mountains West- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST MONDAY... * WHAT...Snow. Additional snow accumulations 2 to 6 inches above 9000 feet. * WHERE...Wind River Mountains West. * WHEN...Until 5 AM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ Wittmann Action: Time and Area Extended Issued At: 2026-11-01 11:08:17 708 WWUS45 KRIW 011707 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1007 AM MST Sun Nov 1 2026 WYZ015-021400- /O.EXB.KRIW.WW.Y.0021.261102T0300Z-261103T0000Z/ Wind River Mountains East- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 5 to 8 inches above 9000 feet. * WHERE...Wind River Mountains East. * WHEN...From 8 PM this evening to 5 PM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ009-021400- /O.EXB.KRIW.WW.Y.0021.261102T0800Z-261103T0000Z/ Bighorn Mountains Southeast- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations 6 to 10 inches above 9000 feet. Total accumulations 10 to 15 inches at the highest elevations near Cloud Peak. Winds gusting as high as 55 mph. * WHERE...Bighorn Mountains Southeast. * WHEN...From 1 AM to 5 PM MST Monday. * IMPACTS...Travel could be difficult across mountain passes due to a combination of falling snow and gusty winds. * ADDITIONAL DETAILS...The greatest accumulations will occur across the far northern range, north of Powder River Pass. Up to 2 inches snow for Powder River Pass. Total snow accumulations 5 to 8 inches at Granite Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ014-021200- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261102T1200Z/ Wind River Mountains West- 1007 AM MST Sun Nov 1 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST MONDAY... * WHAT...Snow. Additional snow accumulations 2 to 6 inches above 9000 feet. * WHERE...Wind River Mountains West. * WHEN...Until 5 AM MST Monday. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ Wittmann Action: Continued Issued At: 2026-11-02 05:57:38 268 WWUS45 KRIW 021157 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 457 AM MST Mon Nov 2 2026 WYZ014-021300- /O.EXP.KRIW.WW.Y.0021.000000T0000Z-261102T1200Z/ Wind River Mountains West- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM MST THIS MORNING... The focus for precipitation has shifted to areas east of the Divide this morning. Thus, the Winter Weather Advisory will be allowed to expire. $$ WYZ009-030000- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261103T0000Z/ Bighorn Mountains Southeast- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations 6 to 10 inches above 9000 feet. Total accumulations 10 to 15 inches at the highest elevations near Cloud Peak. Winds gusting as high as 55 mph. * WHERE...Bighorn Mountains Southeast. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult across mountain passes due to a combination of falling snow and gusty winds. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ015-030000- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261103T0000Z/ Wind River Mountains East- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations 5 to 8 inches above 9000 feet. * WHERE...Wind River Mountains East. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ TL Action: Continued Issued At: 2026-11-02 05:57:38 268 WWUS45 KRIW 021157 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 457 AM MST Mon Nov 2 2026 WYZ014-021300- /O.EXP.KRIW.WW.Y.0021.000000T0000Z-261102T1200Z/ Wind River Mountains West- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM MST THIS MORNING... The focus for precipitation has shifted to areas east of the Divide this morning. Thus, the Winter Weather Advisory will be allowed to expire. $$ WYZ009-030000- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261103T0000Z/ Bighorn Mountains Southeast- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations 6 to 10 inches above 9000 feet. Total accumulations 10 to 15 inches at the highest elevations near Cloud Peak. Winds gusting as high as 55 mph. * WHERE...Bighorn Mountains Southeast. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult across mountain passes due to a combination of falling snow and gusty winds. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ015-030000- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261103T0000Z/ Wind River Mountains East- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations 5 to 8 inches above 9000 feet. * WHERE...Wind River Mountains East. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ TL Action: Expired Issued At: 2026-11-02 05:57:38 268 WWUS45 KRIW 021157 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 457 AM MST Mon Nov 2 2026 WYZ014-021300- /O.EXP.KRIW.WW.Y.0021.000000T0000Z-261102T1200Z/ Wind River Mountains West- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM MST THIS MORNING... The focus for precipitation has shifted to areas east of the Divide this morning. Thus, the Winter Weather Advisory will be allowed to expire. $$ WYZ009-030000- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261103T0000Z/ Bighorn Mountains Southeast- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations 6 to 10 inches above 9000 feet. Total accumulations 10 to 15 inches at the highest elevations near Cloud Peak. Winds gusting as high as 55 mph. * WHERE...Bighorn Mountains Southeast. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult across mountain passes due to a combination of falling snow and gusty winds. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ015-030000- /O.CON.KRIW.WW.Y.0021.000000T0000Z-261103T0000Z/ Wind River Mountains East- 457 AM MST Mon Nov 2 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations 5 to 8 inches above 9000 feet. * WHERE...Wind River Mountains East. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Mountain travel could be difficult. * ADDITIONAL DETAILS...South Pass snow totals up to 4 inches, mainly for the highest elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ https://www.weather.gov/riw/ TL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||