Alert archive / Wyoming / Winter Storm Warnings in 2021
Winter Storm Warning 11, NWS Riverton, WY
NWS Riverton, WY issued this winter storm warning at Oct 18, 2021, 3:53 AM MDT for 6 counties in Wyoming. It took effect at Oct 19, 2021, 1:00 AM MDT. It was in force for 22 hr. 8 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Oct 18, 2021, 3:53 AM MDT (09:53 UTC)
- In effect from
- Oct 19, 2021, 1:00 AM MDT
- Expired
- Oct 19, 2021, 11:00 PM MDT
- In force
- 22 hr
- Issued by
- NWS Riverton, WY
Counties Big Horn County, WY, Fremont County, WY, Johnson County, WY, Natrona County, WY, Sublette County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 69 km from the middle of the area, began a volume at 09:58 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 19, 7:30 AM MDT | SNOW 4.1 | 6 Sw Lander, WY | COCORAHS STATION WY-FM-21 LANDER 6 SW. |
| Oct 19, 8:00 AM MDT | SNOW 6 | Atlantic City, WY | CO-OP OBSERVER STATION ATLW4 ATLANTIC CITY. |
| Oct 19, 3:45 PM MDT | HEAVY SNOW 19 | 14 Sw Fort Washakie, WY | HOBBS PARK SNOTEL. |
| Oct 19, 3:46 PM MDT | HEAVY SNOW 15 | 6 Wsw Dubois, WY | LITTLE WARM SNOTEL. |
| Oct 19, 3:47 PM MDT | HEAVY SNOW 12 | 10 Nnw South Pass City, WY | DEER PARK SNOTEL. |
| Oct 19, 3:47 PM MDT | HEAVY SNOW 15 | 13 Sw Lander, WY | TOWNSEND CREEK SNOTEL. |
| Oct 19, 3:48 PM MDT | HEAVY SNOW 11 | 15 W Fort Washakie, WY | ST. LAWRENCE ALT. SNOTEL. |
| Oct 19, 3:48 PM MDT | HEAVY SNOW 11 | 7 Nnw South Pass City, WY | SOUTH PASS SNOTEL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 00:00Z, 9.9 hours before the alert went out and 64 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3014 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
740 WWUS45 KRIW 180953 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 353 AM MDT Mon Oct 18 2021 WYZ015-182200- /O.UPG.KRIW.WS.A.0010.211019T0900Z-211020T0000Z/ /O.NEW.KRIW.WS.W.0011.211019T0700Z-211020T0000Z/ Wind River Mountains East- 353 AM MDT Mon Oct 18 2021 ...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 6 PM MDT TUESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 12 to 18 inches with locally higher amounts possible. 6 to 10 inches expected toward South Pass. * WHERE...Wind River Mountains East. * WHEN...From 1 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, including along South Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ008-009-182200- /O.UPG.KRIW.WS.A.0010.211019T0900Z-211020T0500Z/ /O.NEW.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 353 AM MDT Mon Oct 18 2021 ...WINTER STORM WARNING IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow expected. 6 to 12 inches with locally higher amounts of 12 to 18 inches on the southern end of the mountains. Winds could gust as high as 35 mph. * WHERE...Bighorn Mountains West and Bighorn Mountains Southeast. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, especially along Powder River Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-182200- /O.UPG.KRIW.WS.A.0010.211019T0900Z-211020T0500Z/ /O.NEW.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Casper Mountain- 353 AM MDT Mon Oct 18 2021 ...WINTER STORM WARNING IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 12 to 18 inches. * WHERE...Casper Mountain. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult to impossible. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ002-014-182200- /O.NEW.KRIW.WW.Y.0029.211019T0700Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 353 AM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 6 PM MDT TUESDAY... * WHAT...Snow expected. Total snow accumulations of 6 to 8 inches with locally higher amounts possible in the southern end of the range. * WHERE...Absaroka Mountains and Wind River Mountains West. * WHEN...From 1 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ007-182200- /O.NEW.KRIW.WW.Y.0029.211019T0900Z-211020T0000Z/ Owl Creek and Bridger Mountains- 353 AM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 6 PM MDT TUESDAY... * WHAT...Snow expected. Total snow accumulations of 6 to 8 inches. Winds could gust as high as 35 mph. * WHERE...Owl Creek and Bridger Mountains. * WHEN...From 3 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially before sunrise. 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. && $$ WYZ019-182200- /O.EXT.KRIW.WS.A.0010.211019T0900Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 353 AM MDT Mon Oct 18 2021 ...WINTER STORM WATCH NOW IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY EVENING... * WHAT...Heavy snow possible. Total snow accumulations of 4 to 6 inches. 6 to 8 inches near Jeffery City and Beaver Rim, with locally higher amounts possible. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...From late tonight through Tuesday evening. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Temperatures between Jeffrey City and Alcova Reservoir will be highly variable at the start. A rain/snow mix will be possible through late Tuesday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ WYZ020-182200- /O.CON.KRIW.WS.A.0010.211019T0900Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 353 AM MDT Mon Oct 18 2021 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY EVENING... * WHAT...Heavy snow possible. Total snow accumulations of 4 to 8 inches, with locally higher amounts up to 10 inches possible. * WHERE...Natrona County Lower Elevations. * WHEN...From late tonight through Tuesday evening. * IMPACTS...Travel could be very difficult, including along I-25 and in the Casper area. Wet or slushy roads during the day may become very slick and snow covered toward sunset, making travel particularly hazardous. * ADDITIONAL DETAILS...Temperatures across Natrona County will be highly variable at the start of this event. A rain/snow mix or a change over to snow will be possible through late Tuesday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ For more information from the National Weather Service visit http://weather.gov/riw
8 follow-up statements
378 WWUS45 KRIW 182039 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 239 PM MDT Mon Oct 18 2021 WYZ020-191300- /O.UPG.KRIW.WS.A.0010.211019T0900Z-211020T0500Z/ /O.EXA.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 239 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations 4 to 8 inches with local amounts around one foot along and south of Wyoming Boulevard on the south side of Casper. * WHERE...Natrona County Lower Elevations. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult at times, including along I-25, US 20/26 west of Casper, and Wyoming Boulevard. Wet or slushy roads during the day may become very slick and snow covered toward sunset. * ADDITIONAL DETAILS...Temperatures across Natrona County will be highly variable at the start of this event. A rain/snow mix or a change over to snow will be possible through the Tuesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ015-191300- /O.CON.KRIW.WS.W.0011.211019T0700Z-211020T0000Z/ Wind River Mountains East- 239 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TO 6 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations 12 to 18 inches with locally higher amounts possible. Snowfall of 5 to 10 inches expected around South Pass. * WHERE...Wind River Mountains East. * WHEN...From 1 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, including over South Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ008-009-191300- /O.CON.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 239 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations across the southern- third of the Bighorn Range will reach 12 to 16 inches. Widespread totals of 6 to 12 inches. Northerly wind gusting as high as 35 mph. * WHERE...Bighorn Mountains West and Bighorn Mountains Southeast. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, especially on US 16 over Powder River Pass. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest south of US Highway 16, with totals tapering off to just a few inches over the north end of the range near Medicine Wheel and Bald Mountain. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-191300- /O.CON.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Casper Mountain- 239 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations of 12 to 18 inches. * WHERE...Casper Mountain. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...The heaviest snow will fall during the day Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ019-191300- /O.UPG.KRIW.WS.A.0010.211019T0900Z-211020T0500Z/ /O.EXB.KRIW.WW.Y.0029.211019T0900Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 239 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Snow, moderate to heavy at times. Total accumulations of 3 to 6 inches. Local amounts to around 8 inches over Beaver Rim. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Temperatures between Jeffrey City and Alcova Reservoir will be variable early in this storm, with a rain/snow mix possible through sunrise Tuesday. Higher snow totals are expected along US Highway 287 between Sweetwater Station and Lander. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ025-026-191300- /O.EXB.KRIW.WW.Y.0029.211019T0700Z-211019T1800Z/ Upper Green River Basin Foothills-Upper Green River Basin- Including the cities of Pinedale, La Barge, Big Piney, and Farson 239 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO NOON MDT TUESDAY... * WHAT...Snow, with accumulations of 2 to 4 inches. * WHERE...Upper Green River Basin Foothills and Upper Green River Basin. * WHEN...From 1 AM to noon MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially before sunrise. * ADDITIONAL DETAILS...The heaviest snow is expected to fall along US 189 from Big Piney/Marbleton to Daniel. 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. && $$ WYZ002-014-191300- /O.CON.KRIW.WW.Y.0029.211019T0700Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 239 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 6 PM MDT TUESDAY... * WHAT...Snow. Total accumulations of 6 to 8 inches with locally higher amounts around one foot in the southern Absaroka Range. * WHERE...Absaroka Mountains and Wind River Mountains West. * WHEN...From 1 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest at the south end of the range, while totals may only reach a few inches toward the Montana state line. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ007-191300- /O.CON.KRIW.WW.Y.0029.211019T0900Z-211020T0000Z/ Owl Creek and Bridger Mountains- 239 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 6 PM MDT TUESDAY... * WHAT...Snow, with accumulations 4 to 8 inches. Winds could gust as high as 35 mph. * WHERE...Owl Creek and Bridger Mountains. * WHEN...From 3 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially from just before sunrise through the Tuesday morning commute. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
728 WWUS45 KRIW 190345 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 945 PM MDT Mon Oct 18 2021 WYZ015-191230- /O.CON.KRIW.WS.W.0011.211019T0700Z-211020T0000Z/ Wind River Mountains East- 945 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TO 6 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations 12 to 18 inches with locally higher amounts possible. Snowfall of 5 to 10 inches expected around South Pass. * WHERE...Wind River Mountains East. * WHEN...From 1 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, including over South Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ008-009-191230- /O.CON.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 945 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations across the southern- third of the Bighorn Range will reach 10 to 16 inches. Widespread totals of 6 to 12 inches. * WHERE...Bighorn Mountains. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, especially on US 16 over Powder River Pass. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest south of US Highway 16, with totals tapering off to just a few inches over the north end of the range near Medicine Wheel and Bald Mountain. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-191230- /O.CON.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Casper Mountain- 945 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations of 12 to 18 inches. * WHERE...Casper Mountain. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...The heaviest snow will fall during the day Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ020-191230- /O.CON.KRIW.WS.W.0011.211019T0900Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 945 PM MDT Mon Oct 18 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Heavy snow. Total accumulations 4 to 8 inches with local amounts around one foot along and south of Wyoming Boulevard on the south side of Casper. * WHERE...Natrona County Lower Elevations. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult at times, including along I-25, US 20/26 west of Casper, and Wyoming Boulevard. Wet or slushy roads during the day may become very slick and snow covered toward sunset. * ADDITIONAL DETAILS...Temperatures across Natrona County will be highly variable at the start of this event. A rain/snow mix or a change over to snow will be possible through the Tuesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ018-191230- /O.EXB.KRIW.WW.Y.0029.211019T1200Z-211019T2100Z/ Lander Foothills- Including the city of Lander 945 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TO 3 PM MDT TUESDAY... * WHAT...Periods of heavy snow. Total snow accumulations of 4 to 6 inches. Higher amounts possible towards Sinks Canyon. * WHERE...Lander Foothills. * WHEN...From 6 AM to 3 PM MDT Tuesday. * IMPACTS...Roads will likely become slick and slushy Tuesday morning, before becoming mainly wet by early afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ002-014-191230- /O.CON.KRIW.WW.Y.0029.211019T0700Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 945 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 6 PM MDT TUESDAY... * WHAT...Snow. Total accumulations of 6 to 8 inches with locally higher amounts around one foot in the southern Absaroka Range. * WHERE...Absaroka Mountains and Wind River Mountains West. * WHEN...From 1 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest at the south end of the Absaroka Range, while totals may only reach a few inches toward the Montana state line. The heaviest amounts on the west slopes of the Wind River Mountains will be over the south, and along the Divide above 10000 feet. 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. && $$ WYZ007-191230- /O.CON.KRIW.WW.Y.0029.211019T0900Z-211020T0000Z/ Owl Creek and Bridger Mountains- 945 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 6 PM MDT TUESDAY... * WHAT...Snow, with accumulations 5 to 10 inches. * WHERE...Owl Creek and Bridger Mountains. * WHEN...From 3 AM to 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially from just before sunrise through the Tuesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ025-026-191230- /O.CON.KRIW.WW.Y.0029.211019T0700Z-211019T1800Z/ Upper Green River Basin Foothills-Upper Green River Basin- Including the cities of Pinedale, La Barge, Big Piney, and Farson 945 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO NOON MDT TUESDAY... * WHAT...Snow, with accumulations of 2 to 4 inches. * WHERE...Upper Green River Basin Foothills and Upper Green River Basin. * WHEN...From 1 AM to noon MDT Tuesday. * IMPACTS...Slick roads will make travel hazardous during the morning commute. * ADDITIONAL DETAILS...The heaviest snow is expected to fall along US 189 from Big Piney/Marbleton to Daniel. 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. && $$ WYZ019-191230- /O.CON.KRIW.WW.Y.0029.211019T0900Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 945 PM MDT Mon Oct 18 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT TUESDAY... * WHAT...Snow, moderate to heavy at times. Total accumulations of 3 to 6 inches. Local amounts to around 8 inches over Beaver Rim. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...From 3 AM to 11 PM MDT Tuesday. * IMPACTS...Travel could be difficult at times. * ADDITIONAL DETAILS...Temperatures between Jeffrey City and Alcova Reservoir will be variable early in this storm, with a rain/snow mix possible through sunrise Tuesday. Higher snow totals are expected along US Highway 287 between Sweetwater Station and Lander. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ Team Riverton/21
777 WWUS45 KRIW 191137 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 537 AM MDT Tue Oct 19 2021 WYZ015-200000- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0000Z/ Wind River Mountains East- 537 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations 12 to 18 inches with locally higher amounts possible. Snowfall of 5 to 10 inches expected around South Pass. * WHERE...Wind River Mountains East. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, including over South Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ008-009-200000- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 537 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations across the southern- third of the Bighorn Range will reach 10 to 16 inches. Widespread totals of 6 to 12 inches. * WHERE...Bighorn Mountains. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, especially on US 16 over Powder River Pass. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest south of US Highway 16, with totals tapering off to just a few inches over the north end of the range near Medicine Wheel and Bald Mountain. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-200000- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Casper Mountain- 537 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations of 12 to 18 inches. * WHERE...Casper Mountain. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...The heaviest snow will fall during the day Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ020-200000- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 537 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations 8 to 12 inches with local amounts of 12 to 16 inches along and south of Wyoming Boulevard on the south side of Casper. * WHERE...Natrona County Lower Elevations. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult at times, including along I-25, US 20/26 west of Casper, and Wyoming Boulevard. Wet or slushy roads during the day may become very slick and snow covered toward sunset. * ADDITIONAL DETAILS...Temperatures across Natrona County will be highly variable at the start of this event. A rain/snow mix or a change over to snow will be possible through the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ002-014-200000- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 537 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow. Total accumulations of 6 to 8 inches with locally higher amounts around one foot in the southern Absaroka Range. * WHERE...Absaroka Mountains and Wind River Mountains West. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest at the south end of the Absaroka Range, while totals may only reach a few inches toward the Montana state line. The heaviest amounts on the west slopes of the Wind River Mountains will be over the south, and along the Divide above 10000 feet. 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. && $$ WYZ007-200000- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Owl Creek and Bridger Mountains- 537 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow, with accumulations 5 to 10 inches. * WHERE...Owl Creek and Bridger Mountains. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially from just before sunrise through the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ025-026-191800- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211019T1800Z/ Upper Green River Basin Foothills-Upper Green River Basin- Including the cities of Pinedale, La Barge, Big Piney, and Farson 537 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY... * WHAT...Snow, with accumulations of 2 to 4 inches. * WHERE...Upper Green River Basin Foothills and Upper Green River Basin. * WHEN...Through Noon MDT Tuesday. * IMPACTS...Slick roads will make travel hazardous during the morning commute. * ADDITIONAL DETAILS...The heaviest snow is expected to fall along US 189 from Big Piney/Marbleton to Daniel. 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. && $$ WYZ019-200000- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 537 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Snow, moderate to heavy at times. Total accumulations of 3 to 6 inches. Local amounts to around 8 inches over Beaver Rim. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be difficult at times. * ADDITIONAL DETAILS...Temperatures between Jeffrey City and Alcova Reservoir will be variable early in this storm, with a rain/snow mix possible through the early part of the morning. Higher snow totals are expected along US Highway 287 between Sweetwater Station and Lander. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ018-192100- /O.CON.KRIW.WW.Y.0029.211019T1200Z-211019T2100Z/ Lander Foothills- Including the city of Lander 537 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... * WHAT...Periods of heavy snow. Total snow accumulations of 4 to 6 inches. Higher amounts possible towards Sinks Canyon. * WHERE...Lander Foothills. * WHEN...From 6 AM to 3 PM MDT Tuesday. * IMPACTS...Roads will likely become slick and slushy this morning, before becoming mainly wet by early afternoon. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
079 WWUS45 KRIW 191419 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 819 AM MDT Tue Oct 19 2021 WYZ015-192230- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0000Z/ Wind River Mountains East- 819 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations 12 to 18 inches with locally higher amounts possible. Snowfall of 5 to 10 inches expected around South Pass. * WHERE...Wind River Mountains East. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, including over South Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ008-009-192230- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 819 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations across the southern- third of the Bighorn Range will reach 10 to 16 inches. Widespread totals of 6 to 12 inches. * WHERE...Bighorn Mountains. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, especially on US 16 over Powder River Pass. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest south of US Highway 16, with totals tapering off to just a few inches over the north end of the range near Medicine Wheel and Bald Mountain. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-192230- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Casper Mountain- 819 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations of 12 to 18 inches. * WHERE...Casper Mountain. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...The heaviest snow will fall during the day Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ020-192230- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 819 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations 8 to 12 inches with local amounts of 12 to 16 inches along and south of Wyoming Boulevard on the south side of Casper. * WHERE...Natrona County Lower Elevations. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult at times, including along I-25, US 20/26 west of Casper, and Wyoming Boulevard. Wet or slushy roads during the day may become very slick and snow covered toward sunset. * ADDITIONAL DETAILS...Temperatures across Natrona County will be highly variable at the start of this event. A rain/snow mix or a change over to snow will be possible through the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ016-191800- /O.EXA.KRIW.WW.Y.0029.000000T0000Z-211019T1800Z/ Upper Wind River Basin- Including the city of Dubois 819 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON MDT TODAY... * WHAT...Wet snow. Additional snow accumulations of 2 to 4 inches. * WHERE...Upper Wind River Basin near Dubois. * WHEN...Through Noon MDT Tuesday. * IMPACTS...Travel could be difficult at times, due to snow covered and slick roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ002-014-192230- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 819 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow. Total accumulations of 6 to 8 inches with locally higher amounts around one foot in the southern Absaroka Range. * WHERE...Absaroka Mountains and Wind River Mountains West. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest at the south end of the Absaroka Range, while totals may only reach a few inches toward the Montana state line. The heaviest amounts on the west slopes of the Wind River Mountains will be over the south, and along the Divide above 10000 feet. 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. && $$ WYZ007-192230- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Owl Creek and Bridger Mountains- 819 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow, with accumulations 5 to 10 inches. * WHERE...Owl Creek and Bridger Mountains. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially through the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ025-026-191800- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211019T1800Z/ Upper Green River Basin Foothills-Upper Green River Basin- Including the cities of Pinedale, La Barge, Big Piney, and Farson 819 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY... * WHAT...Snow, with accumulations of 2 to 4 inches. * WHERE...Upper Green River Basin Foothills and Upper Green River Basin. * WHEN...Through Noon MDT Tuesday. * IMPACTS...Slick roads will make travel hazardous during the morning commute. * ADDITIONAL DETAILS...The heaviest snow is expected to fall along US 189 from Big Piney/Marbleton to Daniel. 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. && $$ WYZ019-192230- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 819 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Snow, moderate to heavy at times. Total accumulations of 3 to 6 inches. Local amounts to around 8 inches over Beaver Rim. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be difficult at times. * ADDITIONAL DETAILS...Temperatures between Jeffrey City and Alcova Reservoir will be variable early in this storm, with a rain/snow mix possible through the early part of the morning. Higher snow totals are expected along US Highway 287 between Sweetwater Station and Lander. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ018-192100- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211019T2100Z/ Lander Foothills- Including the city of Lander 819 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... * WHAT...Periods of heavy snow. Total snow accumulations of 4 to 6 inches, mainly south of Lander. Higher amounts possible towards Sinks Canyon. * WHERE...Lander Foothills. * WHEN...Through 3 PM MDT Tuesday. * IMPACTS...Travel could be difficult at times due to snow covered roads and poor visibility. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
495 WWUS45 KRIW 191754 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1154 AM MDT Tue Oct 19 2021 WYZ025-026-191900- /O.EXP.KRIW.WW.Y.0029.000000T0000Z-211019T1800Z/ Upper Green River Basin Foothills-Upper Green River Basin- Including the cities of Pinedale, La Barge, Big Piney, and Farson 1154 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MDT TODAY... Snow and precipitation has ended across the area. Thus, the Winter Weather Advisory will be allowed to expire. $$ WYZ016-191900- /O.EXP.KRIW.WW.Y.0029.000000T0000Z-211019T1800Z/ Upper Wind River Basin- Including the city of Dubois 1154 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MDT TODAY... Snow will decrease in the Dubois area in the next hour or two. Minimal additional impacts are expected, with most of the snow have already fallen. Thus will allow the Winter Weather Advisory to expire. $$ WYZ015-200000- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0000Z/ Wind River Mountains East- 1154 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations 12 to 18 inches with locally higher amounts possible. Snowfall of 5 to 10 inches expected around South Pass. * WHERE...Wind River Mountains East. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, including over South Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ008-009-200200- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 1154 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations across the southern- third of the Bighorn Range will reach 10 to 16 inches. Widespread totals of 6 to 12 inches. * WHERE...Bighorn Mountains. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, especially on US 16 over Powder River Pass. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest south of US Highway 16, with totals tapering off to just a few inches over the north end of the range near Medicine Wheel and Bald Mountain. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-200200- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Casper Mountain- 1154 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations of 10 to 20 inches. * WHERE...Casper Mountain. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...The heaviest snow will fall this afternoon and evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ020-200200- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 1154 AM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations 4 to 8 inches with local amounts of 10 to 12 inches along and south of Wyoming Boulevard on the south side of Casper, as well as near 20 Mile Hill. * WHERE...Natrona County Lower Elevations. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult at times, including along I-25, US 20/26 west of Casper, and Wyoming Boulevard. Wet or slushy roads during the day may become very slick and snow covered toward sunset. * ADDITIONAL DETAILS...Temperatures across Natrona County will be highly variable at the start of this event. A rain/snow mix or a change over to snow will be possible through the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ002-014-200000- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 1154 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow. Total accumulations of 6 to 8 inches with locally higher amounts around one foot in the southern Absaroka Range. * WHERE...Absaroka Mountains and Wind River Mountains West. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest at the south end of the Absaroka Range, while totals may only reach a few inches toward the Montana state line. The heaviest amounts on the west slopes of the Wind River Mountains will be over the south, and along the Divide above 10000 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ007-200000- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Owl Creek and Bridger Mountains- 1154 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow, with accumulations 5 to 10 inches. * WHERE...Owl Creek and Bridger Mountains. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially through the morning commute. 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. && $$ WYZ019-200200- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 1154 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Snow, moderate to heavy at times. Total accumulations of 3 to 6 inches. Local amounts to around 8 inches over Beaver Rim. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be difficult at times. * ADDITIONAL DETAILS...Temperatures between Jeffrey City and Alcova Reservoir will be variable early in this storm, with a rain/snow mix possible through the early part of the morning. Higher snow totals are expected along US Highway 287 between Sweetwater Station and Lander. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ018-192100- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211019T2100Z/ Lander Foothills- Including the city of Lander 1154 AM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... * WHAT...Periods of heavy snow. Total snow accumulations of 4 to 6 inches, mainly south of Lander. Higher amounts possible towards Sinks Canyon. * WHERE...Lander Foothills. * WHEN...Through 3 PM MDT Tuesday. * IMPACTS...Travel could be difficult at times due to snow covered roads and poor visibility. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
156 WWUS45 KRIW 192048 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 248 PM MDT Tue Oct 19 2021 WYZ018-192200- /O.EXP.KRIW.WW.Y.0029.000000T0000Z-211019T2100Z/ Lander Foothills- Including the city of Lander 248 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 3 PM MDT THIS AFTERNOON... Precipitation is ending, with light snow south of Lander. No additional impacts are expected, so the Winter Weather Advisory will be allowed to expire. $$ WYZ015-200000- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0000Z/ Wind River Mountains East- 248 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Heavy snow. Estimated snowfall amounts of 10 to 20 inches have fallen so far; 6 to 12 inches near South Pass. Additional accumulations of 1 to 3 inches expected through the afternoon. * WHERE...Wind River Mountains East. * WHEN...Through 6 PM MDT Today. * IMPACTS...Travel could be very difficult, including over South Pass. Mountain recreation is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ008-009-200500- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 248 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations across the southern- third of the Bighorn Range will reach 10 to 16 inches. Widespread totals of 6 to 12 inches. * WHERE...Bighorn Mountains. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult, especially on US 16 over Powder River Pass. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest south of US Highway 16, with totals tapering off to just a few inches over the north end of the range near Medicine Wheel and Bald Mountain. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-200500- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Casper Mountain- 248 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations of 10 to 20 inches. * WHERE...Casper Mountain. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...The heaviest snow will fall this afternoon and evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ020-200500- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 248 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Total accumulations 4 to 8 inches with local amounts of 10 to 12 inches along and south of Wyoming Boulevard on the south side of Casper, as well as near 20 Mile Hill. * WHERE...Natrona County Lower Elevations. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be very difficult at times, including along I-25, US 20/26 west of Casper, and Wyoming Boulevard. Wet or slushy roads during the day may become very slick and snow covered toward sunset. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ002-014-200000- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 248 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow. Total accumulations of 6 to 8 inches with locally higher amounts around one foot in the southern Absaroka Range. * WHERE...Absaroka Mountains and Wind River Mountains West. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest at the south end of the Absaroka Range, while totals may only reach a few inches toward the Montana state line. The heaviest amounts on the west slopes of the Wind River Mountains will be over the south, and along the Divide above 10000 feet. 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. && $$ WYZ007-200000- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Owl Creek and Bridger Mountains- 248 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Snow, with accumulations 5 to 10 inches. * WHERE...Owl Creek and Bridger Mountains. * WHEN...Through 6 PM MDT Tuesday. * IMPACTS...Travel could be very difficult through Wind River Canyon, especially through the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ019-200500- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 248 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Snow, moderate to heavy at times. Total accumulations of 3 to 6 inches. Local amounts to around 8 inches over Beaver Rim. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...Through 11 PM MDT Tuesday. * IMPACTS...Travel could be difficult at times. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
426 WWUS45 KRIW 192351 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 551 PM MDT Tue Oct 19 2021 WYZ015-200100- /O.EXP.KRIW.WS.W.0011.000000T0000Z-211020T0000Z/ Wind River Mountains East- 551 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING... Snow will continue to decrease across the area this evening with little additional accumulation. Accordingly, the Winter Storm Warning will be allowed to expire. $$ WYZ002-014-200100- /O.EXP.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Absaroka Mountains-Wind River Mountains West- 551 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING... Snow will continue to decrease across the area this evening with little additional accumulation. Accordingly, the Winter Weather Advisory will be allowed to expire. $$ WYZ007-200100- /O.EXP.KRIW.WW.Y.0029.000000T0000Z-211020T0000Z/ Owl Creek and Bridger Mountains- 551 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING... Snow will continue to decrease across the area this evening with little additional accumulation. Accordingly, the Winter Weather Advisory will be allowed to expire. $$ WYZ008-009-200500- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 551 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of up to two inches. * WHERE...Bighorn Mountains. * WHEN...Through 11 PM MDT tonight. * IMPACTS...Travel could be very difficult, especially on US 16 over Powder River Pass. Mountain recreation is not recommended. * ADDITIONAL DETAILS...Snowfall will be heaviest south of US Highway 16, with totals tapering off to just a few inches over the north end of the range near Medicine Wheel and Bald Mountain. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ022-200500- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Casper Mountain- 551 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of 2 to 7 inches. * WHERE...Casper Mountain. * WHEN...Through 11 PM MDT tonight. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ020-200500- /O.CON.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 551 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of 1 to 4 inches. * WHERE...Natrona County Lower Elevations. * WHEN...Through 11 PM MDT tonight. * IMPACTS...Travel could be very difficult at times, including along I-25, US 20/26 west of Casper, and Wyoming Boulevard. Wet or slushy roads during the day may become very slick and snow covered toward sunset. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ019-200500- /O.CON.KRIW.WW.Y.0029.000000T0000Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 551 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS EVENING... * WHAT...Wet snow. Additional snow accumulations of up to two inches. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...Through 11 PM MDT tonight. * IMPACTS...Travel could be difficult at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ For more information from the National Weather Service visit http://weather.gov/riw
692 WWUS45 KRIW 200437 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1037 PM MDT Tue Oct 19 2021 WYZ008-009-200545- /O.EXP.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Bighorn Mountains West-Bighorn Mountains Southeast- 1037 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING WILL EXPIRE AT 11 PM MDT THIS EVENING... Light snow will continue, but additional snow accumulations will be minor. Thus the winter storm warning will be allowed to expire at 11 PM. $$ WYZ022-200545- /O.EXP.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Casper Mountain- 1037 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING WILL EXPIRE AT 11 PM MDT THIS EVENING... Light snow will continue, but additional snow accumulations will be minor. Thus the winter storm warning will be allowed to expire at 11 PM. $$ WYZ020-200545- /O.EXP.KRIW.WS.W.0011.000000T0000Z-211020T0500Z/ Natrona County Lower Elevations- Including the city of Casper 1037 PM MDT Tue Oct 19 2021 ...WINTER STORM WARNING WILL EXPIRE AT 11 PM MDT THIS EVENING... Light snow will continue, but additional snow accumulations will be minor. Thus the winter storm warning will be allowed to expire at 11 PM. $$ WYZ019-200545- /O.EXP.KRIW.WW.Y.0029.000000T0000Z-211020T0500Z/ Green Mountains and Rattlesnake Range- Including the cities of Jeffrey City and Bairoil 1037 PM MDT Tue Oct 19 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MDT THIS EVENING... Snow has ended. Thus the winter storm warning will be allowed to expire at 11 PM. $$ 21
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 18, 3:53 AM MDT | Winter Weather Advisory | RIW | Fremont, Hot Springs, Lincoln, Natrona, Park, Sublette and 1 more | 43 hr |
Nearby
Winter Storm Warnings in Wyoming, 2021Every winter storm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.