Alert archive / Wyoming / Winter Storm Warnings in 2021
Winter Storm Warning 6, NWS Riverton, WY
NWS Riverton, WY issued this winter storm warning at Mar 9, 2021, 3:09 AM MST for Johnson County, Natrona County, Wyoming. It took effect at Mar 9, 2021, 8:00 PM MST. It was in force for 21 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 9, 2021, 3:09 AM MST (10:09 UTC)
- In effect from
- Mar 9, 2021, 8:00 PM MST
- Expired
- Mar 10, 2021, 5:00 PM MST
- In force
- 21 hr
- Issued by
- NWS Riverton, WY
Counties Johnson County, WY, Natrona County, WY
The radar
The Riverton/Lander radar (KRIW), 152 km from the middle of the area, began a volume at 10:14 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.
The nearest sounding before it
Riverton, WY (KRIW), launched 00:00Z, 10.2 hours before the alert went out and 146 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
- 3175 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
655 WWUS45 KRIW 091009 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 309 AM MST Tue Mar 9 2021 ...Significant Snowfall Expected Tonight and Wednesday... .A weather system will move northeast across Wyoming late this afternoon through Wednesday. Colder temperatures and widespread snow are expected in areas along and east of the Continental Divide. WYZ011-020-100000- /O.UPG.KRIW.WS.A.0003.210310T0300Z-210311T0000Z/ /O.NEW.KRIW.WS.W.0006.210310T0300Z-210311T0000Z/ Southeast Johnson County-Natrona County Lower Elevations- Including the cities of Kaycee and Casper 309 AM MST Tue Mar 9 2021 ...WINTER STORM WARNING IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 6 to 9 inches. * WHERE...Southeast Johnson County and Natrona County Lower Elevations. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...Interstate 25 and other major highways will be impacted by this storm. Allow extra time to reach your destination.. 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. && $$ WYZ019-022-100000- /O.UPG.KRIW.WS.A.0003.210310T0300Z-210311T0000Z/ /O.NEW.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Green Mountains and Rattlesnake Range-Casper Mountain- Including the city of Jeffrey City 309 AM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 7 inches, with localized ares up to 9 inches in the eastern Green Mountains. Casper Mountain will see 7 to 11 inches. * WHERE...Green Mountains and Rattlesnake Range and Casper Mountain. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ015-100000- /O.UPG.KRIW.WS.A.0003.210310T0300Z-210311T0000Z/ /O.NEW.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Wind River Mountains East- 309 AM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 6 to 10 inches. * WHERE...Wind River Mountains East. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...The Red Canyon area up to South Pass will be impacted by this storm. Allow extra time to reach your destination. 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. && $$ WYZ018-100000- /O.UPG.KRIW.WS.A.0003.210310T0300Z-210311T0000Z/ /O.NEW.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Lander Foothills- Including the city of Lander 309 AM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 6 inches. * WHERE...Lander Foothills. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...The Red Canyon area up to South Pass will be impacted by this storm. Allow extra time to reach your destination. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ007>009-100000- /O.UPG.KRIW.WS.A.0003.210310T0300Z-210311T0000Z/ /O.NEW.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Owl Creek and Bridger Mountains-Bighorn Mountains West- Bighorn Mountains Southeast- 309 AM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 10 inches. * WHERE...Owl Creek and Bridger Mountains, Bighorn Mountains West and Bighorn Mountains Southeast. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Travel could be very difficult at time over Granite and Powder River passes. The hazardous conditions would impact travelers in the Bighorn Range. * ADDITIONAL DETAILS...Allow extra time to reach your destination. 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. && $$ WYZ010-100000- /O.UPG.KRIW.WS.A.0003.210310T0300Z-210311T0000Z/ /O.NEW.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Northeast Johnson County- Including the city of Buffalo 309 AM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 3 inches. * WHERE...Northeast Johnson County. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...Interstates 25 and 90, as well as other major highways, will be impacted by this storm. Allow extra time to reach your destination. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ016-017-100000- /O.NEW.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Upper Wind River Basin-Wind River Basin- Including the cities of Dubois, Riverton, and Shoshoni 309 AM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. * WHERE...Wind River Basin. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...Allow extra time to reach your destination. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
4 follow-up statements
835 WWUS45 KRIW 092128 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 228 PM MST Tue Mar 9 2021 ...Significant Snowfall Expected Tonight and Wednesday... .A weather system is still on-track to produce widespread accumulating snow late this evening through at least midday Wednesday along and east of the Continental Divide. WYZ011-020-101400- /O.CON.KRIW.WS.W.0006.210310T0300Z-210311T0000Z/ Southeast Johnson County-Natrona County Lower Elevations- Including the cities of Kaycee and Casper 228 PM MST Tue Mar 9 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 6 to 9 inches. * WHERE...Lower elevations of Natrona County and far southern Johnson County. * WHEN...8 PM Tuesday to 5 PM MST Wednesday. The heaviest snow will fall between 11 PM Tuesday and 9 AM Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...Interstate 25 and other major highways will be impacted by this storm. Allow extra time to reach your destination. Conditions should improve around midday Wednesday as snowfall rates slow down. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ019-022-101400- /O.CON.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Green Mountains and Rattlesnake Range-Casper Mountain- Including the city of Jeffrey City 228 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 4 to 8 inches. Casper Mountain could see totals around one foot. * WHERE...Casper Mountain, and the Green Mountains and Rattlesnake Range. * WHEN...8 PM Tuesday to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...US 287 and Wyoming Highway 220 will be impacted by this storm. Allow extra time to reach your destination. Conditions should improve around midday Wednesday as snowfall rates slow down. 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. && $$ WYZ015-101400- /O.CON.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Wind River Mountains East- 228 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 6 to 10 inches. * WHERE...Wind River Mountains East. * WHEN...8 PM Tuesday to 5 PM MST Wednesday. * IMPACTS...Plan on slick and snow covered road conditions over South Pass. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...Wyoming Highway 28 from Red Canyon over South Pass will be impacted by this storm. Allow extra time to reach your destination. Conditions should improve around midday Wednesday as snowfall rates slow down. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ016>018-101400- /O.CON.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Upper Wind River Basin-Wind River Basin-Lander Foothills- Including the cities of Dubois, Riverton, Shoshoni, and Lander 228 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 3 to 5 inches. Locally higher totals up to 8 inches in the foothills of the Wind River Range. * WHERE...Wind River Basin. * WHEN...8 PM Tuesday to 5 PM MST Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...Allow extra time to reach your destination. Travel conditions should improve around midday Wednesday as snowfall rates slow down and temperatures warm slightly. 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. && $$ WYZ007>009-101400- /O.CON.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Owl Creek and Bridger Mountains-Bighorn Mountains West- Bighorn Mountains Southeast- 228 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 5 to 10 inches. The heaviest amounts will fall on the east facing slopes of the Bighorn Range. * WHERE...Owl Creek and Bridger Mountains, Bighorn Mountains West, and Bighorn Mountains Southeast. * WHEN...8 PM Tuesday to 5 PM MST Wednesday. * IMPACTS...Travel could be very difficult at times over Granite and Powder River passes impacting travelers crossing the Bighorn Range. Road conditions will be slick through Wind River Canyon on the Wednesday morning commute. * ADDITIONAL DETAILS...Allow extra time to reach your destination. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ010-101400- /O.CON.KRIW.WW.Y.0018.210310T0300Z-210311T0000Z/ Northeast Johnson County- Including the city of Buffalo 228 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 2 to 4 inches. * WHERE...Northeast Johnson County. * WHEN...8 PM Tuesday to 5 PM MST Wednesday. The best chance for snow will come after midnight Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...Interstates 25 and 90, as well as other major highways, will be impacted by this storm. Allow extra time to reach your destination. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
859 WWUS45 KRIW 100317 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 817 PM MST Tue Mar 9 2021 ...Significant Snowfall Tonight and Wednesday... .A weather system will bring significant snowfall to central Wyoming tonight and Wednesday. The heaviest snow will occur between midnight and 9 AM. WYZ011-020-101300- /O.CON.KRIW.WS.W.0006.000000T0000Z-210311T0000Z/ Southeast Johnson County-Natrona County Lower Elevations- Including the cities of Kaycee and Casper 817 PM MST Tue Mar 9 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 6 to 9 inches. * WHERE...Lower elevations of Natrona County and far southern Johnson County. * WHEN...Now until 5 PM Wednesday. The heaviest snow will fall between midnight and 9 AM Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions including Interstate 25. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling as it could lead to serious health conditions. Allow extra time to reach your destination. Conditions should improve around midday Wednesday as snowfall rates slow down. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ019-022-101300- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Green Mountains and Rattlesnake Range-Casper Mountain- Including the city of Jeffrey City 817 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 4 to 8 inches. Casper Mountain could see totals around one foot. * WHERE...Casper Mountain, and the Green Mountains and Rattlesnake Range. * WHEN...Now until 5 PM Wednesday. The heaviest snow will occur from midnight through 9 AM. * IMPACTS...Plan on slippery or snow covered road conditions including US 287 and Wyoming 220. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling as it could lead to serious health conditions. Allow extra time to reach your destination. Conditions should improve around midday Wednesday as snowfall rates slow down. 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. && $$ WYZ015-101300- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Wind River Mountains East- 817 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 6 to 10 inches. * WHERE...Wind River Mountains East. * WHEN...Now until 5 PM Wednesday. The heaviest snow is expected between midnight and 9 AM. * IMPACTS...Plan on slick and snow covered road conditions over South Pass. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...Wyoming Highway 28 from Red Canyon over South Pass will be impacted by this storm. Allow extra time to reach your destination. Conditions should improve around midday Wednesday as snowfall rates slow down. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ016>018-101300- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Upper Wind River Basin-Wind River Basin-Lander Foothills- Including the cities of Dubois, Riverton, Shoshoni, and Lander 817 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 3 to 5 inches. Locally higher totals up to 8 inches in the foothills of the Wind River Range. * WHERE...Wind River Basin. * WHEN...Now until 5 PM Wednesday. The heaviest snowfall will occur between Midnight and 9 AM. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling as it could lead to serious health conditions. Allow extra time to reach your destination. Travel conditions should improve around midday Wednesday as snowfall rates slow down and temperatures warm slightly. 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. && $$ WYZ007>009-101300- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Owl Creek and Bridger Mountains-Bighorn Mountains West- Bighorn Mountains Southeast- 817 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 5 to 10 inches. The heaviest amounts will fall on the east facing slopes of the Bighorn Range. * WHERE...Owl Creek and Bridger Mountains, Bighorn Mountains West, and Bighorn Mountains Southeast. * WHEN...Now until 5 PM Wednesday. * IMPACTS...Travel could be very difficult at times over Granite and Powder River passes impacting travelers crossing the Bighorn Range. Road conditions will be slick through Wind River Canyon on the Wednesday morning commute. * ADDITIONAL DETAILS...Allow extra time to reach your destination. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ010-101300- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Northeast Johnson County- Including the city of Buffalo 817 PM MST Tue Mar 9 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Snow with total accumulations of 2 to 4 inches. * WHERE...Northeast Johnson County. * WHEN...Now until 5 PM Wednesday. The heaviest snow is expected to occur between midnight and 9 AM. * IMPACTS...Plan on slippery or snow covered road conditions including Interstates 25 and 90. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling as it could lead to serious health conditions. Allow extra time to reach your destination. 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. && $$ Team Riverton/21
560 WWUS45 KRIW 101011 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 311 AM MST Wed Mar 10 2021 ...Significant Snowfall Through this Afternoon... .A weather system will continue to produce significant snowfall over central Wyoming through this afternoon. WYZ011-020-110000- /O.CON.KRIW.WS.W.0006.000000T0000Z-210311T0000Z/ Southeast Johnson County-Natrona County Lower Elevations- Including the cities of Kaycee and Casper 311 AM MST Wed Mar 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Heavy snow. Additional snow accumulations of 4 to 6 inches. Winds gusting 25 to 35 mph. * WHERE...Lower elevations of Natrona County and far southern Johnson County. * WHEN...Now until 5 PM Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions including Interstate 25. The hazardous conditions will impact the morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling. Allow extra time to reach your destination. Conditions should improve around midday as snowfall rates slow down. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ019-022-110000- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Green Mountains and Rattlesnake Range-Casper Mountain- Including the city of Jeffrey City 311 AM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations of 2 to 4 inches. Winds gusting as high as 35 mph. * WHERE...Casper Mountain, and the Green Mountains and Rattlesnake Range. * WHEN...Now until 5 PM Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions including US 287 and Wyoming 220. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling. Allow extra time to reach your destination. Conditions should improve around midday as snowfall rates slow down. 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. && $$ WYZ015-110000- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Wind River Mountains East- 311 AM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches. * WHERE...Wind River Mountains East. * WHEN...Now until 5 PM Wednesday. * IMPACTS...Plan on slick and snow covered road conditions over South Pass. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...Wyoming Highway 28 from Red Canyon over South Pass will be impacted by this storm. Allow extra time to reach your destination. Conditions should improve around midday as snowfall rates slow down. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ016>018-110000- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Upper Wind River Basin-Wind River Basin-Lander Foothills- Including the cities of Dubois, Riverton, Shoshoni, and Lander 311 AM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations of 2 to 3 inches. * WHERE...Wind River Basin. * WHEN...Now until 5 PM Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions. The hazardous conditions would impact the Wednesday morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling. Allow extra time to reach your destination. Conditions should improve around midday as snowfall rates slow down and temperatures warm slightly. 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. && $$ WYZ007>009-110000- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Owl Creek and Bridger Mountains-Bighorn Mountains West- Bighorn Mountains Southeast- 311 AM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches. * WHERE...Owl Creek and Bridger Mountains, Bighorn Mountains West, and Bighorn Mountains Southeast. * WHEN...Now until 5 PM Wednesday. * IMPACTS...Travel could be very difficult at times over Granite and Powder River passes impacting travelers crossing the Bighorn Range. Road conditions will be slick through Wind River Canyon on the morning commute. * ADDITIONAL DETAILS...Allow extra time to reach your destination. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ010-110000- /O.CON.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Northeast Johnson County- Including the city of Buffalo 311 AM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches. * WHERE...Northeast Johnson County. * WHEN...Now until 5 PM Wednesday. * IMPACTS...Plan on slippery or snow covered road conditions including Interstates 25 and 90. The hazardous conditions will impact the Wednesday morning commute. * ADDITIONAL DETAILS...The snow will be heavy and wet. Please do not overexert yourself when shoveling. Allow extra time to reach your destination. 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. && $$ For more information from the National Weather Service visit http://weather.gov/riw
033 WWUS45 KRIW 102344 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 444 PM MST Wed Mar 10 2021 WYZ011-020-110045- /O.EXP.KRIW.WS.W.0006.000000T0000Z-210311T0000Z/ Southeast Johnson County-Natrona County Lower Elevations- Including the cities of Kaycee and Casper 444 PM MST Wed Mar 10 2021 ...WINTER STORM WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON... Snow has ended across the area. Although light snow may remain possible this evening, any additional accumulation will be little to none. $$ WYZ019-022-110045- /O.EXP.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Green Mountains and Rattlesnake Range-Casper Mountain- Including the city of Jeffrey City 444 PM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON... Snow has ended across the area. Although light snow may remain possible this evening, any additional accumulation will be little to none. $$ WYZ015-110045- /O.EXP.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Wind River Mountains East- 444 PM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON... Snow has ended across the area. Although light snow may remain possible this evening, any additional accumulation will be little to none. $$ WYZ016>018-110045- /O.EXP.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Upper Wind River Basin-Wind River Basin-Lander Foothills- Including the cities of Dubois, Riverton, Shoshoni, and Lander 444 PM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON... Snow has ended across the area. Although light snow may remain possible this evening, any additional accumulation will be little to none. $$ WYZ007>009-110045- /O.EXP.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Owl Creek and Bridger Mountains-Bighorn Mountains West- Bighorn Mountains Southeast- 444 PM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON... Snow has ended across the area. Although light snow may remain possible this evening, any additional accumulation will be little to none. $$ WYZ010-110045- /O.EXP.KRIW.WW.Y.0018.000000T0000Z-210311T0000Z/ Northeast Johnson County- Including the city of Buffalo 444 PM MST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON... Snow has ended across the area. Although light snow may remain possible this evening, any additional accumulation will be little to none. $$ For more information from the National Weather Service visit http://weather.gov/riw
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 3:09 AM MST | Winter Weather Advisory | RIW | Big Horn, Fremont, Hot Springs, Johnson, Natrona, Sublette and 2 more | 38 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.