The National Weather Service Building a Weather-Ready Nation

After a warm start to fall, winter arrived overnight Sunday night into Monday, and brought widespread snow and cold across the Cowboy State. After a warm and at times, breezy weekend, a sharp arctic cold front brought cold and wintry conditions early Monday morning, with moderate to heavy snow experienced across many areas. Most areas had their daily high temperatures occur after midnight on Monday, with temperatures dipping into the single digits to teens by Monday night. A brief lull in snowfall was seen Monday night, before another front brought more snow and cold overnight Monday night into Veteran’s Day. Although snow ended Tuesday afternoon and evening, bitterly cold temperatures remained across the region Wednesday.  The low of 26 below zero at Casper Airport Wednesday morning not only set a daily record low, but is the coldest temperatureever recorded for Casper in the month of November.  This bitter cold low would break record lows through December 4th for Casper.  Climate data for Casper goes back to 1939.  These temperatures are about 50 degrees below normal!  

A composite radar loop starting at 145 AM and ending at 8 AM, Monday morning November 10th. Notice the moderate to heavy snow that develops from the Wind River Basin to Casper as the cold front pushes southward.  – Click to Enlarge	A loop of hourly temperatures starting at 5 PM Sunday, November 9th, and ending at 8 AM. Notice how in 15 hours or less some areas have a 40 to 50 degree temperature change!  – Click to Enlarge

Traffic backed up in the westbound lane of Interstate 80 just east of Rock Springs due to accidents caused by the very slick road conditions. Photo Courtesy of WYDOT

  

 

Snowfall Totals for November 10th and 11th County Location Snowfall Big Horn 26 E Lovell 6 Big Horn Shell Creek Snotel 6 Big Horn Bald Mountain Snotel 5 Big Horn Bone Springs Divide Snotel 4 Big Horn 2 SSW Lovell 2 Big Horn Shell 2 Big Horn Greybull 0.9 Big Horn Basin 0.5 County Location Snowfall Fremont Brooks Lake 13 Fremont 5 WSW Lander 11.3 Fremont Lander Airport 8.1 Fremont Lander 6 to 8 Fremont Little Warm Snotel 7 Fremont Hobbs Park Snotel 7 Fremont Burris 6 Fremont Dubois 6 Fremont Riverton 4 to 6 Fremont 9 SSE Lander 5 Fremont Cold Springs Snotel 5 Fremont Burroughs Creek Snotel 5 Fremont St. Lawrence Alt Snotel 4 Fremont South Pass Snotel 4 Fremont Townsend Creek Snotel 4 Fremont 10 WNW Dubois 3.5 Fremont Castle Creek Snotel 3 Fremont 7 WNW Lander 3 Fremont Hudson 3 Fremont Deer Park Snotel 3 Fremont 6 SE Lander 2.8 Fremont Riverton Airport 2.1 Fremont Jeffrey City 2 Fremont Atlantic City 1.4 Fremont Boysen Dam 0.5 County Location Snowfall Hot Springs Thermopolis 8 to 10 Hot Springs 9 NE Thermopolis 6.9 Hot Springs Owl Creek Snotel 5 Hot Springs Kirby 4.2 Hot Springs Lucerne 3.5 Hot Springs 8 W Thermopolis 3 Hot Springs 20 NW Thermopolis 1 County Location Snowfall Johnson Cloud Peak Reservoir Snotel 11 Johnson 17 NNW Kaycee 9.8 Johnson Hansen Sawmill Snotel 6 Johnson Little Goose Snotel 6 Johnson 17 E Kaycee 4.5 Johnson Soldier Park Snotel 4 Johnson 4 SSW Buffalo 3.5 Johnson Buffalo 2 to 3 Johnson Bear Trap Meadow Snotel 3 County Location Snowfall Lincoln Cottonwood Creek Snotel 10 Lincoln Commissary Ridge 9 Lincoln Willow Creek Snotel 9 Lincoln Spring Creek Divide Snotel 6 Lincoln Blind Bull Summit 6 Lincoln 5 NNE Thayne 4.1 Lincoln Box Y Ranch 3 Lincoln Salt River Summit Snotel 2 Lincoln Star Valley Ranch 2 Lincoln 2 SE Thayne 1.4 Lincoln 5 SSE Smoot 1 Lincoln 3 SE Bedford 1 Lincoln 5 NNE Thayne 1 Lincoln Afton 0.4 County Location Snowfall Natrona 8 W Red Wall 7 Natrona 11 WSW Casper 5 Natrona Casper 4 to 5 Natrona Casper Airport 4.9 Natrona Powder River 4 Natrona Casper Mountain 4 Natrona 11 ESE Casper 3.7 Natrona 10 WSW Casper 3.7 Natrona 5 SSW Casper 3.5 Natrona 4 NE Evansville 3.5 Natrona Casper Mountain 3 Natrona Casper Mountain Snotel 3 Natrona Midwest 2.5 Natrona 2 E Evansville 2 Natrona Grave Spring Snotel 2 Natrona Reno Hill Snotel 2 County Location Snowfall Park Beartooth Highway 9 Park 3 NE Sunshine 8.3 Park Beartooth Lake Snotel 8 Park Kirwin Snotel 8 Park Blackwater Snotel 7 Park Timber Creek Snotel 6 Park 5 ESE Cody 5.5 Park Marquette Snotel 5 Park Meeteetse 4 Park 26 SW Cody 3.5 Park Wolverine Snotel 3 Park Evening Star Snotel 3 Park Pahaska 2 Park Cody 1 to 2 Park 3 NE Clark 1.2 Park 4 SW Powell 0.4 Park 4 ENE Powell 0.2 County Location Snowfall Sublette Triple Peak Snotel 8 Sublette Pinedale 6.9 Sublette New Fork Lake Snotel 6 Sublette Loomis Park Snotel 6 Sublette Daniel Fish Hatchery 5 Sublette Big Sandy Opening Snotel 5 Sublette Pocket Creek Snotel 5 Sublette Larsen Creek Snotel 5 Sublette Gunsite Pass Snotel 5 Sublette 13 SE Pinedale 4.8 Sublette 14 NW Pinedale 4.6 Sublette East Rim Divide Snotel 4 Sublette Elkhart Park G.S. Snotel 3 Sublette 1 N Pinedale 3 Sublette Bondurant 2.6 Sublette Boulder Rearing Station 2 Sublette Kendall Ranger Station Snotel 2 County Location Snowfall Sweetwater Rock Springs 1 to 2 County Location Snowfall Teton Grand Targhee Snotel 17 Teton Togwotee Pass Snotel 13 Teton Grand Targhee-Chief Joseph 12 Teton Jackson Hole-Raymer 11 Teton Jackson Hole-Rendezvous Bowl 11 Teton Togwotee Mountain Lodge 11 Teton 3 SSW Wilson 10.5 Teton 1 NNW Alta 9 Teton Gros Ventre Summit Snotel 7 Teton Phillips Bench Snotel 7 Teton Jackson Hole-Mid 6 Teton 12 NE Jackson 6 Teton Base Camp Snotel 6 Teton Moose 6 Teton Jackson Dam 4.5 Teton Jackson 4.2 Teton Jackson Hole-Base 4 Teton Darwin Ranch 4 Teton Snow King 4 Teton Grassy Lake Snotel 4 Teton 4 SW Jackson 3.6 Teton Snake River Stn Snotel 3 Teton Granite Creek Snotel 2 County Location Snowfall Washakie Powder River Pass Snotel 8 Washakie 5 NNW Ten Sleep 8 Washakie Winchester 6 Washakie Ten Sleep 4 to 6 Washakie 16 SSE Ten Sleep 5.5 Washakie Middle Powder Snotel 5 Washakie Worland 4 Washakie 8 SW Worland 3.5 County Location Snowfall Yellowstone Two Ocean Plateau Snotel 10 Yellowstone Parker Peak Snotel 4 Yellowstone Canyon Snotel 3 Yellowstone Lewis Lake Divide Snotel 3 Yellowstone Tower Falls Ranger Station 2.2 Yellowstone Sylvan Road Snotel 2 Yellowstone Sylvan Lake Snotel 2

Strongest Wind Gusts 11/9 (Sunday) thru 11/11 (Tuesday)

County	Location	Wind Gust (mph)	Date/Time
Park	5 WNW Clark	84	224 PM 11/09
Park	Chief Joseph HWY (Dead Indian Pass)	70	1050 AM 11/09
Big Horn	Greybull Airport	66	124 AM 11/10
Natrona	16 S Hiland	64	310 PM 11/09
Fremont	Red Canyon – HWY 28	63	735 PM 11/09
Park	8 S Clark – HWY 120	63	230 PM 11/09
Johnson	Buffalo Airport	60	257 AM 11/10
Natrona	Casper – Outer Drive	59	1026 AM 11/09
Park	8 N Meeteetse	57	1246 AM 11/10
Sweetwater	Interstate 80 – MM 142	57	400 AM 11/10
Sweetwater	Farson	55	255 AM 11/10
Park	Powell Airport	54	115 AM 11/10
Lincoln	Kemmerer Airport	52	240 AM 11/10
Fremont	Lander Airport	49	243 AM 11/10
Fremont	Riverton Airport	49	433 AM 11/10
Sublette	Big Piney Airport	49	827 PM 11/09

    

Many areas saw a temperature change of 46 to 56 degrees in less than 24 hours as an arctic front blasted through the state. See the table above for details at select locations.

  

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Click on Image to Enlarge.