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Summary | Forecast | Monitoring & Reporting Snowfall | Safety

A potent winter storm continues to bring widespread snow to the forecast area. A low pressure center will continue to track northeast into northern Colorado and will eventually eject out into the Central Plains by Sunday morning. At this time, this has the potential to bring significant snowfall across all but northwestern Wyoming. A second system will drop southward over the area from Canada Sunday night, bringing very cold air with it. With a fresh blanket of snow over the area, very frigid temperatures are possible to start the work week next week. In addition, northerly winds will pick up for a period tonight into Sunday morning as the cold front drops south, leading to areas of blowing and drifting snow across the I-25 corridor, the Bighorn Basin, through the Owl Creeks including Wind River Pass, and across the Wind River Range including South Pass.

Latest Satellite Analysis (9am Sat)

CLICK LOOP TO ENLARGE The above image shows a loop of the Water Vapor Satellite Imagery from early this morning. It shows a "dry slot" moving north across Sweetwater and Fremont Counties this morning eventually filling in a bit and being pushed off to the west by a slug of moist air (magenta and teal shades represent more moisture-laden air). What does this mean for you: Increased snow intensity across the areas located underneath the areas of increased moisture for the next couple of hours.

CLICK IMAGE TO VIEW DISCUSSION & TO ENLARGE The above image was produced by NOAA's NESDIS Satellite Analysis Division. A lengthy discussion about the clues that the satellite imagery is giving to the analysts about where the strongest precipitation will be over the next few hours accompanies the image. If you would like to read it, please click on the above image.

A Winter Storm Warnings and Winter Weather Advisories continue through at least Sunday morning for much of the forecast area. Click on the link for more details.

For more information on the storm, take a look at the latest Multimedia Weather Briefing.

Precipitation amounts from across the area will be updated here or here as we receive more reports.

Model guidance with this storm has been fairly consistent this week and remains so today. The left picture below is the 12Z snowfall forecast from Saturday's NAM. The right picture is the preliminary snowfall forecast for Friday night through Tonight. Again, this is just a basic range as certain factors with this storm can change amounts and locations of snowfall as heavier bands set up.

 

CLICK LOOP TO ENLARGE The above animation shows the 3 hourly snow accumulation from the NAM model. The loop begins at 12Z Saturday (or 5am) and ends at 06Z Monday (or 11pm Sunday) Image Key: Light Purple = Less than 1 inch of snow accumulation during the 3hr period Gray = 1 to 2 inches Yellow = 2 to 3 inches Blue = 3 to 6 inches	CLICK IMAGE TO ENLARGE This picture shows roughly how much snow you can expect where you live.

 

 

CLICK IMAGES TO ENLARGE Above is the climate data from Casper, Lander and Riverton from February 2006. Please not the temperatures and precipitation/snow between the 13th and 20th. These locations received very decent snowfall amounts, followed by very frigid temperatures. This could be a scenario we see this weekend into early next week.

 

 Snowfall reports continue to stream into the NWS office in Riverton this evening. A table with current snowfall amounts is included below. Please feel free to call in with your snowfall amounts, or utilize our social media on Facebook and/or Twitter to submit reports.

 

Snowfall Through 5pm

County	Station Name	Snowfall
Big Horn	Bone Springs Divide Snotel	1
Fremont	3 SW Lander	10-13.5
Fremont	Lander Airport	12
Fremont	Lander	8-12
Fremont	9 SSE Lander	10.75
Fremont	6 SE Lander	10
Fremont	Townsend Creek Snotel	9
Fremont	Riverton	4-8.5
Fremont	St. Lawrence Alt Snotel	8
Fremont	Deer Park Snotel	7
Fremont	2 NE Kinnear	7
Fremont	South Pass Snotel	7
Fremont	Hudson	7
Fremont	Cold Springs Snotel	6
Fremont	Dubois	6
Fremont	1 E Morton	5.5
Fremont	Riverton ASOS	5
Fremont	Little Warm Snotel	5
Fremont	2 E Sweetwater Station	5
Fremont	Jeffrey City	5
Fremont	Hobbs Park Snotel	4
Fremont	Dubois	4
Fremont	10 NNE Riverton	3.3
Fremont	Burroughs Creek Snotel	3
Fremont	Burris	0.5
Hot Springs	Owl Creek Snotel	5
Hot Springs	Thermopolis	3-4
Hot Springs	8 W Thermopolis	1.5
Hot Springs	9 NE Thermopolis	1.4
Johnson	Cloud Peak Reservoir Snotel	4
Johnson	Bear Trap Meadow Snotel	3
Johnson	Hansen Sawmill Snotel	2
Johnson	Soldier Park Snotel	2
Lincoln	Spring Creek Divide Snotel	10
Lincoln	Cokeville	8
Lincoln	Box Y Ranch	7
Lincoln	Fossil Butte	6.8
Lincoln	Indian Creek Snotel	6
Lincoln	Salt River Summit Snotel	5
Lincoln	Hams Fork Snotel	5
Lincoln	Smoot	4.75
Lincoln	5 SSE Smoot	4
Lincoln	Turnerville	4
Lincoln	21 NNW Kemmerer	4
Lincoln	Commissary Ridge	4
Lincoln	Cottonwood Creek Snotel	4
Lincoln	Afton	1-3.2
Lincoln	Willow Creek Snotel	3
Lincoln	Blind Bull Summit	3
Lincoln	Kelley Ranger Station Snotel	3
Lincoln	Blind Bull Summit Snotel	3
Lincoln	2 SE Thayne	2
Lincoln	Kemmerer	2
Natrona	Grave Spring Snotel	3
Natrona	Casper Mountain Snotel	3
Natrona	Casper Mountain	2-3
Natrona	Casper Airport	2.5
Natrona	Reno Hill Snotel	2
Park	Marquette Snotel	5
Park	Timber Creek Snotel	4
Park	Evening Star Snotel	2
Park	Kirwin Snotel	2
Park	Wolverine Snotel	1
Park	Blackwater Snotel	1
Sublette	Triple Peak Snotel	11
Sublette	Snider Basin Snotel	9
Sublette	East Rim Divide Snotel	4
Sublette	New Fork Lake Snotel	4
Sublette	14 NW Pinedale	4
Sublette	Loomis Park Snotel	3
Sublette	White Pine Ski Area	2.5
Sublette	Marbleton	2
Sublette	Kendall Ranger Station Snotel	1
Sublette	Elkhart Park G.S. Snotel	1
Sublette	Gunsite Pass Snotel	1
Sublette	Boulder Rearing Station	0.5
Sweetwater	Wamsutter	8
Sweetwater	Buckboard Marina	1
Sweetwater	1 S Rock Springs	0.2
Sweetwater	Green River	0.1
Sweetwater	1 W Rock Springs	0.1
Teton	Snake River Stn Snotel	2
Teton	Jackson Hole-Raymer	2
Teton	3 SSW Wilson	1.7
Teton	Jackson Hole-Rendezvous Bowl	1
Teton	Granite Creek Snotel	1
Teton	Togwotee Pass Snotel	1
Teton	Snow King Ski Area	1
Teton	Moose	0.5
Teton	Jackson	0.5
Teton	2 NE Teton Village	0.3
Washakie	16 SSE Ten Sleep	4
Washakie	27 S Ten Sleep	2
Washakie	5 NNW Ten Sleep	1.2
Washakie	Powder River Pass Snotel	1
Washakie	Middle Powder Snotel	1

 

 

 

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