*UPDATED* Widespread snow expected for much of central & southwest WY

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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.


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.



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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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