Western and Central Wyoming

Weather Forecast Office

Winter Storm Keeps Moving Eastward, Impacting Central Areas through Early Evening

SYNOPSIS:

A potent winter storm is impacting the region today. Winter Storm Warnings still in effect for Cody and Buffalo until 5 pm this evening. Winter Weather Advisories have also been issued for other areas of the state. Treacherous travel conditions with near zero visibility could occur along Interstate 80 Saturday morning when a heavy band of snow combined with strong wind is expected to track across the area (see radar simulation below). The snow has spread to areas east of the Divide. The heaviest snow is expected along Interstate 25 from Buffalo to Casper through Saturday afternoon. The snow tapers off or becomes very light across the west by early Saturday afternoon while the snow east of the Divide should exit the area late Saturday night. Windy conditions on Saturday could cause significant blowing and drifting of snow.

IMPACTS:

Western roads remaining slick and hazardous especially in the morning.
Interstate 80 could see white-out conditions Saturday morning from continued snowfall, and strong wind creating significant blowing snow.
Roads east of the Divide will gradually become slick in most locations. Travel will become difficult, especially along Interstate 25 between Casper and Buffalo by Saturday afternoon.

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NWS Text Products and Forecasts

Area Forecast Discussion	Winter Weather Statement	Special Weather Statement	What's a "Watch?"
Observed Snow Totals or High Wind	High Wind Statement	Weather Story	What's a "Watch?"

Quick View of Hazards, Simulated Radar Imagery, and Forecast Snow Totals (created at 12 PM 11/24)
Click Images To Enlarge

Winter Storm Warnings and Winter Weather Advisories are in effect for much of western and southern Wyoming

Current Radar Loop
Click Images To Enlarge

Radar simulation of timing of snow beginning
at 2 AM Saturday until midnight Saturday night. The
darker blue shades represent heavier snow.
***Note the heavier
band of snow moving along Interstate 80 between 4 am
and 8 am Saturday when near zero visibility in heavy
snow and blowing snow are likely.***

Snow and Wind Forecasts for Saturday
Click Images To Enlarge


Forecast Additional Snowfall from 5 AM until Midnight Saturday	Saturday's Peak Wind Gusts

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Snow Totals and Wind Reports will be posted and updated here once the storm occurs (Please double check date and time of product)
196 NOUS45 KRIW 191816 PNSRIW WYZ001>020-022>030-200556- Public Information Statement National Weather Service Riverton WY 1156 AM MDT Tue May 19 2026 ...SNOWFALL REPORTS... A late-season winter storm impacted central and southern Wyoming the night of May 17th through the day of May 18th. The heaviest snow fell between about 2am and 10am MDT. The largest totals were for upslope favored locations like the Lander Foothills, southern Casper and Casper Mountain, as well for locations between South Pass and Jeffrey City and south into eastern Sweetwater County, especially for Interstate 80 east of Rock Springs. Totals of 8 inches or more were seen in the mentioned locations, with around a foot of snow over South Pass and around 20 inches on Casper Mountain. Reports for Sinks Canyon Park near Lander were near 12 inches, with around 19 inches at the top of the switchbacks. Listed below are snowfall reports from this event. Location Amount Elevation (ft.) ...Wyoming... ...Fremont County... 5 SW Lander 16.0 in 5976 13 SW Lander 14.0 in 8725 6 SW Lander 13.8 in 6043 Sinks Canyon Park 12.0 in 10 NNW South Pass City 12.0 in 9659 9 S Lander 11.4 in 5996 11 WSW Burris 11.0 in 9903 2 SSE Lander 8.8 in 5517 14 SW Fort Washakie 8.0 in 10065 Jeffrey City 8.0 in 4 WSW Lander 7.0 in 5754 7 WNW Lander 6.3 in 6040 6 WSW Dubois 5.0 in 9411 2 NNW Lander 5.0 in 5340 15 W Fort Washakie 3.0 in 8444 1 WNW Dubois 3.0 in 6955 6 WNW Riverton 0.3 in 5570 2 W Riverton 0.1 in 5070 ...Hot Springs County... 18 ESE Lucerne 2.7 in 4874 ...Johnson County... 8 NNE Mayoworth 1.8 in 5058 3 SSW Mayoworth 0.8 in 5477 ...Lincoln County... Afton 1.8 in 6255 3 N Etna 1.6 in 5927 1 SE Thayne 1.3 in 6071 4 NNE Thayne 1.0 in 6248 Afton 0.2 in 6229 ...Natrona County... 7 S Casper 22.0 in 8070 12.8 SSE Milles 21.0 in 22 SE Casper 18.0 in 8402 Southern Casper 8.0 in 1 WSW Casper 7.0 in 5199 1 E Casper 6.1 in 5280 5 W Mills 3.0 in 5351 4 NW Mills 2.5 in 5278 ...Park County... Pahaska 3.0 in 6687 ...Sublette County... 5 SE Pinedale 1.5 in 7137 1 NNW Pinedale 1.2 in 7204 3 W Boulder 1.0 in 6944 ...Sweetwater County... 1 NNW Green River 3.5 in 6097 1 SSW Green River 2.5 in 6309 2 SSE Green River 1.6 in 6203 ...Teton County... Kelly 0.5 in 6652 3 SSW Wilson 0.2 in 6996 1 NNE Jackson Trace 6226 Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official. $$

Snow Totals and Wind Reports will be posted and updated here once the storm occurs
(Please double check date and time of product)

                        
196
NOUS45 KRIW 191816
PNSRIW
WYZ001>020-022>030-200556-

Public Information Statement
National Weather Service Riverton WY
1156 AM MDT Tue May 19 2026

...SNOWFALL REPORTS...

A late-season winter storm impacted central and southern Wyoming the
night of May 17th through the day of May 18th. The heaviest snow
fell between about 2am and 10am MDT. The largest totals were for
upslope favored locations like the Lander Foothills, southern Casper
and Casper Mountain, as well for locations between South Pass and
Jeffrey City and south into eastern Sweetwater County, especially
for Interstate 80 east of Rock Springs. Totals of 8 inches or more
were seen in the mentioned locations, with around a foot of snow
over South Pass and around 20 inches on Casper Mountain. Reports for
Sinks Canyon Park near Lander were near 12 inches, with around 19
inches at the top of the switchbacks. Listed below are snowfall
reports from this event.

Location                     Amount     Elevation (ft.)

...Wyoming...

...Fremont County...
5 SW Lander                  16.0 in    5976
13 SW Lander                 14.0 in    8725
6 SW Lander                  13.8 in    6043
Sinks Canyon Park            12.0 in
10 NNW South Pass City       12.0 in    9659
9 S Lander                   11.4 in    5996
11 WSW Burris                11.0 in    9903
2 SSE Lander                 8.8 in     5517
14 SW Fort Washakie          8.0 in     10065
Jeffrey City                 8.0 in
4 WSW Lander                 7.0 in     5754
7 WNW Lander                 6.3 in     6040
6 WSW Dubois                 5.0 in     9411
2 NNW Lander                 5.0 in     5340
15 W Fort Washakie           3.0 in     8444
1 WNW Dubois                 3.0 in     6955
6 WNW Riverton               0.3 in     5570
2 W Riverton                 0.1 in     5070

...Hot Springs County...
18 ESE Lucerne               2.7 in     4874

...Johnson County...
8 NNE Mayoworth              1.8 in     5058
3 SSW Mayoworth              0.8 in     5477

...Lincoln County...
Afton                        1.8 in     6255
3 N Etna                     1.6 in     5927
1 SE Thayne                  1.3 in     6071
4 NNE Thayne                 1.0 in     6248
Afton                        0.2 in     6229

...Natrona County...
7 S Casper                   22.0 in    8070
12.8 SSE Milles              21.0 in
22 SE Casper                 18.0 in    8402
Southern Casper              8.0 in
1 WSW Casper                 7.0 in     5199
1 E Casper                   6.1 in     5280
5 W Mills                    3.0 in     5351
4 NW Mills                   2.5 in     5278

...Park County...
Pahaska                      3.0 in     6687

...Sublette County...
5 SE Pinedale                1.5 in     7137
1 NNW Pinedale               1.2 in     7204
3 W Boulder                  1.0 in     6944

...Sweetwater County...
1 NNW Green River            3.5 in     6097
1 SSW Green River            2.5 in     6309
2 SSE Green River            1.6 in     6203

...Teton County...
Kelly                        0.5 in     6652
3 SSW Wilson                 0.2 in     6996
1 NNE Jackson                 Trace      6226

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers
for their dedication. Not all data listed are considered official.

$$

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Current Radar & Web Cams - Click Thumbnails To Enlarge

Northern Rockies Radar	Riverton Radar

Pocatello	Billings

Salt Lake	Cheyenne

Road Conditions and Web Cameras click the WYDOT Logo for road conditions

Teton Pass - Hwy 22	Alpine Junction - U.S. Hwy 26/89/191	Jackson	Bondurant - U.S. Hwy 189

Togwotee Pass - U.S. Hwy 26	Dubois	Granite Pass - U.S. Hwy 14	Powder River Pass - U.S. Hwy 16

South Pass - Hwy 28	Salt River Pass	Buffalo - I-25/I-90 Interchange	Casper Mountain

I-80 - Little America	Beaver Rim - U.S. Hwy 287	I-80 - Rock Springs	I-80 - Laramie

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If you plan to travel, we recommend checking road conditions along your route and staying on top of road closures here. If you are on Twitter, follow the hashtag: #WyoRoad (or look below) for the latest weather affecting roads and road conditions in and around Wyoming.

Tweets by @NWSRiverton	A Twitter List by NWSRiverton
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