Western and Central Wyoming

Weather Forecast Office

Winter Storm Will Impact the Area Today with Snow and High WInd

SYNOPSIS:

A strong cold front will move across the area today. Snow, blowing and drifting snow will cause hazardous travel conditions across the west through the afternoon. Winter Storm Warnings and Winter Weather Advisories are in effect for far western portions until 5 pm. Snowfall amounts of 6 to 10 inches for the mountains, with local amounts of 9 to 15 inches in the Tetons. Lower elevations in the far west will see 4 to 5 inches. Other areas of the state south may see a dusting of snow up to a couple of inches.

Strong winds will also accompany the system in the western mountains, , I-80 and the southern wind corridor and northern I-25 corridor. High Wind Warnings are in effect for portions of Fremont, Natrona and Johnson Counties today where wind gusts over 60 mph are expected. Strong northwest wind will continue across the Wind River Basin and northeast Johnson County through this evening.

IMPACTS:

Western mountain and valley roads will be slick and hazardous due to falling snow and windy conditions.
Strong to High Winds will create hazardous driving conditions and areas of blowing snow.
- Southeast Fremont and Natrona counties will see High Wind gusts to 60 mph into this afternoon.
- Interstate 80 could see strong winds up to 50 mph today.
- The Wind River Basin and northeast Johnson County could see northwest winds gusting near 60 mph this afternoon and evening.

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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 6 AM 12/12)
Click Images To Enlarge

Winter Storm Warnings and Winter Weather Advisories are in effect until 5 pm Wednesday

High Wind Warnings are in effect for southeast Fremont and Natrona Counties until 2 PM Wednesday

High Wind Warnings are in effect for the Wind River Basin and Northeast Johnson County from noon today until midnight Wednesday night.

Current Radar Loop
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Radar simulation of timing of snow beginning
at 5 AM Wednesday until 8 PM Wednesday night. The
darker blue shades represent heavier snow.

Snow and Wind Forecasts for Wednesday
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Forecast Snowfall on Wednesday	Wednesday'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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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.

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