962
WWUS45 KRIW 182349
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
549 PM MDT Mon May 18 2026

WYZ015-018>020-022-030-190100-
/O.EXP.KRIW.WS.W.0005.000000T0000Z-260519T0000Z/
Wind River Mountains East-Lander Foothills-Green Mountains and
Rattlesnake Range-Natrona County Lower Elevations-Casper Mountain-
East Sweetwater County-
Including the cities of Lander, Wamsutter, Jeffrey City, and
Casper
549 PM MDT Mon May 18 2026

...WINTER STORM WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING...

Accumulating snow has ended and gusty northeast wind has
substantially decreased. Therefore, the winter storm warning will be
allowed to expire at 6 PM Monday.

$$

WYZ014-026>029-190100-
/O.EXP.KRIW.WW.Y.0019.000000T0000Z-260519T0000Z/
Wind River Mountains West-Upper Green River Basin-South Lincoln
County-Rock Springs and Green River-Flaming Gorge-
Including the cities of Farson, Cokeville, Big Piney, La Barge,
Green River, Kemmerer, and Rock Springs
549 PM MDT Mon May 18 2026

...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING...

Light snow may continue through 9 or 10 PM Monday across the lower
elevations of mainly Sublette County. However, with temperatures
hovering between 29 and 34 degrees accumulations would be light.
Therefore, the winter weather advisory will be allowed to expire at
6 PM Monday.

$$

For more information from the National Weather Service, visit
https://weather.gov/riw/ .

CNJ