Hazardous Weather Outlook
Issued by NWS Riverton, WY

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FLUS45 KRIW 182101
HWORIW

Hazardous Weather Outlook
National Weather Service Riverton WY
301 PM MDT Mon Sep 18 2017

WYZ001>020-022>030-192115-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
301 PM MDT Mon Sep 18 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO
9 PM MDT TUESDAY FOR THE NORTHERN AND WESTERN MOUNTAINS...

This Hazardous Weather Outlook is for Western and Central
Wyoming.

.DAY ONE...This Afternoon and Tonight

A cold wet pacific low pressure trough will bring snowfall
to the western and northern mountains of wyoming this evening
through tonight.

Very gusty southwest winds across most of the forecast area.
Tonight, rain and mountain snow are expected to increase over
western Wyoming.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

The heavier snowfall is expected above 8500 feet where 5 to
10 inches of snow can be expected through 9 pm mdt Tuesday
evening. Strong gusty west winds are also expected on the
passes and higher ridges.  Snowfall from 8500 to 7500 feet
is expected to be from 3 to 5 inches.

West to southwest winds of 30 mph with gusts to 45 mph will be
possible Tuesday in the foothills of the Absaroka and Wind River
mountains and across Sweetwater, southern Fremont and Natrona
counties in the afternoon.

Wednesday...Unsettled with a good chance of some mountain
snowfall at times with possible snow down to the valley and basin
floor out west. Very windy in the wind corridor between Rock
Springs and Casper, as well as in the mountains.

Thursday...Significant mountain snowfall possible over the
northwestern mountains.

Friday night through Saturday night...Widespread mountain
snowfall and valley rain possible mainly along and east of the
Divide. Rain could lower to valley floors in some locations east
of the Divide.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report snowfall and significant rainfall
amounts tonight. Thank you!

$$



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