Hazardous Weather Outlook
Issued by NWS Riverton, WY

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FLUS45 KRIW 190838
HWORIW

Hazardous Weather Outlook
National Weather Service Riverton WY
238 AM MDT Tue Sep 19 2017

WYZ001>020-022>030-201200-
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-
238 AM MDT Tue Sep 19 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...Today and Tonight

A cold wet pacific low pressure trough will bring snowfall
to the western and northern mountains of wyoming through this
evening. An isolated afternoon thunderstorm is not out of the
question.

The heavier snowfall is expected above 8500 feet where 4 to 10
inches of snow can be expected through 9 pm mdt this evening.
Snowfall from 7500 to 8500 feet is expected to be from 2 to 5
inches. Additionally, west to southwest winds of 20 to 30 mph
with gusts to 45 mph will be possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Wednesday...Unsettled with a good chance of some mountain
snowfall at times with possible snow down to the valley and basin
floor out west. Windy to very windy across most of the forecast
area with gusts as high as 45 mph over the lower elevations...55
or more mph across the higher ridges and passes in the central and
northern mountains.

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

Friday night through Sunday night...Widespread mountain snowfall
and valley rain at times especially along and east of the Divide.
Snow could lower to valley floors at a few locations east of the
Divide.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report snowfall amounts. Thank you!

$$


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