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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Cheyenne WY
352 AM MST Mon Dec 18 2017

Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
352 AM MST Mon Dec 18 2017

This hazardous weather outlook is for southeast Wyoming.


Periods of strong gusty winds are expected across the wind prone
areas along Interstate 80 and Interstate 25 today. A High Wind
Warning is in effect for portions of Interstate 80 between Laramie
and Rawlins, Cheyenne and Laramie, and Interstate 25 between
Chugwater and Wheatland for strong winds up to 65 MPH.


A strong cold front will sweep across the region Wednesday night
and Thursday. This front will be accompanied by widespread
accumulating snowfall, some drifting snow, and much colder
temperatures. Morning lows in the single digits below zero are
possible Friday.

An arctic cold front is forecast to move into the region during
the weekend bringing more snowfall and the potential for bitter
cold temperatures. Those with early holiday travel plans late
this week and into the weekend should continue to monitor the
latest weather forecasts.

.Spotter information statement...

Spotter activation will not be needed.


Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
603 AM MST Mon Dec 18 2017

Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
603 AM MST Mon Dec 18 2017


This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Warmer weather can be expected today. It will be breezy in the
foothills and along the northern Colorado border where peak gusts
will reach 25 to 35 mph.

A flat ridge of high pressure building into the area will bring
the warmer and dry weather.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Dry and warm weather will continue Tuesday and Wednesday. A cold
airmass will move in Thursday morning associated with a cold front
and passing upper level storm system. There will be a good chance
of snow over the mountains and northeast Colorado plains. The
mountains should receive a few inches of snow while the plains see
up to a couple inches. Cold temperatures will continue on Friday.
Another cold front is expected to arrive on Saturday with even
colder temperatures and another chance of snow. High temperatures
through the weekend may only be in the teens on the plains and
even colder in the mountains. Low temperatures Sunday morning may
fall below zero.


Spotter activation will not be needed today or tonight.


Hazardous Weather Outlook
National Weather Service Riverton WY
303 AM MST Mon Dec 18 2017

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-
303 AM MST Mon Dec 18 2017


This Hazardous Weather Outlook is for Western and Central

.DAY ONE...Today and Tonight.

West winds of 35 to 50 mph with gusts of 60 to 70 mph are
expected along the Cody Foothills through 11 am this morning,
especially in the vicinity of Clark. Please see the High Wind
Warning for more information.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday Night into Wednesday morning...Strong wind possible
across the Cody Foothills and southern wind corridor from Jeffrey
City to Casper.

Wednesday through Thursday morning...Another storm system will
spread snow and much colder air southeast across the area.

Friday and Saturday...An arctic cold front and storm system will
spread snow, strong wind and bitter cold air across the area.

Sunday...Bitter cold temperatures will continue.


Spotters in the Cody Foothills, please report any wind damage or
wind gusts of 60 mph or higher. Thank you.



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Silver Spring, MD 20910
Page last modified: June 2, 2009
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