weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Riverton WY
151 AM MDT Wed Sep 20 2017

WYZ001>020-022>030-211200-
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-
151 AM MDT Wed Sep 20 2017

...WINTER STORM WARNING FOR THE WIND RIVER, TETON AND GROS VENTRE
MOUNTAINS TONIGHT THROUGH FRIDAY MORNING...

...WINTER WEATHER ADVISORY TONIGHT THROUGH FRIDAY MORNING FOR THE
NORTHERN AND WESTERN MOUNTAINS...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Unsettled with a good chance of increasing mountain snowfall
tonight down to 6500 feet. Significant mountain snowfall expected
across the western, northwestern mountains. Please see the winter
weather statement for more details.

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.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thursday through Friday...Significant mountain snowfall continues
over the western central and northern mountains. Rain may change
to snow in the Cody Foothills early Friday.

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!

$$

Hazardous Weather Outlook
National Weather Service GRAND JUNCTION CO
237 AM MDT Wed Sep 20 2017

COZ001>014-017>023-UTZ022>025-027>029-210845-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-
Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide-
Northwest San Juan Mountains-Southwest San Juan Mountains-
Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
237 AM MDT Wed Sep 20 2017

This hazardous weather outlook is for eastern Utah and western
Colorado.

.DAY ONE...Today and Tonight

Breezy to windy conditions will persist today as a strong upper
level disturbance begins to impact the region. The strongest winds
are expected across areas north of I-70 with the peak gusts
up to 40 mph at lower elevations. Travel may be difficult,
especially for high profile vehicles.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Breezy to windy conditions will persist into the late week period
under the continued influence of the strong upper level
disturbance. A return to more unsettled weather as well as a
significant cool down is looking probable by late this week as a
cold front treks through the region which should lead to snow
levels lowering in the mountains going into the weekend,
especially further north.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
954 PM MDT Tue Sep 19 2017

UTZ001>016-019>021-517-518-WYZ021-201300-
Cache Valley/Utah Portion-Northern Wasatch Front-
Salt Lake and Tooele Valleys-Southern Wasatch Front-
Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys-
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Western Uinta Basin-Castle Country-San Rafael Swell-
Sanpete/Sevier Valleys-West Central Utah-Southwest Utah-
Utahs Dixie and Zion National Park-South Central Utah-
Glen Canyon Recreation Area/Lake Powell-Central Mountains-
Southern Mountains-Southwest Wyoming-
954 PM MDT Tue Sep 19 2017

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Tonight

No hazardous weather is expected tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Gusty southwest winds will pick up again on Wednesday and spread
across much of the outlook area.

A strong cold front will move slowly across the outlook area
Wednesday night through Friday morning. This system will bring
widespread valley rain and mountain snow to the northern and
western outlook area with significant new snowfall in the
northern and central mountains.

Locally strong southwest winds will develop ahead of the front on
Thursday across the south and east.

Cool unsettled weather is expected Friday through the weekend.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

$$

For more information from NOAA/s National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx

Hazardous Weather Outlook
National Weather Service Cheyenne WY
832 PM MDT Tue Sep 19 2017

WYZ101>119-201200-
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-
832 PM MDT Tue Sep 19 2017

This hazardous weather outlook is for portions of east central
Wyoming...south central Wyoming and southeast Wyoming.

.DAY ONE...TONIGHT

High winds will continue across parts of southeast Wyoming,
particularly for the I-25 corridor from the Colorado border north
to just south of Wheatland through Midnight. Winds gusts to around
60 mph will pose a significant risk for blowovers of high profile
vehicles and trucks pulling lighter weight trailers. The winds are
expected to diminish somewhat after midnight tonight.

Periods of light mountain snows will gradually taper off late
tonight with generally light accumulations of a few inches
possible. Roads in the high country are expected to remain
passable tonight.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A weather disturbance is expected to impact the region from
Friday through at least Sunday. Much colder temperatures will
accompany this system, along with good chances for precipitation.
Rain could mix with, or change entirely to snow at elevations as
low as 6000 feet.

.Spotter information statement...

Activation of storm spotters is not expected at this time.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
832 PM MDT Tue Sep 19 2017

NEZ002-003-019>021-054-055-095-096-201200-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-
832 PM MDT Tue Sep 19 2017

This hazardous weather outlook is for portions of western
Nebraska.

.DAY ONE...TONIGHT

Northwest winds at 35 to 45 mph will continue across the southern
Nebraska Panhandle through late tonight. Those driving west along
Interstate 80 driving high profile or pulling lighter weight
trailers should be on the lookout for sudden wind gusts from the
northwest that could result in the loss of control of the vehicle.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

No hazardous weather is expected at this time.

.Spotter information statement...

Activation of storm spotters is not expected at this time.

$$

Hazardous Weather Outlook
National Weather Service Billings MT
322 PM MDT Tue Sep 19 2017

MTZ040-041-064>066-202130-
Northern Park-Northern Sweet Grass-Paradise Valley-Livingston Area-
Beartooth Foothills-
322 PM MDT Tue Sep 19 2017

This Hazardous Weather Outlook is for portions of south central
Montana.

* Weather Hazard: Strong cross winds on Interstate 90, making
  driving difficult from Reedpoint through Livingston. Gusts in
  excess of 50 mph possible.

* Timing: Wednesday, from early morning through the evening.

$$

Hazardous Weather Outlook
National Weather Service Billings MT
322 PM MDT Tue Sep 19 2017

MTZ067-202130-
Absaroka/Beartooth Mountains-
322 PM MDT Tue Sep 19 2017

This Hazardous Weather Outlook is for portions of south central
Montana.

* Weather Hazard: Periods of accumulating snow above 7000 feet
  will make outdoor recreation difficult at times. Travel over
  Beartooth Pass will be affected.

* Timing: Wednesday night through Friday.



$$

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1029 AM MDT Tue Sep 19 2017

COZ030>051-201630-
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
County-
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
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1029 AM MDT Tue Sep 19 2017

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

Very dry and windy conditions will prevail this afternoon ahead
of a cold front. Wind gusts up to 50 mph will occur over the
higher terrain with gusts to 30 mph over northeast Colorado.
Critical to extreme fire weather conditions will be in place over
most of north central and northeast Colorado this afternoon into
the early evening hours. There will be a chance of showers in the
mountains late this afternoon and evening mainly near the Wyoming
border.

A strong southwesterly flow aloft will be over the region this
afternoon as a trough passes across the Northern Rockies. Its
associated cool front will push into northeast Colorado this
evening.


.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Warm temperatures, dry conditions, and breezy conditions will
elevated the fire danger at times through Friday. Moisture will
increase behind a cold front that is expected to push through the
area Friday. Temperatures will fall below seasonal normals
Saturday through Monday with a chance of rain and high mountain
snow.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE