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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Cheyenne WY
1008 AM MDT Thu Sep 21 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-
1008 AM MDT Thu Sep 21 2017

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


Gusty south to southwest winds will combine with very low humidity
values to produce elevated to critical fire weather conditions
over much of southeast Wyoming. A Red Flag Warning is in effect
for most lower elevations along and west of the Laramie Range.


Isolated afternoon and early evening thunderstorms will be
possible Friday.

A strong Pacific storm system will move onshore and slowly meander
eastward across the north-central Rockies and high plains this
weekend and early next week. Much colder temperatures and widespread
precipitation will accompany this system. Rain may mix with and
eventually change to snow at elevations as low as 6500 feet Saturday
night and Sunday night. Light to moderate snow accumulations will
be possible over the higher mountain peaks.

.Spotter information statement...

Spotter activation will not be required.


Hazardous Weather Outlook...UPDATED
National Weather Service North Platte NE
800 PM CDT Thu Sep 21 2017

Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Western Cherry-
800 PM CDT Thu Sep 21 2017 /700 PM MDT Thu Sep 21 2017/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.


Hazardous weather is not expected at this time.


Fire weather concerns are elevated Friday across portions of
southwest Nebraska as warm and breezy conditions continue.

A strong cold front will begin to cross the Sandhills on Friday,
setting the stage for thunderstorms. Some storms may be strong or
severe during the late afternoon and evening hour. Damaging wind
is the primary threat, although large hail, very heavy rain, and
frequent lightning are also possible.

The cold front will become stationary over the weekend, allowing
several rounds of precipitation to overspread the region. The
rain will be heavy at times. The potential exists for rainfall
totals exceeding three inches for areas east of Highway 83 by
Monday morning.


Spotter activation will not be needed through tonight.


Get your weather, hydrological, and climate information at



Hazardous Weather Outlook
National Weather Service Riverton WY
212 PM MDT Thu Sep 21 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-
212 PM MDT Thu Sep 21 2017

...Winter Weather Advisory in effect for the northwestern
mountains through Friday...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Tonight and Friday

Significant mountain snowfall and valley rainfall across
northwestern Wyoming through Friday Please see the winter weather
statement for more details.

Rain may mix with or change to snow briefly in the Cody Foothills
early Friday.

.DAYS TWO THROUGH SEVEN...Friday Night through Wednesday

Friday night through Monday...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


Spotters are encouraged to report rain or snowfall amounts. Thank


Team Riverton

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1051 AM MDT Thu Sep 21 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-
1051 AM MDT Thu Sep 21 2017

This hazardous weather outlook is for northeast and north central

.DAY ONE...Today and Tonight

Temperatures will be near record highs today. The heat will
combine with very low humidities and south winds gusting to near
40 mph to create very high fire danger this afternoon on the
plains south of Interstate 76 and along the Palmer Divide.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There will be a chance of showers and thunderstorms mainly over
the mountains Friday afternoon and night, then showers and a few
thunderstorms will be likely Saturday and Saturday night over the
mountains and plains. For Sunday through Wednesday, the cool and
showery weather pattern will continue. Temperatures will be
below seasonal normals from Saturday through at least the middle
of next week.


Spotter activation will not be needed today or tonight.


Hazardous Weather Outlook
National Weather Service GRAND JUNCTION CO
1031 AM MDT Thu Sep 21 2017

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-
1031 AM MDT Thu Sep 21 2017

This hazardous weather outlook is for eastern Utah and western

.DAY ONE...Today and Tonight

A wind advisory is in effect this afternoon and evening for
northwest and west-central Colorado, and southeast and east-
central Utah. The strongest winds are expected across areas north
of I-70 with the peak gusts up to 50 mph at lower elevations and
65 mph at higher elevations. Travel may be difficult, especially
for high profile vehicles.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

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 activation will not be needed.


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NOAA National Weather Service
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Silver Spring, MD 20910
Page last modified: June 2, 2009
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