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

NEZ004>010-022>029-035>038-056>059-069>071-094-230100-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
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.

.DAY ONE...TONIGHT.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

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 INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

$$

ET

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

WYZ001>020-022>030-221200-
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
Divide.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rain or snowfall amounts. Thank
you!

$$

Team Riverton

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

WYZ101>119-221615-
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.

.DAY ONE...THIS AFTERNOON AND TONIGHT

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.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

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
National Weather Service Aberdeen SD
517 AM CDT Thu Sep 21 2017

MNZ039-046-SDZ005>008-010-011-017>023-036-037-051-221030-
Traverse-Big Stone-McPherson-Brown-Marshall-Roberts-Edmunds-Day-
Faulk-Spink-Clark-Codington-Grant-Hamlin-Deuel-Hyde-Hand-Buffalo-
517 AM CDT Thu Sep 21 2017

This Hazardous Weather Outlook is for portions of west central
Minnesota, central South Dakota, north central South Dakota, and
northeast South Dakota.

.DAY ONE...Today and Tonight

Showers and thunderstorms will return to far northeastern South
Dakota and west central Minnesota tonight, mainly northeast of a
line from Aberdeen to Watertown. A few of these storms could
become strong to severe, with damaging winds and large hail.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

An elongated area of low pressure will remain nearly steady across
eastern South Dakota and western Minnesota Friday into early
Saturday. Showers and thunderstorms are expected along and ahead
of this boundary late Friday afternoon into Friday night. A few of
these storms could become strong to severe. Heavy rain, damaging
winds, and large hail will be the primary threats.

A extended period of light to, at times, heavy rain will move
across far eastern South Dakota and west central Minnesota. Total
rainfall of 2 to around 4 inches will be possible early Friday
morning into Monday. The highest amounts are expected southeast of
a line from Watertown to Ortonville.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed over far northeastern South
Dakota and west central Minnesota tonight. Wind, hail, and other
reports can be relayed to the Aberdeen National Weather Service by
calling, or through our Facebook and Twitter pages.

$$

KF

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
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