weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Rapid City SD
330 PM MDT Mon May 21 2018

SDZ001-002-012>014-025-026-031-032-046-047-049-072-073-WYZ071-
221300-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Foot Hills-Rapid City-Pennington Co Plains-Haakon-
Mellette-Todd-Tripp-Sturgis/Piedmont Foot Hills-
Southern Meade Co Plains-Northeastern Crook-
330 PM MDT Mon May 21 2018 /430 PM CDT Mon May 21 2018/

This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.

.DAY ONE...This Afternoon and Tonight

No hazardous weather expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Daily chances for thunderstorms can be expected for the remainder
of the week as warmer air returns to the region. The best chances
for storms will be on Tuesday and Wednesday, when there is a
marginal risk of strong to severe storms across much of the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

$$

Hazardous Weather Outlook
National Weather Service Rapid City SD
330 PM MDT Mon May 21 2018

SDZ024-027>030-041>044-074-WYZ054>058-221300-
Northern Black Hills-Southern Foot Hills-Central Black Hills-
Southern Black Hills-Custer Co Plains-Fall River-Oglala Lakota-
Jackson-Bennett-Hermosa Foot Hills-Northern Campbell-
Southern Campbell-Western Crook-Wyoming Black Hills-Weston-
330 PM MDT Mon May 21 2018

This Hazardous Weather Outlook is for portions of southwestern
South Dakota...the Black Hills of South Dakota...northeast
Wyoming...and the Black Hills of Wyoming.

.DAY ONE...This Afternoon and Tonight

Isolated thunderstorms will be possible late this afternoon and
evening. Severe storms are not anticipated at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Daily chances for thunderstorms can be expected for the remainder
of the week as warmer air returns to the region. The best chances
for storms will be on Tuesday and Wednesday, when there is a
marginal risk of strong to severe storms across much of the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

$$

Hazardous Weather Outlook
National Weather Service Bismarck ND
616 AM CDT Tue May 22 2018

NDZ031>033-040-041-043-044-231130-
Golden Valley-Billings-Stark-Slope-Hettinger-Bowman-Adams-
516 AM MDT Tue May 22 2018

This Hazardous Weather Outlook is for portions of southwest North
Dakota.

.DAY ONE...Today and Tonight

There is a chance for thunderstorms today through tonight.

One or two storms may become strong to severe with locally heavy
rainfall, large hail up to 1 inch, and gusty winds up to 60 mph
across southwest North Dakota this afternoon and evening.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is a chance for thunderstorms each day Wednesday through
Friday.

A few stronger storms may be possible on Wednesday across western
and central North Dakota.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

$$

Hazardous Weather Outlook
National Weather Service Bismarck ND
616 AM CDT Tue May 22 2018

NDZ001>005-009>013-017>023-025-034>037-042-045>048-050-051-231130-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-Ward-
McHenry-Pierce-McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Wells-
Foster-Morton-Burleigh-Kidder-Stutsman-Grant-Sioux-Emmons-Logan-
La Moure-McIntosh-Dickey-
616 AM CDT Tue May 22 2018 /516 AM MDT Tue May 22 2018/

This Hazardous Weather Outlook is for portions of north central
North Dakota, northwest North Dakota, south central North Dakota,
southeast North Dakota, and southwest North Dakota.

.DAY ONE...Today and Tonight

There is a chance for thunderstorms today through tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is a chance for thunderstorms each day Wednesday through
Friday.

A few stronger storms may be possible on Wednesday across western
and central North Dakota.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

TJK/WA

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
534 AM CDT Tue May 22 2018

IAZ020-031-032-NEZ013-014-SDZ038-050-052>054-057>061-063>071-
231045-
Plymouth-Woodbury-Ida-Dixon-Dakota-Beadle-Gregory-Jerauld-Sanborn-
Miner-Brule-Aurora-Davison-Hanson-McCook-Charles Mix-Douglas-
Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton-Clay SD-Union-
534 AM CDT Tue May 22 2018

This Hazardous Weather Outlook is for portions of northwest Iowa,
west central Iowa, northeast Nebraska, central South Dakota, east
central South Dakota, south central South Dakota, and southeast
South Dakota.

.DAY ONE...Today and Tonight

Isolated non-severe thunderstorms are expected near the Missouri
River through midday.  Additional storms will begin to redevelop
later in the afternoon and evening, spreading north of Interstate
90 overnight. A few storms tonight may produce hail up to quarter
size and locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Thunderstorms will continue at times through Thursday night.
A few storms may be severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is unlikely tonight.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
357 AM MDT Tue May 22 2018

NEZ002-003-019>021-054-055-095-096-231030-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-
357 AM MDT Tue May 22 2018

This hazardous weather outlook is for portions of western
Nebraska.

.DAY ONE...TODAY AND TONIGHT

Scattered showers and thunderstorms are expected this afternoon
and evening. A few storms could become strong with gusty winds and
small hail.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Scattered showers and thunderstorms are expected Wednesday, and
again Sunday and Monday. A few strong to severe storms are
possible Wednesday afternoon with hail the main threat.

.Spotter information statement...

Spotter activation is not expected.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
357 AM MDT Tue May 22 2018

WYZ101>119-231030-
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-
357 AM MDT Tue May 22 2018

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

.DAY ONE...TODAY AND TONIGHT

Scattered to numerous showers and thunderstorms are expected this
afternoon and evening. A few storms could become strong to severe
with hail the main threat.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Scattered showers and thunderstorms are expected Wednesday, and
again Sunday and Monday. The threat for severe storms appears to
be low.

.Spotter information statement...

Spotter activation is not anticipated.

$$

Hazardous Weather Outlook
National Weather Service Aberdeen SD
422 AM CDT Tue May 22 2018

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-230930-
Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-
Roberts-Walworth-Edmunds-Day-Dewey-Potter-Faulk-Spink-Clark-
Codington-Grant-Hamlin-Deuel-Stanley-Sully-Hughes-Hyde-Hand-Jones-
Lyman-Buffalo-
422 AM CDT Tue May 22 2018 /322 AM MDT Tue May 22 2018/

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

Dense fog will affect northeast South Dakota and west central
Minnesota through the morning hours. Visibility will be reduced to
one-quarter mile or less at times.

Scattered showers and thunderstorms are expected across the area
tonight. Some storms could produce hail and heavy rain, mainly
from central South Dakota eastward to southeast and east-central
South Dakota.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

On and off chances for showers and thunderstorms are in the
forecast through the period. Some storms could be strong to severe
Wednesday and Thursday, with hail and gusty winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$
TMT

Hazardous Weather Outlook
National Weather Service North Platte NE
347 AM CDT Tue May 22 2018

NEZ004>010-022>029-035>038-056>059-069>071-094-230900-
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-
347 AM CDT Tue May 22 2018 /247 AM MDT Tue May 22 2018/

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

.DAY ONE...TODAY AND TONIGHT.

There is a chance for thunderstorms late this afternoon across
southwest Nebraska. These storms will expand north into portions
of the Sandhills this evening. Storms are expected to remain
scattered, with the severe threat low.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

Additional chances for thunderstorms exist each afternoon and
evening Wednesday through Thursday. A few storms may approach
severe limits with hail and wind the primary threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

&&

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

$$

Taylor

Hazardous Weather Outlook
National Weather Service Billings MT
238 AM MDT Tue May 22 2018

MTZ030>033-036-037-058-230845-
Treasure-Northern Rosebud-Custer-Fallon-Powder River-Carter-
Southern Rosebud-
238 AM MDT Tue May 22 2018

This Hazardous Weather Outlook is for portions of southeast
Montana.

* WHAT...Showers and thunderstorms, with potential for heavy
  rainfall and a few severe storms.

* WHERE...Across southeast Montana.

* WHEN...Late this afternoon through Wednesday.

* ADDITIONAL DETAILS...A few severe thunderstorms capable of
  producing large hail and strong winds are possible late this
  afternoon and evening. Greatest potential for severe storms is in
  far southeast Montana.

* ADDITIONAL HAZARD CONCERNS...Showers and thunderstorms will
  likely produce areas of heavy rainfall tonight and Wednesday.
  Some rivers and streams could see rises from this rainfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Weather Outlook is issued when hazardous weather could
impact the region within the next week. Be sure to stay tuned for
future updates as locations, timing, and impacts could change.
Begin preparations to mitigate any impacts that could result from
the hazardous weather.

$$

Hazardous Weather Outlook
National Weather Service Riverton WY
215 AM MDT Tue May 22 2018

WYZ001>020-022>030-231100-
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-
215 AM MDT Tue May 22 2018

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Widespread showers and thunderstorms by late afternoon,
continuing overnight. Heavy rain, with localized flooding, with
the stronger storms, especially east of the Divide. Some stronger
storms will have hail and strong wind gusts.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Wednesday...A chance of afternoon and evening thunderstorms,
especially over western and northern portions.

Thursday...A chance of afternoon and evening thunderstorms over
and near the mountains.

Saturday...Isolated afternoon and evening thunderstorms in the
west.

Sunday and Monday...A chance of thunderstorms.

.SPOTTER INFORMATION STATEMENT...

Spotters are urged to report hail, wind gusts past 45 mph and any
flooding. Thank you.

$$

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