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Flash Flood Warning


Flash Flood Warning
WYC013-272015-
/O.NEW.KRIW.FF.W.0002.180527T1719Z-180527T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Riverton WY
1119 AM MDT SUN MAY 27 2018

The National Weather Service in Riverton has issued a

* Flash Flood Warning for...
  Southern Fremont County in central Wyoming...

* Until 215 PM MDT

* At 1115 AM MDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to one inch of rain has
  already fallen. Flash flooding is expected to begin shortly.

* Flash flooding will remain over mainly rural areas OF southern
  Fremont County.

Additional rainfall amounts of 1 to 2 inchs are possible in the
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 4271 10864 4266 10868 4262 10874 4264 10878
      4269 10874 4272 10870

$$

Hulme


Flood Warning


Flood Warning
National Weather Service Riverton WY
940 AM MDT SUN MAY 27 2018

WYC013-290300-
/O.NEW.KRIW.FA.W.0005.180527T1540Z-180529T0300Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont-
940 AM MDT SUN MAY 27 2018

The National Weather Service in Riverton has issued a

* Flood Warning for...
  Rain and Snowmelt in...
  Central Fremont County in central Wyoming...

* Until 900 PM MDT Monday

* Scattered rain showers are forecasted across the upper Wind River
  Basin Sunday afternoon through Monday morning. One half inch of
  rain with local amounts of up one inch in thunderstorms is
  expected. The combination of snowmelt and rainfall runoff will
  cause significant rises along the Wind River through Monday night.
  Widespread flooding of low lying areas along the Wind River is
  likely through Monday night.

* At 9 am, the Wind River near Dubois crested near 5.1 feet early
  Sunday morning. Minor flood stage is at 5.0 feet. The river is
  expected to rise to 5.4 - 5.5 feet by Monday morning. Low land
  flooding intensifies and becomes more widespread in and around
  Dubois at river levels near 5.5 feet.

* At 9 am, the Wind River at Riverton is receding after cresting
  near 9.3 feet late Saturday night. Minor flood stage is at 9.0
  feet. The river is expected to rise to 9.4 to 9.5 feet late Sunday
  night. The river is then forecasted to rise to 10.3 to 10.5 feet by
  Monday night. At 10.0 feet, there is extensive agricultural
  flooding downstream of Riverton near the Black Bridge and Hidden
  Valley area.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Keep a safe distance from the raging waters of the Wind River.
River banks can suddenly become unstable and quickly wash away.

A Flood Warning means that flooding along the Wind River is imminent
or occurring.

&&

LAT...LON 4330 10912 4329 10909 4325 10903 4324 10899
      4323 10896 4323 10891 4322 10888 4321 10884
      4320 10882 4320 10880 4319 10877 4317 10874
      4314 10872 4312 10870 4310 10867 4308 10861
      4308 10857 4304 10852 4302 10843 4301 10837
      4302 10836 4304 10836 4306 10835 4309 10833
      4312 10829 4313 10825 4313 10823 4311 10826
      4308 10829 4306 10832 4303 10832 4301 10834
      4300 10837 4300 10842 4301 10852 4305 10858
      4306 10861 4308 10868 4311 10873 4313 10873
      4316 10877 4318 10879 4319 10883 4319 10886
      4320 10887 4321 10889 4321 10897 4322 10901
      4323 10902 4324 10906 4325 10907 4327 10911
      4331 10916 4333 10919 4333 10922 4336 10926
      4336 10928 4338 10931 4340 10933 4342 10936
      4342 10938 4341 10941 4340 10943 4343 10946
      4345 10949 4348 10952 4349 10955 4351 10958
      4352 10963 4353 10966 4355 10970 4356 10973
      4356 10974 4357 10975 4359 10978 4359 10975
      4357 10972 4355 10967 4354 10962 4353 10959
      4352 10954 4350 10951 4347 10947 4346 10947
      4345 10945 4343 10942 4344 10935 4340 10929
      4338 10927 4337 10925 4335 10920 4334 10917
      4332 10915

$$

Fahey


Flash Flood Watch


Flood Watch
National Weather Service Riverton WY
1025 AM MDT Sun May 27 2018

...Rapid rises in creeks and rivers Sunday evening through Monday
afternoon...

.Widespread mountain rain showers with locally heavy rain Sunday
afternoon through early Monday morning will cause additional
significant increases in creek and river levels. Many basins will
receive up to one half to one inch of rain this afternoon through
early Monday morning, with local amounts of up to two inches with
thunderstorms.

Several creeks and rivers will reach flows and river levels to
cause minor to moderate flooding. The flooding flows will
continue through Monday afternoon.

Locally heavy rainfall from thunderstorms that develop across
Johnson and Natrona Counties may cause rapid rises in creeks and
streams in these areas this afternoon and evening.

WYZ010-011-020-022-280600-
/O.CON.KRIW.FF.A.0001.180527T1800Z-180528T0600Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northeast Johnson County-Southeast Johnson County-
Natrona County Lower Elevations-Casper Mountain-
Including the cities of Buffalo, Kaycee, and Casper
1025 AM MDT Sun May 27 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING...

The Flash Flood Watch continues for

* Portions of central Wyoming and north central Wyoming,
  including the following areas, in central Wyoming, Casper
  Mountain and Natrona County Lower Elevations. In north central
  Wyoming, Northeast Johnson County and Southeast Johnson
  County.

* Through this evening

* Scattered thunderstorms that develop this afternoon and
  evening may produce local rainfall amounts of 1 to 2 inches of
  rainfall in a short period of time. This may cause area creeks
  and streams to rise rapidly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

Flood Watch
National Weather Service Rapid City SD
918 AM MDT Sun May 27 2018

...STRONG TO SEVERE STORMS EXPECTED THIS EVENING WITH LOCALLY
HEAVY RAINFALL...

.Widespread thunderstorms will track across northeast Wyoming and
far western South Dakota this evening. Some storms may be severe,
and may also produce very heavy rainfall resulting in flash
flooding.

SDZ012-025>027-041-072-074-WYZ054>056-058-071-280000-
/O.CON.KUNR.FF.A.0001.180528T0000Z-180528T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Butte-Northern Foot Hills-Rapid City-Southern Foot Hills-
Fall River-Sturgis/Piedmont Foot Hills-Hermosa Foot Hills-
Northern Campbell-Southern Campbell-Western Crook-Weston-
Northeastern Crook-
Including the cities of Belle Fourche, Spearfish, Rapid City,
Edgemont, Hot Springs, Ardmore, Oelrichs, Sturgis, Hermosa,
Gillette, Wright, Moorcroft, Hulett, Newcastle, Upton, and Colony
918 AM MDT Sun May 27 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 6 PM MDT THIS EVENING
THROUGH THIS EVENING...

The Flash Flood Watch continues for

* Portions of South Dakota and northeast Wyoming, including the
  following areas, in South Dakota, Butte, the Fall River County
  Plains, the Hermosa Foot Hills, the Northern Foot Hills, the
  Rapid City area, the Southern Foot Hills, and the
  Sturgis/Piedmont Foot Hills. In northeast Wyoming,
  Northeastern Crook County, Northern Campbell County, Southern
  Campbell County, Western Crook County, and the Weston County
  Plains.

* From 6 PM MDT this evening through this evening

* Strong to severe thunderstorms are expected to develop this
  evening. Some of these storms will be slow moving and have the
  potential to produce in excess of 2 inches of rainfall in a
  short period of time.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A flash flood watch means that conditions are favorable for heavy
rain over the watch area, which may cause flash flooding along
streams, creeks, canyons, and draws. If you are in the watch
area, monitor noaa weather radio and local media for updated
forecasts. Be ready to quickly move to higher ground, if heavy
rain occurs, rising water levels are observed, or a warning is
issued.

&&

$$

Flood Watch
National Weather Service Rapid City SD
918 AM MDT Sun May 27 2018

...STRONG TO SEVERE STORMS EXPECTED THIS EVENING WITH LOCALLY
HEAVY RAINFALL...

.Widespread thunderstorms will track across northeast Wyoming and
far western South Dakota this evening. Some storms may be severe,
and may also produce very heavy rainfall resulting in flash
flooding.

SDZ024-028-029-WYZ057-280000-
/O.EXT.KUNR.FF.A.0001.180528T0000Z-180528T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Black Hills-Central Black Hills-Southern Black Hills-
Wyoming Black Hills-
Including the cities of Lead, Deadwood, Hill City, Mt Rushmore,
Custer, Four Corners, and Sundance
918 AM MDT Sun May 27 2018

...FLASH FLOOD WATCH NOW IN EFFECT FROM 6 PM MDT THIS EVENING
THROUGH THIS EVENING...

The Flash Flood Watch is now in effect for

* The Black Hills of South Dakota and the Black Hills of Wyoming.

* From 6 PM MDT this evening through this evening

* Strong to severe thunderstorms are expected to develop this
  evening. Some of these storms will be slow moving and have the
  potential to produce in excess of 2 inches of rainfall in a
  short period of time.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A flash flood watch means that conditions are favorable for heavy
rain over the watch area, which may cause flash flooding along
streams, creeks, canyons, and draws. If you are in the watch
area, monitor noaa weather radio and local media for updated
forecasts. Be ready to quickly move to higher ground, if heavy
rain occurs, rising water levels are observed, or a warning is
issued.

&&

$$

Flood Watch
National Weather Service Cheyenne WY
258 AM MDT Sun May 27 2018

...Localized Flash Flooding Possible Over Portions of East Central
Wyoming and the Northern Nebraska Panhandle This Afternoon and
Tonight...

NEZ095-096-WYZ101>103-106>108-280000-
/O.NEW.KCYS.FF.A.0001.180527T1800Z-180528T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
North Sioux-South Sioux-Converse County Lower Elevations-
Niobrara County-North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-
Including the cities of Harrison, Agate, Bill, Douglas,
Deer Creek, Glenrock, Lusk, Redbird, Garrett, Bordeaux,
Wheatland, Guernsey, and Torrington
258 AM MDT Sun May 27 2018

...FLASH FLOOD WATCH IN EFFECT FROM NOON MDT TODAY THROUGH THIS
EVENING...

The National Weather Service in Cheyenne has issued a

* Flash Flood Watch for portions of western Nebraska and
  Wyoming, including the following areas, in western Nebraska,
  North Sioux and South Sioux. In Wyoming, Central Laramie Range
  and Southwest Platte County, Converse County Lower Elevations,
  East Platte County, Goshen County, Niobrara County, and North
  Laramie Range.

* From noon MDT today through midnight MDT tonight.

* Thunderstorms will develop across the area this afternoon, and
  become numerous after 3 PM MDT. These storms may produce locally
  heavy rainfall, which could lead to flash flooding.

* Persons camping or participating in recreational activities for
  the Memorial Day Weekend, particularly near creeks and streams,
  should monitor the weather and be prepared to take action and
  move to higher ground if flash flooding threatens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

Hammer


Flood Watch


Flood Watch
National Weather Service Riverton WY
1025 AM MDT Sun May 27 2018

...Rapid rises in creeks and rivers Sunday evening through Monday
afternoon...

.Widespread mountain rain showers with locally heavy rain Sunday
afternoon through early Monday morning will cause additional
significant increases in creek and river levels. Many basins will
receive up to one half to one inch of rain this afternoon through
early Monday morning, with local amounts of up to two inches with
thunderstorms.

Several creeks and rivers will reach flows and river levels to
cause minor to moderate flooding. The flooding flows will
continue through Monday afternoon.

Locally heavy rainfall from thunderstorms that develop across
Johnson and Natrona Counties may cause rapid rises in creeks and
streams in these areas this afternoon and evening.

WYZ002>004-006-008-009-012-015>017-281630-
/O.CON.KRIW.FA.A.0004.000000T0000Z-180529T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Absaroka Mountains-Cody Foothills-North Big Horn Basin-
Southeast Big Horn Basin-Bighorn Mountains West-
Bighorn Mountains Southeast-Teton and Gros Ventre Mountains-
Wind River Mountains East-Upper Wind River Basin-Wind River Basin-
Including the cities of Cody, Meeteetse, Worland, Dubois,
Riverton, and Shoshoni
1025 AM MDT Sun May 27 2018

...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON...

The Flood Watch continues for

* Portions of central Wyoming, north central Wyoming, and
  northwest Wyoming, including the following areas, in central
  Wyoming, Upper Wind River Basin, Wind River Basin, and Wind
  River Mountains East. In north central Wyoming, Bighorn
  Mountains Southeast, Bighorn Mountains West, and Southeast Big
  Horn Basin. In northwest Wyoming, Absaroka Mountains, Cody
  Foothills, North Big Horn Basin, and Teton and Gros Ventre
  Mountains.

* Through Monday afternoon

* Widespread mountain rain showers with locally heavy rain Sunday
  afternoon through early Monday morning will cause additional
  significant increases in creek and river levels. Many basins
  will receive up to one half to one inch of rain this afternoon
  through early Monday morning, locally up to two inches with
  thunderstorms.

* Several tributary creeks and streams that flow into the Big Horn
  and Powder River have the greatest potential for moderate
  flooding. Medicine Lodge Creek, Ten Sleep Creek, Rock Creek, and
  Clear Creek are expected to flow at very high levels by early
  Monday morning. The Wind River and the North/South Forks of the
  Shoshone River will flow at very high levels for widespread
  flooding of low lying areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

&&

$$


Special Weather Statement


Special Weather Statement
National Weather Service Riverton WY
1103 AM MDT SUN MAY 27 2018

WYZ014-015-018-019-271745-
Wind River Mountains West-Wind River Mountains East-Green Mountains
and Rattlesnake Range-Lander Foothills-
1103 AM MDT SUN MAY 27 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL FREMONT COUNTY
UNTIL 1145 AM MDT...

At 1102 AM MDT, Doppler radar was tracking a strong thunderstorm
near Frye Lake, which is 11 miles southwest of Lander, moving
northwest at 15 mph. Additional thunderstorms were developing over
the southern end of the Wind River Range near Red Canyon and Sinks
Canyon.

Heavy rain, pea-sized hail, wind gusts to 35 mph, and dangerous
lightning are all possible with these storms.

Other impacted locations included Upper Silas Lake, Worthen Meadows
Reservoir, and Louis Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall is also occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4229 10881 4283 10926 4297 10900 4294 10898
      4292 10896 4297 10890 4297 10888 4230 10821
TIME...MOT...LOC 1700Z 123DEG 15KT 4268 10883

$$

CNJ


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1121 AM MDT Sun May 27 2018

COZ030>051-281730-
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-
1121 AM MDT Sun May 27 2018

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

.DAY ONE...Today and Tonight

A couple severe thunderstorms are expected to develop across the
eastern half of the plains of Colorado this afternoon where the
available moisture will be the best. High instability along and
with sufficient wind shear will bring a threat of storms with
very large hail, damaging winds, and a possible tornado. Storms
are first expected to develop after 2 pm, and then move northeast
across the northeast plains of Colorado through 6 PM. After that
time, the threat of any severe weather will decrease.

Dry weather will persist across the Denver area and points
southwest this afternoon. A few showers and storms later this
evening and overnight may develop back along the Front Range, but
mainly north of Denver. Fire danger will reach critical levels in
the Park County area today. Be careful to fully extinguish any
campfires this holiday weekend.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Showers and thunderstorms are expected to develop across much
of the outlook area on Monday and Tuesday. Some late day storms
on Monday could turn severe on the northeast plains and along the
northern Front Range foothills. Large hail and damaging winds will
be the main threats, maybe an isolated tornado or two. The chance
of thunderstorms will continue on Wednesday. Drier and warmer
weather should then return late in the week under a strong ridge
of high pressure.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be required over the northeast
plains of Colorado by 1-2 PM.

$$

Hazardous Weather Outlook
National Weather Service North Platte NE
1049 AM CDT Sun May 27 2018

NEZ004>010-022>029-035>038-056>059-069>071-094-281600-
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-
1049 AM CDT Sun May 27 2018 /949 AM MDT Sun May 27 2018/

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

.DAY ONE...TODAY AND TONIGHT.

Scattered thunderstorms will affect portions of the panhandle,
western Sandhills, and southwest Nebraska from late afternoon
through tonight. Some storms will be strong to severe, primarily
west of Highway 83. Large hail and damaging winds are the main
threats.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

Additional storms are expected to develop during the afternoon
and evening Monday across all of western and north central
Nebraska. Some storms will be strong or severe, capable of
producing large hail and damaging winds. Prolonged periods of
heavy rain may lead to localized flooding Monday night.

Thunderstorms continue into Tuesday with the highest chance
across central Nebraska. A severe storm cannot be ruled out.

After quiet conditions Wednesday and Thursday, the threat for
strong or severe thunderstorms returns late Friday afternoon and
Friday night as a cold front crosses the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible this afternoon and tonight across
the Nebraska Panhandle and far western Nebraska.

&&

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

$$

DS

Hazardous Weather Outlook
National Weather Service Cheyenne WY
637 AM MDT Sun May 27 2018

NEZ002-003-019>021-054-055-095-096-WYZ101>119-281245-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-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-
637 AM MDT Sun May 27 2018

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

.DAY ONE...TODAY AND TONIGHT

Isolated thunderstorms will develop along the Interstate 80
corridor in southeast Wyoming and the southern Nebraska Panhandle
by early afternoon, becoming stronger and more numerous as they
move slowly north and northeast across the region this afternoon
and evening. A few storms could be severe, with large hail and
damaging winds the primary hazards. A brief tornado is also
possible.

In addition, some storms will likely produce heavy rainfall. This
may lead to localized flash flooding. A Flash Flood Watch has been
issued for portions of east central Wyoming and the northern
Nebraska Panhandle.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Scattered to numerous thunderstorms are possible again on Monday
afternoon and evening, especially along and east of the Laramie
Range.

Thunderstorms are possible again on Monday afternoon and evening,
especially along and east of the Laramie Range. A few storms could
be severe, with large hail, damaging winds, and perhaps an
isolated tornado.

.Spotter information statement...

Spotter activation may be necessary this afternoon and evening,
and possibly again on Monday.

$$

Hazardous Weather Outlook
National Weather Service Rapid City SD
449 AM MDT Sun May 27 2018

SDZ001-002-013-014-030>032-042>044-046-047-073-281100-
Harding-Perkins-Northern Meade Co Plains-Ziebach-Custer Co Plains-
Pennington Co Plains-Haakon-Oglala Lakota-Jackson-Bennett-
Mellette-Todd-Southern Meade Co Plains-
449 AM MDT Sun May 27 2018 /549 AM CDT Sun May 27 2018/

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

.DAY ONE...Today and Tonight

Thunderstorms are expected to develop across the area this evening
and overnight, some of which may be strong to severe, with large
hail and damaging winds.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Chances for thunderstorms continue into Monday and Tuesday. There
is a slight risk for severe thunderstorms on Monday, when large
hail and damaging wind will be possible.

.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
449 AM MDT Sun May 27 2018

SDZ012-024>029-041-072-074-WYZ054>058-071-281100-
Butte-Northern Black Hills-Northern Foot Hills-Rapid City-
Southern Foot Hills-Central Black Hills-Southern Black Hills-
Fall River-Sturgis/Piedmont Foot Hills-Hermosa Foot Hills-
Northern Campbell-Southern Campbell-Western Crook-
Wyoming Black Hills-Weston-Northeastern Crook-
449 AM MDT Sun May 27 2018

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

.DAY ONE...Today and Tonight

Thunderstorms will develop over the Black Hills late this
afternoon, with more widespread thunderstorms moving into the area
this evening. Slow-moving storms with the capability of producing
heavy rain, combined with already wet conditions, could result in
flash flooding. Some thunderstorms may be strong to severe, with
large hail and damaging wind.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Chances for thunderstorms continue into Monday and Tuesday. There
is a slight risk for severe thunderstorms on Monday, when large
hail and damaging wind will be possible.

.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 Grand Junction CO
439 AM MDT Sun May 27 2018

COZ001>014-017>023-UTZ022>025-027>029-281045-
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-
439 AM MDT Sun May 27 2018

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

.DAY ONE...Today and Tonight

Isolated thunderstorms are possible across the northern mountains
of eastern Utah and northwest Colorado beginning this afternoon,
continuing overnight. Thunderstorms will generate strong outflow
winds with little to no rain.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

The chance for precipitation will slowly increase early in the
coming week, with showers and isolated thunderstorms favoring
higher terrain, mainly across the northern areas of eastern Utah
and western Colorado. Thunderstorms are likely to generate gusty
outflow winds and lightning with little rain.

Critical fire weather conditions could redevelop by Thursday and
continue on Friday of next week due to the possibility of gusty
southerly winds, low relative humidities, warmer temperatures,
and dry vegetation.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Riverton WY
242 AM MDT Sun May 27 2018

WYZ001>020-022>030-281100-
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-
242 AM MDT Sun May 27 2018

...Flash Flood Watch in effect from noon through this evening for
Natrona and Johnson Counties...

...Flood Watch from this morning through Monday afternoon...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Scattered showers and thunderstorms developing over most
of the area. Locally heavy rainfall is possible and will elevate
the flood threat along rivers and creeks already running high from
snowmelt. Isolated strong to severe thunderstorms are possible.

.DAYS TWO THROUGH SEVEN...Memorial Day through Saturday

Memorial Day...Scattered showers and thunderstorms developing
over most of the area. Locally heavy rain may elevate the flood
threat along rivers and creeks already running high from snowmelt.


Tuesday...Isolated to scattered showers and thunderstorms across
the area.

Thursday and Friday...Isolated to scattered showers and
thunderstorms mainly in the north and west.

.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