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Hydrologic Outlook

Hydrologic Outlook
WYC003-013-019-029-039-043-252201-
Hydrologic Outlook
National Weather Service Riverton WY
1001 AM MDT Thu May 24 2018

...Increased snowmelt at the 9,000 to 10,000 foot elevation
through Saturday followed by widespread rain showers on Sunday...

...Highest flows of the runoff season expected Monday and
Tuesday of next week...

Afternoon mountain temperatures at the 9,000 foot elevation are
expected to warm to into the lower to middle 60s Friday and Saturday.
Morning low temperatures near 9,000 feet are forecasted to be at
or above the frost temperature of 37 degrees Friday through Sunday.

Increased snowmelt at the 9,000 to 10,000 foot elevation through
Saturday will be followed by widespread mountain rain showers on Sunday.
At this time, precipitation totals look to the highest across the Big
Horn Mountains.

The combination of rain and snowmelt runoff will further
increase already high creek and river levels. The Wind River and the
North/South Forks of the Shoshone River should see the highest flows of the
runoff season by Monday and Tuesday of next week. Tributary streams that
feed into the Big Horn and Snake Rivers may also see the highest flows
of the season by early next week.

During active snowmelt runoff, mountain creeks and streams are
at their highest levels during the late afternoon/early evening
hours.  Crossing creeks and streams during that time is highly
hazardous.

Graphical forecasts are available at:
http://water.weather.gov/ahps2/index.php?wfo=riw
Visit weather.gov/riverton and select the rivers & lakes tab for
graphical forecasts and additional information.

$$
jtfahey




Flood Advisory

Flood Advisory
National Weather Service Riverton WY
920 AM MDT THU MAY 24 2018

WYC013-261500-
/O.NEW.KRIW.FA.Y.0005.180524T1520Z-180526T1500Z/
/00000.N.SM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont-
920 AM MDT THU MAY 24 2018

The National Weather Service in Riverton has issued a

* Flood Advisory for...
  Snowmelt in...
  Central Fremont County in central Wyoming...

* Until 900 AM MDT Saturday

* Minor flooding of low lying areas along the Wind River from Dunoir
  Valley downstream to the Black Bridge area near Riverton through
  Saturday morning.

* At 830 am, the Wind River near Dubois was around 4.8 feet. the
  river is expected rise and fluctuate near the minor flood stage of
  5.0 feet for the next two days. Minor flooding of low lying areas
  at and around Dubois usually occurs at the 5.0 foot level.

* At 830 am, the Wind River at Riverton crested at around 8.5 feet.
  The river is expected to steadily rise to near minor flood stage
  of 9.0 feet by early Friday morning--then fluctuate around 9.0 to
  9.2 feet through early Saturday morning.  Minor flooding of low
  lying areas near the Black Bridge area usually occurs at river
  stages of 9.0 to 9.5 feet.

* Much warmer mountain temperatures Friday and Saturday and rain
  showers on Sunday should cause even sharper rises along the Wind
  River for the Memorial Day weekend. This advisory will most likely
  be upgraded to a Flood Warning with the expected much higher river
  flows.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Advisory means river or stream flows are elevated, minor
flooding of low lying areas is occurring or is imminent.

&&

LAT...LON 4346 10946 4343 10943 4343 10939 4344 10934
      4341 10930 4336 10924 4334 10921 4334 10917
      4328 10909 4326 10904 4323 10895 4323 10891
      4322 10888 4321 10884 4318 10875 4311 10868
      4309 10863 4309 10861 4307 10857 4303 10851
      4303 10847 4302 10841 4302 10837 4306 10834
      4304 10833 4303 10833 4300 10836 4300 10843
      4301 10848 4301 10852 4304 10857 4306 10859
      4306 10862 4307 10863 4308 10866 4308 10869
      4310 10872 4317 10879 4321 10891 4321 10897
      4325 10907 4332 10919 4333 10923 4336 10927
      4338 10931 4341 10935 4342 10936 4341 10938
      4341 10945 4343 10946 4345 10950 4347 10952
      4349 10953 4350 10957 4353 10967 4355 10972
      4356 10976 4359 10975 4358 10974 4357 10969
      4353 10963 4352 10956 4351 10952

$$

Fahey



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Riverton WY
320 AM MDT Thu May 24 2018

WYZ001>020-022>030-251100-
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-
320 AM MDT Thu May 24 2018

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Isolated to widely scattered afternoon and evening thunderstorm in
northern and western Wyoming.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

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

Sunday and Memorial Day...Scattered mainly afternoon and evening
thunderstorms most areas. Locally heavy rain may elevate the flood
threat along rivers and creeks already running high from
snowmelt. Isolated strong to severe thunderstorms possible on
Sunday across central Wyoming.

.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: May 16, 2007
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