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2 products issued by NWS for: Thayne WY
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Hydrologic Outlook

Hydrologic Outlook
WYC003-013-017-019-023-029-035-039-043-281200-

Hydrologic Outlook
National Weather Service Riverton WY
439 AM MDT Wed May 27 2020

...Much higher flows along creeks and small streams will occur
this weekend due to the expected near record high temperatures...

Snowpack at the 8,000 to 10,000 foot elevation is ripe (water
laden) and will be melting by this weekend.

Afternoon temperatures at the 9,000 foot elevation are forecasted
to warm into the lower to mid 60s from Saturday through Monday.
Overnight low temperatures are expected to range from the upper
30s to the mid 40s through the same time period. Only isolated
showers and a few thunderstorms area forecast from Saturday
through Monday.

The combination of melting snowpack and isolated rain will result
in higher flows along creeks and small streams this weekend into
next week.

Remember, during active snowmelt runoff, mountain creeks flow the
highest during evening and overnight hours, through the early
morning. Do not attempt to cross a fast moving creek or stream at
these times as the power of water will easily carry you downstream.

$$

Team Riverton/21




Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Riverton WY
217 AM MDT Wed May 27 2020

WYZ001>020-022>030-281300-
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-
217 AM MDT Wed May 27 2020

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Very isolated thunderstorms in the afternoon and early evening
hours.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Friday through Sunday...Very warm to hot temperatures are
expected. This will increase snowmelt in the mountains leading to
rising water levels in creeks, streams, and rivers over the
weekend. Also, isolated thunderstorms could occur especially on
Saturday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions, according to standard operating procedures.

$$



U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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