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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Riverton WY
200 AM MDT Fri May 29 2020

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-
200 AM MDT Fri May 29 2020

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Isolated strong thunderstorms possible, mainly in northern

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...Widely scattered afternoon and evening thunderstorms.
Strong to possibly severe thunderstorms are possible generally
across the Bighorn Basin, Johnson and Natrona counties.

Sunday...Elevated fire behavior possible in portions of the area
in the afternoon.

Monday...Showers and thunderstorms possible over far southern
portions late in the afternoon into the evening.

Tuesday...Showers and thunderstorms possible over eastern portions
late in the afternoon into the evening.

Wednesday...Scattered afternoon showers and thunderstorms west of
the Divide. Showers east of the Divide through the overnight

This weekend into next week...Unseasonably warm temperatures will
result in rapid mountain snowmelt. Significant rises are expected
on area creeks and rivers where ample snow remains in the


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


Hydrologic Outlook

Hydrologic Outlook

Hydrologic Outlook
National Weather Service Riverton WY
1228 PM MDT Thu May 28 2020

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

Snowpack at the 8,000 to 10,000 foot elevation is ripe (water
laden), and will be melting quickly this weekend into next week. There
could also be showers and thunderstorms at times especially on

The greatest concern will be across western Wyoming where copious
amounts of snow remain in the headwaters of area creeks and rivers.
The Pacific Creek will rise to levels above action stage.

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

U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
Page last modified: May 16, 2007
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