Flood Potential Outlook
Issued by NWS Riverton, WY

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FGUS75 KRIW 052006
Hydrologic Outlook
National Weather Service Riverton WY
206 PM MDT Thu Apr 5 2018

...Increased snowmelt runoff below 8000 feet expected
Friday afternoon through Saturday afternoon...

...Minor flooding of low lying areas possible over
Star Valley and Jackson Hole Saturday afternoon through
early Sunday...

There is still 10 to 20 inches of snow on the ground in
several areas along Star Valley and Jackson Hole. The low
elevation snowpack has become very ripe or water laden in
the last few weeks.

Afternoon valley temperatures are expected to warm into the
mid 40s to around 50 through Saturday across far western Wyoming.  Rainfall, of one quarter to one half in is expected from later
this afternoon through tonight. Another half inch to three quarters of
inch of rain is expected for Saturday. Snow levels are expected to
fluctuate around 7500 to 8000 feet through Friday and around 9000
feet on Saturday.

Expect noticeable increases in snowmelt runoff below 8000 feet
Friday afternoon through Saturday afternoon. A combination of
rainfall and snowmelt runoff over Star Valley and Jackson
Hole will cause noticeable sharp rises along small creeks and
streams Saturday night through early Sunday. Minor flooding
is possible along low lying areas.

Residents living along small creeks and streams in Jackson Hole
and in Star Valley should be vigilant for possible significant
rises in water levels Saturday afternoon through late Sunday.
Road crossings along low lying areas may become hazardous due
to rising waters.

Snowmelt runoff is also expected to increase Friday afternoon
through Saturday afternoon across the Greys River Basin to include
the Porcupine Slide area.

Graphical forecasts are available at:
Visit weather.gov/riverton and select the rivers & lakes tab for
graphical forecasts and additional information.

Team Riverton

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