Flood Potential Outlook
Issued by NWS Riverton, WY

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FGUS75 KRIW 091959
Hydrologic Outlook
National Weather Service Riverton WY
159 PM MDT Fri Jun 9 2017

...Rain on snowmelt events possible over the Upper Wind River Basin
Friday afternoon through Saturday morning and again on Sunday afternoon
through early Monday morning...

...Peak flows and stages along the Big and Little Wind Rivers by
Sunday through Tuesday of next week...

...Peak flow of 18,200 cfs forecasted along the Green River near
LaBarge by Monday afternoon of next week...

Afternoon temperatures at the 9,000 foot elevation are expected to
be 70 to 75 degrees on Friday. Temperatures will also be well above the
frost temperature of 37 degrees Friday through Sunday. Windy and very
warm mountain temperatures expected over the mountains on Friday afternoon
through Saturday morning.

Widespread rainshowers with possible heavy rain are expected across the
upper Wind River Basin Friday night through Saturday morning and again on
Monday afternoon through early Tuesday morning. Much cooler mountain
temperatures are expected Tuesday through Thursday of next week---
with temperatures at the 9,000 foot elevation forecasted
to be in the upper 40s to middle 50s. Snow levels are expected to drop down
to 8,500 to 9,000 feet by Tuesday afternoon.

Rain on snowmelt events will cause continued increases in stream and river levels
Saturday through Tuesday of next week. Very high flows are expected along
creeks and rivers over the Wind, Green, Shoshone, and Sweetwater Basins by
the weekend through early next week. Flooding of low lying areas will
become more severe and widespread along creeks and rivers through early next

The Little and Big Wind Rivers are expected to crest by Sunday through
Tuesday of next week. Peak stage at the Big Wind River at Riverton is
expected to be near 12.4 feet which will easily exceed the record peak stage
of 11.8 feet set in July of 2011. The Little Wind River near Riverton is still
expected to peak below the record stage of 11.9 feet set in 2010.  Peak flow
of 18,200 cfs is expected at the Green River near LaBarge by Monday afternoon
of next week--which still makes it the second highest flow recorded since 1947.

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


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