Flood Potential Outlook
Issued by NWS Cheyenne, WY

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Hydrologic Outlook
National Weather Service Cheyenne Wy
948 AM MDT THU MAY 7 2015

...Moderate rain still expected over watersheds in southeast Wyoming Friday
night through Saturday night...

...Minor flooding possible along small creeks and streams Saturday afternoon
through Sunday afternoon...

Rainfall amounts in the last 3 days over southeast Wyoming river basins have
varied from one half inch to an inch and a half. Active snomelt has been ongoing along
creeks and streams across southeast Wyoming for over a week.

Moderate rain is expected to start in southeast Wyoming Friday night and last
thorugh Saturday night. One to one and a half inches of rain is possible across
drainages with isolated areas of two inches of rain over orographically favored
watersheds,  At this time, the heaviest rain is expected over the Laramie River, ,
Lodgepole Creek, and Crow Creek Watersheds.

Rainfall runoff coupled with snowmelt runoff and saturated soils will
allow small creeks and streams across southeast Wyoming to flow at high levels
begining Saturday afternoon.  Minor flooding is possible along small streams
and creeks Saturday afternoon through Sunday afternoon.

Snow levels on Friday night through Saturday morning are still expected to be
around 7500 to 8500 feet, dropping to 5000 feet by early Sunday morning. Active
snowmelt runoff and rainfall runoff will drastically slow down by early Sunday
morning.

Local rainfall runoff could cause the Laramie River at Laramie to rise to near
bankfull conditions by Saturday night. Minor flooding is possible with bankfull
conditions along the Laramie River.  Lodepole and Crow Creeks may run at or
near bankfull conditions by Saturday night.

A flood watch may be issued Friday if the precipitation amount forecast
continues to pan out.

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


$$
JTFahey




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