National Weather Service Text Product Display

Extended Streamflow Guidance
Issued by NWS
Versions: 1
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FGUS65 KSTR 051608
ESGWY
COLORADO BASIN RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH


                     SPRING FLOOD POTENTIAL
          FOR THE GREEN AND BEAR RIVER BASINS IN WYOMING

                          June 5, 2013

The 2013 spring runoff flood potential due to snowmelt
is not high at this time for the Upper Green and Bear
River basins.

Peak flows due to snowmelt have most likely occurred in
the Upper Green and Bear River basins with the exception of
the headwater locations in the Upper Green. Flows in the
headwater locations in the Upper Green have a chance of
returning to or exceeding the high flows seen in May over
the next week. Currently, no locations have peaked or are forecast
to peak above flood flow. It is important to note that
forecast procedures and flood flow levels do not exist
for all streams. However, due to current conditions the
probability of any streams hitting flood flow due to snowmelt
is extremely low.

May precipitation was below average across southwest
Wyoming at 70 percent of average. Seasonal precipitation
is now 80-90 percent of average in both basins.
As of June 1st, nearly all of the SNOTEL locations had melted out.
However, the SNOTEL network does not well represent the upper elevations
of the Upper Green River basin. However, satellite imagery indicates
some snow remains at the highest elevations and is rapidly melting.


A list of specific spring peak flow forecasts as of June 5 are available at:
http://www.cbrfc.noaa.gov/gmap/list/list.php?type=peak

A map of the current spring peak flow forecasts is available at:
http://www.cbrfc.noaa.gov/gmap/cmap2.php?con=peak

CBRFC/Nielson

$$
National Weather Service Regional Office
