National Weather Service Text Product Display

Extended Streamflow Guidance
Issued by NWS
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FGUS65 KSTR 051713
ESGUT

National Weather Service
Colorado Basin River Forecast Center
Salt Lake City, Utah
June 5, 2013

                       FLOOD POTENTIAL OUTLOOK
                                UTAH

Eastern Great Basins:
The spring runoff flood potential for the Eastern Great Basin is very low
and looks to be over for the 2013 season. Most locations in the basin peaked
during May and the snow cover is currently at or below 20% of average. Several
headwaters such as Big and Little Cottonwood Canyon and Smiths Fork nr the
Wyoming Border with Utah have an outside chance of a second peak however the
forecasted values are below even the statistical average peak. Rain on snow
could cause higher peaks but no rain is forecast through June 11 and the snow
pack should be gone at that time.

May Monthly precipitation for the Great Salt Lake Basin was 68% of average and
seasonal precipitation was 84% of average. Temperatures are forecast to spike
by June 8th and runoff 2013 should come to an end.


Duchesne, Price and San Rafael River Basins:
The 2013 spring runoff flood potential due to snowmelt is not high at
this time for the Duchesne, Price and San Rafael basins.  Peak flows
due to snowmelt have occurred in the Duchesne, Price and San Rafeal
basins with the exception a few headwater locations.  Headwater locations
such as the Uinta and Yellowstone rivers have a chance of
returning to or exceeding the high flows seen in May over
the next week.

May precipitation was below average at 55 and 90
percent of average in the Duchesne and Price/San Rafael
basins. Seasonal precipitation is still below average
near 80 percent of average in both basins. As a result of
warm and dry conditions in May, the only remaining snow
exists only at the highest elevations and is rapidly melting.

Virgin and Sevier River Basins:
The 2013 spring runoff flood potential due to snowmelt is very low as of June 1
for the Virgin and Sevier River Basins. The snowpack in the Virgin River Basin
has melted out.  The Sevier Basin snowpack exists only at the highest elevations
along the ridges and is nearly melted out. Snowmelt-driven peak flows for the
2013 runoff season occurred in late April and early May in the Virgin and Sevier
River Basins.

Precipitation in the Virgin and Sevier River Basins was again below average for
May at 65 to 75 percent of average. Streamflows for May were low (30 to 50 percent
of average).

The current forecast are availabe through the following link:
http://www.cbrfc.noaa.gov/rmap/peak/peaklist.php


CBRFC/B.Bernard, A.Nielson, S.Bender

NNNN
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National Weather Service Weather Forecast Office
