Extended Streamflow Guidance
Issued by NWS

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FGUS65 KSTR 052138
ESGCO

NATIONAL WEATHER SERVICE
COLORADO BASIN RIVER FORECAST CENTER
SALT LAKE CITY, UT


                      SPRING FLOOD POTENTIAL
             FOR THE COLORADO RIVER BASIN WITHIN COLORADO

                         FEBRUARY 5, 2019

The 2019 spring runoff flood potential due to snowmelt is not high at this time
for the Yampa/White, Upper Colorado mainstem, Gunnison, Dolores, and San Juan
basins. It should be emphasized that it is early in the snow accumulation
season and conditions can change before runoff begins.

January precipitation was above average in all basins across western Colorado
with values between 115 and 130 percent of average. Water year precipitation to
date (October to January) is near average:

Yampa/White               105%
Upper CO Mainstem         110%
Gunnison                  100%
Dolores/San Miguel        100%
San Juan                   90%


February 1st snow water equivalent is also near average across western
Colorado:

Yampa/White               110%
Upper CO Mainstem         110%
Gunnison                  100%
Dolores/San Miguel        105%
San Juan                   85%

The current volume forecasts for the April through July runoff period are
below average across western Colorado river basins. Highest forecasts,
as a percent of average, are in the Upper Colorado Mainstem basins which
generally range between 85 and 95 percent of average. The Yampa/White
forecasts range from 80 to 90 percent of average. Gunnison and Dolores
basin forecasts generally range from 70 to 85 percent of average and San
Juan basin forecasts generally range between 55 and 70 percent of average.

It is important to keep in mind that an extended period of much above normal
temperatures or heavy rainfall during the melt period can cause or exacerbate
flooding problems in any year. The spring runoff flood potential will be
re-evaluated in early March and an updated product will be issued.


CBRFC/Moser




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