UPDATED 3/9: Increased Chance for Ice Jam Flooding Through Early Next Week

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Summary | Monitoring & Reporting


...INCREASED SNOWMELT RUNOFF BELOW 8000 FEET CONTINUES THROUGH EARLY NEXT WEEK... 

Ice Jamming near Green River in Dec. 2011

AFTERNOON TEMPERATURES ARE EXPECTED TO WARM INTO THE 50S TO LOWER 60S ACROSS BASINS EAST OF THE CONTINENTAL DIVIDE SATURDAY THROUGH TUESDAY. ACROSS BASINS WEST OF THE DIVIDE...AFTERNOON TEMPERATURES ARE EXPECTED TO WARM TO NEAR 50 SATURDAY AND SUNDAY...COOLING INTO THE 40S BY MONDAY.

RIVERS THAT ARE STILL ICED OVER ACROSS THE REGION ARE EXPECTED TO SHOW SIGNIFICANT ICE BREAKUP THIS WEEKEND AND INTO EARLY NEXT WEEK. AS THE ICE BREAKS UP AND MOVES DOWNSTREAM...THERE WILL BE AN INCREASED CHANCE OF ICE JAMMING THAT MAY RESULT IN FLOODING. BRIDGES AND AREAS WHERE THE RIVER MAKES A SHARP TURN OR BEND ARE MOST SUSCEPTIBLE TO ICE JAMMING.

Ice Jamming Hydrograph near Green River in Dec. 2011
SNOWMELT RUNOFF BELOW 8000 FEET IS EXPECTED TO INCREASE SIGNIFICANTLY SATURDAY THROUGH TUESDAY. AS THE EXCESS RUNOFF MOVES OVER FROZEN AND SATURATED GROUND...THERE WILL BE AN INCREASED CHANCE FOR MINOR FLOODING. LOW LYING AREAS SUCH AS ROAD CROSSINGS WILL MOST SUSCEPTIBLE TO FLOODING.

REPORT ANY SIGNIFICANT ICE JAM FLOODING AND OR LOW LYING FLOODING TO EMERGENCY OFFICIALS.

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