Pacific River Forecast Center Anchorage Ak

PACIFIC RIVER FORECAST CENTER ANCHORAGE AK

2 PM FRI APRIL 10 2015

...SPRING BREAKUP OUTLOOK FOR ALASKA....

THE SPRING BREAKUP FLOOD POTENTIAL IS CURRENTLY RATED AS LOW TO LOW-MODERATE

STATEWIDE. BREAKUP AT MOST LOCATIONS IS EXPECTED TO BE A FEW DAYS EARLIER THAN NORMAL. ALTHOUGH FLOOD POTENTIAL IS RATED AS LOW... FLOODING CAN STILL OCCUR IF ICE JAMS FORM DOWNSTREAM OF A VILLAGE.

OVER THE NEXT FEW WEEKS TEMPERATURES ARE LIKELY TO BE NEAR OR ABOVE NORMAL OVER MAINLAND ALASKA.

APRIL 1ST MEASUREMENTS INDICATE THAT ICE THICKNESS IS VARIABLE ACROSS THE STATE... ICE THICKNESS IN WESTERN AND INTERIOR ALASKA ARE BELOW NORMAL. ICE THICKNESS IS NORMAL IN THE MIDDLE YUKON AND NORMAL TO ABOVE NORMAL IN THE

UPPER YUKON BASIN. ACCUMULATED FREEZING DEGREE DAYS ARE WELL BELOW NORMAL

OVER MOST OF ALASKA.

THE APRIL 1ST SNOWPACK ANALYSIS SHOWS NORMAL TO BELOW NORMAL CONDITIONS IN INTERIOR ALASKA, AND NORMAL TO ABOVE NORMAL IN MOST OF THE CANADIAN YUKON.

FLOOD POTENTIAL FROM ICE JAMS WILL BE LOW FOR MOST OF THE STATE... WITH THE UPPER YUKON BEING THE PRIMARY AREA WITH A NORMAL FLOOD POTENTIAL FOR THE STRETCH FROM EAGLE DOWNSTREAM TO FORT YUKON.

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SNOWMELT FLOOD AVERAGE FORECAST

RIVER - REACH RUNOFF POTENTIAL BREAKUP BREAKUP

VOLUME DATE * DATE

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TANANA RIVER AVERAGE

FAIRBANKS LOW 4/30 4/24 - 4/30

NENANA LOW 5/1 4/25 - 5/1

YUKON RIVER (UPPER) AVERAGE

EAGLE LOW 5/5 4/30 - 5/6

FORT YUKON LOW 5/11 5/4 - 5/10

YUKON RIVER (MIDDLE) BELOW

RUBY LOW 5/12 5/3 - 5/9

GALENA LOW 5/13 5/4 - 5/10

KOYUKUK LOW 5/13 5/5 - 5/11

NULATO LOW 5/13 5/5 - 5/11

KALTAG LOW 5/14 5/6 - 5/12

YUKON RIVER (LOWER) BELOW

MARSHALL LOW 5/16 5/5 - 5/11

PILOT STATION LOW 5/17 5/6 - 5/12

MOUNTAIN VILLAGE LOW 5/19 5/8 - 5/14

KOYUKUK RIVER AVERAGE

BETTLES LOW 5/10 5/1 - 5/7

ALLAKAKET LOW 5/11 5/2 - 5/8

HUGHES LOW 5/11 5/3 - 5/9