Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT FRI APR 24 2015

...FLOOD POTENTIAL...

OVERFLOW DUE TO AUFIES IN THE SAGAVANIRKTOK RIVER IS EXPECTED TO
CONTINUE TO CAUSE FLOODING ON THE DALTON HIGHWAY NEAR PRUDHOE BAY ON
THE NORTH SLOPE.

FLOOD POTENTIAL IS LOW FOR THE REST OF THE STATE.

...HYDROMETEOROLOGICAL DISCUSSION...

THE MAJOR WEATHER MAKER FOR THIS WEEKEND IS A LARGE UPPER LEVEL LOW
OVER THE SOUTHEASTERN BERING.  THIS SYSTEM WILL MOVE INTO THE
SOUTHERN GULF BY SATURDAY NIGHT... THEN WEAKEN AS IT MOVES SLOWLY
NORTHWARD EARLY NEXT WEEK.  THERE WILL BE A DIMINISHING CHANCE OF
SHOWERS ACROSS THE MAINLAND THIS WEEKEND... WITH MORE WIDESPREAD
PRECIPITATION RETURNING TO SOUTHEAST EARLY SUNDAY AS A FRONT MOVES
ONSHORE.

...SNOW DEPTH...

OVER THE PAST WEEK SNOW DEPTHS DECREASED AT MOST RECORDING STATIONS
AROUND THE STATE.  SNOW WATER EQUIVALENTS ARE LESS THAN 50% OF
NORMAL ON THE KENAI PENINSULA AND ARE GENERALLY BETWEEN 50 AND 100%
OF NORMAL OVER MUCH OF THE REST OF SOUTHCENTRAL ALASKA... WHILE SNOW
WATER EQUIVALENTS ARE GENERALLY BETWEEN 50 AND 150% OF NORMAL IN
MUCH OF THE COPPER RIVER BASIN AND THE INTERIOR.

...ICE THICKNESS...

ICE THICKNESS MEASURED NEAR THE BEGINNING OF APRIL INCLUDED: 26 TO
40 INCHES IN THE MIDDLE TANANA BASIN... 56 INCHES AT EAGLE ON THE
YUKON... 11 INCHES ON THE KENAI PENINSULA... 18 INCHES IN
ANCHORAGE... 29 TO 42 INCHES IN THE KUSKOKWIM BASIN... 34 INCHES AT
BETTLES ON THE KOYUKUK RIVER... AND 65 INCHES AT COLVILLE VILLAGE.

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED CHANCES OF ABOVE
NORMAL TEMPERATURES OVER THE ENTIRE STATE.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED CHANCES FOR
ABOVE NORMAL PRECIPITATION OVER MOST OF SOUTHEAST ALASKA.  THERE ARE
INCREASED CHANCES FOR BELOW NORMAL PRECIPITATION OVER MOST OF THE
MAINLAND.

PLEASE REFER TO THE CLIMATE PREDICTION CENTER HOME PAGE FOR FURTHER
INFORMATION.

....................................................................

THIS HYDROMET DISCUSSION WILL BE ISSUED EVERY FRIDAY UNTIL BREAKUP
BEGINS IN THE SPRING.

A GRAPHICAL VERSION OF THE HYDROMET DISCUSSION IS AVAILABLE AT
HTTP://APRFC.ARH.NOAA.GOV/PRODUCTS/GHMD.PHP

A GRAPHICAL SLIDE SHOW PRESENTATION OF HYDROMET ISSUES IS AVAILABLE
AT HTTP://APRFC.ARH.NOAA.GOV/PRODUCTS/PRESENT
$$

ACL


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