Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1
000
AGAK78 PACR 132257
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT FRI APR 13 2018

...FLOOD POTENTIAL...

SMALL ICE JAMS ON THE ANCHOR RIVER ARE CAUSING LOCALIZED ELEVATED
WATER LEVELS... BUT FLOODING IS NOT EXPECTED AT THE CURRENT TIME.

THE FLOOD POTENTIAL IS CURRENTLY LOW FOR THE STATE.

...HYDROMETEOROLOGICAL DISCUSSION....

AREAS OF LOW PRESSURE IN THE GULF AND NEAR THE CANADIAN ARCHIPELAGO
WILL BE PUSHED OFF TO THE SOUTHEAST AND NORTHEAST THIS WEEKEND AS A
RIDGE BUILDS OVER THE GULF AND MAINLAND ALASKA AND ANOTHER LOW MOVES
INTO THE WESTERN BERING.  THE FRONT FROM THE WESTERN BERING SYSTEM
WILL BEGIN TO BRING PRECIPITATION TO SOUTHWEST ALASKA LATE SATURDAY
AND BEGIN TO FALL APART BY LATE MONDAY.

...SNOW DEPTH...

REPORTED SNOW DEPTHS AROUND THE STATE RANGE FROM NO SNOW AT SOME
STATIONS ON KODIAK ISLAND... THE AKPEN... AND MANY LOW ELEVATION AND
COASTAL STATIONS IN SOUTHEAST ALASKA... TO 117 INCHES AT A STATION
NEAR THE TOP OF MOUNT ALYESKA.  SNOW DEPTHS HAVE DECREASED AT MOST
LOCATIONS OVER THE PAST WEEK.

NRCS SNOW WATER EQUIVALENT DATA SHOW GREATER THAN NORMAL SNOW WATER
CONTENT IN THE HILLS NORTHEAST OF FAIRBANKS AND NEAR BETTLES...
GENERALLY LOWER THAN NORMAL SNOW WATER CONTENT FROM THE KENAI
PENINSULA NORTH THROUGH THE SUSITNA VALLEY... AND NEAR NORMAL SNOW
WATER CONTENT IN THE EASTERN COPPER RIVER VALLEY.

...ICE THICKNESS...

ICE THICKNESS READINGS ARE TAKEN AT THE START OF THE MONTH ONCE THE
ICE IS THICK ENOUGH TO SAFELY MEASURE.  ICE THICKNESS MEASUREMENTS
REPORTED FOR EARLY APRIL INCLUDE: 25 TO 28 INCHES IN ANCHORAGE... 28
INCHES NEAR WASILLA... 20 INCHES NEAR MCCARTHY... 36 INCHES AT LAKE
MINCHUMINA... 33 TO 37 INCHES ON THE LOWER KUSKOKWIM... 25 TO 31
INCHES IN THE FAIRBANKS-MIDDLE TANANA BASIN AREA... 40 INCHES AT
EAGLE... 24 INCHES AT GALENA... 34 INCHES ON KOTZEBUE LAKE... 37
INCHES ON THE SELAWICK RIVER... 20 INCHES AT BETTLES... AND 48
INCHES AT COLVILLE VILLAGE.

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED PROBABILITIES OF
ABOVE NORMAL TEMPERATURES OVER THE WESTERN MAINLAND.  THERE ARE
INCREASED PROBABILITIES OF BELOW NORMAL TEMPERATURES OVER THE
EASTERN INTERIOR AND MUCH OF THE NORTHEAST MAINLAND.  NEAR NORMAL
TEMPERATURES ARE LIKELY OVER THE REST OF THE STATE.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED PROBABILITIES OF
ABOVE NORMAL PRECIPITATION FROM THE BRISTOL BAY COAST EASTWARD
ACROSS GULF COASTAL REGIONS AND OVER SOUTHEAST ALASKA.  NEAR NORMAL
PRECIPITATION IS LIKELY OF THE REST OF THE MAINLAND.

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

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

THIS TEXT PRODUCT WILL BE ISSUED WEEKLY ON FRIDAY UNTIL RIVER ICE
BREAKUP IN MAY 2018. A GRAPHICAL VERSION OF THE HYDROMET DISCUSSION
IS AVAILABLE AT HTTP://WWW.WEATHER.GOV/APRFC/GRAPHICALHMD

$$
ACL



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.