Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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AGAK78 PACR 222246
HMDACR

AGAK78 PACR DDHHMM
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT TUE JUL 22 2014

...FLOOD POTENTIAL...

FLOOD POTENTIAL IS CURRENTLY LOW FOR THE STATE.

...HYDROMETEOROLOGICAL DISCUSSION...

THIS MORNING THE UPPER LEVEL PATTERN HAS A BROAD LOW NORTH OF BARROW
WITH A TROUGH OVER THE WESTERN MAINLAND EXTENDING SOUTH OF THE
AKPEN... WITH A LOW IN THE BASE OF THE TROUGH.  THERE IS ANOTHER LOW
SOUTH OF THE SOUTHERN PANHANDLE... AND RIDGES FROM THE NORTH PACIFIC
THROUGH THE GULF INTO THE SOUTHERN YUKON TERRITORY AND OVER THE
WESTERN BERING.  OVER THE NEXT 36-48 HOURS THE TROUGH WILL
STRENGTHEN AND MOVE SLOWLY EASTWARD AS ANOTHER SHORTWAVE ROTATES
INTO THE NORTHERN MAINLAND.  AT THE SAME TIME THE LOW IN THE BASE OF
THE TROUGH WILL MOVE INTO THE CENTRAL GULF... PUSHING THE RIDGE IN
THE GULF OFF TO THE SOUTHEAST.

THIS MORNING FREEZING LEVELS WERE AT THE SURFACE AT BARROW... RISING
TO 6100 FT AT KOTZEBUE AND THEN 8700 TO 11700 FT OVER THE REST OF
THE MAINLAND.  FREEZING LEVELS THEN LOWERED TO 6900 FT OVER SOUTHERN
SOUTHEAST.  OVER THE NEXT 24-48 HOURS FREEZING LEVELS WILL LOWER
OVER MOST OF THE STATE.

PRECIPITATION... SELECTED PRECIPITATION TOTALS OVER THE 24 HOURS
ENDING AT 4 AM TODAY:

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
KOYA2    KOYUKUK NWR RAWS     PC RG :  0.67
KTZA2    NOATAK RAWS          PC RG :  0.63
PANT     ANNETTE              PP RZ :  0.58
KAVA2    KAVET CREEK RAWS     PC RG :  0.56
SRKA2    SQUIRREL RIVER RAWS  PC RG :  0.43
KELA2    KELLY RIVER RAWS     PC RG :  0.40
HDOA2    HOODOO HILLS RAWS    PC RG :  0.39
CRUA2    COLVILLE RIVER       PC RG :  0.38
CLEA2    CLEAR CREEK          PC RG :  0.38
UMTA2    UMIAT AIRFIELD       PC RG :  0.36
PAKT     KETCHIKAN            PP RZ :  0.34
PABT     BETTLES              PP RZ :  0.34
AUKA2    AUKE BAY LARC        PP RZ :  0.32
QRZA2    QUARTZ CREEK RAWS    PC RG :  0.31
SHKA2    SHAKTOOLIK RIVER     PC RG :  0.30
OTKA2    OTUK CREEK           PC RG :  0.29
SHLA2    SHELTER COVE RAWS    PC RG :  0.27
HAYA2    HAYCOCK RAWS         PC RG :  0.25

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED CHANCES OF BELOW
NORMAL TEMPERATURES FOR THE NORTH SLOPE AND THE BROOKS RANGE... WITH
AN INCREASED CHANCE FOR ABOVE NORMAL TEMPERATURES ACROSS MOST OF THE
SOUTHERN MAINLAND AND OVER SOUTHEAST ALASKA.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED CHANCES OF BELOW
NORMAL PRECIPITATION OVER THE SOUTHWEST MAINLAND... SEWARD
PENINSULA... AND THE NORTHWEST COAST.

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

THIS HYDROMET DISCUSSION WILL BE ISSUED DAILY UNTIL FREEZE-UP BEGINS
IN THE FALL.

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

$$

ACL


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