Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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000
AGAK78 PACR 212253
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT MON JUL 21 2014

...FLOOD POTENTIAL...

FLOOD POTENTIAL IS LOW FOR THE STATE.

...HYDROMETEOROLOGICAL DISCUSSION...

THIS MORNING THE UPPER LEVEL PATTERN OVER THE STATE HAS AN OLD LOW
NORTH OF BARROW WITH A TROUGH INTO THE NORTHERN BERING... THIS
TROUGH IS SYNCHING WITH A LOW SOUTH OF THE CENTRAL ALEUTIANS.  THERE
IS ANOTHER LOW IN THE SOUTHEAST GULF... AND RIDGES FROM THE NORTH
PACIFIC INTO THE GULF AND THE SOUTHERN MAINLAND AND OVER THE WESTERN
BERING.  BY TOMORROW MORNING THE TROUGH IN THE NORTH AND THE LOW
NEAR THE ALEUTIANS SYNCH INTO A TROUGH EXTENDING FROM THE NORTHWEST
MAINLAND TO SOUTH OF THE EASTERN ALEUTIANS... THE TROUGH THEN MOVES
EAST TO COVER THE MAINLAND AND WESTERN GULF BY WEDNESDAY MORNING.
AS THE TROUGH MOVES EAST THE RIDGE OVER THE GULF AND SOUTHERN
MAINLAND... AND THE LOW IN THE SOUTHEAST GULF... GET PUSHED OFF TO
THE SOUTHEAST.

THIS MORNING FREEZING LEVELS WERE BETWEEN 8300 AND 13300 FT OVER THE
WESTERN HALF OF THE MAINLAND... LOWERING TO 5000 TO 7600 FT OVER THE
EASTERN MAINLAND AND SOUTHEAST ALASKA.  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
======== ====                 == ==   =====
BGLA2    BERING GLACIER RAWS  PC RG :  1.10
PANT     ANNETTE              PP RZ :  0.71
SRYA2    SITUK RIVER          PC RG :  0.50
PAKT     KETCHIKAN            PP RZ :  0.41
PAYA     YAKUTAT              PP RZ :  0.38
CBHA2    CORDOVA BOAT HARBOR  PC RP :  0.37
MCAA2    MONTANA CREEK        PC RG :  0.32
PASI     SITKA                PP RZ :  0.31
MDBA2    COPPER RIVER         PC RG :  0.30
BKLA2    BUCKLAND UPLANDS     PC RG :  0.30
SHLA2    SHELTER COVE RAWS    PC RG :  0.27
VDEA2    VALDEZ HANDAR        PC RP :  0.26
PAWI     WAINWRIGHT           PP RZ :  0.26
PAJK     JUNEAU WFO           PP RZ :  0.22
UCEA2    UPPER CHENA DOME     PC R2 :  0.21
THOA2    THORNE BAY RAWS      PC RG :  0.21
PHLA2    PHELAN CREEK         PC RG :  0.21
SOUA2    SOULE RIVER          PC RG :  0.20
PATO     PORTAGE GLACIER      PP RZ :  0.20
PAJN     JUNEAU               PP RZ :  0.20
CZOA2    CHISTOCHINA RAWS     PC RG :  0.20
BLTA2    BARTLETT COVE        PC RG :  0.20
AUKA2    AUKE BAY LARC        PC RP :  0.20

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED CHANCES OF BELOW
NORMAL TEMPERATURES FOR MOST OF 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 MOST OF THE MAINLAND SOUTH OF THE BROOKS
RANGE.

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

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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