Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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AGAK78 PACR 282250
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT THU AUG 28 2014

...FLOOD POTENTIAL...

THE FLOOD POTENTIAL IS CURRENTLY LOW.

...HYDROMETEOROLOGICAL DISCUSSION...

THE CLOSED LOW NORTH OF NORTHWEST ALASKA WILL SLOWLY APPROACH THE
STATE THROUGH SATURDAY...THEN BECOME STATIONARY JUST OFFSHORE. AN
UPPER TROUGH CURRENTLY OVER THE WESTERN GULF OF ALASKA... WILL PIVOT
THROUGH THE GULF... TO SOUTHEAST ALASKA BY SATURDAY. AN ASSOCIATED
SURFACE LOW WILL MOVE THROUGH THE GULF. THE NEXT UPPER TROUGH WILL
MOVE INTO THE BERING SEA ON FRIDAY...AND SWEEP THROUGH THE GULF
SATURDAY AND SUNDAY. THERE WILL BE ANOTHER SURFACE LOW ASSOCIATED
WITH THIS TROUGH. THE SURFACE FRONT THAT ENTERED NORTHWEST ALASKA
HAS SLOWED... BUT WILL CONTINUE TO MOVE THROUGH THE INTERIOR THROUGH
SATURDAY.

THE SYSTEM MOVING THROUGH THE GULF WILL DROP SIGNIFICANT
PRECIPITATION ALONG THE GULF COAST TODAY INTO FRIDAY. THE HEAVIEST
AMOUNTS WILL BE IN THE PRINCE WILLIAM SOUND AND THE EASTERN PORTION
OF THE KENAI PENINSULA TODAY... WHERE UP TO 3 INCHES MAY FALL. THE
HEAVIEST RAIN WILL MOVE INTO SOUTHEAST ALASKA FOR FRIDAY... WITH UP
TO 2 INCHES EXPECTED. THE NEXT TROUGH WILL MOVE BRING ANOTHER INCH
OR TWO FOR PRINCE WILLIAM SOUND AND YAKUTAT AREAS FOR FRIDAY INTO
SATURDAY. THE PRECIPITATION WITH THE NORTHERN FRONT WILL PROVIDE THE
NORTH SLOPE AND INTERIOR WITH ABOUT A QUARTER INCH TO A HALF INCH.
RAIN WILL CHANGE TO SNOW OVER THE NORTH SLOPE. ANOTHER WAVE OF
RAIN/SNOW WILL MAKE LANDFALL OVER NORTHWEST ALASKA FRIDAY NIGHT.

FREEZING LEVELS OVER THE MAINLAND RANGED FROM 5000 TO 7000 FEET WITH
SLIGHT HIGHER VALUES OVER THE PANHANDLE AND ALEUTIANS. THE EXCEPTION
IS EXTREME NORTHWEST ALASKA... WHERE THEY RANGED FROM 1000-3000
FEET. SATURDAY`S FREEZING LEVELS OVER NORTHERN ALASKA WILL DIP TO
THE 1000 TO 3000 FOOT LEVEL. THE REST OF ALASKA WILL RANGE FROM THE
4000 TO 7000 FOOT LEVEL.

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

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
PEDA2    PEDERSEN LAGOON      PC RG :  3.15
FPKA2    FOURPEAKED RAWS      PC RG :  2.30
PATO     PORTAGE GLACIER      PP RZ :  1.77
WLVA2    WOLVERINE GLACIER NR PC R2 :  1.44
CKLA2    CAPE KIAVAK RAWS     PC RG :  1.08
INPA2    INDIAN PASS SNOTEL   PC RM :  1.00
PAWD     SEWARD               PP RZ :  0.94
GROA2    GROUSE CREEK SEWARD  PC RG :  0.91
EXGA2    EXIT GLACIER         PC RM :  0.90
ECBA2    EAGLECREST BASE      PP RZ :  0.84
RESA2    RESURRECTION RIVER A PC RG :  0.83
HRDA2    HARDING ICE FIELD    PC RG :  0.82
SUVA2    SUSITNA VALLEY HIGH  PC RM :  0.80
CGMA2    CHIGMIT MOUNTAINS    PC RG :  0.77
MCPA2    MCARTHUR PASS        PC RG :  0.72
TUXA2    TUXEDNI PARK LARC    PC RP :  0.70
NUCA2    NUCHEK               PC RM :  0.70
WLCA2    WOLVERINE CREEK NR L PC RG :  0.64
UNRA2    UPPER NUKA RIVER NR  PC RG :  0.63
RUGA2    RUTH GLACIER RAWS    PP RG :  0.63
PATK     TALKEETNA            PP RZ :  0.63
HATA2    HATCHER PASS         PC R2 :  0.60
PADQ     KODIAK               PP RZ :  0.57

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED CHANCES OF BELOW
NORMAL TEMPERATURES FOR MOST OF THE INTERIOR. THE GULF COAST AND THE
WEST COAST OF ALASKA HAVE INCREASED CHANCES OF ABOVE NORMAL TEMPERATURES.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED CHANCES OF ABOVE
NORMAL PRECIPITATION OVER NORTHERN MAINLAND. THE SOUTHERN HALF OF
ALASKA HAS INCREASED CHANCES OF BELOW NORMAL PRECIPITATION.

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

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

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

$$

KFM


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