Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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AGAK78 PACR 162303
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT MON OCT 16 2017

...FLOOD POTENTIAL...

THE FLOOD POTENTIAL IS CURRENTLY LOW FOR THE ENTIRE STATE.

...HYDROMETEOROLOGICAL DISCUSSION....

AT 500 MB THIS MORNING THERE IS A LARGE LOW CENTERED OVER THE
WESTERN EDGE OF THE CANADIAN ARCHIPELAGO... A LOW IN THE NORTHERN
GULF... AND ANOTHER LOW OVER THE WESTERN ALEUTIANS.  OVER THE NEXT
DAY THE GULF LOW WILL MOVE INTO CANADA... THE ALEUTIAN LOW WILL MOVE
SOUTH OF THE AKPEN... AND THE NORTHERN LOW WILL MOVE SLOWLY
WESTWARD.  THE LOW SOUTH OF THE AKPEN WILL MOVE INTO THE GULF BY
WEDNESDAY MORNING AS THE NORTHERN LOW CONTINUES TO MOVE SLOWLY
WESTWARD AS A TROUGH DIGS TO THE SOUTHWEST OVER THE MAINLAND.  THIS
SETUP WILL BRING COLDER AIR INTO THE STATE... AND KEEP PERIODS OF
RAIN OVER SOUTHEAST ALASKA AND THE NORTH GULF COAST.

...PRECIPITATION...

SELECTED 24 HOUR PRECIPITATION AMOUNTS ENDING AT 4 AM AKDT TODAY:

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
SNEA2    SNETTISHAM POWER STN PC RZ :  3.59
SAWA2    SPEEL ARM STATION    PC RZ :  1.91
DBWA2    DRY BAY GLACIER BAY  PC RG :  1.45
HONA2    HOONAH RAWS          PC RG :  1.30
LLKA2    LONG LAKE SNOTEL     PC RM :  1.20
HADA2    HAIDA RAWS           PC RG :  1.05
SCSA2    SAWMILL CREEK        PC RG :  0.82
JTMA2    MT ROBERTS TRAM      PC RZ :  0.78
PPSA2    POWDER PATCH STATION PC RZ :  0.75
MNDA2    MENDENHALL LAKE      PC RG :  0.73
PASI     SITKA AIRPORT        PP RZ :  0.70
PAKW     KLAWOCK AIRPORT      PP RZ :  0.70
CRGA2    CRAIG WEATHER STN    PC RG :  0.70
SPCA2    SHEEP CAMP RAWS      PC RG :  0.68
PAPG     PETERSBURG AIRPORT   PP RZ :  0.65
BLTA2    BARTLETT COVE        PC RG :  0.61
PAGN     ANGOON               PP RZ :  0.60
GNUA2    NUNATAK UPPER        PC RG :  0.56
GNLA2    NUNATAK LOWER        PC RG :  0.54
PAGS     GUSTAVUS             PP RZ :  0.44
THOA2    THORNE BAY RAWS      PC RG :  0.42
SHLA2    SHELTER COVE RAWS    PC RG :  0.41
ZMBA2    ZAREMBO ISLAND SOUTH PC RG :  0.40
MOGA2    MOTHER GOOSE LAKE    PC RG :  0.38
MCAA2    MONTANA CREEK        PC RG :  0.38
KMVA2    KENSINGTON VALLEY    PC RZ :  0.37
PAMM     METLAKATLA           PP RZ :  0.36
PAKT     KETCHIKAN AIRPORT    PP RZ :  0.35
PAPN     PILOT POINT          PP RZ :  0.33
KKEA2    KAKE RAWS            PC RG :  0.33
PACD     COLD BAY             PP RZ :  0.32
CZOA2    CHISTOCHINA RAWS     PC RG :  0.29
PANT     ANNETTE AIRPORT      PP RZ :  0.26

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED PROBABILITIES OF
BELOW NORMAL TEMPERATURES OVER MOST OF THE WESTERN AND SOUTHERN
MAINLAND... AS WELL AS OVER SOUTHEAST ALASKA.  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 OVER MOST OF THE SOUTHERN HALF OF THE
MAINLAND AND OVER SOUTHEAST ALASKA.  NEAR NORMAL PRECIPITATION IS
LIKELY OVER THE REST OF THE STATE.

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

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

THIS TEXT PRODUCT WILL BE ISSUED DAILY UNTIL FREEZEUP IN THE FALL. A
GRAPHICAL VERSION OF THE HYDROMET DISCUSSION IS AVAILABLE AT
HTTP://WWW.WEATHER.GOV/APRFC/GRAPHICALHMD

$$
ACL



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