Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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AGAK78 PACR 172255
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HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT TUE OCT 17 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 JUST WEST OF
THE CANADIAN ARCHIPELAGO... A LOW SOUTH OF THE AKPEN... AND FAST
WESTERLY FLOW OVER THE NORTH PACIFIC.  OVER THE NEXT COUPLE OF DAYS
THE NORTHERN LOW WILL MOVE TO NEAR CAPE BARROW WHILE DIGGING A
TROUGH OVER THE MAINLAND AND INTO THE GULF... BRINGING COLDER AIR
OVER THE STATE.  MEANWHILE THE GULF LOW WILL MOVE INTO BRITISH
COLUMBIA... BRINGING ANOTHER ROUND OF RAIN TO SOUTHEAST ALASKA.  BY
THURSDAY MORNING THE NEXT LOW WILL BE NEAR THE WESTERN ALEUTIANS.

...PRECIPITATION...

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

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
SAWA2    SPEEL ARM STATION    PC RZ :  1.41
DBWA2    DRY BAY GLACIER BAY  PC RG :  1.02
SNEA2    SNETTISHAM POWER STN PC RZ :  0.98
GNUA2    NUNATAK UPPER        PC RG :  0.84
GNLA2    NUNATAK LOWER        PC RG :  0.84
PADK     ADAK                 PP RZ :  0.80
LLKA2    LONG LAKE SNOTEL     PC RM :  0.80
PPSA2    POWDER PATCH STATION PC RZ :  0.76
PAAK     ATKA                 PP RZ :  0.69
PAKW     KLAWOCK AIRPORT      PP RZ :  0.67
ZMBA2    ZAREMBO ISLAND SOUTH PC RG :  0.63
SCSA2    SAWMILL CREEK        PC RG :  0.54
JTMA2    MT ROBERTS TRAM      PC RZ :  0.53
CRGA2    CRAIG WEATHER STN    PC RG :  0.48
PAPG     PETERSBURG AIRPORT   PP RZ :  0.47
PAOH     HOONAH               PP RZ :  0.46
KKEA2    KAKE RAWS            PC RG :  0.46
HADA2    HAIDA RAWS           PC RG :  0.45
AUKA2    AUKE BAY             PP RZ :  0.41
MNDA2    MENDENHALL LAKE      PC RG :  0.40
JDTA2    JUNEAU DOWNTOWN LARC PC RP :  0.39
PASI     SITKA AIRPORT        PP RZ :  0.38
MCAA2    MONTANA CREEK        PC RG :  0.38
GQIA2    QUEEN INLET GLACIER  PC RG :  0.37
PANT     ANNETTE AIRPORT      PP RZ :  0.35
SPCA2    SHEEP CAMP RAWS      PC RG :  0.35
SRYA2    SITUK RIVER          PC RG :  0.34
PAJK     JUNEAU FORECAST      PP RZ :  0.32
MREA2    MOORE CREEK BRIDGE   PC RM :  0.30
PAFE     KAKE                 PP RZ :  0.29
META2    AK METLAKATLA 6S     PP RG :  0.29
PAKT     KETCHIKAN AIRPORT    PP RZ :  0.27
HONA2    HOONAH RAWS          PC RG :  0.27
SHLA2    SHELTER COVE RAWS    PC RG :  0.26

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED PROBABILITIES OF
BELOW NORMAL TEMPERATURES OVER THE WESTERN MAINLAND AND OVER
SOUTHERN 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 MUCH OF THE SOUTHERN 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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