Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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AGAK78 PACR 222218
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT TUE AUG 22 2017

...FLOOD POTENTIAL...

FLOODING FOR THE TETLIN ROAD AT MILE 5.3 CONTINUES. TANANA RIVER IS
RECEDING... BUT IT WILL TAKE A FEW MORE DAYS FOR THE WATER TO CLEAR
THE ROAD.

HEAVY RAIN OVER THE SOUTHERN SOUTHEAST ON MONDAY AND INTO TUESDAY
RESULTED IN HIGH WATER IN AND AROUND KETCHIKAN AND CAUSED NUISANCE
FLOODING. A FLOOD ADVISORY REMAINS IN EFFECT UNTIL 4PM TUESDAY.

THE FLOOD POTENTIAL IS CURRENTLY LOW FOR THE REST OF THE STATE.

...HYDROMETEOROLOGICAL DISCUSSION....

THERE WAS A LARGE UPPER LEVEL LOW IN THE EASTERN GULF JUST OFF SHORE
OF THE PANHANDLE THIS MORNING WHILE THE OTHER WEATHER MAKER WAS
LINING UP TO CROSS THE NORTHWEST PART OF THE STATE. THE LOW NEAR THE
PANHANDLE REMAINS SOMEWHAT STATIONARY BEFORE MAKING A MOVE FOR
CANADA BY THURDAY MORNING. THE LOW IN THE NORTHWEST IS A LITTLE MORE
COMPLEX AND OPENS UP AND ABSORBS A SYSTEM COMING INTO THE CENTRAL
BERING. AS A RESULT... STRONG SOUTHWEST FLOW DEVELOPS BY WEDNESDAY
EVENING AND THE PRECIPITATION INTENSIFIES OVER THE SOUTHWEST INTO
SOUTHCENTRAL.

RAINFALL OVER THE SOUTHEAST TO THE GULF COAST TAPERS OFF
TREMENDOUSLY FROM VALUES TUESDAY MORNING AND RANGES FROM AN INCH TO
TWO INCHES. THE OTHER AREA OF ENHANCED PRECIPITATION WILL BE OVER
THE NORTHWEST WHERE MODERATE RAIN COULD PRODUCE UPWARDS OF AN INCH
BY WEDNESDAY MORNING.

...PRECIPITATION...

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

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
KPHA2    KETCHIKAN POWERHOUSE PP RZ :   6.26
PAKT     KETCHIKAN AIRPORT    PP RZ :   5.79
MPSA2    MOOSE PASS RR        PP RG :   5.30
SLVA2    SILVIS POWERHOUSE    PP RZ :   4.30
SHLA2    SHELTER COVE RAWS    PC RG :   3.85
HADA2    HAIDA RAWS           PC RG :   3.51
ZMBA2    ZAREMBO ISLAND SOUTH PP RG :   3.10
WLDA2    WHITMAN LAKE DAM     PP RZ :   2.72
KTNA2    BEAVER FALLS POWERHO PP RZ :   2.69
PAKW     KLAWOCK AIRPORT      PP RZ :   2.48
MHPA2    MITKOF HWY PETERSBUR PP RZ :   2.35
CRGA2    CRAIG WEATHER STATIO PP RG :   2.34
PAMM     METLAKATLA           PP RZ :   2.25
META2    AK METLAKATLA 6S     PP RG :   2.19
PAPG     PETERSBURG AIRPORT   PP RZ :   2.04
SPPA2    SNETTISHAM POWER PLA PP RZ :   1.94
LLKA2    LONG LAKE SNOTEL     PC RM :   1.90
PANT     ANNETTE AIRPORT      PP RZ :   1.88
PTBA2    POINT BAKER          PP RZ :   1.84
DBWA2    DRY BAY GLACIER BAY  PP RG :   1.80
PAWR     WHITTIER             PP RZ :   1.77
YUTA2    YAKUTAT 3 SSE CRN    PC R4 :   1.53
SAWA2    SPEEL ARM STATION 4- PC RZ :   1.50
GQIA2    QUEEN INLET GLACIER  PP RG :   1.50
THOA2    THORNE BAY RAWS      PC RG :   1.40
NUCA2    NUCHEK               PC R2 :   1.33
PAYA     YAKUTAT AIRPORT      PP RZ :   1.29
KKEA2    KAKE RAWS            PC RG :   1.28

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED PROBABILITIES OF
ABOVE NORMAL TEMPERATURES OVER THE EASTERN INTERIOR AND SOUTHEAST.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED PROBABILITIES OF
ABOVE NORMAL PRECIPITATION OVER THE SOUTHEASTERN THIRD OF THE
MAINLAND AND SOUTHEAST PANHANDLE.

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

$$
ETH



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