Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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AGAK78 PACR 272305
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HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT THU AUG 26 2015

...FLOOD POTENTIAL...

A WIDESPREAD WETTING RAIN HIT THE MOST OF THE MAINLAND ON WEDNESDAY.
RAINFALL AMOUNTS OF BETWEEN A HALF AND AN INCH SPREAD OVER A LARGE
PORTION OF THE MAINLAND WITH EMBEDDED 1 TO 2 INCH AMOUNTS IN THE
ALASKA AND BROOKS RANGE AS WELL AS THE YUKON-TANANA UPLANDS. A FLOOD
ADVISORY HAS BEEN ISSUED FOR THE SOUTH FORK OF THE KUSKOKWIM RIVER
AND THE CHENA RIVER INCLUDING OTHER NEARBY SMALL STREAMS. PLEASE
REFER TO THE LATEST ADVISORY FOR THE MOST UP TO DATE INFORMATION.

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

...HYDROMETEOROLOGICAL DISCUSSION...

THE FIGHT BETWEEN THE RIDGE OVER THE NORTHERN PACIFIC AND THE ARCTIC
LOW WILL RESULT IN A STRONG JET STREAM OVER SOUTHERN MAINLAND. THE
DYNAMICS ASSOCIATED WITH THIS RESULTS IN THE DEVELOPMENT OF CLOSED
LOW IN THE GULF BY FRIDAY MORNING. THE PRECIPITATION THAT IS
PREDICTED TO ACCOMPANY THE FRONT THAT SWINGS THROUGH FROM AN
UNUSUALLY NORTHERLY DIRECTION WILL BE QUITE EXTENSIVE AND RANGE
BETWEEN AN INCH TO 1.5 INCHES OVER THE NORTHERN PANHANDLE BY THURDAY
NIGHT. THE CONTINUATION OF THIS SYSTEM SOUTH RESULTS IN 2 TO 3
INCHES OF RAIN POSSIBLE OVER THE SOUTHERN END THROUGH FRIDAY NIGHT
AS THE SYSTEM STALLS.

MEANWHILE SHORT WAVE ACTIVITY AROUND THE ARCTIC LOW KEEPS SHOWERS
GOING ACROSS THE INTERIOR SHOWERS WILL CONTINUE THROUGH FRIDAY
MORNING.

...PRECIPITATION...

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

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
UNCA2    UPPER NOME CREEK     PC RM :   2.00
STUA2    STUART CREEK RAWS    PP RG :   1.90
LCRA2    LITTLE CHENA RIDGE S PC RM :   1.90
TKLA2    TOKLAT RAWS          PC RG :   1.80
MSOA2    MUNSON RIDGE SNOTEL  PP RG :   1.68
UCEA2    UPPER CHENA DOME SNO PP RG :   1.59
SMTA2    SALMON TROUT RAWS    PP RG :   1.59
PHLA2    PHELAN CREEK NR PAXS PP RG :   1.57
AGLA2    ANGEL CREEK RAWS     PP RG :   1.56
MNCA2    MONUMENT CREEK SNOTE PP RG :   1.51
DCKA2    DAHL CREEK NR KOBUK  PP RG :   1.45
SNKA2    SNAKE RIVER NEAR NOM PP RZ :   1.41
MTRA2    MT RYAN SNOTEL       PP RG :   1.34
CPKA2    POKER CREEK RAWS     PC RG :   1.31
KSHA2    KANTISHNA            PC RM :   1.30
GOBA2    GOBBLERS KNOB SNOTEL PC RM :   1.30
WONA2    WONDER LAKE RAWS     PP RG :   1.28
MTRA2    MT RYAN SNOTEL       PC RM :   1.20
MANA2    MANCHU               PP RG :   1.18
PMNA2    GALENA RAWS AT POORM PP RG :   1.13
SLRA2    SALCHA RIVER RAWS    PP RG :   1.11
WICA2    WICKERSHAM DOME NEAR PP RG :   1.09
SMPA2    STAMPEDE AIRSTRIP    PP RG :   1.08
PAMA2    PAMICHTUK LAKE       PP RG :   1.00
BFLA2    BETTLES FIELD        PC RM :   1.00
IMYA2    IMELYAK RAWS         PC RG :   0.99
TRSA2    TWO RIVERS           PC RG :   0.97

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED PROBABILITIES OF
ABOVE NORMAL TEMPERATURES OVER THE WEST AND ALASKA PENINSULA.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED PROBABILITIES OF
ABOVE NORMAL PRECIPITATION OVER THE WEST.

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

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

A GRAPHICAL VERSION OF THE HYDROMET DISCUSSION IS AVAILABLE AT
HTTP://APRFC.ARH.NOAA.GOV/PRODUCTS/GHMD.PHP

A GRAPHICAL SLIDE SHOW PRESENTATION OF HYDROMET ISSUES IS AVAILABLE
AT HTTP://APRFC.ARH.NOAA.GOV/PRODUCTS/PRESENT
$$

ETH



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