Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

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AGAK78 PACR 232237
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AGAK78 PACR DDHHMM
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT WED JUL 23 2014

...FLOOD POTENTIAL...

FLOOD POTENTIAL IS CURRENTLY LOW FOR THE STATE. HOWEVER IT SHOULD BE
NOTED THAT PERIODS OF RAIN WILL CONTINUE THOUGH THURSDAY OVER THE
CENTRAL BROOKS RANGE AND CREATE RAPID RISES ON SMALL STREAMS AND
RIVERS.

...HYDROMETEOROLOGICAL DISCUSSION...

A LONG WAVE TROUGH WITH SEVERAL SHORT WAVES AND A CLOSED LOW
EMBEDDED IN THE BASE EXISTED OVER THE WESTERN MAINLAND AND INTO THE
ALASKA PENINSULA ON TUESDAY. SHOWERS EXTEND FROM THE ALASKA
PENINSULA UP THROUGH THE WESTERN INTERIOR AND ACROSS THE EASTERN
BROOKS RANGE. THE HEAVIEST OF THESE SHOWERS WERE IN THE KOYUKUK AND
UPPER KOBUK RIVER BASINS.

THE LONG WAVE TROUGH IS SHOVED EAST BY THE BUILDING RIDGE IN THE
BERING AND ENDS UP NEAR THE AK-CAN BORDER BY TUESDAY. THIS PATTERN
GENERALLY MEANS THAT CONDITIONS WITH BE COOL CLOUDY AND IN SOME
CASES WET... ESPECIALLY OVER THE SOUTHEAST WHERE THE CLOSED LOW
TAKES PLENTY OF TIME TO TRANSITION ACROSS THE GULF. THE
SOUTHWESTERLY FLOW ACROSS THE MUCH OF THE MAINLAND WILL PRODUCE
PERIODS OF RAIN FROM THE Y-K DELTA AND BRISTOL BAY REGION TO THE
NORTH SLOPE WEDNESDAY INTO THURSDAY.

IN THE LONGER RANGE... THE RAIN REALLY DOESN`T GET STARTED ACROSS
MUCH OF THE SOUTHEAST UNTIL FRIDAY MORNING WHILE MOST OF THE
PRECIPITATION TRANSITIONS EASTWARD FROM SOUTHCENTRAL TO THE EASTERN
BROOKS RANGE.

THE FREEZING LEVEL WEDNESDAY MORNING WAS BETWEEN 6000 AND 8800 OVER
THE SOUTHERN MAINLAND AND PANHANDLE. FURTHER NORTH FREEZING LEVELS
FELL TO THE SURFACE... OR CLOSE TO IT. OVER THE NEXT 24-48 HOURS
FREEZING LEVELS WILL LOWER OVER MOST OF THE STATE...MOST NOTICEABLY
OVER THE NORTHERN HALF OF THE MAINLAND.

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

LOCATION NAME                 PE TS    24 HR
======== ====                 == ==    =====
DCKA2    DAHL CREEK NR KOBUK  PP RG :   0.86
IMYA2    IMELYAK RAWS         PP RG :   0.83
NRUA2    NORUTAK LAKE RAWS    PP RG :   0.71
PAFM     AMBLER               PP RZ :   0.69
PAMA2    PAMICHTUK LAKE       PP RG :   0.65
KOYA2    KOYUKUK NWR RAWS     PP RG :   0.65
COTA2    COTTONWOOD LAKE RAWS PC RG :   0.65
KAUA2    KALUICH              PP RG :   0.59
STNA2    STONY STRIP RAWS     PP RG :   0.56
PAGH     SHUNGNAK AIRPORT     PP RZ :   0.54
KAVA2    KAVET CREEK RAWS     PC RG :   0.52
CHMA2    CHIMNEY LAKE         PP RG :   0.51
RNDA2    ROUND LAKE RAWS      PP RG :   0.50
PATA     TANANA               PP RZ :   0.45
KAVA2    KAVET CREEK RAWS     PP RG :   0.42
KLIA2    KILLIK PASS          PP RG :   0.41
ATGA2    ATIGUN PASS SNOTEL   PC RM :   0.40
OTKA2    OTUK CREEK AT IVOTUK PP RG :   0.39
PALG     KALSKAG              PP RZ :   0.37
HOWA2    HOWARD PASS RAWS     PP RG :   0.37
PABT     BETTLES              PP RZ :   0.36

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED CHANCES OF BELOW
NORMAL TEMPERATURES FOR THE NORTHEAST... WITH AN INCREASED CHANCE
FOR ABOVE NORMAL TEMPERATURES ACROSS MOST OF THE SOUTHWEST MAINLAND
AND OVER SOUTHEAST.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED CHANCES OF BELOW
NORMAL PRECIPITATION OVER THE EAST AND AN INCREASED CHANCE OF ABOVE
NORMAL PRECIPITATION ACROSS THE PANHANDLE.

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

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

$$

ETH


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