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AGAK78 PACR 112247
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT SAT OCT 11 2008

...FLOOD POTENTIAL...

LOCALLY HEAVY RAIN CAUSED SHARP RISES ACROSS THE NORTH GULF
COAST THURSDAY NIGHT AND FRIDAY. AS THE HEAVIEST RAIN MOVES
EAST SMALL STREAM FLOODING IS POSSIBLE OVER THE EASTERN NORTH
GULF COAST.

ANALYSIS OF GAGES ON THE ALSEK RIVER SUGGESTS THAT THE
TWEEDSMUIR GLACIER HAS NOT BLOCKED THE RIVER.

...HYDROMETEOROLOGICAL CONDITIONS...

LOCALLY HEAVY RAIN FELL ACROSS PARTS OF SOUTHCENTRAL AND
SOUTHEAST ALASKA AGAIN ON FRIDAY. THE RAIN WAS ASSOCIATED WITH
A LONG SOUTHERLY FETCH OF WARM MOIST AIR THAT MOVED INTO THE
WESTERN GULF THURSDAY NIGHT AND CONTINUED EAST ACROSS THE
CENTRAL GULF ON FRIDAY. SOME STORM TOTALS ARE LISTED BELOW.
MOST OF THE RAIN OCCURRED IN LESS THAN AN 18 HOUR PERIOD AT
EACH LOCATION. WIDESPREAD SNOW ALSO OCCURRED ACROSS MUCH OF
THE WESTERN AND NORTHERN INTERIOR.


PRECIPITATION ENDING: 2008-10-11 18:00:00 FOR HR DURATION: 72

LOCATION NAME                 PE TS    72 HR (STORM TOTALS)
======== ====                 == ==

PATO     PORTAGE GLACIER      PP RZ :   7.65
UNRA2    UPPER NUKA RIVER     PC RG :   7.07
TRPA2    TWENTYMILE RIVER     PP RG :   6.23
KCKA2    KACHEMAK CREEK       PC RM :   6.10
GDWA2    GIRDWOOD FIRE STA    PC RG :   4.93
CBHA2    CORDOVA BOAT HARBOR  PC RZ :   4.75
RESA2    RESURRECTION RIVER   PC RG :   4.51
PAYA     YAKUTAT              PP RZ :   4.19
EYKA2    MT EYAK              PC RM :   4.00
PACV     CORDOVA              PP RZ :   3.64
PAWD     SEWARD               PP RZ :   3.20
SIKA2    SITKA CRN            PP RG :   2.83
PAJN     JUNEAU               PP RZ :   2.68
PATK     TALKEETNA            PP RZ :   2.09


ON SATURDAY THE FRONT THAT BROUGHT THE HEAVY RAIN TO ALASKA MOVED
EAST AND OUT OF THE AREA. A TROUGH REMAINED ACROSS THE WESTERN
MAINLAND WITH A LOW IN THE GULF NEAR KODIAK. THE LOW WILL SPREAD
RAIN BACK ACROSS THE KENAI PENINSULA AND PARTS OF SOUTHCENTRAL
SATURDAY NIGHT AND WILL KEEP MOST OF THE PANHANDLE WET THROUGH THE
WEEKEND.

THE NEXT FRONT WILL MOVE THROUGH THE BERING AND BEGIN TO SPREAD
PRECIPITION TO THE SOUTHWEST COAST ON MONDAY.


...FREEZING LEVELS...

ON SATURDAY MORNING FREEZING LEVELS WERE NEAR THE SURFACE OVER MOST
OF THE MAINLAND. LEVELS FROM KING SALMON EAST ACROSS SOUTHCENTRAL TO
YAKUTAT RANGED FROM 3000 FEET TO 5500 FEET. OVER THE NEXT FEW DAYS
FREEZING LEVELS OVER SOUTHCENTRAL WILL DROP TO NEAR THE SURFACE
WHILE LEVELS OVER THE PANHANDLE WILL DROP TO 2000 FEET.

....................................................................
THE DISCUSSION WILL BE ISSUED EVERY DAY THROUGH THE SUMMER.  A
GRAPHICAL VERSION OF THE HYDROMET DISCUSSION WITH CURRENT
PRECIPITATION AND WEATHER INFORMATION WILL BE UPDATED DAILY ON THE
APRFC WEB SITE.  HTTP://APRFC.ARH.NOAA.GOV/PRODUCTS/GHMD.PHP

$$
JEP