Hydrometeorological Discussion
Issued by NWS Alaska-Pacific RFC

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12
000
AGAK78 PACR 212127
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
130 PM AKDT SUN SEP 21 2014

...FLOOD POTENTIAL...

WATER LEVELS IN THE UPPER AND MIDDLE KENAI RIVER REMAIN ELEVATION
FROM ALL THE RAIN THAT FELL LAST WEEK. COOPER LANDING... KENAI KEYS
AND SKILAK LAKE WILL ALL FALL BELOW ACTION STAGE BY EARLY THIS WEEK.
THE WESTERN SUSITNA BASIN HAS ALSO EXPERIENCED SOME ELEVATED STAGES
AS WELL AND WITH THE DRY WEATHER FORECAST WATER LEVELS WILL FALL
UNBATED.

SOUTHEAST ALASKA HAS BEEN THE FOCUS OF HEAVY RAIN DURING THE LAST
COUPLE OF DAYS. OVER THE LAST THREE DAYS SEVERAL LOCATIONS HAVE
REPORTED BETWEEN 5 AND 7 INCHES OF RAIN. THE GOOD NEWS IS THAT EVEN
WITH ALL THIS RAINFALL WATER LEVELS ON SEVERAL RIVERS AND STREAM
HAVE RISEN TO ELEVATIONS BELOW ACTION STAGE.

FLOOD POTENTIAL IS LOW OVER THE REST OF THE STATE.

...HYDROMETEOROLOGICAL DISCUSSION...

THE MAJOR FEATURE FOR WHICH TO BE CONCONERNED ABOUT WILL BE THE
TRANSITION OF A SIGNIFICANT SHORTWAVE THROUGH THE NORTHERN SOUTHEAST
SUNDAY AFTERNOON/EVENING. THE ASSOCIATED BAROCLONIC LEAF INDICATION
STRENGTHEN CYCLONIC CIRCULATION WAS EVIDENT IN THE NORTHEAST GULF ON
THE DOWNSTREAM SIDE OF THE PERSISTANT LONG-WAVE THAT REMAINS OVER
THE STATE. THE HEAVY RAIN OVER THE SOUTHERN SOUTHEAST ON SATURDAY
SLIDES NORTH THROUGH THE DAY IN RESPONSE.

IN THE MEANTIME... A WAVE OF ENERGY IN CENTRAL ALASKA WHICH PRODUCED
SURPRISING RAINFALL AMOUNTS OF NEARLY AN INCH ON SATURDAY CONTINUES
ITS PROGRESSION EAST AS THE RIDGE OVER THE WEST EDGES EAST.

THIS MORNINGS FREEZING LEVELS RANGED BETWEEN 1700 FT AT KOTZEBUE TO
JUST OVER 4600 FT AT ANCHORAGE. ACROSS THE NORTH SLOPE HEIGHTS WERE
AT THE SURFACE. IN THE COASTAL AREAS A DRAMATIC GRADIANT SET UP WITH
ANNETTE REPORTING LEVELS ABOVE 11000 FT WHILE YAKUTAT WAS NEAR 6100
FT.

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

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
HADA2    HAIDA RAWS           PC RG :   3.19
LLKA2    LONG LAKE SNOTEL     PC RM :   2.80
ZMBA2    ZAREMBO ISLAND SOUTH PC RG :   2.63
SHLA2    SHELTER COVE RAWS    PC RG :   2.60
SOUA2    SOULE RIVER NEAR HYD PP RG :   2.50
PAKW     KLAWOCK              PP RZ :   2.23
THOA2    THORNE BAY RAWS      PC RG :   2.03
PAKT     KETCHIKAN            PP RZ :   1.45
KKEA2    KAKE RAWS            PC RG :   1.43
PAPG     PETERSBURG           PP RZ :   1.03
SDIA2    SOUTH DOUGLAS        PC RZ :   1.00
PAJK     JUNEAU WFO           PP RZ :   0.99
PAOH     HOONAH               PP RZ :   0.87
LCRA2    LITTLE CHENA RIDGE S PP RG :   0.87
MCAA2    MONTANA CREEK AT BAC PC RG :   0.86
PAJN     JUNEAU               PP RZ :   0.85
CHTA2    CHATANIKA RAWS       PC RG :   0.85
HONA2    HOONAH RAWS          PC RG :   0.82
BLTA2    BARTLETT COVE        PC RG :   0.80
AUKA2    AUKE BAY LARC        PC RP :   0.80
WICA2    WICKERSHAM DOME NEAR PP RG :   0.78
FNEA2    FAIRBANKS NE CRN     PP RZ :   0.76
ALSQ9    ALSEK RIVER ABOVE BA PP RG :   0.75
UNCA2    UPPER NOME CREEK     PC RM :   0.70
MREA2    MOORE CREEK BRIDGE   PC RM :   0.70
GSTA2    GLACIER BAY NATIONAL PP RZ :   0.67
WONA2    WONDER LAKE RAWS     PP RG :   0.66

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS INCREASED CHANCES OF ABOVE
NORMAL TEMPERATURES OVER THE AKPEN... EXTREME WESTERN PORTION
OF THE MAINLAND... NORTH GULF AND THE PANHANDLE.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS INCREASED CHANCES FOR
ABOVE NORMAL PRECIPITATION OVER THE PANHANDLE.

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

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

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


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.