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 13 14 15
172
AGAK78 PACR 252342
HMDACR

HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT MON SEP 25 2017

...FLOOD POTENTIAL...

THE RELEASE FROM SNOW GLACIER DAMMED LAKE HAS REACHED ITS PEAK AND
IS NOW FALLING. WATER LEVELS REMAIN ELEVATED FROM THE HEAVY RAIN
THAT FELL ON THE EASTERN KENAI PENINSULA ON SUNDAY. WATER LEVELS
WILL CONTINUE TO FLOOD THE ROAD TO PRIMROSE CAMPGROUND AND OTHER LOW
LYING AREAS UNTIL WATER HAS BEEN ALLOWED TO DRAIN. WATER LEVELS ON
THE KENAI RIVER BELOW SKILAK LAKE WILL LIKELY SEE INCREASED WATER
LEVELS TO NEAR BANKFULL CONDITIONS THROUGH EARLY THIS WEEK. PLEASE
REFER TO THE LATEST FLOOD STATEMENT THAT HAS BEEN ISSUED FOR THIS
EVENT.

...HYDROMETEOROLOGICAL DISCUSSION....

A LOW OVER THE ARCTIC AND A LOW IN THE BRISTOL BAY REGION AS WELL AS
A RIDGE AXIS POKING INTO THE SOUTHEAST WAS AFFECTING THE STATE. WITH
THE MOVEMENT OF THE BRISTOL BAY LOW TO THE SOUTHWEST ALONG THE
ALASKA PENINSULA A SHORT WAVE WILL BE BROUGHT UP INTO THE GULF
DURING THE NEXT 24 HOURS. STRONG SOUTHWEST FLOW ALONG WITH MODEL
DYNAMICS DRIVES HEAVY RAIN FIRST INTO THE SOUTHERN REACHES WITH THE
PASSAGE OF A FRONTAL BAND THAT SWINGS THROUGH THE REST OF THE
PANHANDLE. THIS IS FOLLOWED DIRECTLY WITH A FETCH OF MOISTURE THAT
EXTENDS DOWN INTO THE SUBTROPICS HELPING TO EXTEND THE HEAVY RAIN
WEDNESDAY INTO THURSDAY.

THE HIGHEST RAINFALL TOTALS BY TUESDAY MORNING WILL RANGE AROUND AN
INCH OVER THE SOUTHERN END OF THE PANHANDLE. BY WEDNESDAY MORNING
VALUES PICKUP AND SPREAD WITH AMOUNTS NEARING BETWEEN 2 AND 3 INCHES
OVER THE CENTRAL AND SOUTHERN PANHANDLE. STORM TOTAL VALUES
GENERALLY FROM TUESDAY THROUGH THURSDAY COULD RANGE BETWEEN 5 AND 8
INCHES AND FOCUSED OVER EASTERN CHICHAGOF ISLAND... FAIRWEATHER
RANGE AND ADMIRALTY ISLAND.

...PRECIPITATION...

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

LOCATION NAME                 PE TS   24 HR
======== ====                 == ==   =====
EYKA2    MT EYAK              PC RM :   2.20
SPPA2    SNETTISHAM POWER PLA PP RZ :   1.87
TTKA2    TATITLEK             PC RM :   1.70
PATO     PORTAGE GLACIER      PP RZ :   1.66
KDVA2    CORDOVA CRN          PC RG :   1.65
HYDA2    HYDER                PP RZ :   1.35
PACV     CORDOVA              PP RZ :   1.34
KPHA2    KETCHIKAN POWERHOUSE PP RZ :   1.22
SRFA2    STRAWBERRY REEF      PC RM :   1.20
KTNA2    BEAVER FALLS POWERHO PP RZ :   1.18
SLVA2    SILVIS POWERHOUSE    PP RZ :   1.17
WLDA2    WHITMAN LAKE DAM     PP RZ :   1.13
PPSA2    POWDER PATCH STATION PC RZ :   1.03
LLKA2    LONG LAKE SNOTEL     PC RM :   1.00
ESIA2    ESTHER ISLAND        PC RM :   1.00
GAHA2    GLEN ALPS HANDAR     PP RG :   0.96
PAKT     KETCHIKAN AIRPORT    PP RZ :   0.92
YESA2    MOUNT ALYESKA SNOTEL PC R2 :   0.90
SAWA2    SPEEL ARM STATION 4- PC RZ :   0.90
META2    AK METLAKATLA 6S     PC R4 :   0.89
PANT     ANNETTE AIRPORT      PP RZ :   0.84
SRYA2    SITUK RIVER NR YAKUT PP RG :   0.83
NUKA2    NUKA GLACIER SNOTEL  PC RM :   0.80
BPWA2    BAILEY POWERHOUSE    PP RZ :   0.80
SHLA2    SHELTER COVE RAWS    PC RG :   0.77
ECEA2    EAGLECREST TOP CWOP  PP RZ :   0.76
SHLA2    SHELTER COVE RAWS    PP RG :   0.71
YESA2    MOUNT ALYESKA SNOTEL PC RM :   0.70
TMLA2    TWELVE MILE LAKE     PC RP :   0.70
NUCA2    NUCHEK               PC RM :   0.70
JTMA2    MT ROBERTS TRAM      PC RZ :   0.70
DCSA2    DAVIES CREEK SNOTEL  PC RM :   0.70
YUTA2    YAKUTAT 3 SSE CRN    PC R4 :   0.69
FOJA2    FOURTH OF JULY CREEK PC RP :   0.69
MNDA2    MENDENHALL LAKE LEVE PP RG :   0.64
AYBA2    ALYESKA WEATHER BASE PP RG :   0.64
MHPA2    MITKOF HWY PETERSBUR PP RZ :   0.63
PAMM     METLAKATLA           PP RZ :   0.62
PSJA2    PORT SAN JUAN        PC RM :   0.60
EXGA2    EXIT GLACIER         PC RM :   0.60
ETBA2    EAGLECREST PTARMIGAN PP RZ :   0.60
DBWA2    DRY BAY GLACIER BAY  PP RG :   0.60

...LONG RANGE...

THE 6 TO 10 DAY TEMPERATURE OUTLOOK HAS SLIGHTL TILTS TOWARDS
INCREASED PROBABILITIES OF ABOVE NORMAL TEMPERATURES OVER THE
WESTERN HALF OF THE MAINLAND AND SOUTHEAST.

THE 6 TO 10 DAY PRECIPITATION OUTLOOK HAS NEAR NORMAL PRECIPITATION
OVER THE EASTERN HALF OF THE MAINLAND.

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



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