Flash Flood Warning 14, NWS Honolulu, HI

000
WGHW50 PHFO 041914
FFWHFO
HIC001-042215-
/O.EXT.PHFO.FF.W.0014.000000T0000Z-080204T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
911 AM HST MON FEB 4 2008

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE ISLAND OF HAWAII IN HAWAII COUNTY

* UNTIL 1215 PM HST

* AT 906 AM HST...RADAR SHOWED MODERATE TO HEAVY RAIN OVER 
  HAMAKUA...HILO...PUNA AND KAU DISTRICTS. THE AREA OF RAIN WAS 
  NEARLY STATIONARY. THERE ARE NO SIGNS THAT THE RAIN WILL DIMINISH 
  ANYTIME SOON.

* AT 910 AM HST...THE HONOLII STREAM GAGE CONTINUES TO SHOW THAT 
  STREAM REMAINS ABOVE FLOOD STAGE.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PEPEEKEO...PAPAIKOU...PAHOA...PAAUILO...OOKALA...LAUPAHOEHOE...
  KEAAU...KAPOHO...HONOMU...HAWAIIAN PARADISE PARK...HAWAIIAN
  BEACHES...HAKALAU...GLENWOOD AND MOUNTAIN VIEW.

THIS FLASH FLOOD WARNING REPLACES THE PRE-EXISTING WARNING THAT WAS
IN EFFECT FOR THE ISLAND OF HAWAII IN HAWAII COUNTY.

A FLASH FLOOD WARNING MEANS FLASH FLOODING IS IMMINENT OR OCCURRING
IN STREAMS...ROADS AND LOW LYING AREAS. MOVE TO HIGHER GROUND NOW.

RUNOFF FROM THIS STORM MAY ALSO CAUSE ROCK AND MUDSLIDES IN STEEP
TERRAIN.

DO NOT CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR ON FOOT.
TURN AROUND...DON/T DROWN.

THIS WARNING MAY NEED TO BE EXTENDED BEYOND 1215 PM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 1919 15521 1921 15530 1914 15541 1888 15565
      1900 15576 1958 15544 2011 15540 1978 15497
      1947 15475

$$
POWELL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 AM HST MON FEB 4 2008

.SYNOPSIS...
AN UPPER TROUGH WEST OF KAUAI WILL CONTINUE TO SUPPLY MOISTURE AND
PRODUCE UNSTABLE CONDITIONS OVER THE ISLANDS THROUGH TONIGHT... AND
TO A LESSER DEGREE TUESDAY. THE STRONG SURFACE HIGH FAR NORTHEAST
WILL CONTINUE PRODUCING MODERATE TRADE WINDS. WET CONDITIONS WILL
CONTINUE OVER THE EASTERN BIG ISLAND FOR AT LEAST ANOTHER DAY. THE
ATMOSPHERE WILL SLOWLY BECOME MORE STABLE BY WEDNESDAY.

&&

DISCUSSION...
THE UNSTABLE PATTERN PERSISTS WITH AN UPPER TROUGH ABOUT 200 MILES
WEST OF KAUAI. ALTHOUGH SHOWERS ARE NOT WIDESPREAD OVER THE MAIN
HAWAIIAN ISLANDS THEY WILL CONTINUE PRIMARILY OVER WINDWARD AND
MOUNTAIN AREAS DUE TO THE PRESENCE OF THE TRADE WIND FLOW IN THE
LOWER LAYERS OF THE ATMOSPHERE. AT TIMES THERE ARE HOWEVER HEAVY
SHOWERS OR ISOLATED THUNDERSTORMS WHICH IN MOST CASES PROGRESS
ACROSS THE ISLANDS WITHOUT REMAINING LONG ENOUGH OVER ONE AREA TO
CAUSE FLOODING PROBLEMS. THE FLOOD WATCH REMAINS IN EFFECT HOWEVER
SINCE THE HEAVY SHOWERS MAY REMAIN ANCHORED OVER SOME PARTICULAR
AREAS. KAUAI MAY AGAIN SEE THIS PROBLEM OCCUR.

A MORE SERIOUS PROBLEM IS THE PERSISTENT RAINFALL ON THE EASTERN BIG
ISLAND WHERE THERE IS MORE MOISTURE AVAILABLE IN THE DEEP SOUTHWEST
FLOW AND THE BENEFIT OF OROGRAPHIC ENHANCEMENT IN THE TRADE WIND
FLOW ON ON THE WINDWARD SIDE. THE SUBTROPICAL BRANCH OF THE JET
STREAM IS DIRECTING MOISTURE ONTO THE BIG ISLAND AND ALSO PROVIDING
LIFT DUE TO DIFFLUENCE IN THE UPPER ATMOSPHERE.

THE UPPER TROUGH PRODUCING THIS UNSETTLED WEATHER GOES THROUGH
SEVERAL CHANGES THIS WEEK. A PORTION OF THIS TROUGH LIFTS TO THE
NORTH THROUGH TUESDAY COMING TO REST ABOUT 600 MILES TO THE
NORTHEAST. THE SOUTHERN PORTION SINKS TO ABOUT 700 MILES TO THE
SOUTHWEST. ALL THE WHILE THE STRONG SURFACE HIGH FAR TO THE
NORTHEAST WILL MAINTAIN THE TRADES INTO THE SECOND HALF OF THE WEEK.
LINGERING COOL TEMPERATURES ALOFT IMPLY SOME INSTABILITY BUT THE
ORIENTATION OF THE TROUGH FARTHER TO THE SOUTH SHOULD NOT PRODUCE
THE GREAT INSTABILITY THAT PRESENTLY EXISTS.

FOR THE PERIOD OF FRIDAY THROUGH THE WEEKEND MODELS DISAGREE ON THE
STRENGTH OF THE TROUGH ASSOCIATED WITH AN EASTWARD MIGRATING LOW TO
THE NORTH. ADDITIONALLY THE GFS SEEMS TO BE TOO STRONG ON THE UPPER
LOW THAT REMAINS TO THE SOUTH OF THE ISLANDS. THEREFORE FORECAST
REFLECTS ONLY A GENERAL TRADE WIND PATTERN FOR NEXT WEEKEND.

WINTER WEATHER ADVISORY HAS BEEN EXTENDED THROUGH TODAY.

THE SMALL CRAFT ADVISORIES OVER THE WINDIER CHANNELS AND SOUTHEAST
OF THE BIG ISLAND WILL LIKELY BE EXTENDED THROUGH TUESDAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH UNTIL 600 PM HST TODAY FOR ALL ISLANDS.

HIGH SURF ADVISORY UNTIL 600 PM HST TODAY FOR EAST FACING SHORES OF
KAUAI OAHU MOLOKAI MAUI AND THE BIG ISLAND.

WINTER WEATHER ADVISORY UNTIL 600 PM HST TODAY FOR BIG ISLAND
SUMMITS.

SMALL CRAFT ADVISORY UNTIL 600 PM HST TODAY FOR MAALAEA BAY-SOUTH
BIG ISLAND WATERS-PAILOLO AND ALENUIHAHA CHANNELS.

&&

HOAG