Flash Flood Warning 8, NWS Honolulu, HI

254 
WGHW70 PHFO 020021
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
221 PM HST TUE APR 1 2014

HIC001-020300-
/O.CON.PHFO.FF.W.0008.000000T0000Z-140402T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAWAII HI-
221 PM HST TUE APR 1 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF HAWAII
IN HAWAII COUNTY UNTIL 500 PM HST...

THE HEAVIEST RAINFALL IS OVER THE SLOPES ABOVE HILO WITH RATES AS 
HIGH AS 3 INCHES PER HOUR IN THE WAIAKEA UKA AREA. THIS RAINFALL IS 
OCCURRING ON SATURATED GROUND.  THERE WILL BE SIGNIFICANT RUNOFF 
INTO STREAMS ALREADY RUNNING HIGH FROM PREVIOUS RAINFALL. WAIAKEA 
STREAM...PALAI STREAM AND ALENAIO STREAM ARE EXPECTED TO HAVE RAPID 
RISES IN WATER LEVELS. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
PEPEEKEO...PAPAIKOU...HONOMU...HAKALAU...MOUNTAIN VIEW...GLENWOOD  
AND KEAAU.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 500 PM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 1979 15540 1995 15515 1974 15495 1947 15499
      1953 15532

$$

KODAMA

796 
WGHW70 PHFO 020157
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
357 PM HST TUE APR 1 2014

HIC001-020206-
/O.CAN.PHFO.FF.W.0008.000000T0000Z-140402T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAWAII HI-
357 PM HST TUE APR 1 2014

...THE FLASH FLOOD WARNING IS CANCELLED FOR THE ISLAND OF HAWAII IN
HAWAII COUNTY...

WEATHER RADAR AND RAIN GAGES SHOWED THAT THE HEAVY RAINS HAVE ENDED.

THE HEAVY RAINS AND FLOODING HAVE SUBSIDED...BUT RUNOFF IS STILL
OCCURRING AND STREAMS WILL REMAIN HIGH FOR SEVERAL HOURS.

LAT...LON 1979 15540 1995 15515 1974 15495 1947 15499
      1953 15532

$$

KODAMA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
950 AM HST TUE APR 1 2014

.SYNOPSIS...
TRADE WINDS WILL PREVAIL THROUGH THE WEEK...BECOMING BREEZY
WEDNESDAY...THEN DIMINISHING SATURDAY. ABUNDANT MOISTURE
ACROSS THE EASTERN PART OF THE STATE AND INSTABILITY FROM AN UPPER
TROUGH WILL CONTINUE WET WEATHER OVER THE WINDWARD BIG ISLAND AND
MAUI INTO WEDNESDAY. THERE IS ALSO A CHANCE FOR AFTERNOON THUNDERSTORMS
OVER THE LEEWARD SLOPES AND INTERIOR AREAS OF THE BIG ISLAND. A
DRIER WEATHER REGIME WILL PREVAIL FOR THE SECOND HALF OF THE WEEK
BEFORE SHOWERS PICK UP AGAIN OVER THE WEEKEND.

&&

.DISCUSSION...
MODERATE TO FRESH TRADE WINDS ARE PUSHING ENHANCED SHOWERS INTO
WINDWARD ISLAND SLOPES TODAY WITH SOME SHOWERS REACHING LEEWARD
LOCATIONS OF THE SMALLER ISLANDS. SHOWERS FOCUSED OVER THE
WINDWARD BIG ISLAND YESTERDAY AND OVERNIGHT WITH MANY AREAS
RECEIVING 6 INCHES OF RAIN IN THE PAST 24 HOURS. THESE MODERATE TO
LOCALLY HEAVY SHOWERS ARE EXPECTED TO CONTINUE INTO TONIGHT.

AN UPPER LEVEL SHORT WAVE DROPPING IN FROM THE NW WILL MAINTAIN
MODERATE ATMOSPHERIC INSTABILITY OVER THE ISLANDS... AND TRADE
SHOWERS NORMALLY CAPPED AT 6 TO 8 THOUSAND FEET ARE REACHING UP TO
25 THOUSAND FEET IN HEIGHT. LAND HEATING WILL BRING A SLIGHT
CHANCE OF THUNDERSTORMS TO THE LEEWARD SLOPES OF THE BIG
ISLAND THIS AFTERNOON... THOUGH THE CURRENT CLOUD COVER SHOULD
KEEP THUNDERSTORM ACTIVITY TO A MINIMUM. THE WINDWARD BIG ISLAND
WILL SEE ISOLATED THUNDERSTORMS THROUGH THE DAY.

THE SHORT WAVE WILL PASS NORTH OF THE ISLANDS TODAY AND THEN EXIT
NE OF THE STATE WEDNESDAY MORNING. TRADE SHOWERS WILL REMAIN ENHANCED
INTO WEDNESDAY MORNING UNTIL THE SHORT WAVE EXITS AND WEAK RIDGING
PUSHES OVER THE ISLANDS FROM THE WEST WEDNESDAY AFTERNOON.
WEDNESDAY NIGHT AND THURSDAY...SHOWER INTENSITY AND COVERAGE IS
EXPECTED TO DIMINISH AS THE UPPER RIDGING CAPS THE VERTICAL GROWTH
OF THE TRADE SHOWERS.

HIGH PRESSURE FAR NNE OF THE STATE IS PROVIDING MODERATE TO FRESH
TRADE WINDS ACROSS THE AREA TODAY. THE HIGH WILL DRIFT SLOWLY SOUTH
AS AN EASTWARD MOVING HIGH REINFORCES IT TODAY. AN UPTICK IN
TRADES IS EXPECTED TONIGHT AS THE N-S PRESSURE GRADIENT INCREASES
OVER THE ISLANDS. TRADES WILL REMAIN FRESH TO LOCALLY STRONG UNTIL
NEXT WEEKEND AS THE HIGH REMAINS IN PLACE. AN APPROACHING FRONT
WILL WEAKEN WINDS AND TURN THEM SE ON SATURDAY. THE FRONT LOOKS TO
BE FAIRLY WEAK AS IT MOVES THROUGH THE ISLANDS SATURDAY NIGHT AND
SUNDAY BRINGING ONLY BOUTS OF MODERATE RAINFALL. WINDS WILL TURN
NORTH BEHIND THE FRONT SUNDAY AND THEN NORTHEAST ON MONDAY. THE
AIRMASS BEHIND THE FRONT WILL BE COOLER AND DRIER...BRINGING A
NOTICEABLE DROP IN TEMPERATURES SUNDAY AND EARLY NEXT WEEK.

&&

.AVIATION...
ACTIVE SHOWERS ASSOCIATED WITH A TROUGH ALOFT NORTH OF THE AREA ARE
EXPECTED TO PERSIST THROUGH THIS EVENING. WIDESPREAD MVFR AND
LOCALIZED IFR CONDITIONS WILL CONTINUE OVER THE E SIDE OF THE BIG
ISLAND WITH OCCASIONAL MVFR OVER WINDWARD SIDES OF THE OTHER
ISLANDS. AIRMET SIERRA FOR MTN OBSC WILL LIKELY CONTINUE THROUGH THE
DAY TODAY AND PROBABLY LONGER. THUNDERSTORMS ARE EXPECTED TO DEVELOP
OVER THE BIG ISLAND SLOPES AGAIN THIS AFTERNOON.

&&

.MARINE...
A SMALL CRAFT ADVISORY IS IN AFFECT OVER THE WINDIER WATERS NEAR THE
BIG ISLAND AND MAUI. AN UPTICK IN WINDS AND EASTERLY WIND SWELL IS
EXPECTED TONIGHT AND THE ADVISORY WILL LIKELY BE EXPANDED.

A MODERATE NORTHWEST SWELL IS EXPECTED TO BUILD WEDNESDAY NIGHT AND PEAK
BELOW ADVISORY LEVELS THURSDAY. A STORM FORCE LOW EAST OF JAPAN
WILL GENERATE A WEST-NORTHWEST SWELL THAT WILL ARRIVE BY THE END
OF THE WEEK...WITH PEAK SURF HEIGHTS AT ADVISORY LEVELS ALONG
NORTH AND WEST FACING SHORES SATURDAY. A PULSE OF SWELL FROM THE
SOUTH IS ALSO EXPECTED FROM WEDNESDAY THROUGH FRIDAY.
STRENGTHENING TRADE WINDS WILL INCREASE WAVE ACTION ALONG EASTERN
SHORES TONIGHT THROUGH FRIDAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY UNTIL 6 PM HST THIS EVENING FOR BIG
ISLAND SUMMITS.

SMALL CRAFT ADVISORY UNTIL 6 PM HST WEDNESDAY FOR MAALAEA BAY-
PAILOLO CHANNEL-ALENUIHAHA CHANNEL-BIG ISLAND LEEWARD WATERS-BIG
ISLAND SOUTHEAST WATERS.

SMALL CRAFT ADVISORY FROM 6 PM THIS EVENING TO 6 PM HST
WEDNESDAY FOR KAUAI CHANNEL-KAIWI CHANNEL.

&&

MORRISON...DISCUSSION AND MARINE
DONALDSON...AVIATION