Flash Flood Warning 7, NWS Honolulu, HI

104 
WGHW70 PHFO 180811
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
1011 PM HST MON AUG 17 2015

HIC003-180915-
/O.CON.PHFO.FF.W.0007.000000T0000Z-150818T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HONOLULU HI-
1011 PM HST MON AUG 17 2015

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN
HONOLULU COUNTY UNTIL 1115 PM HST...

AT 920 PM HST EMERGENCY MANAGEMENT AND LAW ENFORCEMENT REPORTED 8 TO 
12 INCHES OF WATER COVERING KAMEHAMEHA HIGHWAY BY WAIKANE VALLEY 
ROAD. ADDITIONAL HEAVY RAIN IS STILL FALLING OVER THE KOOLAU 
MOUNTAINS NEAR WAIKANE AND WAIAHOLE.   

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WAIAHOLE...WAIKANE...PUNALUU...KAAAWA AND HAUULA.

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.

&&

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

THIS WARNING MAY NEED TO BE EXTENDED BEYOND 1115 PM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2160 15801 2164 15790 2153 15782 2143 15779
      2140 15788

$$


REYNES

087 
WGHW70 PHFO 180900
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
1100 PM HST MON AUG 17 2015

HIC003-180910-
/O.CAN.PHFO.FF.W.0007.000000T0000Z-150818T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HONOLULU HI-
1100 PM HST MON AUG 17 2015

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

WEATHER RADAR AND RAIN GAGES SHOWED THAT THE HEAVY RAINS HAVE ENDED.
THUS THE FLASH FLOOD WARNING IS CANCELLED.

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

LAT...LON 2160 15801 2164 15790 2153 15782 2143 15779
      2140 15788

$$

REYNES

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE HONOLULU HI
344 PM HST MON AUG 17 2015

.SYNOPSIS...
A TROUGH OF LOW PRESSURE NEAR THE ISLANDS WILL KEEP WINDS RATHER
LIGHT THE NEXT FEW DAYS. TROPICAL HUMIDITY AND DAYTIME SEA BREEZES
WILL GIVE WAY TO LOCALLY HEAVY AFTERNOON SHOWERS OR THUNDERSHOWERS.
THERE WILL ALSO BE THE POSSIBILITY FOR VOG OVER THE SMALLER
ISLANDS THROUGH THE MIDDLE PART OF THE WEEK. THE AIRMASS WILL
STABILIZE AND TRADE WINDS WILL RETURN LATE IN THE WEEK AS THE
TROUGH MOVES AWAY.

&&

.DISCUSSION...
AT THE SURFACE...A TROUGH IS LOCATED JUST W OF KAUAI AT MID-
AFTERNOON. ALOFT...AN UPPER LEVEL LOW IS LOCATED N OF THE ISLANDS
NEAR 30N 155W. THESE TWO FEATURES ARE INTERACTING WITH THE DEEP
TROPICAL MOISTURE /PW VALUES RANGING FROM 1.6 TO 1.9 INCHES/
OVER THE ISLANDS TO GENERATE LOCALLY HEAVY SHOWERS AND
THUNDERSHOWERS THIS AFTERNOON. AS DAYTIME HEATING FADES...SOME OF
THIS ACTIVITY WILL PROBABLY WEAKEN OVER LAND TONIGHT...BUT SHOULD
FLARE UP OVER THE COASTAL WATERS OVERNIGHT.

THE LOW LEVEL TROUGH WILL CRAWL VERY SLOWLY W TONIGHT AND TUE AS
THE UPPER LOW MOVES TO THE SW. THIS WILL BRING THE UPPER LOW A
LITTLE CLOSER TO THE ISLANDS...WITH SLIGHTLY COOLER AIR IN THE MID
LEVELS LEADING TO A MORE UNSTABLE AIRMASS ON TUE. EXPECTING
ANOTHER ACTIVE CONVECTIVE DAY ON TUESDAY AS ANY MORNING SUNSHINE
WILL PROVIDE THE HEATING AND SEA BREEZES FOR SHOWERS AND
THUNDERSHOWERS TO BLOW UP OVER THE INTERIORS BY THE AFTERNOON.

ADDITIONAL SHOWERS OR THUNDERSHOWERS COULD DEVELOP S OF THE
SMALLER ISLANDS IN A ZONE OF LOW LEVEL CONVERGENCE TUE NIGHT OR
WED AS THE LOW LEVEL FLOW TURNS UNSEASONABLY SE OR EVEN S AND
STRENGTHENS SLIGHTLY...AND THIS IS SUGGESTED BY SOME OF THE HIGH
RESOLUTION GUIDANCE. SOME OF THIS ACTIVITY COULD GET CARRIED NEAR
OR OVER THE WESTERN MAIN ISLANDS DURING THIS TIME. IF THERE IS ANY
SUNSHINE ON WED...AFTERNOON CONVECTION COULD DEVELOP ONCE AGAIN.
IN THIS LOW LEVEL FLOW...ANY IN-SITU ACTIVITY DEVELOPING OVER THE
ISLANDS WOULD TEND TO FAVOR THE INTERIOR AND NORTH SHORES.

BOTH THE UPPER LOW AND THE LOW LEVEL TROUGH WILL MOVE AWAY FROM
THE ISLANDS BY THU...AND MID LEVEL RIDGING AND WARMER AIR WILL
BUILD IN ALOFT. THE AIRMASS WILL REMAIN QUITE MOIST AND LOW LEVEL
FLOW WILL REMAIN LIGHT SE...SO AFTERNOON CONVECTION IS STILL
LIKELY EVEN ON THU ALTHOUGH PERHAPS NOT QUITE AS VIGOROUS.

THE LOW LEVEL FLOW WILL FINALLY START TO TURN BACK TOWARD EASTERLY
TRADES AND STRENGTHEN BY FRIDAY...AND THE AIRMASS MIGHT TEMPORARILY
DRY OUT A LITTLE...BUT THE GUIDANCE REMAINS LESS THAN OPTIMISTIC
ABOUT ANY SIGNIFICANT DRYING TREND.

THE COMPUTER MODELS CONTINUE TO DEVELOP A TROPICAL CYCLONE IN THE
MONSOON TROUGH FAR TO THE SE OF THE ISLANDS. SEE TROPICAL WEATHER
OUTLOOKS FROM THE CENTRAL PACIFIC HURRICANE CENTER FOR THE LATEST
ON THIS DISTURBANCE. THEY GENERALLY WANT TO TAKE WHATEVER DEVELOPS
WITHIN THE MONSOON TROUGH OFF TO THE NW...SHOWING WIDELY VARYING
SOLUTIONS WITH VASTLY DIFFERENT IMPACTS TO THE STATE DEPENDING ON
WHICH OF THE SOLUTIONS WERE TO VERIFY. BY THE WEEKEND...THERE IS A
STILL A SPREAD OF OVER 500 MILES OR SO AMONG THE VARIOUS MODELS IN
WHERE THIS FUTURE SYSTEM WOULD BE IF IT DEVELOPS...SO IT IS TOO
SOON TO SAY WITH ANY CERTAINTY IF THIS FEATURE WOULD HAVE ANY
EFFECTS ON OUR WEATHER. STAY TUNED.

&&

.AVIATION...
A TROUGH OF LOW PRESSURE WILL REMAIN IN PLACE OVER THE ISLANDS
TONIGHT AND TUE. THIS WILL KEEP A LIGHT WIND REGIME IN
PLACE...WITH DAYTIME SEA BREEZES AND OVERNIGHT LAND BREEZES
EXPECTED IN MOST AREAS. MOST SHRA AND ISOLATED TSRA ARE EXPECTED
TO END THIS EVENING OVER THE ISLANDS...WITH VFR CONDITIONS
PREVAILING OVERNIGHT. QUITE A BIT OF SHOWER ACTIVITY IS EXPECTED TO
DEVELOP AGAIN TUESDAY BY MID TO LATE MORNING...WITH ISOLATED
TS POSSIBLE AS WELL.

NO AIRMETS ARE CURRENTLY IN EFFECT.

&&

.MARINE...
WITH WINDS REMAINING LIGHT...RELATIVELY QUIET MARINE CONDITIONS
ARE EXPECTED FOR THE NEXT SEVERAL DAYS. THE GUIDANCE ALSO DOES NOT
SHOW ANY SIGNIFICANT SWELLS. THERE MAY BE SOME HEAVIER SHOWERS OR
THUNDERSHOWERS OVER SOME OF THE COASTAL WATERS ZONES STARTING
TONIGHT...AND CONTINUING THROUGH WED.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

DISCUSSION/MARINE...R BALLARD
AVIATION...JELSEMA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
818 PM HST MON AUG 17 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0758 PM     HEAVY RAIN       WAILUA                  22.06N 159.34W
08/17/2015  E0.00 INCH       KAUAI              HI   LAW ENFORCEMENT

            MAUI PD DISPATCH REPORTED SMALL DEBRIS/ROCKS FOR ROAD TO
            HANA. NO CLOSURES.

0758 PM     FLOOD            KAWAIHAE                20.04N 155.83W
08/17/2015                   HAWAII             HI   EMERGENCY MNGR

            HAWAII CIVIL DEFENSE REPORTED 4 INCHES OF WATER ON ROAD
            THAT IS PUUKOHOLA/KAWAIHAE ROAD. ALSO MAUNA KEA APT WERE
            FLOODED AT QUEEN KAAHUMANU/KAWAIHAE WITH THE RESIDENTS
            BEING EVACUATED.

0758 PM     FLOOD            KAWAIHAE                20.04N 155.83W
08/17/2015                   HAWAII             HI   EMERGENCY MNGR

            HAWAII CIVIL DEFENSE REPORTED ROUTE 270 MILE MARKER 0 HAD
            WATER ON ROAD.

0758 PM     FLOOD            KAUPO                   20.64N 156.12W
08/17/2015                   MAUI               HI   LAW ENFORCEMENT

            MAUI PD DISPATCH REPORTED NUU MILE MARKER 29 HAD WATER
            OVER THE ROAD AND WAS THUS CLOSED.

&&

ITUU