Flash Flood Warning 62, NWS Honolulu, HI

386 
WGHW70 PHFO 101309
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
309 AM HST SUN NOV 10 2013

HIC009-101314-
/O.CAN.PHFO.FF.W.0062.000000T0000Z-131110T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MAUI HI-
309 AM HST SUN NOV 10 2013

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

WEATHER RADAR SHOWED THAT THE HEAVY RAINS HAVE ENDED...AND STREAM 
LEVEL HAS DROPPED BELOW FLOOD STAGE AT THE HALAWA STREAM GAGE. 
THEREFORE 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.

A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE ISLANDS OF KAUAI OAHU 
MOLOKAI LANAI AND MAUI UNTIL 6 AM HST TODAY.

LAT...LON 2124 15730 2124 15697 2118 15668 2103 15678
      2108 15733

$$

HUI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
830 PM HST SAT NOV 9 2013

.SYNOPSIS...
AN UPPER LEVEL TROUGH IS COMBINING WITH A MOIST UNSTABLE AIRMASS TO
KEEP POTENTIAL FOR HEAVY RAIN AND SLIGHT CHANCES FOR THUNDERSTORMS
ACROSS THE SMALLER ISLANDS THROUGH SUNDAY. A SHEAR LINE NORTH OF THE
AREA WILL ALSO MOVE SOUTH THROUGH SUNDAY NIGHT...BRINGING MORE
ENHANCED SHOWERS AND STRONGER NORTHEASTERLY WINDS. WINDS AND RAIN
WILL DIMINISH BY MID-WEEK...ALTHOUGH WE MAY SEE AN INCREASE IN
SHOWERS AGAIN LATE IN THE WEEK.

&&

.DISCUSSION...
AN UPPER LEVEL TROUGH AXIS MOVING ACROSS THE CENTRAL PORTIONS OF
THE ISLAND CHAIN REMAINS ORIENTED E TO W AND SLOWLY MIGRATING SE. A
STRONGER SHORTWAVE IS LOCATED AROUND 400 MILES N OF OAHU...PUSHING S
AT ABOUT 20 MPH. MEANWHILE...A SHEAR LINE IS LOCATED SOME 80 MILES N
OF KAUAI...WHILE A SECOND SFC BOUNDARY IS LOCATED ABOUT 380 MILES N
OF KAUAI. THE AIRMASS OVER THE AREA REMAINS RATHER UNSTABLE...AND
THE COMBINATION OF ALL THESE FEATURES WILL CONTINUE TO SUPPORT
PLENTY OF SHOWERS FROM KAUAI TO W MAUI THROUGH THE REST OF TONIGHT.

AT 8 PM HST...DATA FROM THE DOPPLER RADAR NETWORK WAS SHOWING
FREQUENT SHOWERS AFFECTING CENTRAL AND WINDWARD OAHU WITH PERIODS OF
HEAVY RAIN BRINGING POTENTIAL FOR FLASH FLOODING. LOCALIZED HEAVY
RAIN WAS ALSO BEING OBSERVED OVER INTERIOR KAUAI...SLOWLY PUSHING S
TOWARD KALAHEO AND PAKALA VILLAGE. A FLASH FLOOD WATCH REMAINS IN
EFFECT FOR THE SMALLER ISLANDS THROUGH 6 AM HST SUN. RAINFALL
ACCUMULATIONS RANGE FROM HALF AN INCH ON THE AVERAGE TO OVER 2
INCHES WITH THE HEAVIEST SHOWERS. ADDITIONAL LOCALIZED HEAVY RAIN IS
EXPECTED TONIGHT AND RESIDENTS IN AREAS PRONE TO FLOODING MUST
REMAIN VIGILANT AND WELL INFORMED WITH THE LATEST WARNINGS AND
ADVISORIES FROM YOUR NATIONAL WEATHER SERVICE IN HONOLULU BY
MONITORING THE NOAA WEATHER RADIO AND LOCAL MEDIA OUTLETS.

THE HEAVIER RAINFALL SHOULD REMAIN FOCUSED OVER WINDWARD SLOPES OF
THE SMALLER ISLANDS. ALSO...SATELLITE AND RADAR ANALYSES SUGGEST
ENHANCED COLD CLOUD TOPS HOVERING THE 15 TO 20 THOUSAND FEET RANGE.
THEREFORE...WILL CONTINUE TO CARRY A SLIGHT CHANCE OF THUNDERSTORMS
FOR ALL THE SMALLER ISLANDS AND MUCH OF THE COASTAL WATERS N OF THE
ISLANDS THROUGH SUN AFTERNOON. THE SHEAR LINE N OF KAUAI WILL MOVE
ACROSS THE STATE AND PROVIDE ENHANCED MOISTURE...REACHING MAUI
COUNTY BY SUN AND THE BIG ISLAND BY SUN NIGHT. ENHANCED SHOWERS
SHOULD LINGER AROUND THE BIG ISLAND THROUGH EARLY NEXT WEEK.

MEANWHILE...MODELS DEVELOP A STRONG SFC HIGH PRESSURE SYSTEM FAR NW
OF THE ISLANDS DURING THE NEXT COUPLE OF DAYS...WHICH BRINGS STRONG
AND GUSTY NE WINDS BEHIND THE SHEAR LINE. PRESSURE GRADIENTS WILL
BECOME TIGHT ENOUGH TO GENERATE BREEZY CONDITIONS ACROSS THE ALOHA
STATE ON SUN...AND POSSIBLY THROUGH MON MORNING.

FOR THE EXTENDED FORECAST...THERE IS A GENERAL CONSENSUS BETWEEN
THE GFS/ECMWF/CANADIAN/NAVGEM WITH RESPECT TO THE GENERAL PATTERN...
SHOWING A CUTOFF LOW DEVELOPING FAR NORTHEAST OF THE STATE AND
RETROGRADING WESTWARD AS ADDITIONAL ENERGY DIGS INTO THE BACKSIDE OF
THE LOW. HOWEVER...DIFFERENCES PERSIST WITH THE TIMING AND PLACEMENT
OF INDIVIDUAL FEATURES...SO THE EXTENDED WILL CONTINUE TO FEATURE
MORE OF A BROAD-BRUSHED PATTERN. BY MONDAY INTO TUESDAY...WINDS WILL
START TO WEAKEN AS THE LOW TO OUR NORTH NORTHEAST STRENGTHENS AND
SHIFTS THE RIDGE SOUTHWARD TOWARDS THE ISLANDS. A BRIEF PERIOD OF
DRIER LOW-LEVEL AIR IS EXPECTED EARLY TO MID WEEK BEHIND THE SHEAR
LINE. HOWEVER...BOTH THE GFS AND ECMWF SHOW A WEAK INVERTED TROUGH
DEVELOPING NEAR THE STATE LATE IN THE WEEK AS A NEW UPPER LEVEL
TROUGH DIGS DOWN TO OUR LATITUDE. THIS SYSTEM MAY BRING AN INCREASE
IN MOISTURE FROM THE SOUTHEAST...LEADING TO ANOTHER PERIOD OF WET
WEATHER LATE IN THE NEW WEEK.

&&

.AVIATION...
LOW LVL TURBULENCE IS EXPECTED EVERYWHERE TONIGHT...EXCEPT OVER THE
BIG ISLAND...ALONG WITH WIDESPREAD LOW CLOUDINESS...SHOWERS...AND
ISOLATED THUNDERSTORMS. ALL THIS ACTIVE WEATHER WILL BRING EXTENDED
PERIODS OF MVFR CONDITIONS OVER MUCH OF THE STATE...ESPECIALLY IN
WINDWARD AND MAUKA SECTIONS.  THE CONDITIONS WILL BE CONCENTRATED
OVER KAUAI AND OAHU...AND THEN GRADUALLY BECOME MORE PREVALENT OVER
MAUI COUNTY AS THE NIGHT PROGRESSES...AND LATER OVER THE BIG ISLAND.

AN AIRMET FOR MOUNTAIN OBSCURATION IS CURRENTLY IN EFFECT FOR ALL
ISLANDS EXCEPT THE BIG ISLAND...AND WILL LIKELY BE REISSUED AT
MIDNIGHT.

&&

.MARINE...
INCREASING TRADES ON SUN WILL BRING SMALL CRAFT ADVISORY CONDITIONS
ACROSS MUCH OF THE COASTAL WATERS. TRADE WIND SPEEDS MAY APPROACH
GALE FORCE OVER SOME PARTS OF THE COASTAL WATERS FROM SUN THROUGH
MON. EXPECT THE TRADES TO GRADUALLY TAPER OFF MON NIGHT INTO TUE.

INCREASING N AND NW SWELLS WILL PRODUCE LARGER SURF ALONG EXPOSED N
FACING SHORES OF MOST ISLANDS THROUGH THIS EVENING. A LARGE...
SHORT-PERIOD N/NE SWELL IS EXPECTED TO BUILD FROM TONIGHT THROUGH
SUN. THIS SWELL WILL LIKELY PRODUCE SURF HEIGHTS NEAR THE HIGH SURF
ADVISORY THRESHOLDS ALONG EXPOSED N AND E FACING SHORES OF THE
ISLANDS FROM SUN INTO MON...AND MAY ALSO CAUSE PROBLEMS WITH SURGES
IN N FACING HARBORS.

ANOTHER SIGNIFICANT N SWELL ARRIVING TUE NIGHT WILL LIKELY BUILD
WELL ABOVE THE HIGH SURF ADVISORY THRESHOLD ALONG N FACING SHORES ON
WED. IN FACT...SURF ALONG N FACING SHORES MAY APPROACH THE HIGH
SURF WARNING CRITERIA WED.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH UNTIL 6 AM HST SUNDAY FOR KAUAI-OAHU-MOLOKAI-
LANAI-MAUI.

HIGH SURF ADVISORY FROM MIDNIGHT TONIGHT TO 6 AM HST MONDAY FOR
NIIHAU-KAUAI WINDWARD-KAUAI LEEWARD-OAHU NORTH SHORE-OAHU KOOLAU-
OLOMANA-CENTRAL OAHU-MOLOKAI-MAUI WINDWARD WEST-MAUI CENTRAL
VALLEY-WINDWARD HALEAKALA-BIG ISLAND NORTH AND EAST.

SMALL CRAFT ADVISORY FROM MIDNIGHT TONIGHT TO 6 PM HST SUNDAY
FOR BIG ISLAND WINDWARD WATERS-BIG ISLAND LEEWARD WATERS.

SMALL CRAFT ADVISORY UNTIL 6 PM HST SUNDAY FOR KAUAI NORTHWEST
WATERS-KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-KAUAI CHANNEL-
OAHU WINDWARD WATERS-OAHU LEEWARD WATERS-KAIWI CHANNEL-MAUI
COUNTY WINDWARD WATERS-MAUI COUNTY LEEWARD WATERS-MAALAEA BAY-
PAILOLO CHANNEL-ALENUIHAHA CHANNEL-BIG ISLAND SOUTHEAST WATERS.

&&

DISCUSSION/MARINE...REYNES
AVIATION...KINEL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
1203 AM HST SUN NOV 10 2013

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

1130 PM     FLASH FLOOD      NIU VALLEY              21.29N 157.74W
11/09/2013                   HONOLULU           HI   MESONET

            NIU VALLEY RAIN GAGE REPORTED THREE QUARTERS OF AN INCH
            OF RAIN IN FIFTEEN MINUTES.

1130 PM     FLASH FLOOD      WAIMANALO               21.35N 157.73W
11/09/2013                   HONOLULU           HI   MESONET

            WAIMANALO RAIN GAGE REPORTED THREE QUARTERS OF AN INCH OF
            RAIN IN FIFTEEN MINTUES.

&&

NHUI

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
108 AM HST SUN NOV 10 2013

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

0100 AM     FLASH FLOOD      4 W KAHULUI             20.88N 156.52W
11/10/2013                   MAUI               HI   TRAINED SPOTTER

            RECEIVED 2 INCHES OF RAIN SINCE MIDNIGHT.

&&

NHUI