Flash Flood Warning 56, NWS Honolulu, HI

770 
WGHW70 PHFO 170725
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
925 PM HST FRI OCT 16 2015

HIC009-170900-
/O.CON.PHFO.FF.W.0056.000000T0000Z-151017T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MAUI HI-
925 PM HST FRI OCT 16 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM HST FOR
THE ISLAND OF MAUI IN MAUI COUNTY...

AT 921 PM HST...LANDSLIDES WERE REPORTED ALONG PARTS OF THE HANA HIGHWAY 
ALONG THE WINDWARD MAUI COAST. HOWEVER...NO ROAD CLOSURES WERE REPORTED.
STREAM GAGES SHOW WATER LEVELS ARE STARTING TO DROP...BUT MANY STREAMS
REMAIN ELEVATED DUE TO EARLIER HEAVY RAINFALL.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO...
PUKALANI...HALIIMAILE...PAUWELA...WAIKAPU...WAILUKU AND HAIKU-PAUWELA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT 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 1100 PM HST IF HEAVY RAIN
PERSISTS.

LAT...LON 2065 15607 2076 15624 2086 15646 2081 15661
      2084 15665 2097 15669 2104 15660 2102 15656
      2090 15648 2095 15633 2094 15625 2082 15611
      2080 15601 2073 15599

$$

HOUSTON

818 
WGHW70 PHFO 170810
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
1010 PM HST FRI OCT 16 2015

HIC009-170819-
/O.CAN.PHFO.FF.W.0056.000000T0000Z-151017T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MAUI HI-
1010 PM HST FRI OCT 16 2015

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

WEATHER RADAR SHOWED HEAVY RAIN HAS ENDED. THEREFORE...THE FLASH FLOOD 
WARNING IS CANCELLED.

LAT...LON 2065 15607 2076 15624 2086 15646 2081 15661
      2084 15665 2097 15669 2104 15660 2102 15656
      2090 15648 2095 15633 2094 15625 2082 15611
      2080 15601 2073 15599

$$

HOUSTON

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HONOLULU HI
511 PM HST FRI OCT 16 2015

.UPDATE...
ADDED SCATTERED THUNDERSTORMS TO THE BIG ISLAND THROUGH THE
EVENING GIVEN CURRENT RADAR TRENDS AND LIGHTNING OBSERVATIONS.

&&

.SYNOPSIS...
MODERATE TRADE WINDS WILL PERSIST INTO NEXT WEEK AS HIGH PRESSURE
REMAINS NORTH OF THE ISLANDS. TROPICAL MOISTURE FROM FORMER
TROPICAL CYCLONE NORA AND AN OLD FRONT WILL SPREAD ACROSS THE
ISLAND CHAIN THROUGH THE WEEKEND...RESULTING IN A WET TRADE WIND
PATTERN. THIS MOISTURE WILL PASS WEST OF THE ISLANDS BY MONDAY
WITH DRIER CONDITIONS EXPECTED DURING THE FIRST PART OF NEXT WEEK.

&&

.PREV DISCUSSION.../ISSUED 410 PM HST FRI OCT 16 2015/

SATELLITE AND RADAR ACROSS HAWAII SHOW PLENTY OF CLOUDS AND
SHOWERS PASSING OVER THE WINDWARD AND MAUKA PORTIONS OF OAHU TO
THE BIG ISLAND. THIS MOISTURE IS ASSOCIATED WITH FORMER TROPICAL
CYCLONE NORA AND A DISSIPATED FRONT THAT IS BEING DIRECTED OVER
THE STATE BY THE MODERATE TRADE WINDS.

ALOFT...A WEAK LOW IS POSITIONED WEST OF KAUAI THIS AFTERNOON AND IS
HELPING TO ENHANCE SOME OF THE SHOWERS. SOME SHOWERS HAVE BEEN LOCALLY
HEAVY AND THE BIG ISLAND HAS BEEN SEEING A FEW THUNDERSTORMS THIS
AFTERNOON. AFTERNOON SOUNDINGS...NOT SURPRISINGLY...SHOW AN
UNSTABLE ATMOSPHERIC PROFILE AT HILO WHILE A WEAK 5000 FOOT
INVERSION IS PRESENT AT LIHUE.

EXPECT THESE SHOWERS TO CONTINUE MAINLY FOR THE WINDWARD PORTIONS
OF OAHU...MOLOKAI...MAUI AND THE BIG ISLAND. SOME OF THESE
SHOWERS WILL BE LOCALLY HEAVY DUE TO THE INSTABILITY CAUSED BY THE
UPPER TROUGH. INTERMITTENT PASSING SHOWERS WILL LIKELY IMPACT THE
LEEWARD SIDES OF THE SMALLER ISLANDS...BUT SHOULD SHOWERS SHOULD
BE MAINLY WINDWARD FOCUSED. A SLIGHT CHANCE

THIS MOISTURE WILL LINGER ACROSS THE STATE WITH MODERATE TRADE
WINDS THIS WEEKEND...THUS EXPECT TO SEE A CONTINUATION OF THE
HIGHER THAN NORMAL CHANCES FOR RAIN...WITH A GRADUAL SHIFT OF THE
RAIN TO THE WESTERN END OF THE STATE NOW THROUGH SUNDAY. HEAVY
RAIN IS EXPECTED AT TIMES THROUGH SATURDAY...MAINLY FOR THE
WINDWARD AND MAUKA AREAS. A SLIGHT CHANCE OF THUNDERSTORMS IS ALSO
IN THE FORECAST FOR THE BIG ISLAND SATURDAY AFTERNOON.

THE MOISTURE SHOULD MOVE WEST OF THE STATE BY MONDAY AND WE WILL
RETURN TO A DRIER AND MORE STABLE WEATHER PATTERN THROUGH MUCH OF
NEXT WEEK. A NEW HIGH WILL EMERGE AND PASS NORTH OF THE ISLANDS
NEXT WEEK WEDNESDAY...RESULTING IN STRENGTHENING TRADE WINDS.

THE SOUTH BIG ISLAND UNIT WITH THE CALL SIGN PHWA/HWC...IS DOWN
DUE TO A HARDWARE ISSUE WHERE THE RADAR WILL NOT BE FIXED UNTIL
SOMETIME NEXT WEEK.

&&

.AVIATION...
MOISTURE EMBEDDED IN THE TRADES COMBINED WITH AN UPPER LOW W OF THE
AREA IS PRODUCING SCATTERED SHOWERS OVER WINDWARD AND MAUKA AREAS
WITH A FEW SHOWERS ALSO SEEN OVER THE LEEWARD SLOPES OF THE BIG
ISLAND. A FEW THUNDERSTORMS CAN BE EXPECTED OVER THE BIG ISLAND
SLOPES THROUGH THIS EVENING. MVFR CONDITIONS WILL PREVAIL OVER
MOST WINDWARD AND MAUKA AREAS OVERNIGHT DUE TO LOW CLOUDS AND
SHRA.

&&

.MARINE...
A LONG PERIOD SOUTH SWELL WILL MAINTAIN TONIGHT ACROSS THE STATE
RESULTING IN SURF HEIGHTS REACHING ADVISORY LEVELS. A HIGH SURF
ADVISORY IS NOW IN EFFECT FOR SOUTH FACING SHORES OF ALL ISLANDS
THROUGH SATURDAY NIGHT...WITH THE SWELL EXPECTED TO DECLINE
AFTERWARD. ANOTHER LONG PERIOD SOUTH SWELL WILL ARRIVE IN THE
ISLANDS EARLY THURSDAY MORNING NEXT WEEK.

A MODERATE SHORT-PERIOD SWELL FROM THE NORTH WILL GRADUALLY LOWER
THROUGH THE WEEKEND. A SLIGHTLY SMALLER NORTHWEST SWELL WILL ARRIVE
DURING THE MIDDLE OF NEXT WEEK...PEAKING WEDNESDAY AND THEN
LOWERING TOWARDS THE END OF THE WEEK.

A SMALL CRAFT ADVISORY CONTINUES FOR THE ALENUIHAHA...PAILOLO
CHANNELS AND MAALAEA BAY THROUGH TONIGHT DUE TO TRADE WINDS
ACCELERATING THROUGH THE TERRAIN SURROUNDING THESE AREAS. THE SCA
IS EXPECTED TO BE DROPPED IN THE MORNING. THE BACKGROUND FLOW
SHOULD BE NEARLY THE SAME OVER THE NEXT SEVERAL DAYS AND SOME
ZONES MAY REMAIN BORDERLINE SCA CONDITIONS...THUS POSSIBLE WE MAY
ISSUE AN SCA FOR WINDS DURING THE NEXT WEEK IF OBSERVATIONS AND
ASCAT SHOW EVIDENCE OF TEMPORARY STRONGER WINDS.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY UNTIL 6 AM HST SUNDAY FOR SOUTH FACING SHORES
OF NIIHAU KAUAI OAHU MOLOKAI LANAI KAHOOLAWE MAUI AND BIG ISLAND.

SMALL CRAFT ADVISORY UNTIL 6 AM HST SATURDAY FOR MAALAEA BAY-
PAILOLO CHANNEL-ALENUIHAHA CHANNEL.

&&

UPDATE/DISCUSSION/MARINE...FOSTER
AVIATION...BURKE