Flash Flood Warning 1, NWS Honolulu, HI

Issued

Apr 10, 2003, 4:10 PM HST (02:10 UTC)

Expired

Apr 10, 2003, 7:00 PM HST

In force

3 hr

Issued by

NWS Honolulu, HI

Area

Whole counties

County Kauai County, HI

000 
WGHW50 PHFO 110216
FFWHI 
HIZ003-110510-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
410 PM HST THU APR 10 2003

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WINDWARD MAUI FROM KIPAHULU TO HANA AND TO HAIKU
	 
* UNTIL 7 PM HST

* AT 410 PM HST...STRONG THUNDERSTORMS WERE OCCURING ALONG THE HANA 
  COAST.

FLASH FLOODING IS EXPECTED IN NORMALLY DRY STREAMBEDS DURING THE 
NEXT THREE HOURS. PERSONS IN LOW-LYING OR FLOOD PRONE AREAS SHOULD 
MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. 
PERSON ON MAUI SHOULD TAKE IMMEDIATE ACTION TO PROTECT LIFE AND 
PROPERTY AND SEEK HIGHER GROUND OR REMAIN INDOORS.

MOTORISTS SHOULD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO 
CROSS FAST FLOWING OR RISING WATER...MANY FLASH FLOOD DEATHS OCCUR 
WHEN MOTORISTS TRY TO CROSS FLOODED ROADWAYS. ESCAPE RISING WATER BY 
CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY TO OUTRUN A FLOOD 
EITHER ON FOOT OR IN YOUR VEHICLE. DO NOT CAMP NEAR STREAMS OR OTHER 
AREAS SUBJECT TO FLOODING.

STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV OR RADIO FOR FURTHER 
NATIONAL WEATHER SERVICE INFORMATION.
 
$$
CRAIG

NWS Honolulu, HI wrote its last area forecast discussion before this flash flood warning went out at Apr 10, 4:00 PM HST, 10 minutes earlier.

HAWAIIAN ISLANDS SYNOPTIC DISCUSSION AND GUIDANCE
NATIONAL WEATHER SERVICE HONOLULU HI
4 PM HST THU APR 10 2003

SUMMARY...A RELATIVELY UNSTABLE ATMOSPHERE WILL KEEP THE CHANCE FOR
ISOLATED THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY. HIGH
PRESSURE PASSING BY TO THE NORTH WILL BOOST THE TRADE WINDS THIS
WEEKEND. THE HIGH WILL ALSO PUSH A SHEARLINE SOUTHWARD...BRINGING
SHOWERS TO THE STATE FRIDAY AND SATURDAY.

DISCUSSION...WATER VAPOR SATELLITE IMAGERY SHOWS A SMALL UPPER LEVEL
LOW CENTERED OVER MAUI AND THE BIG ISLAND. COOL TEMPERATURES ALOFT
ASSOCIATED WITH THE LOW...ALONG WITH AFTERNOON HEATING...HAVE SET
OFF THUNDERSTORMS OVER MAUI AND THE BIG ISLAND. THE THUNDERSTORMS
WILL LIKELY FORM AND DISSIPATE INTO THE EVENING.

THE DEPARTURE OF THE LOW TO THE EAST DOES NOT MEAN THAT THE CHANCE
OF THUNDERSTORMS WILL BE OVER WITH HOWEVER. THIS IS BECAUSE THE LOW
IS SITUATED IN A TROPICAL UPPER TROPOSPHERIC TROUGH (TUTT) WHICH IS
EXPECTED TO KEEP THE AIRMASS OVER THE ISLANDS UNSTABLE THROUGH
SATURDAY.

A SURFACE HIGH MOVING EAST ALONG 35N WILL BOOST THE TRADE WINDS AS
IT PASSES NORTH OF THE ISLANDS. THE HIGH WILL ALSO PUSH AN OLD
SHEARLINE SOUTH OVER THE ISLANDS. THE SHEARLINE WILL SUPPLY THE
MOISTURE AND COOL TEMPERATURES WITH THE TUTT WILL SUPPLY THE
INSTABILITY REQUIRED FOR LOCALLY HEAVY SHOWERS AND PERHAPS SOME
THUNDERSTORMS INTO SATURDAY. THE SHEARLINE IS NEARLY STATIONARY
ABOUT 100 MILES NORTH OF KAUAI. THE TUTT IS FORECAST TO BE REPLACED
BY A RIDGE...RESULTING IN DRIER WEATHER COME MONDAY. CRAIG.

.HFO...ADVISORIES...FLOOD FOR PORTIONS OF MAUI UNTIL 510 PM
.      WATCHES AND WARNINGS...NONE.

Flash Flood Warnings in Hawaii, 2003Every flash flood warning in 2003

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.