Flash Flood Warning 41, NWS Honolulu, HI

Issued

Mar 15, 2004, 9:55 AM HST (19:55 UTC)

Expired

Mar 15, 2004, 1:00 PM HST

In force

3 hr

Issued by

NWS Honolulu, HI

Area

Counties, with a storm outline in the text

County Kauai County, HI

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

000 
WGHW50 PHFO 151954
FFWHI 
HIZ004-152300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
955 AM HST MON MAR 15 2004

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR
  NORTH AND EAST HAWAII INCLUDING HILO AND PUNA

* UNTIL 1 PM HST

* THIS WARNING REPLACES THE FLOOD ADVISORY FOR HILO AND PUNA

* AT 950 AM HST...CIVIL AUTHORITIES REPORT THAT THE HEAVY RAIN HAS 
  CAUSED THE CLOSURE OF MANY ROADS...AND THE OVERFLOWING OF STREAMS 
  AND CANALS. THE HEAVY RAIN WAS NEARLY STATIONARY.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF
STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS.

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 CROSSING FLOODED ROADWAYS. TURN AROUND...DO NOT
DROWN

ESCAPE RISING WATER BY CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY
TO OUTRACE 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 OR OTHER LOCAL MEDIA SOURCES FOR THE
LATEST SEVERE WEATHER INFORMATION. REPORT FLOODING TO THE POLICE FOR
IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE.

LAT...LON 1992 15500 1974 15544 1926 15517 1947 15474
$$

CRAIG

NWS Honolulu, HI wrote its last area forecast discussion before this flash flood warning went out at Mar 15, 4:00 AM HST, 5 hours 55 minutes earlier.

HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 AM HST MON MAR 15 2004

.SYNOPSIS...
HEAVY SHOWERS AND THUNDERSTORMS REMAIN IN THE FORECAST FOR THE BIG
ISLAND THROUGH WEDNESDAY. A SHEARLINE NEAR THE BIG ISLAND WILL KEEP
CONDITIONS UNSTABLE THERE THROUGH THE MIDDLE OF THE COMING WORK
WEEK. THE WESTERN ISLANDS WILL SEE FAR FEWER SHOWERS BUT STRONGER
NORTHEAST TRADE WINDS.

&&

.DISCUSSION...
NOT MUCH HAS CHANGED FROM LAST EVENING. A SHEARLINE REMAINS OVER THE
BIG ISLAND...ORIENTED NORTHEAST TO SOUTHWEST...TRIGGERING HEAVY
SHOWERS AND ISOLATED THUNDERSTORMS ACROSS THE BIG ISLAND AND
SURROUNDING WATERS. A FIELD OF RATHER STABLE BROKEN TO OVERCAST LOW
CLOUDS COVERS WINDWARD AREAS OF THE SMALLER ISLANDS BUT HAS FEW
ASSOCIATED SHOWERS. WINDS ARE FROM THE NORTHEAST ACROSS ALL
ISLANDS...NOTICEABLY STRONGER NEAR KAUAI AND OAHU IN THE 20 TO 25
MPH RANGE.

THE 06Z GFS SHOWS THE LOW FAR NORTHEAST OF THE MAIN HAWAIIAN ISLANDS
WILL NOT MOVE MUCH THROUGH THE MIDDLE OF THE COMING WORK
WEEK...ALLOWING THE SHEARLINE OVER THE BIG ISLAND TO REMAIN ALMOST
STATIONARY. THE THREAT OF HEAVY SHOWERS AND THUNDERSTORMS ON THE
BIG ISLAND WILL REMAIN IN THE FORECAST THROUGH WEDNESDAY...BUT THIS
THREAT MAY BE EXTENDED EVEN LONGER WITH SUBSEQUENT MODEL RUNS.

THE 1031 MB HIGH NORTHWEST OF THE ISLANDS HAS BEEN BLOCKED FROM
MOVING EASTWARD BY THE LOW. BLOCKING WILL CONTINUE UNTIL
FRIDAY...WHEN THE LOW WILL FINALLY LIFT OUT TO THE NORTHEAST. THE
MAIN HIGH WILL HAVE LIFTED NORTHWARD AS WELL...BUT MODELS SHOW AN
ASSOCIATED RIDGE WILL FILL IN SOUTHEASTWARD BETWEEN THE LOW AND THE
HAWAIIAN ISLANDS AS THE LOW MOVES AWAY. BECAUSE THE RETURNING RIDGE
WILL ONLY BE AN EXTENSION OF A STRONG HIGH NORTH OF 40N...THE
INDUCED TRADES WILL LIKELY BE NOT AS STRONG AS THEY SPREAD EASTWARD
AS THEY ARE NOW.

IN SUMMARY...THE FORECAST CALLS FOR CONTINUED BOUTS OF HEAVY SHOWERS
AND THUNDERSTORMS FOR THE BIG ISLAND AT LEAST THROUGH MIDWEEK WHILE
THE SMALLER ISLANDS WILL SEE DRIER AND WINDIER CONDITIONS.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
FLOOD WATCH............ENTIRE BIG ISLAND
SMALL CRAFT ADVISORY...ALL HAWAIIAN WATERS

POWELL

Flash Flood Warnings in Hawaii, 2004Every flash flood warning in 2004

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.