Alert archive / Hawaii / Flash Flood Warnings in 2004
Flash Flood Warning 42, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Mar 15, 2004, 1:00 PM HST for Kauai County, Hawaii. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 15, 2004, 1:00 PM HST (23:00 UTC)
- Expired
- Mar 15, 2004, 4:00 PM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Counties, with a storm outline in the text
County Kauai County, HI
Did it verify
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.
The nearest sounding before it
Hilo, (PITO), launched 12:00Z, 11.0 hours before the alert went out and 10 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 63 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 672 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGHW50 PHFO 152249 FFWHI HIZ004-160200- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 100 PM HST MON MAR 15 2004 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CONTINUED A * FLASH FLOOD WARNING FOR NORTH AND EAST HAWAII INCLUDING HILO AND PUNA * UNTIL 400 PM HST * AT 1250 PM HST...WEATHER RADAR INDICATED THAT THE HEAVY RAIN HAS DECREASED. RUNOFF AND STREAM LEVELS WILL...HOWEVER...REMAIN HIGH FOR THE NEXT SEVERAL HOURS. EXCESSIVE RUNOFF FROM THIS STORM HAS ALREADY CAUSED 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/KODAMA
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Honolulu, HI wrote its last area forecast discussion before this flash flood warning went out at Mar 15, 10:00 AM HST, 3 hours earlier.
Area forecast discussion, Mar 15, 10:00 AM HST, 3 hours before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 10 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 WORK WEEK. THE SMALLER ISLANDS WILL SEE DRY WEATHER AND BRISK TRADE WINDS. && .DISCUSSION... A SHEARLINE ORIENTED NORTHEAST TO SOUTHWEST OVER THE BIG ISLAND WILL TRIGGER HEAVY SHOWERS AND ISOLATED THUNDERSTORMS. THE HEAVY RAIN WILL FAVOR THE WINDWARD OR HILO SIDE OF THE ISLAND BECAUSE OF THE PREVAILING NORTHEAST WINDS. THE LEEWARD OR KONA SIDE WILL FOLLOW A CONVECTIVE PATTERN WITH DAYTIME SEA BREEZES AND NIGHTTIME LAND BREEZES WITH SHOWERS AND POSSIBLY THUNDERSTORMS FORMING DURING THE AFTERNOON AND EVENING HOURS. FOR THE SMALLER ISLANDS...STRATOCUMULUS CLOUDS WILL STACK UP OVER WINDWARD SECTIONS LEAVING LEEWARD SECTIONS UNDER MOSTLY CLEAR SKIES. LITTLE OR NO SHOWERS ARE EXPECTED BECAUSE A LOW SUBSIDENCE INVERSION NEAR 5000 FEET. THE NORTHEAST WINDS WILL BE NOTICEABLY STRONGER OVER KAUAI AND OAHU BECAUSE OF A TIGHTER PRESSURE GRADIENT BETWEEN THEM AND A SURFACE HIGH TO THE NORTHWEST. PROGS SAY THAT A LOW NORTHEAST OF HAWAII WILL NOT MOVE MUCH THROUGH THURSDAY...ALLOWING THE SHEARLINE TO REMAIN ALMOST STATIONARY OVER OR JUST SOUTH OF THE BIG ISLAND. THE THREAT OF HEAVY SHOWERS AND THUNDERSTORMS ON THE BIG ISLAND WILL REMAIN IN THE FORECAST THROUGH WEDNESDAY...BUT MAY HAVE TO BE ADDED TO THE THURSDAY FORECAST AS WELL. THE 1031 MB HIGH NORTHWEST OF THE ISLANDS HAS BEEN BLOCKED FROM MOVING EASTWARD BY THE LOW. THE STATIC PATTERN WILL CONTINUE UNTIL FRIDAY...WHEN THE LOW FINALLY LIFTS OUT TO THE NORTHEAST. THE 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 FLASH FLOOD WARNING....HILO AND PUNA UNTIL 1 PM SMALL CRAFT ADVISORY...ALL HAWAIIAN WATERS CRAIG
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 14, 2:50 PM HST | Flash Flood Warning | HFO | Honolulu, Kauai | 3 hr |
| Mar 15, 9:55 AM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
Nearby
Flash Flood Warnings in Hawaii, 2004Every flash flood warning in 2004
Sources
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.