Alert archive / Hawaii / Flash Flood Warnings in 2002
Flash Flood Warning 23, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Oct 17, 2002, 10:45 AM 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 counties it named.
The facts
- Issued
- Oct 17, 2002, 10:45 AM HST (20:45 UTC)
- Expired
- Oct 17, 2002, 1:45 PM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Whole counties
County Kauai County, HI
The nearest sounding before it
Lihue, (PHLI), launched 12:00Z, 8.8 hours before the alert went out and 37 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
- 305 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGHW50 PHFO 172043 FFWHI HIZ001-172345- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 1045 AM HST THU OCT 17 2002 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... KAUAI INCLUDING THE COMMUNITIES OF...ANAHOLA...KUMUKUMU...KILAUEA * UNTIL 145 PM HST * AT 1040 AM HST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS DEVELOPING OVER NORTHEAST KAUAI. * THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL BE NEAR...ANAHOLA...KUMUKUMU...KILAUEA. RAIN GAGE AND RADAR DATA SHOWS VERY HEAVY RAINFALL AMOUNTS OCCURRING OVER NORTHEAST KAUAI AND FLOODING IS IMMINENT. THE SOURCE THUNDERSTORMS ARE NEARLY STATIONARY...ENHANCING THE FLOOD THREAT FOR THESE AREAS. 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 KAUAI 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. THIS STORM WILL PRODUCE DANGEROUS LIGHTNING. LIGHTNING IS A LEADING KILLER AND PRECAUTIONS SHOULD BE TAKEN TO AVOID BEING STRUCK BY LIGHTNING. STAY OUT FROM UNDER TALL TREES AND AWAY FROM THE OCEAN AND BEACHES IF LIGHTNING IS OCCURRING. DO NOT TOUCH OR REMAIN CLOSE TO METAL POLES OR FENCES. STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV OR RADIO FOR FURTHER NATIONAL WEATHER SERVICE INFORMATION. $$ POWELL WGHW50 PHFO 172043 FFWHI HIZ001-172345- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 1045 AM HST THU OCT 17 2002 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... KAUAI INCLUDING THE COMMUNITIES OF...ANAHOLA...KUMUKUMU...KILAUEA * UNTIL 145 PM HST * AT 1040 AM HST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS DEVELOPING OVER NORTHEAST KAUAI. * THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL BE NEAR...ANAHOLA...KUMUKUMU...KILAUEA. RAIN GAGE AND RADAR DATA SHOWS VERY HEAVY RAINFALL AMOUNTS OCCURRING OVER NORTHEAST KAUAI AND FLOODING IS IMMINENT. THE SOURCE THUNDERSTORMS ARE NEARLY STATIONARY...ENHANCING THE FLOOD THREAT FOR THESE AREAS. FLASH FLOODING IS EXPECTED IN NORMALLY DRY STREAMBEDS DURING THE NEXT THREE HOURS. PERSONS IN LOW-LYING OR FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. PERSON ON KAUAI SHOULD TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY AND SEEK HIGHER GROUND OR REMAIN INDOORS. MOTORISTS SHOULD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO CROSS FAST FLOWING OR RISING WATER...MANY FLASH FLOOD DEATHS OCCUR WHEN MOTORISTS TRY TO CROSS FLOODED ROADWAYS. ESCAPE RISING WATER BY CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY TO OUTRUN A FLOOD EITHER ON FOOT OR IN YOUR VEHICLE. DO NOT CAMP NEAR STREAMS OR OTHER AREAS SUBJECT TO FLOODING. THIS STORM WILL PRODUCE DANGEROUS LIGHTNING. LIGHTNING IS A LEADING KILLER AND PRECAUTIONS SHOULD BE TAKEN TO AVOID BEING STRUCK BY LIGHTNING. STAY OUT FROM UNDER TALL TREES AND AWAY FROM THE OCEAN AND BEACHES IF LIGHTNING IS OCCURRING. DO NOT TOUCH OR REMAIN CLOSE TO METAL POLES OR FENCES. STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV OR RADIO FOR FURTHER NATIONAL WEATHER SERVICE INFORMATION. $$ POWELL
1 follow-up statement
000 WGHW70 PHFO 172152 FFSHI HIZ001-172355- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 1155 AM HST THU OCT 17 2002 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM HST FOR KAUAI... RADAR INDICATES THAT THE FOCUS OF HEAVY RAINFALL HAS SHIFTED A BIT SOUTH OVER THE PAST HOUR TOWARDS KEALIA. RAINFALL RATES IN EXCESS OF 4 INCHES PER HOUR WERE SEEN ON RADAR WITHIN THE HOUR BETWEEN KEALIA AND ANAHOLA JUST ONSHORE. THESE STORMS WERE ANCHORED OVER NORTHEAST KAUAI FOR THE PAST HOUR...BUT HAVE BEGUN TO DRIFT OFFSHORE TO THE EAST AND NORTHEAST. IF NO NEW CELLS FORM ONSHORE...AND IF THE CURRENT MOVEMENT OF EXISTING CELLS PERSISTS...HEAVY RAINFALL SHOULD CEASE OVER THE ISLAND OF KAUAI WITHIN THE HOUR. HOWEVER...HEAVY RUNOFF WILL PRESENT A FLOOD HAZARD AFTER THE HEAVY RAIN CEASES. STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV OR RADIO FOR FURTHER NATIONAL WEATHER SERVICE INFORMATION. $$ POWELL WGHW70 PHFO 172152 FFSHI HIZ001-172355- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 1155 AM HST THU OCT 17 2002 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM HST FOR KAUAI... RADAR INDICATES THAT THE FOCUS OF HEAVY RAINFALL HAS SHIFTED A BIT SOUTH OVER THE PAST HOUR TOWARDS KEALIA. RAINFALL RATES IN EXCESS OF 4 INCHES PER HOUR WERE SEEN ON RADAR WITHIN THE HOUR BETWEEN KEALIA AND ANAHOLA JUST ONSHORE. THESE STORMS WERE ANCHORED OVER NORTHEAST KAUAI FOR THE PAST HOUR...BUT HAVE BEGUN TO DRIFT OFFSHORE TO THE EAST AND NORTHEAST. IF NO NEW CELLS FORM ONSHORE...AND IF THE CURRENT MOVEMENT OF EXISTING CELLS PERSISTS...HEAVY RAINFALL SHOULD CEASE OVER THE ISLAND OF KAUAI WITHIN THE HOUR. HOWEVER...HEAVY RUNOFF WILL PRESENT A FLOOD HAZARD AFTER THE HEAVY RAIN CEASES. STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV OR RADIO FOR FURTHER NATIONAL WEATHER SERVICE INFORMATION. $$ POWELL
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 Oct 17, 10:36 AM HST, 9 minutes earlier.
Area forecast discussion, Oct 17, 10:36 AM HST, 9 minutes before
HAWAIIAN ISLANDS SYNOPTIC DISCUSSION AND GUIDANCE NATIONAL WEATHER SERVICE HONOLULU HI 10 AM HST THU OCT 17 2002 SUMMARY...EXPECT WET AND UNSTABLE WEATHER TO CONTINUE THROUGH FRIDAY...THANKS TO A STALLED FRONTAL BAND ACROSS THE MAIN ISLANDS AND WEAK LOW PRESSURE APPROACHING FROM THE SOUTHWEST. HEAVY SHOWERS AND THUNDERSTORMS ARE POSSIBLE ON ALL OF THE MAIN ISLANDS. HOWEVER...THE POTENTIAL FOR HEAVY RAINFALL WILL DIMINISH BY SATURDAY...AND TRADE WIND WEATHER IS EXPECTED TO RETURN SUNDAY. DISCUSSION...A 350 MILE WIDE BAND OF UNSTABLE LAYERED CLOUDS LIES ACROSS THE MAIN HAWAIIAN ISLANDS THIS MORNING...MARKING A STALLED FRONT. THE PARENT LOW IS ABOUT 1500 MILES NORTH OF HAWAII...AND THE EASTERNMOST PORTION OF THE FRONTAL SYSTEM IS POISED TO CROSS OVER NORTHERN CALIFORNIA AND OREGON ON THE MAINLAND. THE FRONT HAS PENETRATED FAR ENOUGH SOUTH INTO THE TROPICS TO TAP INTO DEEP TROPICAL MOISTURE SOUTH OF 15N...AND FRONTAL DYNAMICS ARE TRANSPORTING THIS MOISTURE NORTHEASTWARD TOWARDS THE ISLANDS. THIS IS THE THIRD FULL DAY THE STATE HAS BEEN UNDER THE INFLUENCE OF THIS SYSTEM. HEAVY SHOWERS AND THUNDERSTORMS ARE CONCENTRATED OVER MAUI COUNTY THIS MORNING...BUT SATELLITE LOOP AND RADAR SHOWS THE THREAT FOR ADVERSE WEATHER MAY SPREAD TO OAHU AND KAUAI WITHIN THE NEXT FEW HOURS. THUNDERSTORMS ARE EXPECTED TO POP UP OVER THE BIG ISLAND LATER TODAY AS DAYTIME HEATING INTENSIFIES. A WEAK LOW HAS FORMED ALONG THE FRONT 600 MILES OR SO SOUTHWEST OF THE MAIN ISLANDS. AS THIS LOW MOVES NORTHEAST ALONG THE FRONTAL BAND TODAY AND TOMORROW...IT WILL BECOME ANOTHER PRODUCER OF SHOWERS AND THUNDERSTORMS...POSSIBLY EXTENDING OUR STRETCH OF BAD WEATHER INTO EARLY SATURDAY. MODELS CONTINUE TO SHOW DRIER WEATHER MOVING IN BEGINNING SUNDAY AS WIND FLOW ALOFT ASSUMES A MORE ZONAL...WEST TO EAST...PATTERN TO OUR NORTH. THIS TYPE OF PATTERN WOULD CUT OFF UPPER LEVEL SUPPORT FOR WIDESPREAD ADVERSE WEATHER...AND ENCOURAGE THE REBUILDING OF THE SUBTROPICAL RIDGE TO OUR NORTH. THIS...IN TURN...WOULD HERALD THE RETURN OF TRADE WINDS AND ASSOCIATED TRADE WIND WEATHER. POWELL .HFO...WARNINGS.....NONE . WATCHES......FLOOD ENTIRE STATE . ADVISORIES...URBAN AND SMALL STREAM LANAI AND WEST MAUI . HIGH SURF NW-FACING SHORES OF ALL ISLANDS
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 17, 12:30 PM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
Nearby
Flash Flood Warnings in Hawaii, 2002Every flash flood warning in 2002
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.