Alert archive / Hawaii / Flash Flood Warnings in 2006
Flash Flood Warning 14, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Feb 21, 2006, 5:58 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
- Feb 21, 2006, 5:58 AM HST (15:58 UTC)
- Expired
- Feb 21, 2006, 9:00 AM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Counties, with a storm outline in the text
County Kauai County, HI
The nearest sounding before it
Lihue, (PHLI), launched 12:00Z, 4.0 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
- 370 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 596 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Feb 21, 4:00 AM HST, 1 hour 58 minutes earlier.
Area forecast discussion, Feb 21, 4:00 AM HST, 1 hour 58 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 400 AM HST TUE FEB 21 2006 .SYNOPSIS... HEAVY RAINFALL HAS BEGUN TO SUBSIDE ACROSS THE WESTERN ISLANDS THIS MORNING AS TRADE WINDS RETURN...TEMPORARILY...AND THE ATMOSPHERE BEGINS TO STABILIZE. WINDS WILL DECREASE BY MIDWEEK AS TROUGHS DEVELOP TO THE EAST AND WEST OF THE MAIN ISLAND CHAIN. THE POTENTIAL FOR HEAVY RAINFALL WILL PERSIST FOR THE WESTERN ISLANDS THROUGH WEDNESDAY. A FRONT IS EXPECTED TO REACH THE ISLANDS SUNDAY AND MONDAY. && .DISCUSSION... FORECAST PHILOSOPHY HAS CHANGED FROM LAST EVENING...MAINLY CONCERNING THE DEVELOPMENT OF A PAIR OF LOWS NEAR THE MAIN HAWAIIAN ISLANDS OVER THE NEXT FEW DAYS. LOW LEVEL FLOW NEAR KAUAI AND OAHU HAS VEERED OVER THE PAST 12 HOURS IN RESPONSE TO A TROUGH DEVELOPING WEST OF KAUAI. GFS75 SHOWS A CUTOFF LOW DEVELOPING 400 MILES WEST OF KAUAI BY THIS AFTERNOON...A FEATURE EXPECTED TO REINTRODUCE THE POTENTIAL FOR HEAVY SHOWERS AND FLOODING TO THE WESTERN ISLANDS INTO WEDNESDAY. WITH THIS IN MIND...THE FLOOD WATCH FOR KAUAI...OAHU AND MOLOKAI HAS BEEN EXTENDED THROUGH WEDNESDAY MORNING. THE FORECAST NOW CALLS FOR AN ALMOST COMPLETE COLLAPSE OF TRADE FLOW THROUGH THE WEEK AS A SECOND LOW FORMS...THIS ONE 500 MILES EAST OF THE ISLANDS...BY THURSDAY EVENING. THIS LOW WILL STAY EAST OF THE STATE...BRINGING WEAK NORTHERLY FLOW TO THE EASTERN ISLANDS. THE LOW WEST OF THE ISLANDS WILL HAVE FILLED IN BY THEN...RESULTING IN MUCH DRIER WEATHER THURSDAY INTO THE WEEKEND. ZONAL FLOW ALOFT WILL ASSUME ANTICYCLONIC CURVATURE LATE NEXT WEEK AS UPPER RIDGING OCCURS. THIS WILL HELP STABILIZE THE ATMOSPHERE THURSDAY THROUGH SATURDAY. A COLD FRONT IS EXPECTED TO REACH THE MAIN ISLANDS SUNDAY AND STALL ACROSS THE CENTRAL ISLANDS MONDAY. THE FRONT WILL BRING YET ANOTHER BOUT OF SHOWERS ALONG WITH BRISK NORTH NORTHEAST WINDS. THE FORECAST PERIOD ENDS WITH THESE POSTFRONTAL WINDS VEERING TO BRISK EASTERLY TRADES LATE NEXT MONDAY INTO NEXT TUESDAY. && .HFO WATCHES/WARNINGS/ADVISORIES... FLOOD WATCH UNTIL NOON WEDNESDAY FOR KAUAI OAHU AND MOLOKAI. && POWELL
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 20, 6:45 PM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
| Feb 20, 9:39 PM HST | Flash Flood Warning | HFO | Kauai | 66 min |
| Feb 21, 12:13 AM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
| Feb 21, 3:11 AM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
| Feb 21, 7:20 AM HST | Special Marine Warning | HFO | 110 min | |
| Feb 21, 8:47 AM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
| Feb 21, 11:55 AM HST | Special Marine Warning | HFO | 2 hr | |
| Feb 21, 1:48 PM HST | Special Marine Warning | HFO | 71 min |
Nearby
Flash Flood Warnings in Hawaii, 2006Every flash flood warning in 2006
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.