Alert archive / Hawaii / Flash Flood Warnings in 2009

Flash Flood Warning 21, NWS Honolulu, HI

November 14, 2009Honolulu County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Nov 14, 2009, 2:37 AM HST for Honolulu 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: Nov 14, 2009, 2:37 AM HST (12:37 UTC)
Expired: Nov 14, 2009, 5:30 AM HST
In force: 3 hr
Issued by: NWS Honolulu, HI
Area: Storm-based polygon
Flood severity: None

County Honolulu County, HI

The nearest sounding before it

Lihue, (PHLI), launched 12:00Z, 0.6 hours before the alert went out and 149 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1515 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 764 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

703 
WGHW50 PHFO 141237
FFWHFO
HIC003-141530-
/O.NEW.PHFO.FF.W.0021.091114T1237Z-091114T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
237 AM HST SAT NOV 14 2009

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE ISLAND OF OAHU IN HONOLULU COUNTY

* UNTIL 530 AM HST

* AT 232 AM HST...RADAR SHOWED HEAVY RAIN IN THE LAIE HAUULA AREAS 
  OF OAHU. THE HEAVY SHOWERS AND THUNDERSTORMS HAVE BEEN TRAINING 
  OVER THIS AREA IN THE PAST FEW HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PUNALUU...LAIE AND KAHUKU.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS FLASH FLOODING IS IMMINENT OR OCCURRING
IN STREAMS...ROADS AND LOW LYING AREAS. MOVE TO HIGHER GROUND NOW.

DO NOT CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR ON FOOT.
TURN AROUND...DON/T DROWN.

&&

THIS FLASH FLOOD WARNING REPLACES THE FLOOD ADVISORY THAT WAS IN
EFFECT FOR THE ISLAND OF OAHU IN HONOLULU COUNTY.

THIS WARNING MAY NEED TO BE EXTENDED BEYOND 530 AM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2163 15805 2170 15795 2155 15786 2151 15792
      2152 15797

$$
H LAU

The office that day

Everything else NWS Honolulu, HI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 13, 7:25 PM HST	Special Marine Warning	HFO		92 min
Nov 13, 9:10 PM HST	Areal Flood Advisory	HFO	Kauai	8 hr
Nov 13, 10:00 PM HST	Areal Flood Advisory	HFO	Honolulu	8 hr
Nov 14, 5:20 AM HST	Flash Flood Warning	HFO	Honolulu	115 min
Nov 14, 6:41 AM HST	Areal Flood Advisory	HFO	Kauai	3 hr
Nov 14, 7:21 AM HST	Areal Flood Advisory	HFO	Honolulu	5 hr
Nov 14, 7:56 AM HST	Areal Flood Advisory	HFO	Hawaii	9 hr
Nov 14, 7:56 AM HST	Flash Flood Warning	HFO	Kauai	9 hr
Nov 14, 9:50 AM HST	Special Marine Warning	HFO		115 min
Nov 14, 11:34 AM HST	Special Marine Warning	HFO		116 min
Nov 14, 1:27 PM HST	Special Marine Warning	HFO		2 hr

Nearby

Flash Flood Warnings in Hawaii, 2009 Every flash flood warning in 2009

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.