Alert archive / Hawaii / Flash Flood Warnings in 2002

Flash Flood Warning 7, NWS Honolulu, HI

February 25, 2002Honolulu County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Feb 25, 2002, 1:12 PM 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: Feb 25, 2002, 1:12 PM HST (23:12 UTC)
Expired: Feb 25, 2002, 4:15 PM HST
In force: 3 hr
Issued by: NWS Honolulu, HI
Area: Counties, with a storm outline in the text

County Honolulu County, HI

The radar

The South Shore radar (PHWA), 50 km from the middle of the area, began a volume at 23:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Hilo, (PITO), launched 12:00Z, 11.2 hours before the alert went out and 102 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: 157 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -12 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.

000 
WGHW50 PHFO 252312
FFWHI 
HIZ007-260215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
112 PM HST MON FEB 25 2002

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST HAWAII INCLUDING LEEWARD KOHALA AND KONA

* UNTIL 415 PM HST

* AT 112 PM HST...RADAR INDICATED VERY HEAVY RAIN OVER HONAUNAU...
  OR ABOUT 18 MILES SOUTHEAST OF KAILUA-KONA. THE AREA OF HEAVY 
  RAIN WAS NEARLY STATIONARY.

* LOCATIONS IN THE WARNING INCLUDE KEALAKEKUA...KAINALIU...CAPTAIN
  COOK AND HONAUNAU.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING. 
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.

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.

LAT...LON 1939 15604 1930 15583 1940 15574 1953 15593

R BALLARD/POWELL

1 follow-up statement

000 
WGHW70 PHFO 260213
FFSHI 
HIZ007-260315-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
415 PM HST MON FEB 25 2002

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WEST HAWAII HAS 
EXPIRED AT 415 PM HST...

AT 410 PM HST...RADAR SHOWED HEAVY SHOWERS AND THUNDERSTORMS HAD 
MOVED OFFSHORE...WEAKENING ALONG THE WAY. ENOUGH TIME HAS PASSED 
SINCE THE 7 INCH PER HOUR RAINFALL RATES WERE OBSERVED BY RADAR 
NEAR KEALAKEKUA TO ALLOW THE IMMEDIATE FLOOD THREAT TO DIMINISH. 
THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE.
 
POWELL

Nearby

Flash Flood Warnings in Hawaii, 2002 Every 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; radar from the NEXRAD Level II archive.