Alert archive / Hawaii / Flash Flood Warnings in 2011

Flash Flood Warning 16, NWS Honolulu, HI

March 4, 2011Kauai County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Mar 4, 2011, 3:46 PM HST for Kauai County, Hawaii. It was in force for 99 min. 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 4, 2011, 3:46 PM HST (01:46 UTC)
Expired: Mar 4, 2011, 5:25 PM HST
In force: 99 min
Issued by: NWS Honolulu, HI
Area: Storm-based polygon
Flood severity: None

County Kauai County, HI

The radar

The South Kauai radar (PHKI), 31 km from the middle of the area, began a volume at 01:46 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

Lihue, (PHLI), launched 00:00Z, 1.8 hours before the alert went out and 27 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: 237 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 671 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

089 
WGHW50 PHFO 050146
FFWHFO
HIC007-050445-
/O.NEW.PHFO.FF.W.0016.110305T0146Z-110305T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
346 PM HST FRI MAR 4 2011

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE ISLAND OF KAUAI IN KAUAI COUNTY

* UNTIL 645 PM HST

* AT 330 PM HST...A GAGE ON HANALEI RIVER SHOWED A RAPID RISE IN 
  WATER LEVEL TO EXCEED 7 FEET.  THIS MAY FORCE THE CLOSING OF 
  KUHIO HIGHWAY AT THE HANALEI BRIDGE WITHIN THE NEXT HOUR.  

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HANALEI...PRINCEVILLE AND HAENA.

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 WARNING MAY NEED TO BE EXTENDED BEYOND 645 PM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2224 15964 2224 15937 2206 15946 2206 15956

$$


KODAMA

1 follow-up statement

207 
WGHW70 PHFO 050325
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
525 PM HST FRI MAR 4 2011

HIC007-050334-
/O.CAN.PHFO.FF.W.0016.000000T0000Z-110305T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KAUAI IN KAUAI COUNTY-
525 PM HST FRI MAR 4 2011

...THE FLASH FLOOD WARNING IS CANCELLED FOR THE ISLAND OF KAUAI IN
KAUAI COUNTY...

MODERATE TO LOCALLY HEAVY SHOWERS CONTINUE TO AFFECT THE NORTH AND 
EAST FACING SLOPES OF KAUAI...BUT WATER LEVELS IN THE HANALEI RIVER 
ARE RECEDING...AND KUHIO HIGHWAY REMAINS OPEN IN HANALEI. 

A FLASH FLOOD WATCH REMAINS IN EFFECT.

LAT...LON 2224 15964 2224 15937 2206 15946 2206 15956

$$

BIRCHARD

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 4, 2:41 PM HST	Areal Flood Advisory	HFO	Kauai	3 hr
Mar 4, 3:14 PM HST	Wind Advisory	HFO	Hawaii, Kalawao	24 hr
Mar 4, 3:31 PM HST	Winter Weather Advisory	HFO	Hawaii	72 hr
Mar 4, 3:42 PM HST	Areal Flood Advisory	HFO	Kalawao	3 hr
Mar 4, 5:29 PM HST	Areal Flood Advisory	HFO	Kauai	3 hr
Mar 4, 6:43 PM HST	Areal Flood Advisory	HFO	Kalawao	3 hr

Nearby

Flash Flood Warnings in Hawaii, 2011 Every flash flood warning in 2011

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.