Alert archive / Hawaii / Flash Flood Warnings in 2012

Flash Flood Warning 8, NWS Honolulu, HI

March 5, 2012Honolulu County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Mar 5, 2012, 3:27 AM HST for Honolulu County, Hawaii. It was in force for 8 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 5, 2012, 3:27 AM HST (13:27 UTC)
Expired: Mar 5, 2012, 11:17 AM HST
In force: 8 hr
Issued by: NWS Honolulu, HI
Area: Storm-based polygon
Flood severity: None

County Honolulu County, HI

The radar

The Molokai radar (PHMO), 87 km from the middle of the area, began a volume at 13:30 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.

What was reported inside it

Time	Report	Where	Remark
Mar 5, 6:20 AM HST	FLASH FLOOD	Waikane, HI	WAIKANE STREAM OVERFLOWED...KAMEHAMEHA HIGHWAY NEAR WAIAHOLE/WAIKANE CLOSED IN BOTH DIRECTIONS.
Mar 5, 6:54 AM HST	FLASH FLOOD	Tantalus, HI	TREE DOWN ON TANTALUS BLOCKING 3600 BLOCK ROAD.
Mar 5, 7:25 AM HST	FLASH FLOOD	2 Sw Kailua, HI	KAPAA QUARRY ROAD CLOSED DUE TO FLOODING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lihue, (PHLI), launched 12:00Z, 1.5 hours before the alert went out and 156 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: 552 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 538 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

958 
WGHW50 PHFO 051327
FFWHFO
HIC003-051630-
/O.NEW.PHFO.FF.W.0008.120305T1327Z-120305T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
327 AM HST MON MAR 5 2012

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

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

* UNTIL 630 AM HST

* AT 318 AM HST...RADAR SHOWED HEAVY RAIN NEAR NUUANU MANAO...OR 
  ABOUT NEAR HONOLULU. THE AREA OF HEAVY RAIN WAS MOVING TOWARDS THE 
  WEST AND NORTHWEST AT 15 TO 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PUNALUU...SALT LAKE...WAIKELE...KUNIA...WAIAHOLE...KAPOLEI...
  WAIPIO...WAIPAHU...WAIMANALO...WAIKANE...WAHIAWA...SCHOFIELD
  BARRACKS...PEARL CITY...MILILANI TOWN...MAUNAWILI...MAKAKILO...
  KALIHI...KANEOHE...KAILUA...HAUULA...HALAWA...AND EWA.

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 630 AM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2153 15810 2172 15798 2129 15762 2124 15781
      2129 15814

$$
LAU

5 follow-up statements

176 
WGHW70 PHFO 051446
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
446 AM HST MON MAR 5 2012

HIC003-051630-
/O.CON.PHFO.FF.W.0008.000000T0000Z-120305T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HONOLULU HI-
446 AM HST MON MAR 5 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN
HONOLULU COUNTY UNTIL 630 AM HST...

AT 430 AM HST...WEATHER RADAR SHOWED WIDESPREAD RAIN ACROSS MOST OF 
OAHU. AN ISOLATED HEAVY THUNDERSTORM WAS EMBEDDED WITH THE RAIN FIELD
NEAR KAHALUU ON THE WINDWARD SIDE. THE RAIN GAGE AT AHUIMANU HAS 
REGISTERED RAINFALL RATE OF ALMOST THREE INCHES AN HOUR. THIS STORM 
IS TRACKING TOWARDS PUNALUU AT 10 MPH. EMERGENCY AND CIVIL DEFENSE 
PERSONNEL REPORTED WIDESPREAD PONDING OF ROADS AND HIGHWAYS AROUND 
TOWN.

LOCATIONS IN THE WARNING INCLUDE EASTERN TWO THIRDS OF OAHU.

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 630 AM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2153 15810 2172 15798 2129 15762 2124 15781
      2129 15814

$$

LAU

773 
WGHW50 PHFO 051621
FFWHFO
HIC003-051930-
/O.EXT.PHFO.FF.W.0008.000000T0000Z-120305T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
621 AM HST MON MAR 5 2012

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS EXTENDED THE

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

* UNTIL 930 AM HST

* AT 610 AM HST...THE HEAVIEST RAINFALL HAS MOVED OFFSHORE TO THE 
  NORTH BUT STREAMS IN WINDWARD OAHU AND IN HONOLULU CONTINUE TO RUN 
  VERY HIGH.  MEDIA REPORTS INDICATED THAT KAMEHAMEHA HIGHWAY AT 
  WAIKANE STREAM HAS BEEN CLOSED DUE TO FLOODING.  ANOTHER AREA OF 
  HEAVY RAINFALL IS MOVING TOWARD EAST OAHU FROM THE SOUTHEAST.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PUNALUU...WAIAHOLE...WAHIAWA...KANEOHE...KAILUA...KAAAWA... 
  LAIE...KAHALUU...HAUULA AND HONOLULU.

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 PRE-EXISTING WARNING THAT WAS
IN EFFECT FOR THE ISLAND OF OAHU IN HONOLULU COUNTY.

THIS WARNING MAY NEED TO BE EXTENDED BEYOND 930 AM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2153 15810 2172 15798 2129 15762 2124 15781
      2129 15814

$$


KODAMA

310 
WGHW70 PHFO 051754
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
754 AM HST MON MAR 5 2012

HIC003-051930-
/O.CON.PHFO.FF.W.0008.000000T0000Z-120305T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HONOLULU HI-
754 AM HST MON MAR 5 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN
HONOLULU COUNTY UNTIL 930 AM HST...

EMERGENCY MANAGERS REPORTED THAT KAPAA QUARRY ROAD HAS BEEN CLOSED 
DUE TO FLOODING.  ANOTHER AREA OF HEAVY RAIN HAS REACHED SOUTH AND 
EAST OAHU.  URBAN FLOODING PROBLEMS FROM THIS RAIN AREA ARE EXPECTED 
TO OCCUR FROM HAWAII KAI TO PEARL CITY.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PUNALUU...
WAIAHOLE...WAIPIO...WAHIAWA...KANEOHE...KAILUA...KAAAWA...LAIE...
KAHALUU...HAUULA...HONOLULU...HAWAII KAI AND PEARL CITY.

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 930 AM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2153 15810 2172 15798 2129 15762 2124 15781
      2129 15814

$$

KODAMA

201 
WGHW50 PHFO 051915
FFWHFO
HIC003-052230-
/O.EXT.PHFO.FF.W.0008.000000T0000Z-120305T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
915 AM HST MON MAR 5 2012

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS EXTENDED THE

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

* UNTIL 1230 PM HST

* AT 902 AM HST...EARLIER HEAVY RAINFALL HAS MOVED OFFSHORE TOWARD 
  THE NORTHEAST BUT ANOTHER AREA OF HEAVY RAIN WILL MOVE OVER OAHU 
  FROM THE SOUTH WITHIN THE NEXT HOUR.  SINCE THE GROUND IS 
  SATURATED...ANY NEW HEAVY RAINFALL CAN QUICKLY BECOME A FLOODING 
  PROBLEM.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PUNALUU...WAIAHOLE...WAIPIO...WAIKANE...WAHIAWA...MILILANI...
  WAIPAHU...PEARL CITY...AIEA...HONOLULU...KAILUA AND KANEOHE.

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 PRE-EXISTING WARNING THAT WAS
IN EFFECT FOR THE ISLAND OF OAHU IN HONOLULU COUNTY.

THIS WARNING MAY NEED TO BE EXTENDED BEYOND 1230 PM HST IF FLASH
FLOODING PERSISTS.

LAT...LON 2153 15810 2172 15798 2129 15762 2124 15781
      2129 15814

$$


KODAMA

356 
WGHW70 PHFO 052117
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
1117 AM HST MON MAR 5 2012

HIC003-052125-
/O.CAN.PHFO.FF.W.0008.000000T0000Z-120305T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HONOLULU HI-
1117 AM HST MON MAR 5 2012

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

THE HEAVY RAINS AND FLOODING HAVE SUBSIDED...BUT RUNOFF IS STILL
OCCURRING AND STREAMS WILL REMAIN HIGH FOR SEVERAL HOURS.

A FLASH FLOOD WATCH FOR HONOLULU COUNTY REMAINS IN EFFECT THROUGH 
TUESDAY AFTERNOON.

LAT...LON 2153 15810 2172 15798 2129 15762 2124 15781
      2129 15814

$$

KODAMA

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 4, 2:38 PM HST	Special Marine Warning	HFO		112 min
Mar 4, 2:58 PM HST	Wind Advisory	HFO	Hawaii, Kauai, Kalawao	3 days
Mar 4, 3:05 PM HST	High Surf Warning	HFO	Honolulu, Kalawao	66 hr
Mar 4, 6:10 PM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Mar 4, 8:48 PM HST	Areal Flood Advisory	HFO	Honolulu	3 hr
Mar 4, 11:34 PM HST	Areal Flood Advisory	HFO	Honolulu	3 hr
Mar 5, 2:25 AM HST	Areal Flood Advisory	HFO	Honolulu	3 hr
Mar 5, 9:25 AM HST	Areal Flood Advisory	HFO	Kalawao	3 hr
Mar 5, 9:32 AM HST	Special Marine Warning	HFO		118 min
Mar 5, 9:44 AM HST	Areal Flood Advisory	HFO	Kalawao	6 hr
Mar 5, 10:16 AM HST	Special Marine Warning	HFO		119 min
Mar 5, 11:27 AM HST	Special Marine Warning	HFO		2 hr
Mar 5, 11:33 AM HST	Special Marine Warning	HFO		117 min
Mar 5, 11:58 AM HST	Special Marine Warning	HFO		32 min
Mar 5, 1:00 PM HST	Gale Warning	HFO		15 hr
Mar 5, 1:27 PM HST	Special Marine Warning	HFO		73 min

Nearby

Flash Flood Warnings in Hawaii, 2012 Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.