Alert archive / Hawaii / Tsunami Watches in 2012
Tsunami Watch 1, NWS HEB
NWS HEB issued this tsunami watch at Aug 31, 2012, 2:57 AM HST for 4 counties in Hawaii. It was in force for 35 min.
The area
The counties it named.
The facts
- Issued
- Aug 31, 2012, 2:57 AM HST (12:57 UTC)
- Expired
- Aug 31, 2012, 3:32 AM HST
- In force
- 35 min
- Issued by
- NWS HEB
Counties Hawaii County, HI, Honolulu County, HI, Kalawao County, HI, Kauai County, HI
The radar
The Molokai radar (PHMO), 38 km from the middle of the area, began a volume at 13:00 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 12:00Z, 1.0 hours before the alert went out and 214 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
- 231 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 730 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
658
WEHW40 PHEB 311258
TSUHWX
HIZ001>003-005>009-012>014-016>021-023>026-311458-
/O.CAN.PHEB.TS.W.0001.000000T0000Z-000000T0000Z/
/O.NEW.PHEB.TS.A.0001.120831T1257Z-000000T0000Z/
BULLETIN
TSUNAMI MESSAGE NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
257 AM HST FRI AUG 31 2012
TO - CIVIL DEFENSE IN THE STATE OF HAWAII
SUBJECT - TSUNAMI WATCH
A TSUNAMI WATCH IS ISSUED FOR THE STATE OF HAWAII EFFECTIVE AT
0257 AM HST.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME - 0248 AM HST 31 AUG 2012
COORDINATES - 10.9 NORTH 127.1 EAST
LOCATION - PHILIPPINE ISLANDS REGION
MAGNITUDE - 7.9 MOMENT
EVALUATION
BASED ON ALL AVAILABLE DATA A TSUNAMI MAY HAVE BEEN GENERATED BY
THIS EARTHQUAKE THAT COULD BE DESTRUCTIVE ON COASTAL AREAS EVEN
FAR FROM THE EPICENTER. AN INVESTIGATION IS UNDERWAY TO DETERMINE
IF THERE IS A TSUNAMI THREAT TO HAWAII.
IF TSUNAMI WAVES IMPACT HAWAII THE ESTIMATED EARLIEST ARRIVAL OF
THE FIRST TSUNAMI WAVE IS
1228 PM HST FRI 31 AUG 2012
MESSAGES WILL BE ISSUED HOURLY OR SOONER AS CONDITIONS WARRANT.
$$1 follow-up statement
166
WEHW40 PHEB 311332
TSUHWX
HIZ001>003-005>009-012>014-016>021-023>026-311532-
/O.CAN.PHEB.TS.A.0001.000000T0000Z-000000T0000Z/
BULLETIN
TSUNAMI MESSAGE NUMBER 2
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
331 AM HST FRI AUG 31 2012
TO - CIVIL DEFENSE IN THE STATE OF HAWAII
SUBJECT - TSUNAMI WATCH CANCELLATION
THE EARTHQUAKE MAGNITUDE IS REDUCED.
THE TSUNAMI WATCH IS CANCELLED FOR THE STATE OF HAWAII EFFECTIVE
AT 0331 AM HST.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME - 0248 AM HST 31 AUG 2012
COORDINATES - 10.9 NORTH 127.1 EAST
LOCATION - PHILIPPINE ISLANDS REGION
MAGNITUDE - 7.6 MOMENT
EVALUATION
BASED ON ALL AVAILABLE DATA THERE IS NO DESTRUCTIVE TSUNAMI
THREAT TO THE STATE OF HAWAII. THEREFORE THE TSUNAMI WATCH FOR
HAWAII IS CANCELLED.
HOWEVER... SOME COASTAL AREAS IN HAWAII COULD EXPERIENCE SMALL
NON-DESTRUCTIVE SEA LEVEL CHANGES AND STRONG OR UNUSUAL CURRENTS
LASTING UP TO SEVERAL HOURS. THE ESTIMATED TIME SUCH EFFECTS
MIGHT BEGIN IS
1228 PM HST FRI 31 AUG 2012
THIS WILL BE THE FINAL MESSAGE ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED.
$$Nearby
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.