COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
453 PM HST MON JAN 18 2010
…HIGH SURF ADVISORY FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI AND THE BIG ISLAND AND FOR NORTH FACING SHORES OF MAUI…
NIIHAU-KAUAI WINDWARD-KAUAI LEEWARD-WAIANAE COAST- OAHU NORTH SHORE-OAHU KOOLAU-MOLOKAI WINDWARD-MOLOKAI LEEWARD- MAUI WINDWARD WEST-MAUI CENTRAL VALLEY-WINDWARD HALEAKALA-KONA- BIG ISLAND NORTH AND EAST-KOHALA-
453 PM HST MON JAN 18 2010
…HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST TUESDAY…
SURF ALONG NORTH AND WEST FACING SHORES OF NIIHAU AND KAUAI…AND ALONG NORTH FACING SHORES OF OAHU MOLOKAI AND MAUI…WILL BE 18 TO 22 FEET THROUGH TONIGHT…SUBSIDING TO HEIGHTS OF 15 TO 20 FEET ON TUESDAY.
SURF ALONG WEST FACING SHORES OF OAHU AND MOLOKAI WILL BE 10 TO 15 FEET THROUGH TONIGHT…LOWERING TO HEIGHTS OF 8 TO 12 FEET ON TUESDAY.
SURF ALONG WEST FACING SHORES OF THE BIG ISLAND WILL BE 6 TO 10 FEET THROUGH TUESDAY…SLOWLY SUBSIDING BELOW ADVISORY LEVELS TUESDAY NIGHT.
SURF ALONG EXPOSED NORTH FACING SHORES OF THE BIG ISLAND WILL BE 10 TO 15 FEET THROUGH TUESDAY…WITH SURF HEIGHTS GRADUALLY DIMINISHING TUESDAY NIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA…PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION.
FLOOD ADVISORY
NATIONAL WEATHER SERVICE HONOLULU HI
756 AM HST SAT NOV 14 2009
HAWAII IN HAWAII COUNTY-
756 AM HST SAT NOV 14 2009
THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A
* FLOOD ADVISORY FOR THE ISLAND OF HAWAII IN HAWAII COUNTY
* UNTIL 1045 AM HST
* AT 749 AM HST…RADAR SHOWED HEAVY RAIN MOVING ASHORE FROM HAMAKUA TO PUNA AND SOUTH TO WINDWARD PORTIONS OF KAU.
* OTHER LOCATIONS IN THE ADVISORY INCLUDE BUT ARE NOT LIMITED TO PEPEEKEO…PAHOA…OOKALA…MOUNTAIN VIEW… LAUPAHOEHOE… KEAAU…KAPOHO…HONOMU…HONOKAA…HAWAIIAN PARADISE PARK…HAWAIIAN BEACHES AND HAKALAU.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
STAY AWAY FROM STREAMS…DRAINAGE DITCHES AND LOW LYING AREAS PRONE TO FLOODING.
RAINFALL AND RUNOFF WILL ALSO CAUSE HAZARDOUS DRIVING CONDITIONS DUE TO PONDING…REDUCED VISIBILITY AND POOR BRAKING ACTION.
DO NOT CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR ON FOOT. TURN AROUND…DON/T DROWN.
A FLASH FLOOD WATCH REMAINS IN EFFECT.
THIS ADVISORY MAY NEED TO BE EXTENDED BEYOND 1045 AM HST IF HEAVY RAIN PERSISTS.
BIG ISLAND NORTH AND EAST-
INCLUDING…HILO…VOLCANO…HONOKAA…KAMUELA
322 AM HST SAT NOV 14 2009
…HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST THIS EVENING.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
330 AM HST SAT NOV 14 2009
Synopsis
Unsettled weather continues with locally heavy rains and thunderstorms possible through today. Strong trade winds will last through the weekend…along with above average rainfall. Rainfall will taper off a bit early next week…but will still likely remain higher than normal…especially for windward areas.
Discussion
Heavy showers and thunderstorms continue to pinwheel around the main Hawaiian Islands…affecting local waters for the most part but also moving across the islands from time to time. A weakening upper low about 300 miles west of Kauai has kept our airmass unstable…while east southeasterly winds continue to bring abundant moisture across the state. The focus of heavy showers and thunderstorms is near Kauai and Oahu this morning…with the heaviest activity across the Koolau Range of Oahu. Moderate to occasionally heavy showers also form across the mauka sections of Kauai from time to time. Lighter showers persist across windward and southeast sections of the Big Island. Satellite loop shows the surface low…now near 20n170w or about 700 miles west southwest of Kauai…continues moving west. The surface low has long since decoupled from the upper low…which has not moved much over the past 24 hours. This movement of the surface low away from the islands has allowed low level winds across local waters to back to almost a trade wind direction. The pressure gradient between the surface low and surface high pressure far north of the islands remains steep enough to support strong and gusty winds this morning…at or above small craft advisory criteria for the traditionally windy waters and channels.
Since heavy showers and thunderstorms remain close by…we assess the flood threat to be high enough to continue the flash flood watch through this afternoon. However…satellite loop shows that layered clouds have moved northeast of the big island…likely removing the moisture needed for snow on the big island summits. The winter weather advisory for the big island summits is therefore cancelled.
The upper low will drift slowly west over the weekend as it fills. Boundary layer moisture should remain abundant through today as well. As trades gradually swing to a more typical northeasterly direction…showers will become more terrain focused as topography takes over the main forcing mechanism. Trades will stay breezy and increase into next week with pops remaining higher than normal through the forecast period along windward zones.
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
334 PM HST TUE MAR 24 2009
…HIGH SURF ALONG EAST FACING SHORES…
.OVERVIEW….STRONG AND PERSISTENT HIGH PRESSURE CENTERED WELL NORTHEAST OF THE STATE HAS PRODUCED A BROAD FETCH OF TRADE WINDS ACROSS THE ISLANDS. THIS FETCH EXTENDS WELL EAST OF THE AREA AND IS CREATING LARGE CHOPPY SURF ALONG EXPOSED SHORES. SURF HEIGHTS WILL HOLD AT CURRENT LEVELS THROUGH EARLY THURSDAY THEN INCREASE AS LONGER PERIOD SWELL ARRIVES.
KAUAI WINDWARD-OAHU KOOLAU-OLOMANA-MOLOKAI WINDWARD- MAUI WINDWARD WEST-WINDWARD HALEAKALA-SOUTH BIG ISLAND- BIG ISLAND NORTH AND EAST-
334 PM HST TUE MAR 24 2009
…HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST FRIDAY…
THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A HIGH SURF ADVISORY…WHICH IS IN EFFECT UNTIL 6 AM HST FRIDAY.
SURF ALONG EAST FACING SHORES WILL BE 5 TO 8 FT.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA…PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION.
A 7.9-magnitude earthquake struck off the Tonga islands region, seismologists said Friday, which might affect Hawaii’s shorelines later in the afternoon.
A tsunami warning initially was issued for the surrounding area, but has been cancelled. A tsunami adivsory for Hawaii also was rescinded.
The quake, which hit at 8:17 a.m. Hawaii time, was centred 130 miles south-southeast of the Tongan capital Nuku’alofa and 300 miles east-southeast of Ndoi Island, Fiji.
It struck at a depth of 21 miles, the USGS said.
A tsunami warning initially was issued by the Pacific Tsunami Warning Center for Tonga, Niue, Kermadec Islands, American Samoa, Samoa and Fiji.
“An earthquake of this size has the potential to generate a destructive tsunami that can strike coastlines in the region near the epicentre within minutes to hours,” it said.
There were no reports of damage or of sea levels rising in Fiji or Tonga, and the tsunami warning was later canceled for Tonga, Niue, Kermadec Island, American Samoa, Samoa, Wallis-Futuna and Fiji.
However, localized waves could still cause damage.
“No tsunami threat exists for other coastal areas in the Pacific, although some other areas may experience small sea level changes,” it said in a statement on its Website.
The center said the tsunami might be felt as far away as Hawaii but was not expected to cause any damage.
No tsunami warning was issued for Australia’s coastline, and the New Zealand Press Association reported that a tsunami warning for the country had been canceled.
“There has been no damage or seas rising,” said a journalist at Fiji’s radio FM96. “Children have been told to return home from school and parents and are now collecting their children.”
The undersea quake off Tonga occurred near fault lines in the Pacific “Ring of Fire” where continental plates in the earth’s crust meet and earthquakes and volcanic activity are common.
An undersea volcanic eruption off Tonga earlier this week, thought caused by a strong sharp tremor, sent plumes of white and grey smoke towering into the sky
During the past three weeks sharp tremors have been felt in Nuku’alofa. The last, on March 13, was the longest, about four seconds, said online news site Matangi Tonga (www.matangitonga.to )
The quake occurred near fault lines in the Pacific “Ring of Fire” where continental plates in the earth’s crust meet and earthquakes and volcanic activity are common.
TSUNAMI MESSAGE NUMBER 3
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
1009 AM HST THU MAR 19 2009
TO – CIVIL DEFENSE IN THE STATE OF HAWAII
SUBJECT – FINAL TSUNAMI ADVISORY
THE TSUNAMI ADVISORY IS ENDED FOR THE STATE OF HAWAII EFFECTIVE AT 10:09 AM HST.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME – 0818 AM HST 19 MAR 2009
COORDINATES – 23.0 SOUTH 174.8 WEST
LOCATION – TONGA ISLANDS REGION
MAGNITUDE – 7.7 MOMENT
MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY
GAUGE LOCATION LAT LON TIME AMPL PER
——————- —– —— —– ————— —–
NIUE 19.1S 169.9W 1911Z 0.04M / 0.1FT 06MIN
LAT – LATITUDE (N-NORTH, S-SOUTH)
LON – LONGITUDE (E-EAST, W-WEST)
TIME – TIME OF THE MEASUREMENT (Z IS UTC IS GREENWICH TIME)
AMPL – TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL.
IT IS …NOT… CREST-TO-TROUGH WAVE HEIGHT.
VALUES ARE GIVEN IN BOTH METERS(M) AND FEET(FT).
PER – PERIOD OF TIME IN MINUTES(MIN) FROM ONE WAVE TO THE NEXT.
EVALUATION
THE PACIFIC TSUNAMI WARNING CENTER HAS CANCELLED THE REGIONAL TSUNAMI WARNING IT ISSUED FOR ANOTHER PART OF THE PACIFIC. BASED ON ALL AVAILABLE DATA THERE IS NO DESTRUCTIVE TSUNAMI THREAT TO HAWAII AND THE ADVISORY FOR HAWAII IS ALSO 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 2:36 PM HST THU 19 MAR 2009
THIS WILL BE THE FINAL MESSAGE ISSUED FOR THIS EVENT UNLESS ADDITIONAL DATA ARE RECEIVED.
MESSAGES WILL BE ISSUED HOURLY OR SOONER AS CONDITIONS WARRANT.
——————————————– Examples of ocean surges in the past
A composite photo showing sea level changes at Kamakahonu Bay, in Kailua-Kona, following an earthquake in Japan on November 15, 2006. Baron Sekiya/Hawaii247.org
Surge into Kamakahonu Bay on November 15, 2006. Video by Baron Sekiya/Hawaii247.org
The ocean surges out and into Kawaihae Harbor due to the Jan. 13, 2007 Japan earthquake. Click to view bigger image. Photo by Baron Sekiya/Hawaii247.org
Jan. 13, 2007 Japan earthquake surge into Kawaihae Harbor. Video by Baron Sekiya/Hawaii247.org
Posted on 9:48 am, Sunday, February 15, 2009. Tags: advisory, high surf
The National Weather Service has issued a high surf advisory for the Big Island through 6 p.m. Rough surf of 6-8 feet is expected for today.
A high surf advisory means that high surf will affect beaches in the advisory area producing large breaking waves, rip currents and localized beach erosion.
Posted on 3:10 pm, Monday, January 5, 2009. Tags: advisory, high surf
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
310 PM HST MON JAN 5 2009
…HIGH SURF ADVISORY FOR WEST FACING SHORES OF THE BIG ISLAND IS CANCELLED…
…HIGH SURF ADVISORY FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND THE BIG ISLAND…
.OVERVIEW…BREEZY TRADE WINDS EAST OF THE ISLANDS WILL CONTINUE TO GENERATE ROUGH SURF ALONG EAST FACING SHORES THROUGH EARLY TUESDAY.
HIZ023-026-060215-
/O.CAN.PHFO.SU.Y.0001.000000T0000Z-090106T0400Z/
KONA-KOHALA-
310 PM HST MON JAN 5 2009
…HIGH SURF ADVISORY IS CANCELLED…
SURF ALONG THE WEST FACING SHORES HAS SUBSIDED TO BELOW 8 FEET.
$$
HIZ002-008-009-012-017-020-024-025-061415-
/O.CON.PHFO.SU.Y.0001.000000T0000Z-090106T1600Z/
KAUAI WINDWARD-OAHU KOOLAU-OLOMANA-MOLOKAI WINDWARD-MAUI WINDWARD WEST-WINDWARD HALEAKALA-SOUTH BIG ISLAND-BIG ISLAND NORTH AND EAST-
310 PM HST MON JAN 5 2009
…HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY…
SURF ALONG EAST FACING SHORES OF KAUAI…OAHU…MOLOKAI…MAUI AND THE BIG ISLAND WILL BE 4 TO 8 FEET THROUGH EARLY TUESDAY MORNING.
A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA…PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION.
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
345 AM HST THU DEC 25 2008
…HIGH SURF ADVISORY FOR EAST FACING SHORES OF KAUAI OAHU
MOLOKAI MAUI AND THE BIG ISLAND…
.OVERVIEW…FRESH TRADE WINDS OVER AND EAST OF THE STATE WILL
CONTINUE TO GENERATE ROUGH AND CHOPPY SURF ALONG EAST FACING
SHORES.
HIZ002-008-009-012-017-020-025-260200-
/O.EXT.PHFO.SU.Y.0041.000000T0000Z-081227T0400Z/
KAUAI WINDWARD-OAHU KOOLAU-OLOMANA-MOLOKAI WINDWARD-
MAUI WINDWARD WEST-WINDWARD HALEAKALA-BIG ISLAND NORTH AND EAST-
345 AM HST THU DEC 25 2008
…HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM HST FRIDAY…
THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A HIGH SURF
ADVISORY…WHICH IS IN EFFECT UNTIL 6 PM HST FRIDAY.
SURF ALONG EAST FACING SHORES WILL BE 6 TO 8 FEET.
A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN
THE ADVISORY AREA…PRODUCING RIP CURRENTS AND LOCALIZED BEACH
EROSION.
