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Pacific Tsunami Warning Center Domestic Product Changes

Pacific Tsunami Warning Center Domestic Product Changes. Charles McCreery Director NOAA Pacific Tsunami Warning Center. PTWC Domestic Product Changes. Hawaii: Revised Product Format / Structure Coordinate with Honolulu WFO Coordinate with Hawaii Civil Defense

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Pacific Tsunami Warning Center Domestic Product Changes

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  1. Pacific Tsunami Warning Center Domestic Product Changes Charles McCreery Director NOAA Pacific Tsunami Warning Center

  2. PTWC Domestic Product Changes • Hawaii: Revised Product Format / Structure • Coordinate with Honolulu WFO • Coordinate with Hawaii Civil Defense • Implement Target: Mid-2011 after SCN • Am. Samoa – Samoa: New Product • Finalize Procedures / Criteria • Coordinate with Am. Samoa WSO & DHS • Coordinate with Samoa NDMO • Implement Target: Mid-2011 after SCN • Guam – CNMI: New Product • Develop Procedures / Criteria • Coordinate with Guam WFO • Coordinate with Guam & CNMI EM • Implement Target: Early 2012 after SCN

  3. Common TWC Domestic Product Format • HEADER • Standard NWS header with WMO and AWIPS codes • UGC and VTEC lines • Mass News Disseminator • NARRATIVE ELEMENTS • Key Changes Since Last Product for this Event • Standard NWS Headline • Evaluation / Recommended Action • Meaning / Implications of Alert Level • Reference to Other Center’s Actions • Follow-Up Product Information • TABULAR INFORMATION • Tsunami Observations and Forecasts • Preliminary Earthquake Parameters

  4. TWC Product Header Example WEHW40 PHEB 241805 ← WMO IDENTIFIER TSUHWX ← AWIPS IDENTIFIER HIZ001>003-005>009-012>014-016>021-023>026-242005- ← UGC LINE /O.CAN.PHEB.TS.A.0013.000000T0000Z-000000T0000Z/ ← VTEC LINES /O.NEW.PHEB.TS.W.0012.100324T1805Z-000000T0000Z/ TSUNAMI MESSAGE NUMBER 2 MASS NEWS DISSEMINATOR NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI 805 AM HST WED MAR 24 2010

  5. TWC Product Narrative Section Example KEY CHANGES SINCE LAST PRODUCT THIS UPDATE INCLUDES AN UPWARD REVISED EARTHQUAKE MAGNITUDE AND THE FIRST TSUNAMI OBSERVATIONS. HEADLINE ...A TSUNAMI WARNING IS IN EFFECT FOR THE STATE OF HAWAII... EVALUATION EVALUATION A MAGNITUDE 9.0 EARTHQUAKE OCCURRED MONDAY AT 700AM HAWAIIAN STANDARD TIME IN THE ALASKA PENINSULA. A TSUNAMI WAS GENERATED BY THIS EARTHQUAKE WITH THE POTENTIAL TO BE A HAZARD IN THE STATE OF HAWAII. RECOMMENDED ACTIONS RECOMMENDED ACTIONS TUNE TO LOCAL RADIO OR TELEVISION STATIONS FOR INSTRUCTIONS FROM HAWAII STATE AND COUNTY CIVIL DEFENSE AGENCIES REGARDING ACTIONS THAT SHOULD BE TAKEN IN RESPONSE.

  6. TWC Product Narrative Section Example MEANING OF THIS ALERT LEVEL THIS TSUNAMI WARNING MEANS THE POTENTIAL FOR DANGEROUS COASTAL FLOODING AND POWERFUL OCEAN CURRENTS ALONG ALL COASTS IN THE STATE OF HAWAII IS EXPECTED. A TSUNAMI IS A SERIES OF LONG OCEAN WAVES. EACH INDIVIDUAL WAVE CREST CAN LAST 5 TO 15 MINUTES OR MORE AND EXTENSIVELY FLOOD COASTAL AREAS. THE DANGER CAN CONTINUE FOR MANY HOURS AFTER THE INITIAL WAVE AS SUBSEQUENT WAVES ARRIVE. TSUNAMI WAVE HEIGHTS CAN VARY GREATLY FROM ONE STRETCH OF COAST TO THE NEXT. THE FIRST WAVE MAY NOT BE THE LARGEST. TSUNAMI WAVES EFFICIENTLY WRAP AROUND ISLANDS. ALL SHORES ARE AT RISK NO MATTER WHICH DIRECTION THEY FACE. THE TROUGH OF A TSUNAMI WAVE MAY TEMPORARILY EXPOSE THE SEAFLOOR BUT THE AREA WILL QUICKLY FLOOD AGAIN. EXTREMELY STRONG AND UNUSUAL NEARSHORE CURRENTS CAN ACCOMPANY A TSUNAMI. DEBRIS PICKED UP AND CARRIED BY A TSUNAMI AMPLIFIES ITS DESTRUCTIVE POWER. SIMULTANEOUS HIGH TIDES OR HIGH SURF CAN SIGNIFICANTLY INCREASE THE TSUNAMI HAZARD.

  7. TWC Product Narrative Section Example OTHER CENTER’S ACTIONS THE WEST COAST/ALASKA TSUNAMI WARNING CENTER WILL ISSUE PRODUCTS FOR ALASKA...BRITISH COLUMBIA...WASHINGTON...OREGON...CALIFORNIA. THAT CAN BE FOUND ON THE INTERNET AT WCATWC.ARH.NOAA.GOV. FOLLOW-UP PRODUCT INFORMATION BULLETINS WILL BE ISSUED HOURLY OR SOONER IF CONDITIONS WARRANT.THE TSUNAMI WARNING WILL REMAIN IN EFFECT UNTIL FURTHER NOTICE. THIS PRODUCT AND ADDITIONAL INFORMATION CAN BE FOUND ON THE INTERNET AT WWW.PRH.NOAA.GOV/PR/PTWC. SEPARATOR FOR TABULAR DATA &&

  8. TWC Product Tabular Section Example TSUNAMI FORECASTS AND MEASUREMENTS MEASUREMENTS AND/OR FORECASTS OF TSUNAMI ACTIVITY ESTIMATED ARRIVAL TIMES OF THE INITIAL TSUNAMI WAVE AT LOCATIONS WITHIN THE WARNING AND WATCH AREAS ARE GIVEN BELOW. ACTUAL ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN SUCCESSIVE WAVES CAN BE FIVE MINUTES TO ONE HOUR. FORECAST AMPLITUDES GIVEN BELOW ARE ESTIMATES BASED ON NUMERICAL MODELS. THEY ARE ONLY TO PROVIDE GUIDANCE ON THE SCALE OF THE TSUNAMI IMPACT AND SHOULD BE USED CONSERVATIVELY. SITE LAT LON ARRIVAL TIME FCST AMP OBS AMP -------------------------------------------------------------------- BIG ISLAND HILO 19.7N 155.1W 1118HST MAR 24 6.6F/2.0M 6.8F/2.1M KAWAIHAE 20.0N 155.8W 1124HST MAR 24 3.3F/1.0M MAUI KAHULUI 20.9N 156.5W 1150HST MAR 24 1.2F/0.4M OAHU HONOLULU 21.3N 157.9W 1152HST MAR 24 1.5F/0.5M KAUAI NAWILIWILI 22.0N 159.4W 1201HST MAR 24 1.2F/0.4M

  9. TWC Product Tabular Section Example TSUNAMI FORECASTS AND MEASUREMENTS (CONT.) LAT – LATITUDE /N-NORTH, S-SOUTH/ LON – LONGITUDE /E-EAST, W-WEST/ ARRIVAL TIME – EXPECTED TIME OF INITIAL TSUNAMI ARRIVAL FCST AMP – FORECAST TSUNAMI AMPLITUDE ABOVE AMBIENT SEA LEVEL. OBS AMP – OBSERVED TSUNAMI AMPLITUDE ABOVE AMBIENT SEA LEVEL. IT IS ...NOT... CREST-TO-TROUGH WAVE HEIGHT. VALUES ARE GIVEN IN BOTH METERS/M/ AND FEET/F/. SEPARATOR FOR TABULAR DATA && PRELIMINARY EARTHQUAKE PARAMETERS PRELIMINARY EARTHQUAKE PARAMETERS ORIGIN TIME - 0700 HST 24 MAR 2010 COORDINATES - 55.0 NORTH 157.0 WEST DEPTH - 21 MILES/33 KM LOCATION - ALASKA PENINSULA MAGNITUDE - 9.0 END OF PRODUCT SYMBOL $$

  10. Reasons for Format Changes • Common Format for PTWC and WCATWC Products • Increase Understandability • Reduce Confusion • Common Tsunami Portal • Concise Narrative Section • Key Information Not Buried • Brief and Easy to Read on HAWAS / NAWAS • Auto Text-to-Voice • - for NOAA Weather Radio • - for Telephone Recording • Common Table of Forecasts and Observations • Forecasts & Observations together for comparison

  11. Development of Samoa Procedures • Tonga Trench Seismicity -- Continuum between Local Tsunami and Distant Tsunami • Coast Affected has High Sensitivity to Earthquake Position along the Tonga Trench • Minimum Magnitude has High Sensitivity to Earthquake Position along the Tonga Trench • At Present, Only Guidance is from RIFT Experimental Model

  12. Magnitude of earthquakes that generate at least 1 m of run-up at at least one coastal point in the Samoa Islands Sources (shallow thrust with strikes along the trench lines) 03 04 02 05 S01 7.6 7.4 7.8 6.8 06 7.8 6.7 07 7.0 08 6.9 7.1 09 * 7.3 10 7.5 11 7.4 12 7.5 13 7.6 14 7.7 15 ** 8.0 16 8.1 17 8.2 18 * S06: 15 km to the SW of the centroid of 2009 M8.0 EQ (15.5S, 172.5W) ** S17: If the strike is perpendicular to the trench, a magnitude 7.5 is sufficient to generate 1 m runup at a coastal point 8.2 19 8.3 20 S20

  13. Am. Samoa / Samoa Regionalization

  14. Am. Samoa / Samoa Forecast Points

  15. Thank You

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