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West Pacific Tropical Cyclone Discussion

910
WTPN31 PGTW 182100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 01W (MEKKHALA) WARNING NR 022
01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
181800Z --- NEAR 16.2N 121.7E
MOVEMENT PAST SIX HOURS - 355 DEGREES AT 11 KTS
POSITION ACCURATE TO WITHIN 020 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
REPEAT POSIT: 16.2N 121.7E
---
FORECASTS:
12 HRS, VALID AT:
190600Z --- 16.9N 121.4E
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
VECTOR TO 24 HR POSIT: 340 DEG/ 03 KTS
---
24 HRS, VALID AT:
191800Z --- 17.4N 121.2E
MAX SUSTAINED WINDS - 015 KT, GUSTS 025 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
---
REMARKS:
182100Z POSITION NEAR 16.4N 121.6E.
TROPICAL DEPRESSION (TD) 01W (MEKKHALA), LOCATED APPROXIMATELY 72 NM
EAST OF BAGUIO, PHILIPPINES, HAS TRACKED NORTHWARD AT 11 KNOTS OVER
THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR) SATELLITE
IMAGERY SHOWS THE SYSTEM HAS MADE A SECONDARY LANDFALL INTO LUZON
NEAR CASIGURAN, AURORA PROVINCE. THE EIR LOOP ALSO SHOWS TD 01W
STRIPPED OF DEEP CONVECTION BY STRONG VERTICAL WIND SHEAR (VWS) AND
THE LOW LEVEL CIRCULATION STRANDED BY THE RUGGED SIERRA MADRE
MOUNTAIN RANGE. THE INITIAL POSITION IS BASED ON THE EIR ANIMATION
AIDED BY A COMPOSITE DOPPLER RADAR LOOP FROM PAGASA WITH FAIR
CONFIDENCE. THE INITIAL INTENSITY IS EXTRAPOLATED FROM NEARBY SURFACE
OBSERVATIONS AND FROM THE 181500Z PGTW DVORAK ESTIMATE. TD MEKKHALA
IS EXPECTED TO DISSIPATE BY TAU 12 DUE TO FRICTIONAL EFFECTS AND HIGH
VWS. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON
WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR
SIGNS OF REGENERATION.//


490
WTPN31 PGTW 182100 AMD
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 01W (MEKKHALA) WARNING NR 022A AMENDED AND
RELOCATED
01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
181800Z --- NEAR 15.7N 123.0E
MOVEMENT PAST SIX HOURS - 355 DEGREES AT 08 KTS
POSITION ACCURATE TO WITHIN 015 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
REPEAT POSIT: 15.7N 123.0E
---
FORECASTS:
12 HRS, VALID AT:
190600Z --- 16.9N 123.2E
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
VECTOR TO 24 HR POSIT: 005 DEG/ 05 KTS
---
24 HRS, VALID AT:
191800Z --- 17.9N 123.3E
MAX SUSTAINED WINDS - 015 KT, GUSTS 025 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
182100Z POSITION NEAR 16.0N 123.0E.
TROPICAL DEPRESSION 01W (MEKKHALA), LOCATED APPROXIMATELY 142 NM
EAST-SOUTHEAST OF BAGUIO, PHILIPPINES, HAS TRACKED NORTHWARD AT
08 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR)
SATELLITE IMAGERY SHOWS A RAGGED LOW LEVEL CIRCULATION THAT HAS
BECOME FULLY EXPOSED AS IT WAS STRIPPED OF DEEP CONVECTION BY STRONG
VERTICAL WIND SHEAR (VWS) THE INITIAL POSITION IS BASED ON THE EIR
ANIMATION AIDED BY A COMPOSITE DOPPLER RADAR LOOP FROM PAGASA WITH
FAIR CONFIDENCE. THE INITIAL INTENSITY IS EXTRAPOLATED FROM NEARBY
SURFACE OBSERVATIONS AND FROM THE 181500Z PGTW DVORAK ESTIMATE. TD
MEKKHALA IS EXPECTED TO DISSIPATE BY TAU 12 DUE TO THE HIGH VWS.
THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON
WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR
SIGNS OF REGENERATION. JUSTIFICATION FOR AMENDMENT: RELOCATED INITIAL
AND FORECAST POSITIONS AFTER ANALYSIS OF UPDATED AND MORE ACCURATE
SATELLITE DATA. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 181800Z
IS 10 FEET.//


392
WTPN31 PGTW 182100 CCA
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 01W (MEKKHALA) WARNING NR 022A AMENDED AND
RELOCATED
01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
181800Z --- NEAR 15.7N 123.0E
MOVEMENT PAST SIX HOURS - 355 DEGREES AT 08 KTS
POSITION ACCURATE TO WITHIN 015 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
REPEAT POSIT: 15.7N 123.0E
---
FORECASTS:
12 HRS, VALID AT:
190600Z --- 16.9N 123.2E
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
VECTOR TO 24 HR POSIT: 005 DEG/ 05 KTS
---
24 HRS, VALID AT:
191800Z --- 17.9N 123.3E
MAX SUSTAINED WINDS - 015 KT, GUSTS 025 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
182100Z POSITION NEAR 16.0N 123.0E.
TROPICAL DEPRESSION 01W (MEKKHALA), LOCATED APPROXIMATELY 142 NM
EAST-SOUTHEAST OF BAGUIO, PHILIPPINES, HAS TRACKED NORTHWARD AT
08 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR)
SATELLITE IMAGERY SHOWS A RAGGED LOW LEVEL CIRCULATION THAT HAS
BECOME FULLY EXPOSED AS IT WAS STRIPPED OF DEEP CONVECTION BY STRONG
VERTICAL WIND SHEAR (VWS) THE INITIAL POSITION IS BASED ON THE EIR
ANIMATION AIDED BY A COMPOSITE DOPPLER RADAR LOOP FROM PAGASA WITH
FAIR CONFIDENCE. THE INITIAL INTENSITY IS EXTRAPOLATED FROM NEARBY
SURFACE OBSERVATIONS AND FROM THE 181500Z PGTW DVORAK ESTIMATE. TD
MEKKHALA IS EXPECTED TO DISSIPATE BY TAU 12 DUE TO THE HIGH VWS.
THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON
WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR
SIGNS OF REGENERATION. JUSTIFICATION FOR AMENDMENT: RELOCATED INITIAL
AND FORECAST POSITIONS AFTER ANALYSIS OF UPDATED AND MORE ACCURATE
SATELLITE DATA. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 181800Z
IS 10 FEET.//


274
WTPN31 PGTW 182100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 01W (MEKKHALA) WARNING NR 022A AMENDED AND
RELOCATED
01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
181800Z --- NEAR 15.7N 123.0E
MOVEMENT PAST SIX HOURS - 355 DEGREES AT 08 KTS
POSITION ACCURATE TO WITHIN 015 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
REPEAT POSIT: 15.7N 123.0E
---
FORECASTS:
12 HRS, VALID AT:
190600Z --- 16.9N 123.2E
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
VECTOR TO 24 HR POSIT: 005 DEG/ 05 KTS
---
24 HRS, VALID AT:
191800Z --- 17.9N 123.3E
MAX SUSTAINED WINDS - 015 KT, GUSTS 025 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
182100Z POSITION NEAR 16.0N 123.0E.
TROPICAL DEPRESSION 01W (MEKKHALA), LOCATED APPROXIMATELY 142 NM
EAST-SOUTHEAST OF BAGUIO, PHILIPPINES, HAS TRACKED NORTHWARD AT
08 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR)
SATELLITE IMAGERY SHOWS A RAGGED LOW LEVEL CIRCULATION THAT HAS
BECOME FULLY EXPOSED AS IT WAS STRIPPED OF DEEP CONVECTION BY STRONG
VERTICAL WIND SHEAR (VWS) THE INITIAL POSITION IS BASED ON THE EIR
ANIMATION AIDED BY A COMPOSITE DOPPLER RADAR LOOP FROM PAGASA WITH
FAIR CONFIDENCE. THE INITIAL INTENSITY IS EXTRAPOLATED FROM NEARBY
SURFACE OBSERVATIONS AND FROM THE 181500Z PGTW DVORAK ESTIMATE. TD
MEKKHALA IS EXPECTED TO DISSIPATE BY TAU 12 DUE TO THE HIGH VWS.
THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON
WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR
SIGNS OF REGENERATION. JUSTIFICATION FOR AMENDMENT: RELOCATED INITIAL
AND FORECAST POSITIONS AFTER ANALYSIS OF UPDATED AND MORE ACCURATE
SATELLITE DATA. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 181800Z
IS 10 FEET.//

Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office



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It was last modified on: Tue, Sep 21 2010 - 2314 UTC
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