WPAC: MEKKHALA - Post-Tropical

[Ed_2001]

Looks like JTWC referenced the buoy data as well.

A SUBSEQUENT 102100Z INTERMEDIATE POSITION INTENSITY HAS ALSO BEEN INCREASED TO 70 KNOTS BASED ON A REPORT OF A CHINESE BUOY WHICH REPORTED A 10-MIN AVERAGE WIND OF 63 KNOTS, WHICH EQUATES TO A 69 KNOTS 1-MIN AVERAGE.

[doomhaMwx]

Observed min pressure from Zhangpu, where landfall occurred, matches well with the one recorded by the buoy. I suppose the obs from Zhangpu are sea-level.

[euro6208]

Final Warning

WTPN33 PGTW 110300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TYPHOON 07W (MEKKHALA) WARNING NR 007//
RMKS/
1. TYPHOON 07W (MEKKHALA) WARNING NR 007
UPGRADED FROM TROPICAL DEPRESSION 07W
03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
110000Z --- NEAR 24.1N 117.7E
MOVEMENT PAST SIX HOURS - 330 DEGREES AT 13 KTS
POSITION ACCURATE TO WITHIN 020 NM
POSITION BASED ON EYE FIXED BY A COMBINATION OF
SATELLITE AND RADAR
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 010 NM NORTHEAST QUADRANT
010 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 035 NM NORTHEAST QUADRANT
035 NM SOUTHEAST QUADRANT
025 NM SOUTHWEST QUADRANT
020 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
055 NM NORTHWEST QUADRANT
REPEAT POSIT: 24.1N 117.7E
---
FORECASTS:
12 HRS, VALID AT:
111200Z --- 26.7N 117.3E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
VECTOR TO 24 HR POSIT: 005 DEG/ 14 KTS
---
24 HRS, VALID AT:
120000Z --- 29.4N 117.5E
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
VECTOR TO 36 HR POSIT: 015 DEG/ 19 KTS
---
36 HRS, VALID AT:
121200Z --- 33.1N 118.5E
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
---
REMARKS:
110300Z POSITION NEAR 24.8N 117.6E.
11AUG20. TYPHOON 07W (MEKKHALA), LOCATED APPROXIMATELY 216 NM
WEST-SOUTHWEST OF TAIPEI, TAIWAN, HAS TRACKED NORTH-NORTHWESTWARD
AT 13 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY SHOWS THAT TYPHOON MEKKHALA IS QUICKLY BECOMING SHEARED, WITH
THE OUTER LOW LEVEL BANDS ON THE NORTH SIDE OF THE SYSTEM NOW
EXPOSED, BUT WITH DEEP CONVECTION REMAINING IN PLACE OVER AND SOUTH
OF THE ASSESSED CENTER. THE INITIAL POSITION IS PLACED WITH HIGH
CONFIDENCE BASED ON COMPOSITE CHINESE RADAR DATA. A REASSESSMENT OF
EARLIER INTENSITY ESTIMATES HAS LED TO AN INCREASE IN THE INITIAL
INTENSITY AT THE 101800Z POSITION TO 65 KNOTS BASED ON AMSR2
WINDSPEED ESTIMATE OF 64 KNOTS AT 1743Z. A SUBSEQUENT 102100Z
INTERMEDIATE POSITION INTENSITY HAS ALSO BEEN INCREASED TO 70 KNOTS
BASED ON BUOY DATA REPORTING A 10-MIN AVERAGE WIND OF 63 KNOTS, WHICH
EQUATES TO A 69 KNOTS 1-MIN AVERAGE. TYPHOON 07W MADE LANDFALL ALONG
THE CHINESE COAST AROUND 2200Z AND IS NOW MOVING FURTHER INLAND. THE
SYSTEM IS FORECAST TO CONTINUE TRACKING NORTHWARD WHILE WEAKENING,
FULLY DISSIPATING OVERLAND BY TAU 36. DYNAMIC MODEL GUIDANCE IS IN
TIGHT AGREEMENT, LENDING HIGH CONFIDENCE TO THE JTWC TRACK. 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. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 110000Z IS 15 FEET.
REFER TO TROPICAL CYCLONE 05W (JANGMI) WARNINGS (WTPN31 PGTW) FOR
SIX-HOURLY UPDATES. REFER TO TROPICAL DEPRESSION 06W (SIX) WARNINGS
(WTPN32 PGTW) FOR SIX-HOURLY UPDATES.//
NNNN

[mrbagyo]

JMA keeps on ignoring weather obs of other country. JMA - "Just Mine is Accurate"?

Zhangzhou radar loop - August 10, 2020 0000z to August 11, 2020 0600z

[Ed_2001]

JMA keeps on ignoring weather obs of other country. JMA - "Just Mine is Accurate"?

Zhangzhou radar loop - August 10, 2020 0000z to August 11, 2020 0600z

IMO weather observations aside JMA always seems to have a tendency to underestimate storms in the South China Sea.

[Ed_2001]

 https://twitter.com/XHNews/status/1293063073742221314