TPPS13 PGTW 271511
A. TROPICAL CYCLONE 21P (SERU)
B. 27/1430Z
C. 22.74S
D. 171.60E
E. FIVE/GK2A
F. T2.5/2.5/W0.5/24HRS STT: S0.0/03HRS
G. IR/EIR
H. REMARKS: 71A/PBO XTRP/ANMTN. LLCC LOCATED WITHIN 75NM OF COLD
OVERCAST GREATER THAN 90NM ACROSS YIELDS A DT OF 2.0. MET YIELDS 2.5.
PT YIELDS 2.5. DBO PT.
I. ADDITIONAL POSITIONS: NONE
RAE

TPPS13 PGTW 271511
A. TROPICAL CYCLONE 21P (SERU)
B. 27/1430Z
C. 22.74S
D. 171.60E
E. FIVE/GK2A
F. T2.5/2.5/W0.5/24HRS STT: S0.0/03HRS
G. IR/EIR
H. REMARKS: 71A/PBO XTRP/ANMTN. LLCC LOCATED WITHIN 75NM OF COLD
OVERCAST GREATER THAN 90NM ACROSS YIELDS A DT OF 2.0. MET YIELDS 2.5.
PT YIELDS 2.5. DBO PT.
I. ADDITIONAL POSITIONS: NONE
RAE

21P SERU 250227 1800 23.1S 172.3E SHEM 40 996

TPPS13 PGTW 271821
A. TROPICAL CYCLONE 21P (SERU)
B. 27/1730Z
C. 23.13S
D. 172.07E
E. FIVE/HMWRI9
F. T2.5/2.5/W0.5/24HRS STT: S0.0/03HRS
G. IR/EIR
H. REMARKS: 71A/PBO XTRP/ANMTN. LLCC LOCATED WITHIN 75NM OF COLD
OVERCAST GREATER THAN 90NM ACROSS YIELDS A DT OF 2.0. MET AND PT
YIELD 2.5. DBO PT.
I. ADDITIONAL POSITIONS: NONE
SWANSON

TXPS24 KNES 271949
TCSWSP
CCA
A. 21P (SERU)
B. 27/1730Z
C. 22.1S
D. 172.0E
E. THREE/HIMAWARI-9
F. T1.5/1.5
G. IR/EIR/SWIR/PRXY/ATMS
H. REMARKS...CORRECTED FOR POSITION AND INTENSITY BASED ON 1632Z SSMIS
DATA THAT SUGGESTED THE CENTER WAS FARTHER NE. SHEAR PATTERN RESULTS IN
A DT OF 2.0. MET AGREES WHILE PT IS 1.5. THE FT IS BASED ON THE PT DUE
TO UNCERTAINTY IN THE AMOUNT OF ACTIVE DEEP CONVECTION.
I. ADDL POSITIONS
27/1408Z 22.2S 171.5E ATMS
...TURK

TPPS13 PGTW 272121
A. TROPICAL CYCLONE 21P (SERU)
B. 27/2030Z
C. 23.12S
D. 172.35E
E. FIVE/HMWRI9
F. T2.0/2.5/W1.0/24HRS STT: W0.5/03HRS
G. IR/EIR
H. REMARKS: 71A/PBO XTRP/ANMTN. LLCC LOCATED WITHIN 75NM OF COLD
OVERCAST GREATER THAN 90NM ACROSS YIELDS A DT OF 2.0. MET YIELDS
2.5. PT YIELDS 2.0. DBO DT.
I. ADDITIONAL POSITIONS: NONE
SWANSON

TXPS43 PHFO 272331
TCSSP3
SOUTH PACIFIC TROPICAL CYCLONE SUMMARY - FIXES
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
2329 UTC THU FEB 27 2025
A. TROPICAL CYCLONE SERU (10F/21P)
B. 27/2300Z
C. 22.8S
D. 172.3E
E. HIMAWARI-9
F. T1.5/2.0/W1.5/24 HRS
G. VIS/IR/EIR
H. REMARKS...SHEAR PATTERN YIELDS DT OF 1.5. MET AND PT AGREE. FT
BASED ON DT BUT HELD AT 2.0 DUE TO CONSTRAINTS. THIS WILL BE THE
FINAL FIX ON THIS SYSTEM AS RSMC NADI DEEMED IT TO BE NON-
TROPICAL.
I. ADDL POSITIONS
NONE
$$

TPPS13 PGTW 280021
A. TROPICAL CYCLONE 21P (SERU)
B. 27/2330Z
C. 22.85S
D. 172.33E
E. FIVE/HMWRI9
F. T2.0/2.5/W0.5/24HRS STT: S0.0/03HRS
G. IR/EIR/VIS/MSI
H. REMARKS: 49A/PBO PTLY XPSD LLCC/ANMTN. LLCC LOCATED WITHIN 75NM
OF COLD OVERCAST GREATER THAN 90NM ACROSS YIELDS A DT OF 2.0. MET
AND PT AGREE. DBO DT.
I. ADDITIONAL POSITIONS: NONE
SWANSON

TXPS24 KNES 280056
TCSWSP
A. 21P (SERU)
B. 27/2330Z
C. 22.8S
D. 172.3E
E. THREE/HIMAWARI-9
F. T1.5/1.5
G. IR/EIR/VIS
H. REMARKS...CIRCULARLY DEFINED LLCC GREATER THAN 1.25 DEGREES FROM COLD
OVERCAST YIELDS A DT OF 1.5. THE MET AND PT ARE 1.5. THE FT IS BASED ON
THE MET BECAUSE THE CLOUD FEATURES ARE NOT CLEAR CUT.
I. ADDL POSITIONS
NIL
...GATLING

21P SERU 250228 0000 23.0S 172.5E SHEM 40 996

全球热带气旋监测公报
预报：渠鸿宇 签发：向纯怡 2025 年 02 月 28 日 10 时
“塞鲁”减弱为热带低压
时 间：22日14时（北京时）
海 域：南太平洋
命 名：“塞鲁”，SERU
变化过程：“塞鲁”已于今天凌晨减弱为热带低压
（这是关于“塞鲁”的最后一期监测公报）

Tropical Cyclone 21P (Seru) Warning #08 Final Warning
Issued at 28/0300Z

TPPS13 PGTW 280311
A. SUBTROPICAL STORM 21P (SERU)
B. 28/0230Z
C. 23.00S
D. 172.38E
E. THREE/HMWRI9
F. ST1.5/1.5
G. IR/EIR/VIS/MSI
H. REMARKS: 19A/PBO XPSD LLCC/ANMTN. SUBTROPICAL CYCLONE
CLASSIFICATION TECHNIQUE YIELDS ST1.5.
I. ADDITIONAL POSITIONS: NONE
NEVAREZ