白令海炸彈低壓，最低944hPa (不斷更新) - 颱風討論

（注意，以下時間為UTC+8）

2017年1月23日08時 JMA天氣圖：http://i.imgur.com/8Hg4CRZ.png
2017年1月23日08時 OPC天氣圖：http://i.imgur.com/mqdCTLf.png
2017年1月22日23時30分 紅外線雲圖：http://i.imgur.com/3qVZ0ZL.jpg
2017年1月23日08時 紅外線雲圖：http://i.imgur.com/pCNrMM1.png

WWJP25 RJTD 230000
WARNING AND SUMMARY 230000.
WARNING VALID 240000.
WARNING IS UPDATED EVERY 6 HOURS.
STORM WARNING.
DEVELOPING LOW 944 HPA
AT 51N 178W SEA AROUND ALEUTIANS MOVING EASTNORTHEAST 20 KNOTS.
OCCLUDED FRONT FROM 51N 178W TO 53N 172W 52N 168W.
WARM FRONT FROM 52N 168W TO 48N 160W 44N 154W.
COLD FRONT FROM 52N 168W TO 50N 165W 46N 164W 39N 167W 32N 173W 27N
180E 26N 179E.
WINDS 30 TO 55 KNOTS WITHIN 1400 MILES OF LOW SOUTH SEMICIRCLE AND
700 MILES ELSEWHERE.
FORECAST POSITION FOR 231200UTC AT 52N 174W WITH UNCERTAINTY OF 85
MILES RADIUS.
FORECAST POSITION FOR 240000UTC AT 52N 164W WITH UNCERTAINTY OF 130
MILES RADIUS

PAN PAN

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT
TO 50N 160E

SYNOPSIS VALID 1800 UTC JAN 22.
24 HOUR FORECAST VALID 1800 UTC JAN 23.
48 HOUR FORECAST VALID 1800 UTC JAN 24.

──────────────────────────────────────

...HURRICANE FORCE WIND WARNING...

.LOW 51N179W 941 MB MOVING E 20 KT. FRONT EXTENDS FROM 52N180W TO 53N172W TO
50N162W TO 40N167W TO 30N176W. BETWEEN 60 NM AND
300 NM W SEMICIRCLE...WITHIN 180 NM N OF FRONT W OF 168W AND

FROM 39N TO 47N BETWEEN 177W AND 174E WINDS 50 TO 65 KT. SEAS 27 TO 40 FT.
ALSO WITHIN 720 NM S QUADRANT AND 420 NM NW SEMICIRCLE
AND WITHIN 300 NM N AND NE OF FRONT N OF 51N WINDS 40 TO 55 KT.
SEAS 18 TO 34 FT...HIGHEST S OF LOW. ELSEWHERE WITHIN 660 NM NW
SEMICIRCLE...1080 NM S AND 840 NM E QUADRANTS AND WITHIN 300 NM
NE AND E OF FRONT FROM 33N TO 51N WINDS 30 TO 45 KT. SEAS 10 TO
29 FT...HIGHEST IN S QUADRANT.
.24 HOUR FORECAST LOW 51N166W 959 MB. FRONT TO EXTEND FROM
58N155W TO 56N149W TO 52N148W TO 30N158W. FROM 42N TO 49N
BETWEEN 160W AND 170W AND BETWEEN 120 NM AND 360 NM SW QUADRANT
WINDS 40 TO 55 KT. SEAS 32 TO 49 FT. ELSEWHERE N OF A LINE FROM
35N155W TO 39N170W TO 48N178W AND S OF 51N...WITHIN 540 NM W
QUADRANT AND BETWEEN 360 NM AND 660 NM N QUADRANT AND WITHIN 240
NM NE AND E OF FRONT N OF 34N WINDS 25 TO 40 KT. SEAS 16 TO 34
FT...EXCEPT IN BERING SEA AND NE AND E OF FRONT 9 TO 21 FT.
.48 HOUR FORECAST LOW 55N155W 974 MB. FRONT TO EXTEND FROM
60N142W TO 49N138W TO 35N140W. WITHIN 420 NM S AND SE QUADRANTS
AND WITHIN 180 NM E OF THE FRONT N OF 52N WINDS 25 TO 40 KT.
SEAS 17 TO 30 FT...EXCEPT E OF FRONT 12 TO 23 FT.

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這隻炸彈低壓從22日02時之976hPa，爆跌至23日02時之944hPa，
24小時相差32hPa，達至「炸彈低壓」定義門檻。

進入白令海之後，該溫帶氣旋穩定增強，目前進入強度巔峰。

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