Subject: Pacific-NW: Subj/tropical Cyclone Formation Alert 180321z Nov 97//

From: SIU Weather Processor <[email-masked]>
Date: Mon, 17 Nov 1997 21:32:22 -0600

414
WTPN21 PGTW 180330
SUBJ/TROPICAL CYCLONE FORMATION ALERT 180321Z NOV 97//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS
POSSIBLE WITHIN 120 NM EITHER SIDE OF A LINE FROM 23.9N4
168.3E8 TO 20.2N4 163.4E4 WITHIN THE NEXT 06 TO 24 HOURS.
AVAILABLE DATA DOES NOT JUSTIFY ISSUANCE OF NUMBERED
TROPICAL CYCLONE WARNINGS AT THIS TIME. WINDS IN THE AREA
ARE ESTIMATED TO BE 15 TO 20 KNOTS. METSAT IMAGERY AT
180131Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 23.1N6 167.5E9. THE SYSTEM IS MOVING SOUTHWESTWARD
AT 08 KNOTS.
2. REMARKS:
LATEST VISUAL SATELLITE IMAGERY INDICATES THE AREA OF
CONVECTION LOCATED NEAR 23N5 168E5 HAS BECOME BETTER
ORGANIZED OVER THE PAST 12 HOURS. ANIMATED WATER VAPOR
IMAGERY INDICATES A WEAK ANTICYCLONE ALOFT AND AN
INCREASE IN CONVECTION NEAR THE LOW-LEVEL CENTER. THE
WIND SPEEDS ARE BASED ON A COMBINATION OF SATELLITE
DERIVED WIND INTENSITIES AND SURROUNDING SYNOPTIC DATA.
THE POTENTIAL FOR SIGNIFICANT TROPICAL CYCLONE
DEVELOPMENT WITHIN THE NEXT 24 IS GOOD.
3. THIS ALERT VALID UNTIL 190330Z6.//

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