Subject: Pacific-NW: Rmks/ [181400]

From: SIU Weather Processor <[email-masked]>
Date: Fri, 18 Jul 1997 09:50:44 -0500

803
WTPN21 PGTW 181400
SUBJ/TROPICAL CYCLONE FORMATION ALERT 181351Z JUL 97//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS
POSSIBLE WITHIN A 150 NM RADIUS OF 9.0N9 137.9E0 WITHIN
THE NEXT 12 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 181130Z INDICATES THAT A
CIRCULATION CENTER IS LOCATED NEAR 9.0N9 137.9E0.  THE
SYSTEM IS MOVING WEST-NORTHWESTWARD AT 02 KNOTS.
2. REMARKS:
A TROPICAL DISTURBANCE HAS FORMED IN THE EASTERN
PHILIPPINE SEA. THE DEEP CONVECTION ASSOCIATED WITH THIS
SYSTEM HAS INCREASED IN INTENSITY AND AREAL COVERAGE. AN
UPPER-LEVEL LOW TO THE NORTHEAST IS ENHANCING THE OUTFLOW
ABOVE THIS SYSTEM. WATER VAPOR SATELLITE IMAGERY

PAGE 03 RUHGSGG7870 UNCLAS
INDICATES THAT AN ANTICYCLONE IS FORMING ABOVE THIS
DISTURBANCE. ENVIRONMENTAL STEERING FLOW REMAINS WEAK;
THUS, THIS SYSTEM CONTINUES TO BE QUASISTATIONARY.
3. THIS ALERT VALID UNTIL 191400Z5.//
BT
#7870

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