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615 
ABPZ30 KNHC 011436
TWSEP 
MONTHLY TROPICAL WEATHER SUMMARY
NATIONAL WEATHER SERVICE MIAMI FL
8 AM PDT FRI OCT 1 1999
 
FOR THE NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE...

...SUMMARY OF TROPICAL CYCLONE ACTIVITY DURING SEPTEMBER...

DURING THE MONTH OF SEPTEMBER...TWO TROPICAL CYCLONES FORMED IN 
THE EASTERN PACIFIC...HURRICANES GREG AND HILARY. 
 
GREG FORMED ON 5 SEPTEMBER ABOUT 50 MILES SOUTHWEST OF MANZANILLO
MEXICO...STRENGTHENED INTO A TROPICAL STORM LATER THAT DAY...AND
REACHED HURRICANE INTENSITY LATE ON THE 6TH WHILE LOCATED ABOUT 85
MILES SOUTHEAST OF CABO SAN LUCAS MEXICO. GREG MOVED ON A GENERAL
NORTHWESTWARD TRACK FOR THE NEXT FEW DAYS JUST OFF THE WEST COAST
OF MEXICO AND PRODUCED TORRENTIAL RAINS WHICH RESULTED IN NINE
DEATHS IN MAINLAND MEXICO.  THE HURRICANE THREATENED THE SOUTHERN
PORTION OF BAJA CALIFORNIA ON 6 SEPTEMBER.  BY THE 7TH...EASTERLY
SHEAR WEAKENED GREG TO A TROPICAL STORM AS IT PASSED VERY NEAR CABO
SAN LUCAS THAT AFTERNOON. THE SYSTEM MOVED WEST-NORTHWESTWARD AWAY
FROM THE BAJA PENINSULA LATE ON THE 7TH AND WEAKEN TO A DEPRESSION
ON THE 8TH AS IT ENCOUNTERED COOLER WATERS.  THE SYSTEM DISSIPATED
ON THE 10TH A FEW HUNDRED MILES WEST OF THE SOUTHERN TIP OF BAJA
CALIFORNIA.

HILARY FORMED ON THE 17TH ABOUT 485 MILES SOUTH OF THE SOUTHERN
TIP OF BAJA CALIFORNIA.  THE SYSTEM MOVED WEST-NORTHWESTWARD AND
BECAME A TROPICAL STORM ON THE 18TH.  HILARY TURNED TO A GENERAL
NORTH-NORTHWEST HEADING LATE ON THE 18TH...AND REACHED HURRICANE
STRENGTH DURING THE AFTERNOON OF THE 19TH WHILE LOCATED ABOUT 275
MILES SOUTH-SOUTHWEST OF THE SOUTHERN TIP OF BAJA CALIFORNIA. BY
THE MORNING OF THE 20TH HILARY BEGAN TO WEAKEN AS IT MOVED OVER
COOLER WATERS...AND DISSIPATED ON THE 22ND ABOUT 100 MILES SOUTH 
OF PUNTA EUGENIA MEXICO ON THE BAJA PENINSULA.  

                             SUMMARY TABLE

                                           MAXIMUM WIND
      NAME                 DATES             (KNOTS)        DEATHS
     -------           ---------------    -------------     -------
     GREG               5 SEP -  9 SEP          65             0 
     HILARY            17 SEP - 22 SEP          65             9* 

* - MEDIA-BASED ESTIMATE 

GUINEY/LAWRENCE/PASCH/FRANKLIN