NHC Graphical Outlook Archive

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Graphical TWO epac

ZCZC MIATWOEP ALL
TTAA00 KNHC DDHHMM
TROPICAL WEATHER OUTLOOK
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1100 PM PDT FRI AUG 21 2009

FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE..

1. AN AREA OF LOW PRESSURE CENTERED ABOUT 1350 MILES EAST-SOUTHEAST OF
THE HAWAIIAN ISLANDS IS MOVING WESTWARD AT ABOUT 10 MPH. THIS
SYSTEM HAS BECOME BETTER-ORGANIZED THIS EVENING AND A TROPICAL
DEPRESSION APPEARS TO BE FORMING. IF THIS TREND
CONTINUES...ADVISORIES WILL BE INITIATED TONIGHT. THERE IS A HIGH
CHANCE...GREATER THAN 50 PERCENT...OF THIS SYSTEM BECOMING A
TROPICAL CYCLONE DURING THE NEXT 48 HOURS.

2. A BROAD AREA OF LOW PRESSURE CENTERED ABOUT 1070 MILES SOUTHWEST OF
THE SOUTHERN TIP OF BAJA CALIFORNIA HAS CHANGED LITTLE IN
ORGANIZATION. DEVELOPMENT...IF ANY...OF THIS SYSTEM IS EXPECTED TO
BE SLOW TO OCCUR AS IT MOVES SLOWLY WESTWARD. THERE IS A LOW
CHANCE...LESS THAN 30 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL
CYCLONE DURING THE NEXT 48 HOURS.

3. A LARGE AREA OF DISORGANIZED SHOWERS AND THUNDERSTORMS ASSOCIATED
WITH A TROPICAL WAVE IS LOCATED ABOUT 560 MILES SOUTH-SOUTHWEST OF
MANZANILLO MEXICO. SOME SLOW DEVELOPMENT OF THIS SYSTEM IS POSSIBLE
DURING THE NEXT COUPLE DAYS AS IT MOVES TOWARD THE WEST-NORTHWEST
AT 10 TO 15 MPH. THERE IS A LOW CHANCE...LESS THAN 30 PERCENT...OF
THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS.

ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE
NEXT 48 HOURS. 

$$
FORECASTER ROBERTS/BEVEN
NNNN

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