000
AXPZ20 KNHC 011007
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON SEP 01 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 0945 UTC.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 111W/112W FROM 08N-16N IS MOVING W ABOUT 5 
KT IN THE FACE OF A LARGE AREA OF LOW LEVEL WESTERLY FLOW 
ASSOCIATED WITH A LARGE AREA OF DISORGANIZED WEATHER ASSOCIATED 
WITH MONSOON TROUGH FEATURE WHICH HAS ESTABLISHED ITSELF OVER 
THE EASTERN PORTION OF THE DISCUSSION AREA SW OF MEXICO. HIGH 
RESOLUTION QUIKSCAT DATA FROM 0128 UTC INDICATED A WEAK AREA OF 
LOW PRESSURE 1006 MB NEAR 19N108W. 

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 13N89W TO 11N110W TO 09N130W TO 
08N140W. SCATTERED MODERATE TO STRONG WITHIN 60-90 NM OF THE 
ITCZ BETWEEN 90W AND 96W. SCATTERED MODERATE WITHIN 120 NM S OF 
THE ITCZ BETWEEN 98W AND 122W.

...DISCUSSION...

A RIDGE EXTENDS WSW FROM AN ANTICYCLONE CENTERED NEAR 24N106W 
WWD ALONG 20N/21N TO 132W. ASSOCIATED MODERATE TO STRONG 
SUBSIDENCE MAINTAINS VERY DRY AIR MASS N OF 14N W OF 112W...AND 
IS SUPPRESSING ANY DEEP CONVECTION FROM FORMING. MAIN MOISTURE 
AREA IS ASSOCIATED WITH THE ITCZ.

AT THE SURFACE...
RIDGE EXTENDS SE THROUGH 32N133W TO 24N120W. HIGH PRES COVERS 
THE AREA N OF 21N W OF 130W. THE ATTENDANT 1030 MB HIGH CENTER 
ANALYZED WELL N OF AREA NEAR 40N140W IS INTERACTING WITH LOW 
PRES OVER THE SW UNITED STATES TO PRODUCE N-NE WINDS OF 20-25 KT 
OVER THE N AND NW PORTIONS OF THE AREA WITH SEAS UP TO 12 FT IN 
NE SWELL. THESE CONDITIONS ARE FORECAST TO LAST THROUGH THE NEXT 
48 HOURS.

SW WIND FIELD S OF MONSOON TROUGH COMBINED WITH CROSS EQUATORIAL 
SWELLS ARE CAUSING 8-10 FT SEAS S OF 10N E OF 130W LIKELY 
LASTING THROUGH THE NEXT 2-3 DAYS BEFORE SUBSIDING. SOME OF 
THESE SWELLS MAY REACH THE CENTRAL AMERICAN COAST IN THE
8-9 FT RANGE.

$$
COBB