000
AXPZ20 KNHC 051555
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON SEP 05 2011

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1530 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH PASSES THROUGH PANAMA NEAR 8N79W...ACROSS 
PANAMA AND COSTA RICA TO 15N105W 11N126W 12N140W. SCATTERED 
MODERATE TO ISOLATED STRONG CONVECTIVE PRECIPITATION IS FROM
4N TO 18N BETWEEN CENTRAL AMERICA AND 110W. ISOLATED MODERATE
CONVECTIVE PRECIPITATION IS FROM 10N TO 13N BETWEEN 110W AND
140W.

...DISCUSSION...

UPPER LEVEL CYCLONIC WIND FLOW COVERS THE CARIBBEAN SEA AND THE 
EASTERN PACIFIC OCEAN TO THE NORTH OF 10N BETWEEN 77W NEAR 
JAMAICA AND 92W IN THE EASTERN PACIFIC OCEAN. THIS FLOW SPANS 
THE AREA FROM SOUTHEASTERN MEXICO TO NORTHERN COSTA RICA...AND
A SMALL PART OF THE EASTERN PACIFIC OCEAN.

UPPER LEVEL ANTICYCLONIC WIND FLOW COVERS THE AREA THAT IS TO 
THE NORTH OF 20N BETWEEN MEXICO AND 123W.

UPPER LEVEL CYCLONIC FLOW MOVES INTO THE NORTHWESTERN CORNER OF 
THE AREA...TO THE NORTH OF 27N BETWEEN 125W AND 140W. 

A SURFACE TROUGH PASSES THROUGH 32N128W TO 27N123W. NO WEATHER 
OR WINDS ARE ASSOCIATED WITH THE TROUGH. BROKEN TO OVERCAST 
STRATOCUMULUS CLOUDS BLANKET THE AREA TO THE NORTH OF 15N TO THE 
WEST OF 115W.

BROAD AND COMPARATIVELY WEAK SURFACE ANTICYCLONIC WIND FLOW 
COVERS THE AREA THAT IS TO THE WEST OF THE 32N128W 27N123W 
TROUGH. THE SURFACE PRESSURE PATTERN IS COMPARATIVELY WEAK AND 
THE TRADE WINDS ARE BLOWING AT LESS THAN 20 KT ACROSS THE AREA. 
A SMALL BAND OF SOUTHWESTERLY WINDS CONTINUES FROM 8N TO 14N
BETWEEN 97W AND 103W. LONG PERIOD CROSS EQUATORIAL SWELL
CONTINUES TO DOMINATE THE AREA TO THE SOUTH OF 15N BETWEEN
90W AND 125W WITH SEA HEIGHTS RANGING FROM 8 TO 10 FT.

$$
MT