000
AXPZ20 KNHC 281514
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED JUL 28 2010

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...

ITCZ AXIS ALONG 10N85W TO 09N92W TO 11N100W TO 09N115W TO 
09N130W TO 10N140W. SCATTERED MODERATE TO STRONG CONVECTION IS 
LOCATED WITHIN A 120 NM RADIUS OF 08N89W AND ALSO FROM 08N TO 
12N BETWEEN 95W AND 99W. 

...DISCUSSION...

W OF 105W...
THE SOUTHERN END OF A BROAD MIDDLE/UPPER LEVEL TROUGH OFF THE W 
COAST OF THE UNITED STATES EXTENDS SOUTHWARD TO 28N BETWEEN 120W 
AND 140W WITH THE AXIS ALONG 132W. RIDGING ALOFT COVERS THE 
REMAINDER OF THE AREA N OF ABOUT 20N E OF 130W INTO MEXICO WITH 
THE AXIS EXTENDING THROUGH CENTRAL BAJA CALIFORNIA TO NEAR 
22N130W. THE RIDGE IS FORECAST TO EXTEND WESTWARD TO 135W OVER 
THE NEXT 48 HOURS AS THE TROUGH MENTIONED ABOVE SHIFTS 
NORTHWARD. WATER VAPOR IMAGERY INDICATES STRONG SUBSIDENCE N OF 
ABOUT 18N BETWEEN 115W AND 140W. MODERATE EASTERLY WINDS ALOFT 
ARE LOCATED S OF 20N TO THE EQUATOR BETWEEN 105W AND 130W WITH 
SATELLITE DERIVED WINDS INDICATING SPEEDS OF 30 TO 40 KNOTS. AT 
THE SURFACE A BROAD RIDGE IS LOCATED OVER THE SUBTROPICS N OF 
18N W OF 112W. A SURFACE TROUGH IS LOCATED ALONG 134W FROM 08N 
TO 12N. SOUTHERLY SWELLS FROM 8 TO 10 FEET ARE LOCATED OVER THE 
TROPICS S OF ABOUT 12N TO THE EQUATOR.

E OF 105W...
MODERATE EASTERLY TO NORTHEASTERLY WINDS ALOFT COVER THE EASTERN 
PART OF THE DISCUSSION AREA WITH SATELLITE DERIVED WINDS 
INDICATING SPEEDS AS HIGH AS 45 KNOTS. WINDS WILL WEAKEN 
SLIGHTLY OVER THE NEXT TWO DAYS. OUTSIDE OF THE ITCZ SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS LOCATED N OF 05N WITHIN 
180 NM OF THE COAST OF COLOMBIA. SCATTERED MODERATE TO STRONG 
CONVECTION IS LOCATED WITHIN A 90 NM RADIUS OF 13N94W AND FROM 
14N TO 18N BETWEEN 100W AND 107W.

$$
CAB