000
AXPZ20 KNHC 042141
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2200 UTC SAT SEP 04 2010

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...SPECIAL FEATURES...
NONE.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS IS ALONG 07N78W TO 08N90W 
THEN RESUMES AT 13N110W TO 10N120W TO 11N140W. ISOLATED MODERATE 
CONVECTION IS WITHIN 90N OF AXIS E OF 90W. SIMILAR CONVECTION IS 
OFF THE COAST OF COLOMBIA S OF 06N E OF 81W. SCATTERED MODERATE 
CONVECTION IS FROM 10N TO 12N BETWEEN 122W AND 124W. SCATTERED 
MODERATE CONVECTION IS FROM 09N TO 13N W OF 137W.

...DISCUSSION...
ALOFT...AN ANTICYCLONE IS CENTERED S OF CALIFORNIA NEAR 31N120W 
WITH STRONG SUBSIDENCE. A RIDGE AXIS EXTENDS SW TO 20N140W. 
ELSEWHERE...MODERATE EAST WINDS PREVAIL OVER MOST OF THE 
REMAINDER OF THE DISCUSSION AREA. WATER VAPOR IMAGERY SHOWS 
SIGNIFICANT UPPER AIR MOISTURE S OF 24N E OF 125W TO COLOMBIA.

SURFACE... 
A WEAK RIDGE EXTENDS SE FROM 32N140W TO 27N127W WITH BROKEN TO 
OVERCAST LOW CLOUDS. A 1009 MB LOW REMNANTS OF T.D.10-E IS 
CENTERED S OF BAJA CALIFORNIA NEAR 22N113W PRODUCING SCATTERED 
SHOWERS ARE WITHIN 90 NM OF THE LOW CENTER. ELSEWHERE... 
SCATTERED MODERATE CONVECTION IS WITHIN 180 NM OF THE COAST OF 
MEXICO FROM THE GULF OF TEHUANTEPEC TO MAZATLAN. A 1008 MB LOW 
REMNANTS OF T.D.11-E IS INLAND OVER S MEXICO NEAR 18N95W 
PRODUCING SCATTERED MODERATE CONVECTION WITHIN 90 NM OF THE 
CENTER. SCATTEROMETER DATA ALSO SHOWS SOUTHERLY CROSS EQUATORIAL 
MONSOON FLOW BETWEEN 90W AND 110W FEEDING INTO S MEXICO. MODEL 
GUIDANCE INDICATES THE ITCZ WILL BECOME CONVECTIVELY ACTIVE OVER 
THE NEXT COUPLE OF DAYS WEST OF 110W WHILE THE STRONG SW MONSOON 
WINDS SUBSIDE EAST OF 110W.

$$
FORMOSA