000
AXPZ20 KNHC 130339
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON AUG 13 2007

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0330 UTC.

...TROPICAL WAVES...
TROPICAL WAVE ALONG 88W N OF 5N MOVING W 15 KT.  SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 90 NM W OF WAVE AXIS MOSTLY 
OVER MOUNTAINS OF GUATEMALA.

TROPICAL WAVE ALONG 96W MOVING W 10 TO 15 KT. SCATTERED MODERATE 
CONVECTION WITHIN 120-180 NM OF WAVE AXIS AND INTERSECTION OF 
ITCZ. 

TROPICAL WAVE ALONG 106W MOVING W AT 10 KT HAS 1009 MB LOW PRES 
AT 13N ASSOCIATED WITH IT.  SCATTERED MODERATE TO STRONG 
CONVECTION WITHIN 90 NM OF ITCZ WITHIN 180 NM OF AXIS FROM
11N TO 15N.  UPPER LEVEL ENVIRONMENT NOT FAVORABLE AND NO  
DEVELOPMENT IS EXPECTED AT THIS TIME.  

TROPICAL WAVE ALONG 128W MOVING W AT 15 KT HAS ENTERED VERY DRY 
AIR MASS AND ONLY MINOR ISOLATED MODERATE CONVECTION REMAINS 
WITHIN 90 NM OF AXIS S OF ITCZ.

...ITCZ...
ITCZ AXIS ALONG 13N89W  13N106W  12N112W  14N123W  11N134W  
12N140W.  SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 
120 NM N OF AXIS E OF 95 AND FROM 101W TO 110W.  SCATTERED 
MODERATE CONVECTION WITHIN 60 NM OF AXIS FROM 112W TO 116W. 

...DISCUSSION...
BROAD MID TO UPPER LEVEL TROUGH WITH AXIS FROM 32N138W TO 
24N140W KEEPS AIR MASS N OF 12N W OF 123W VERY DRY...NOT EVEN 
ITCZ IS ABLE TO DEVELOP ANY CONVECTION UNDER THESE CONDITIONS.  
NARROW TILTED MID TO UPPER LEVEL RIDGE EXTENDED FROM W COAST 
U.S. SW INTO DISCUSSION AREA ALONG 32N125W TO 17N140W.  
ANTICYCLONE CENTER AT 22N96W AND CYCLONIC VORTEX AT 25N86W HAVE 
SWATH OF MOIST FLOW CROSSING YUCATAN PENINSULA INTO E PAC 
FEEDING ARRAY OF TROPICAL WAVES E OF 106W.    

AT THE SURFACE...
HIGH PRES CENTER WELL NW OF AREA HAS RIDGE EXTEND SE TO 20N110W. 
NEW RIDGE DEVELOPING NEAR 32N129W HAS KEPT NE TRADES LIGHT. 

$$
WALLY BARNES