000
AXPZ20 KNHC 302123
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON JUL 30 2007

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.

...TROPICAL WAVES...

A TROPICAL WAVE IS ALONG 99W N OF 4N MOVING W 15 KT. WEAK 
CYCLONIC TURNING IS NOTED ALONG THE WAVE AT 9N. CONVECTION HAS 
DIMINISHED.

LOW 12N120W 1008 MB IS ASSOCIATED WITH A TROPICAL WAVE ALONG 
120W FROM 5N TO 19N MOVING W 12 KT. SCATTERED MODERATE WITH 
ISOLATED STRONG CONVECTION IS OBSERVED WITHIN 120 NM OVER THE 
WEST SEMICIRCLE OF THE LOW. UPPER LEVEL EASTERLY SHEAR IS 
EXPECTED TO CONTINUE SUPPRESSING FURTHER DEVELOPMENT.

...ITCZ...

ITCZ AXIS IS ALONG THE LINE...7N77W 7N90W 12N110W 12N120W 
11N130W 8N140W.
SCATTERED MODERATE CONVECTION IS WITHIN 75 NM OF THE POINT 
7.3N90W. SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION IS 
WITHIN 90 NM OF THE POINT 9.3N97W. NUMEROUS MODERATE WITH 
SCATTERED STRONG CONVECTION IS WITHIN THE AREA FROM 9N TO 11.5N 
FROM 103W TO 109W. SCATTERED MODERATE TO STRONG CONVECTION IS 
WITHIN 75 NM OF THE POINT 11.8N111.6W.

...DISCUSSION...

UPPER LEVEL TROUGH ALONG LINE 32N123W TO 15N140W. NO WEATHER OR 
CLOUDS ARE ASSOCIATED WITH THE SYSTEM. DRY AIR IS OBSERVED IN 
THE LOWER AND MIDDLE LEVELS NW OF THE AXIS AND 300 NM SE OF AXIS.

MIDDLE AND UPPER TROUGH IS NORTH OF 15N FROM 108W TO 115W. THIS 
AREA ALSO HAS NO ASSOCIATED WEATHER OR CLOUDS AND IS DRY IN THE 
MIDDLE AND UPPER LEVELS.

ELSEWHERE WEAK ANTICYCLONIC FLOW PREVAILS. 

WEAK SURFACE RIDGE IS NORTH OF THE ITCZ WEST OF 125W.  ELSEWHERE 
WEAK TROUGH IS OBSERVED.

$$
LL