000
AXPZ20 KNHC 240916
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI JUL 24 2009

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...TROPICAL WAVES...
TROPICAL N OF 3N ALONG 81W TO THE COAST OF PANAMA. STRONG
CONVECTION IS N OF 6N E OF 80W.
  
TROPICAL WAVE N OF 2N ALONG 95W/96W TO THE GULF OF TEHUANTEPEC. 
STRONG CONVECTION IS WITHIN 140 NM OF THE COAST OF GULF OF 
TEHUANTEPEC. SCATTERED MODERATE CONVECTION WITH THE WAVE IS 
MAINLY ALONG THE ITCZ.
   
TROPICAL WAVE FROM 3N-14N ALONG 107W MOVING W 15-20 KT. 
SCATTERED SHOWERS ARE WITHIN 120 NM W OF THE WAVE.

TROPICAL WAVE FROM 4N-18N ALONG 130W/131W MOVING W 15 KT. 
ISOLATED SHOWERS ARE ALONG THE WAVE.

...ITCZ...
AXIS IS ALONG 6N78W 8N95W 6N105W 9N130W 9N140W. NUMEROUS STRONG 
CONVECTION N OF 06N E OF 80W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION WITHIN 180 NM S OF AXIS FROM 94W-100W.  

...DISCUSSION...
AN UPPER LEVEL TROPICAL ANTICYCLONIC CIRCULATION IS CENTERED 
NEAR 11N136W WITH AN UPPER RIDGE EXTENDING NE TO 29N125W.
MID/UPPER LEVEL MOISTURE IS FLOWING NE BETWEEN THE ANTICYCLONIC
CIRCULATION AND A CYCLONIC CIRCULATION NW OF THE AREA. UPPER 
LEVEL TROUGH IS E OF THE RIDGE WITH AXIS FROM 30N123W TO A 
CYCLONIC CIRCULATION IN THE DEEP TROPICS NEAR 7N107W. MODERATE 
SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS 
WITHIN THE TROUGH.

AN UPPER ANTICYCLONIC CIRCULATION IS CENTERED OVER EXTREME 
NORTHERN MEXICO ALONG THE BORDER OF SW NEW MEXICO AT 31N108W.  
ANOTHER UPPER ANTICYCLONIC CIRCULATION IS CENTERED OVER SOUTHERN 
MEXICO NEAR THE BAY OF CAMPECHE AT 18N95W. UPPER LEVEL DIFFLUENT
FLOW ASSOCIATED WITH THE ANTICYCLONIC CIRCULATION IS ENHANCING
CONVECTIVE ACTIVITY OVER SOUTHERN MEXICO...CENTRAL AMERICA AND
ADJACENT COASTAL WATERS. 
 
SURFACE RIDGE EXTENDS FROM 32N132W TO 15N110W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS BLANKET THE AREA N OF 22N W OF 
120W LARGE SW SWELLS FROM THE SOUTHERN HEMISPHERE ARE CROSSING 
THE EQUATOR COVERING MUCH OF THE AREA S OF 15N.

$$
DGS