000
AXPZ20 KNHC 101515
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE JUL 10 2007

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 
1200 UTC.

...SPECIAL FEATURE...
TROPICAL DEPRESSION FOUR-E 1006 MB AT 18.6N 120.8W AT 1500 UTC 
MOVING NW AT 7 KT.  MAXIMUM SUSTAINED WINDS 30 WITH GUSTS TO 40 
KT. NUMEROUS STRONG CONVECTION IS LOCATED WITHIN 150 NM N 
SEMICIRCLE OF T.D. FOUR-E. A THE T.D. APPROACHES DRIER AIR MASS 
AND COOLER SEA SURFACE TEMPERATURES IT SHOULD SLOWLY WEAKEN.

...TROPICAL WAVES...
TROPICAL WAVE N OF 6N ALONG 93W MOVING W 15 KT. SCATTERED 
MODERATE CONVECTION IS IN THE GULF OF TEHUANTEPEC WITH 
ISOLATED CONVECTION ALONG THE WAVE FROM 9N-13N.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE...8N79W 12N105W 15N110W 10N140W. 
SCATTERED MODERATE TO ISOLATED STRONG FROM 3N TO 7N E OF 79W AND 
WITHIN 150 NM OF S AXIS FROM 99N TO 103W AND WITHIN 90 NM S OF 
AXIS FROM 119W TO 124W. NUMEROUS STRONG FROM 8N TO 12N BETWEEN 
108W AND 114W.

...DISCUSSION...
BROAD UPPER LEVEL ANTICYCLONIC CIRCULATION CENTERED NEAR 16N131W
WITH RIDGE EXTENDING N OT 32N133W. ANTICYCLONIC FLOW COVERS THE 
AREA W OF 125W. SUBSIDENCE WITH ASSOCIATED DRY AIR ALOFT IS FROM 
THE ITCZ TO 23N W OF 124W. NEGATIVELY TILTED UPPER LEVEL TROUGH 
HAS AXIS FROM 32N125W INTO THE CENTRAL BAJA PENINSULA NEAR 
27N114W. DOWNSTREAM ANTICYCLONIC CIRCULATION AT OVER MEXICO
NEAR 26N104W WITH RIDGE EXTENDING SW TO 19N116W...ANOTHER RIDGE 
EXTENDS SOUTHWARD ACROSS MEXICO INTO THE PACIFIC TO NEAR 12N97W.
AN UPPER LEVEL INVERTED TROUGH EXTENDS FROM NEAR PUERTO VALLARTA 
TO 11N108W.

A SURFACE TROUGH IS ANALYZED ALONG THE ITCZ FROM 16N107W TO 
8N110W. A LARGE AREA OF TSTMS IS FROM 8N-12N BETWEEN 108W-114W.
HIGH PRES RIDGE ENTERS THE AREA NEAR 32N140W TO 21N110W. BROKEN 
TO OVERCAST STRATUS AND STRATOCUMULUS CLOUDS WITHIN THE RIDGE N 
OF 15N W OF 124W AND N OF 20N W OF 115W. TROPICAL DEPRESSION 
FOUR-E IS ENTERING THIS AREA OF STRATUS CLOUDS.

$$
DGS