000
AXPZ20 KNHC 201538
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON AUG 20 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 
1515 UTC.

...TROPICAL WAVE...

TROPICAL WAVE IS ALONG 95W/96W SOUTH OF 18N MOVING WEST NEAR 15 
KT. SCATTERED MODERATE CONVECTION IS NOTED WITHIN THE ITCZ NEAR 
THE WAVE AXIS. SCATTERED SHOWERS ARE OVER THE GULF OF 
TEHUANTEPEC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 10N84W 7N104W 15N112W 11N124W  
11N140W.  SCATTERED MODERATE ISOLATED STRONG E OF 86W AND FROM 
91W TO 110W. 

...DISCUSSION...

RIDGE IS OVER THE AREA NORTH OF THE ITCZ FROM 105W TO 130W. THE 
AREA IS SOMEWHAT DIFFLUENT ALOFT WITH PATCHY AREAS OF CLOUDS BUT 
LITTLE CONVECTION. THE REMAINDER OF THE AREA WEST OF 130W IS 
VERY DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS. A WEAK 
TROUGH IS ANALYZED ALONG 137W. THE UPPER FLOW IS NE OVER THE 
DEEP TROPICAL EPAC S OF 10N.

A WEAK 1007 MB SURFACE LOW IS LOCATED NEAR 23N118W. THE LOW IS 
MOVING NORTHWEST 10 KT. LITTLE IN THE WAY OF WEATHER IS 
ASSOCIATED WITH THE SYSTEM. BROKEN TO OVERCAST STRATOCUMULUS 
CLOUDS ARE MAINLY NORTH OF 16N. WEAK RIDGE IS NORTH OF THE ITCZ 
WEST OF 125W PRODUCING LIGHT TO MODERATE TRADE WINDS. 

GAP WINDS...WINDS MAY INCREASE ACROSS THE GULF OF TEHUANTEPEC AS 
HURRICANE DEAN MOVES INTO THE SW GULF OF MEXICO THIS EVENING AND 
TONIGHT.

$$
GR