000
AXPZ20 KNHC 200945
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON AUG 20 2007

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 
0845 UTC.

...TROPICAL WAVE...

TROPICAL WAVE ALONG 94.5W HAS BEEN MOVING W AT 15 KT OVER THE 
PAST 48 HOURS. ONLY ISOLATED MODERATE CONVECTION IS NOTED WITHIN 
THE ITCZ NEAR THE WAVE AXIS.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG THE LINE...6N77W 9N105W 11N115W 
9N140W. NO SIGNIFICANT CONVECTION IS ALONG THE ITCZ.

...DISCUSSION...

RIDGE IS OVER THE AREA NORTH OF THE ITCZ FROM 105W TO 125W. THE 
AREA IS SOMEWHAT DIFLUENT ALOFT WITH PATCHY AREAS OF CLOUDS BUT 
LITTLE CONVECTION. THE REMAINDER OF THE AREA WEST OF 125W IS 
VERY DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS.

THE REMAINDER OF THE MIDDLE AND UPPER LEVELS IS ANALYZED AS A 
WEAK TROUGH.

SURFACE LOW IS LOCATED NEAR 23N117W AND HAS 1004 MB CENTRAL 
PRESSURE. THE LOW IS MOVING NORTHWEST 10 KT. LITTLE IN THE WAY 
OF WEATHER IS ASSOCIATED WITH THE SYSTEM.

BROKEN TO OVERCAST STRATOCUMULUS CLOUDS ARE NORTH OF A LINE FROM 
THE SOUTH TIP OF BAJA CALIFORNIA TO 15N1125W TO 15N140W.

WEAK RIDGE IS NORTH OF THE ITCZ WEST OF 125W. ELSEWHERE EXCEPT 
FOR THE ABOVE LOW PRESSURE THE AREA IS ANALYZED AS A WEAK TROUGH.

$$
LL