000
AXPZ20 KNHC 201527
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED JUN 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 
1500 UTC.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 90W N OF 4N MOVING W 10 KT. NO READILY 
APPARENT SIGNATURE OF THIS WAVE IS NOTED IN SATELLITE IMAGERY. 
SOME DEEP CONVECTION LIES ALONG THE ITCZ W OF THE WAVE AXIS.

TROPICAL WAVE ALONG 103W FROM 4N TO 17N MOVING W 10-15 KT. A 
SLIGHT INVERTED-V SIGNATURE IS NOTED STRETCHING N TOWARDS THE 
MEXICAN COAST...BUT OTHERWISE STRONG ELY SHEAR HAS DISPLACED ALL 
CLOUDINESS W OF THE AXIS. DEEP CONVECTION IS WEST OF THE AXIS 
WITHIN THE ITCZ.

TROPICAL WAVE ALONG 122W FROM 3N TO 16N MOVING W 15 KT. ALTHOUGH 
THERE IS NO DEEP CONVECTION...INFRARED SATELLITE IMAGERY SHOWS 
AT LEAST A MID-LEVEL CIRCULATION.  SCATTERED SHOWERS/ISOLATED 
TSTMS FROM 11N TO 12N FROM 120W TO 122W.  THE CONVECTION DOES 
NOT SHOW ANY SIGNS OF BECOMING ORGANIZED.

TROPICAL WAVE ALONG 134W FROM 2N TO 15N MOVING W 10-15 KT. NO 
OBVIOUS SIGNATURE NOTED WITH THIS WAVE. 

..ITCZ...

ITCZ AXIS IS CENTERED ALONG THE LINE...6N77W 7N95W 7N140W. 
SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 75 NM OF THE 
POINT 5.8N78W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 
THE AREA N OF 5N FROM 80W TO 85W. SCATTERED MODERATE WITH 
ISOLATED STRONG CONVECTION IS WITHIN 60 NM OF THE POINT 
6.5N105.7W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 75 
NM EITHER SIDE OF THE ITCZ AXIS WEST OF 132W.

.DISCUSSION...

MIDDLE AND UPPER LAYER TROUGH IS NORTHWEST OF A LINE THROUGH 
32N126W 22N140W. THERE IS NO WEATHER ASSOCIATED WITH THIS SYSTEM 
AND SKIES ARE CLEAR AND DRY IN THE MIDDLE AND UPPER LEVELS WITH 
OVERCAST STRATOCUMULUS IN THE LOWER LEVELS.

ELSEWHERE NORTH OF 15N WEAK RIDGE IS OVER THE AREA. THIS AREA 
ALSO HAS NO WEATHER ASSOCIATED WITH THE SYSTEM AND SKIES ARE 
CLEAR AND DRY IN THE MIDDLE AND UPPER LEVELS WITH OVERCAST 
STRATOCUMULUS IN THE LOWER LEVELS.

SOUTH OF 15N BROAD TROUGH IS OVER THE AREA. E OF 130W THE AREA 
IS SOMEWHAT DIFFLUENT IN THE UPPER LEVELS WITH MOISTURE IN THE 
MIDDLE AND UPPER LEVELS. AREAS OF MULTI LEVEL CLOUDS ARE 
OBSERVED HOWEVER THE DOMINANT SKY CONDITION IN THIS AREA IS 
CLEAR.  WIDELY SCATTERED AREAS OF CONVECTION ARE ALSO WITHIN 
THIS AREA.

WEAK SURFACE RIDGE IS NORTH OF 18N WEST OF 113W.  ELSEWHERE 
BROAD TROUGH IS ANALYZED.

$$
LL