000
AXPZ20 KNHC 132207
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED JUN 13 2007

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2145 UTC.

...TROPICAL WAVES..

A TROPICAL WAVE IS N OF 3N ALONG 85W AND HAS BEEN MOVING W ABOUT 
12 KT OVER THE PAST 24 HOURS. ONLY A SLIGHT ENHANCEMENT OF 
CONVECTION WAS NOTED ALONG THE ITCZ BETWEEN 86W AND 79W AND IS 
DECREASING IN COVERAGE AND INTENSITY AT THE MOMENT. HOWEVER 
TSTMS ARE INCREASING OVER EASTERN NICARAGUA PERHAPS ENHANCED BY 
BY LOCAL SEA BREEZE.

A TROPICAL WAVE ALONG 101W HAS MOVED W ABOUT 12 KT THE PAST 24 
HOURS. CURRENTLY TSTMS ARE ENHANCED ALONG THE ITCZ AT 8N BUT  
MOSTLY TOWERING CUMULUS IS NOTED ALONG THE AXIS N OF 10N TO THE 
COAST OF OLD MEXICO.

A TROPICAL WAVE ALONG 112W HAS MOVED W 10 KT THE PAST 24 HOURS. 
A CLUSTER OF TSTMS IS CURRENTLY ACCOMPANYING THE WAVE ALONG THE 
ITCZ AT 7N.

..ITCZ...

INTERTROPICAL CONVERGENCE ZONE...AXIS 9N84W 12N99W 5N110W 8N114W 
7N140W. SCATTERED MODERATE CONVECTION IS NOTED WITHIN 60 NM 
EITHER SIDE OF LINE 6N79W 6N85W. SCATTERED MODERATE ISOLATED 
STRONG IS OBSERVED WITHIN 60 NM OF 8N100W AND 12N104W AND 6N110W 
AND 10N120W.

...DISCUSSION...

AN UPPER LEVEL TROUGH IS LOSING IDENTITY ALONG 32N102W 23N120W 
13N132W THEN S OF THE EQUATOR INTO A CYCLONE NEAR 2S125W. AN 
UPPER LEVEL ANTICYCLONE CONTINUES TO DRIFT W AND IS CURRENTLY 
NEAR 29N140W WITH A RIDGE EXTENDING E TO NEAR 27N120W. A LOW 
LEVEL RIDGE EXTENDS ALONG 32N138W TO 15N120W. THESE SYSTEMS 
COMBINE TO ADVECT DRY UPPER AIR OVER MOST OF THE DISCUSSION AREA 
N OF 10N W OF 127W AND N OF 22N E OF 127W. ANOTHER UPPER 
ANTICYCLONE IS W OF THE DISCUSSION AREA NEAR 11N146W WITH A 
RIDGE EXTENDING N TO A CREST AT 23N148W. PLENTY OF DEBRIS 
MOISTURE FROM ITCZ CONVECTION W OF AREA IS TRAPPED UNDER THE 
UPPER RIDGE WITH ONLY A TRACE SPILLING SE INTO THE DISCUSSION 
AREA S OF 7N W OF 136W.

AN UPPER ANTICYCLONE OVER S TEXAS NEAR 27N97W HAS A RIDGE 
EXTENDING SW TO THE SOUTHERN TIP OF THE BAJA PENINSULA. THE 
REMNANTS OF A MOISTURE ARE STILL EVIDENT WITHIN 90 NM EITHER 
SIDE OF LINE 23N107W 28N100W TO 32N94W. 

AN UPPER TROUGH EXTENDS SW FROM AU UPPER CYCLONE AT 21N91W TO 
ANOTHER CYCLONE AT 15N107W.  AN UPPER ANTICYCLONE IS NEAR 10N76W 
HAS A RIDGE EXTENDING W TO A CREST AT 13N98W WITH UPPER 
DIFFLUENCE ENHANCING THE ITCZ E OF 106W. THE RESULTANT DEBRIS 
MOISTURE IS ADVECTED NE OVER CENTRAL AMERICA.
    
$$
FORECASTER NELSON