000 AXPZ20 KNHC 200917 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC WED JUN 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 0900 UTC. ...TROPICAL WAVES... TROPICAL WAVE ALONG 89W 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 102W S OF 16N 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 ESSENTIALLY NON-EXISTENT. TROPICAL WAVE ALONG 120W/121W S OF 15N MOVING W 15 KT. ALTHOUGH THERE IS NO DEEP CONVECTION...INFRARED SATELLITE IMAGERY SHOWS AT LEAST A WELL-DEFINED MID-LEVEL CIRCULATION WITH THE WAVE AXIS SLOPING SW TO NE. WIDELY SCATTERED SHOWERS/ISOLATED TSTMS FROM 7N-14N BETWEEN 115W-125W. TROPICAL WAVE ALONG 132W S OF 13N MOVING W 10-15 KT. NO OBVIOUS SIGNATURE NOTED WITH THIS WAVE. ..ITCZ... ITCZ AXIS IS CENTERED ALONG 7N77W 10N85W 8N100W 11N118W 7N132W 8N140W. NUMEROUS STRONG CONVECTION N OF 5N E OF 83W EXTENDING ACROSS PANAMA. SCATTERED MODERATE WITHIN 90 NM OF AXIS BETWEEN 91W-110W. SCATTERED MODERATE/ISOLATED STRONG WITHIN 60 NM OF AXIS W OF 129W. ...DISCUSSION... E OF 110W... DEEP EASTERLY FLOW REMAINS IN CONTROL FROM CENTRAL AMERICA WWD COURTESY OF AN UPPER LEVEL HIGH CENTERED NEAR MEXICO CITY...AND A STRONGER MID-LEVEL HIGH PLANTED OVER NEW MEXICO. A FEW TROPICAL WAVE ARE EMBEDDED WITHIN THIS FLOW BUT QUIKSCAT SHOWS THAT SURFACE WINDS ARE QUITE LIGHT...GENERALLY 10 KT OR LESS EXCEPT A LITTLE STRONGER DOWNWIND OF THE GULF OF PAPAGAYO. AN UPPER TROUGH STRETCHING FROM ERN CUBA TO NICARAGUA IS PRODUCING AN AREA OF STRONG DIFFLUENCE OVER WRN COLOMBIA AND PANAMA...AND HAS AIDED IN THE DEVELOPMENT OF A LARGE CLUSTER OF NUMEROUS MODERATE/STRONG CONVECTION FROM 6N-11N BETWEEN 75W-83W AND RUNNING S ALONG THE COLOMBIAN COAST TO NEAR BUENAVENTURA. ELSEWHERE...SPORADIC CONVECTION IS ONGOING NEAR THE ITCZ. SCATTERED MODERATE/STRONG CONVECTION HAS RECENTLY DEVELOPED OVER THE GULF OF TEHUANTEPEC FROM 14N-16N BETWEEN 93W-96W. W OF 110W... A LARGE CYCLONIC VORTEX IS NEARLY STATIONARY JUST S OF THE GULF OF ALASKA AND ITS CIRCULATION REACHES WELL INTO THE DISCUSSION AREA WITH SW FLOW ALOFT EXTENDING FROM S OF HAWAII TOWARDS CALIFORNIA. THIS FLOW IS ALSO BOUNDED BY A LARGE UPPER HIGH NEAR 23N120W WHICH IS PRODUCING MODERATE/STRONG SUBSIDENCE N OF 18N. THIS STABLE ENVIRONMENT CONTINUES TO FOSTER A NEARLY OVERCAST STRATOCUMULUS LAYER N OF 20N W OF 115W WHICH IS BEING PULLED SW BY THE TRADES. IN THE DEEP TROPICS...THE UPPER LEVEL FLOW IS PREDOMINANTLY EASTERLY AS FAR W AS 125W...THEN TURNS MORE SLY IN RESPONSE TO THE UPPER TROUGH FARTHER N. ALSO...AN INVERTED UPPER TROUGH STILL EXTENDS FROM 9N133W TO EQ124W AND ALL THESE FACTORS ARE ALLOWING DEEP CONVECTION TO FORM ALONG THE ITCZ W OF 130W. $$ BERG