000 AXPZ20 KNHC 220316 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC SUN JUL 22 2007 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0300 UTC. ...SPECIAL FEATURE... TROPICAL DEPRESSION SEVEN-E CENTERED NEAR 12.7N 105.2W...OR ABOUT 390 NM S OF MANZANILLO MEXICO...AT 22/0300 UTC MOVING WNW 12 KT. MAXIMUM SUSTAINED WIND SPEED IS 25 KT WITH GUSTS TO 35 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1008 MB. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP2/WTPZ22 KNHC FOR MORE DETAILS. THE LAST FEW VISIBLE IMAGES OF THE DAY SHOWED THE DEPRESSION WITH AN IMPRESSIVE AND WELL-DEFINED BANDED STRUCTURE. HOWEVER...INFRARED IMAGERY SHOWS THAT MOST OF THIS CLOUD COVER LACKS MUCH IN THE WAY OF EMBEDDED DEEP CONVECTION. THE BROAD CANOPY OF CONVECTION WHICH DOMINATED THE SYSTEM EARLIER IN THE AFTERNOON HAS IS MAINLY DOMINATED BY SCATTERED SHOWERS/TSTMS WITH TWO PRIMARY BANDS EXTENDING AROUND THE S SIDE OF THE CENTER AND NWD UP TO 250 NM AWAY FROM THE CENTER. SCATTERED MODERATE/ISOLATED STRONG CONVECTION WITHIN 480 NM SE AND 240 NM NW SEMICIRCLES. ...ITCZ... ITCZ AXIS IS CENTERED ALONG 8N77W 8N86W 13N105W THEN 17N113W 10N125W 7N140W. SCATTERED MODERATE CONVECTION WITHIN 60 NM OF THE CENTRAL AMERICAN COAST BETWEEN COLOMBIA AND NICARAGUA. SCATTERED SHOWERS/TSTMS FROM 5N-8N BETWEEN 83W-91W. SCATTERED MODERATE WITHIN 60 NM OF AXIS BETWEEN 123W-130W. ...DISCUSSION... E OF 110W... SEE SPECIAL FEATURES FOR DISCUSSION ON T.D. SEVEN-E. SW OF THE GULF OF TEHUANTEPEC NEAR 12N103W. FOR THE MOST PART...THE UPPER LEVEL PATTERN OVER THE FAR E TROPICAL PACIFIC IS NOT DOMINATED BY ANY SIGNIFICANT FEATURES. A LARGE MID/UPPER LOW IS LOCATED JUST N OF THE YUCATAN PENINSULA AND TWO MID/UPPER LEVEL HIGHS ARE SITUATED OVER FAR NRN MEXICO AND THE SW CARIBBEAN. THESE THREE FEATURES ARE DRIVING PRIMARILY NE/E FLOW ALOFT OVER THE FAR E PACIFIC WATERS...AND ALSO SUPPORTING UPPER LEVEL DIFFLUENCE FROM ACROSS SE PARTS OF CENTRAL AMERICA TO T.D. SEVEN-E. AS A RESULT...SCATTERED CONVECTION HAS BEEN PULSING ALONG THE ITCZ E OF 90W AND HAS ALSO BEEN ORGANIZING NEAR THE DEPRESSION. SCATTERED TSTMS HAVE ALSO FORMED OVER THE MOUNTAINS FROM EL SALVADOR NW INTO INTERIOR MEXICO...AND THE STEERING FLOW FROM THE N IS PUSHING THIS ACTIVITY OVER THE BEACHES AND ADJACENT COASTAL WATERS AS FAR N AS PUERTO VALLARTA MEXICO. W OF 110W... A WEAK UPPER LEVEL HEIGHT PATTERN IS IN CONTROL OVER THE W PART OF THE DISCUSSION AREA AND THERE ARE FEW SIGNIFICANT WEATHER PRODUCERS AT THE MOMENT. THE UPPER LEVEL HIGH OVER NRN MEXICO NEAR 28N105W AND A MID/UPPER TROUGH ALONG THE NW COAST OF BAJA CALIFORNIA ARE PULLING DEEP TROPICAL MOISTURE NWD TOWARDS THE MOUTH OF THE GULF OF CALIFORNIA. HOWEVER...THE ELONGATED NWD EXTENSION OF THE ITCZ WHICH HAS BEEN IN PLACE OVER THE PAST SEVERAL DAYS IS NOW WEAKENING...AND THE LOW-LEVEL CONVERGENCE IS NO LONGER STRONG ENOUGH TO SUPPORT CONVECTION THAT FAR N. STILL...A FEW TSTMS HAVE FORMED ALONG THE E SHORE OF THE GULF OF CALIFORNIA THIS EVENING. ELSEWHERE...THE UPPER RIDGE ALONG 30N HAS BEEN SEVERELY WEAKENED BY A LARGE CYCLONIC GYRE OVER THE GULF OF ALASKA AND A MORE SUBDUED INVERTED TROUGH LOCATED ALONG 138W S OF 25N. AS A RESULT...THE SUBTROPICAL SFC RIDGE IS ALSO WEAKENED AND THE ELY TRADES ARE BARELY REACHING 20 KT NEAR 140W. $$ BERG