000 AXPZ20 KNHC 230318 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC MON JUL 23 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 13.3N 107.6W...OR ABOUT 380 NM SSE OF SOCORRO ISLAND...AT 23/0300 UTC MOVING WNW AT 7 KT. MAXIMUM SUSTAINED WIND SPEED IS 30 KT WITH GUSTS TO 40 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1007 MB. THE LAST FEW VISIBLE IMAGES OF THE DAY INDICATED THAT THE DEPRESSION DOES NOT HAVE A WELL-DEFINED CENTER...AND THERE IS PROBABLY 1 OR 2 SWIRLS ROTATING AROUND A MEAN CENTROID. WHEREVER THE EXACT CENTER IS...DEEP CONVECTION HAS BEEN DISPLACED PRIMARILY TO THE WRN SEMICIRCLE DUE TO ABOUT 25 KT OF NORTHEASTERLY SHEAR. ONE SMALL CONVECTIVE BAND HAS ATTEMPTED TO BUILD JUST TO THE S OF THE CENTER BUT HAS MADE NO PROGRESS PROPAGATING AROUND TO THE E SIDE. SCATTERED MODERATE/ISOLATED STRONG CONVECTION FROM 11N-18N BETWEEN 107W-112W. SCATTERED MODERATE FROM 9N-14N BETWEEN 102W-107W. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP2/WTPZ22 KNHC FOR MORE DETAILS. ...ITCZ... ITCZ AXIS IS CENTERED ALONG 6N77W 15N105W THEN 15N116W 9N130W 8N140W. SCATTERED MODERATE CONVECTION FROM 5N-10N BETWEEN 82W-87W. SCATTERED MODERATE WITHIN 90 NM OF AXIS BETWEEN 121W-133W AND W OF 137W. ...DISCUSSION... E OF 110W... AN ELONGATED UPPER LOW CENTERED OVER THE BAY OF CAMPECHE AND A STRONG UPPER HIGH OVER NW MEXICO NEAR GUAYMAS CONTINUE TO PRODUCE A STEADY NORTHERLY FLOW ACROSS MUCH OF MEXICO EXTENDING S AND TURNING W OVER THE PACIFIC WATERS. THIS STRONG FLOW IS PRODUCING 25 KT OF NORTHEASTERLY SHEAR OVER T.D. SEVEN-E AND ARRESTING ITS DEVELOPMENT FOR THE TIME BEING. TSTMS WHICH FORMED OVER THE MEXICAN PLATEAU AND THE ADJACENT SRN MOUNTAINS HAVE REACHED THE PACIFIC COAST IN THE NORTHERLY STEERING FLOW AND NOW EXTEND BETWEEN THE GULF OF TEHUANTEPEC AND TOPOLOBAMPO IN NW MEXICO. OTHER TSTMS EXTEND JUST INLAND OF THE COAST FARTHER S BETWEEN THE GULF OF TEHUANTEPEC AND CENTRAL NICARAGUA. ELSEWHERE...AN INVERTED UPPER TROUGH LIES S OF THE GULF OF TEHUANTEPEC ALONG 97W WITH A COL REGION NOTED OVER THE ISTHMUS OF TEHUANTEPEC. A CLOSED UPPER HIGH S OF JAMAICA IS PRODUCING BROAD AND DEEP EASTERLY FLOW OUT OF COLOMBIA INTO THE E PACIFIC BASIN...AND THE HIGH MOISTURE VALUES ARE ALLOWING SCATTERED TSTMS TO DEVELOP ALONG THE ITCZ AS WELL AS INLAND FROM PANAMA TO NICARAGUA. W OF 110W... THE PREVAILING UPPER LEVEL FEATURE OVER THE W PART OF THE AREA IS THE LARGE UPPER HIGH LOCATED OVER THE GULF OF CALIFORNIA NEAR 27N111W WITH THE CIRCULATION COVERING PRACTICALLY THE ENTIRE AREA W OF 110W. THE HIGH IS ADVECTING DEEP TROPICAL MOISTURE FROM THE E PART OF THE BASIN WWD TO ABOUT 120W WHERE IT THINS OUT CONSIDERABLY IN FAVOR OF LARGE-SCALE SUBSIDENCE TO THE NW. A WEAK MID/UPPER TROUGH IS LOCATED NEAR 140W JUST W OF THE UPPER HIGH/RIDGE SYSTEM BUT IT IS NOT CAUSING ANY SIGNIFICANT WEATHER. THE SUBTROPICAL RIDGE AND THE EASTERLY TRADES REMAIN IN A SUBDUED STATE...AND THIS IS NOT EXPECTED TO CHANGE OVER THE NEXT FEW DAYS WITH A COLD FRONT/UPPER TROUGH APPROACHING THE NW PART OF THE REGION. $$ BERG