000 AXPZ20 KNHC 281520 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1605 UTC WED FEB 28 2007 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS. BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 1500 UTC. ...ITCZ... ITCZ AXIS IS CENTERED ALONG 7N77W 4N96W 9N120W 9N140W. SCATTERED MODERATE CONVECTION WITHIN 60 NM OF THE AXIS BETWEEN 82W-89W. SCATTERED MODERATE WITHIN 90 NM OF THE AXIS BETWEEN 120W-138W. ...DISCUSSION... W OF 105W... A DEEP MID/UPPER LEVEL TROUGH IS LOCATED W OF THE AREA ROUGHLY ALONG 153W WITH A NEARLY CUT-OFF LOW VERY NEAR THE BIG ISLAND OF HAWAII. THIS IS TURN IS PRODUCING A EXTENSIVE AREA OF UPPER LEVEL DIFFLUENCE E OF THE HAWAIIAN ISLANDS EXTENDING ACROSS 140W AND WIDESPREAD HIGH CLOUDINESS N OF 7N AND W OF 115W...ALSO EXTENDING NE INTO NW MEXICO. INCIDENTALLY...THESE CLOUDS ARE BEING ADVECTED BY THE SUBTROPICAL JET WHICH EXTENDS NE OF 24N140W AND MERGES WITH THE POLAR JET ALONG THE CALIFORNIA/ MEXICO BORDER...PRODUCING A 150+ KT JET CORE ALONG 32N. CONFLUENT FLOW INTO THE JET IS PRODUCING SOME SUBSIDENCE OVER THE N PART OF THE REGION...AND ALSO HELPING TO STRENGTHEN THE SURFACE RIDGE EXTENDING FROM 30N130W TO 20N110W. THE STRONG GRADIENT IS PRODUCING 20-25 KT WINDS WITHIN THE TRADES...AS WELL AS DOWN THE COAST OF BAJA CALIFORNIA. E OF 105W... A MID-LEVEL HIGH IS CENTERED IN THE VICINITY OF SE MEXICO/NRN CENTRAL AMERICA WITH A RIDGE AXIS PLANTED ALONG 18N AND ONLY WEAKLY AMPLIFIED FLOW ACROSS THE SRN UNITED STATES. STRONG SUBSIDENCE DOMINATES THE REGION NEAR THE RIDGE LYING S OF 22N TO THE EQUATOR. THIS IS CAUSING FAIR WEATHER UP AND DOWN THE MEXICAN/CENTRAL AMERICAN COAST WITH THE ITCZ SUPPRESSED TO ALONG 5N. OTHERWISE...ONLY A FEW CLOUDS ARE MAKING IT ACROSS NICARAGUA AND COSTA RICA FROM THE CARIBBEAN WATERS DUE TO STRONG TRADE WINDS FLOW IN THAT AREA. $$ BERG