000 AXPZ20 KNHC 160906 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC TUE SEP 16 2008 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 N OF 4N ALONG 86W/87W MOVING W 10-15 KT. LARGE AREA OF SHOWERS/TSTMS ACROSS MUCH OF THE WESTERN CARIBBEAN CENTRAL AND AMERICA AND THE ADJACENT PACIFIC WATERS S OF PANAMA AND COSTA RICA. TROPICAL WAVE ALONG FROM 4N-15N 108W S OF 15N MOVING W 10 KT. SCATTERED MODERATE CONVECTION ALONG THE S PORTION OF THE WAVE FROM 5N-8N BETWEEN 106W-109W. ...ITCZ... ITCZ AXIS IS CENTERED FROM 984W TO 7N100W TO 12N125W TO 8N140W. NUMEROUS MODERATE TO STRONG CONVECTION FROM 05N-09N E OF 86W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 180 NM S OF AXIS FROM 115W AND 120W. ...DISCUSSION... A PERSISTENT UPPER LEVEL ANTICYCLONIC CIRCULATION OVER THE WESTERN PORTION OF THE DISCUSSION AREA IS LOCATED NEAR 24N136W WITH RIDGE EXTENDING NWD TO 32N134W. A LARGE AREA OF MODERATE TO STRONG SUBSIDENCE COVERS THE AREA N OF 15N W OF 115W. AN UPPER TROUGH EXTENDS FROM SOUTHERN CALIFORNIA TO 23N126W. UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONIC CIRCULATION OVER CENTRAL MEXICO NEAR 22N99W TO ANOTHER ANTICYCLONIC CIRCULATION NEAR 22N117W. A SHARP TROUGH IN THE GULF OF MEXICO EXTENDS SW ACROSS SOUTHERN MEXICO TO 15N97W. UPPER LEVEL ANTICYCLONE OVER THE NW CARIBBEAN JUST OFFSHORE OF HONDURAS WITH BROAD ANTICYCLONIC FLOW EXTENDING OVER THE PACIFIC WATERS E OF 96W. BROAD UPPER LEVEL DIFFLUENCE ASSOCIATED WITH THE ANTICYCLONIC CIRCULATION IS ENHANCING DEEP CONVECTION OVER PARTS OF CENTRAL AMERICA...NEAR THE TROPICAL WAVE ALONG 86W/87W...WITH UPPER LEVEL MOISTURE FLOWING W TO 90W AND NWD ACROSS THE REST OF CENTRAL AMERICA INTO THE CIRCULATION AROUND THE SHARP TROUGH OVER THE GULF OF MEXICO. SURFACE RIDGE EXTENDS FROM 32N137W TO 21N124W. BROKEN/OVERCAST STRATOCUMULUS CLOUDS ARE N OF 20N W OF 115W. SURFACE TROUGH ANALYZED ALONG THE ITCZ FROM 14N-8N ALONG 100W. A FEW SHOWERS ARE ALONG THE TROUGH. ANOTHER TROUGH IS ANALYZED ALONG THE BAJA PENINSULA FROM A 1009 MB LOW OVER NORTHERN BAJA CALIFORNIA NEAR 31N115W TO 22N109W. NO SIGNIFICANT WEATHER ASSOCIATED WITH THE TROUGH. $$ DGS