000 AXPZ20 KNHC 090400 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC SUN DEC 09 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 0345 UTC. ...ITCZ... INTERTROPICAL CONVERGENCE ZONE AXIS ALONG 6N77W 5N100W 12N120W 10N130W 8N140W. SCATTERED MODERATE CONVECTION WITHIN 90-120 NM N OF AXIS BETWEEN 120W AND 125W. SCATTERED MODERATE CONVECTION FROM 17N TO 19N BETWEEN 114W AND 117W. ...DISCUSSION... BROAD TROUGHING PATTERN REMAINS IN PLACE ACROSS THE AREA BETWEEN 100W AND 130W. UPSTREAM NEGATIVELY TILTED MID TO UPPER LEVEL SUBTROPICAL RIDGE IN PHASE WITH TROPICAL RIDGE WITH AXIS THROUGH 32N139W 20N138W TO THE EQUATOR AT 137W. RIDGE HAS AMPLIFIED OVER THE PAST 24 HOURS. SEVERAL SHORTWAVES WERE NOTED WITHIN THE AREA OF BROAD TROUGHING. THE MOST SIGNIFICANT TROUGH EXTENDED FROM S CALIFORNIA SWWD TO NEAR 24N126W. MODERATE TO STRONG UPPER LEVEL SUBSIDENCE WAS WRAPPING AROUND THE BASE OF THIS TROUGH ACROSS BAJA CALIFORNIA AND NW MEXICO. ASSOCIATED SURFACE COLD FRONT WAS SLICING SEWD ACROSS THE CENTRAL GULF OF CALIFORNIA AND NE PACIFIC WATERS FROM 27N110W 22N120W TO 20N132W AND WAS USHERING IN FRESH NW TO N WINDS OF 20 TO 25 KT AND 9 TO 14 FT SWELLS. MEANWHILE...DIFFLUENT SLY FLOW ON THE EAST SIDE OF THE BROAD UPPER TROUGH WAS MAINTAINING SOME CONVECTION ALONG A WEAK SURFACE TROUGH ALONG 20N115W 10N125W. BROAD MID TO UPPER LEVEL SWLY FLOW ALOFT WAS NOTED OVER THE TROPICAL PACIFIC E OF 100W WITHIN AN AREA OF MODERATE MID TO UPPER LEVEL SUBSIDENCE. THIS DRY AIR WAS SUPPRESSING ALL CONVECTION ALONG THE ITCZ. FURTHER E...0020 UTC HIGH RESOLUTION QUIKSCAT PASS INDICATED NE WINDS OF 20 KT IN THE GULF OF PAPAGAYO. THESE WINDS MAY INCREASE SLIGHTLY TO 25 KT AT TIMES OVER THE NEXT 24 HOURS AND REMAIN AT 20 KT THROUGH 48 HOURS. A SURGE OF SLY FLOW S OF THE EQUATOR WILL INCREASE WINDS AND SEAS TO THE WEST OF THE GALAPAGOS WITHIN 24 HOURS. $$ COBB