000 AXPZ20 KNHC 240400 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC WED JAN 24 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0345 UTC. ...ITCZ... ITCZ AXIS IS CENTERED ALONG 5N77W 10N110W 4N135W 4N140W. NO SIGNIFICANT CONVECTION. ...DISCUSSION... HIGHLY AMPLIFIED UPPER LEVEL PATTERN IS IN PLACE OVER THE ERN N PAC THIS AFTERNOON. CUTOFF LOW REMAINS IN PLACE OVER NRN MEXICO AND THE BIG BEND AREA OF TEXAS. A TRAILING UPPER TROUGH EXTENDS TO THE SW TO NEAR 13N140W. WIDESPREAD MULTILAYER CLOUDINESS IS APPARENT ALONG THE UPPER TROUGH E OF 120W. UPPER DIVERGENCE IS SUPPORTING A WEAK SURFACE TROUGH SHOWING UP IN MORNING QUIKSCAT DATA FROM 6N117W TO 14N109W. TO THE NW OF OF THE UPPER TROUGH...A STRONG UPPER RIDGE IS BUILDING OVER OVER THE U.S. W COAST...AHEAD OF A VIGOROUS UPPER TROUGH DIGGING N OF 30N ROUGHLY ALONG 145W. A 1030 MB SURFACE RIDGE IS ASSOCIATED WITH THE UPPER RIDGE IS CENTERED NEAR 35N127W AND IS SHIFTING S. QUIKSCAT DATA AND SHIP OBSERVATIONS ARE SHOWING FRESH TO STRONG TRADES WINDS S OF THE RIDGE AXIS W OF 115W. SATELLITE IMAGERY SHOWS OFFSHORE FLOW CREATING CLEAR SKIES OFF THE BAJA COAST OUT 500 NM...THEN LARGE AREAS OF STRATOCUMULUS. MEANWHILE...A SURFACE COLD FRONT ASSOCIATED WITH THE UPPER TROUGH TO THE NW IS PUSHING E TOWARD THE AREA. THIS IS PROGGED TO STALL AND WASH OUT OVER THE NEXT COUPLE OF DAYS AS UPPER SUPPORT LIFTS OUT. HOWEVER...EXPECT LARGE SWELL TO PUSH INTO NW FORECAST AREA BEHIND THE FRONT. STRONG N TO NE WINDS PERSIST OVER THE GULF OF CALIFORNIA TONIGHT AND THROUGH TOMORROW AS COLD AIR ADVECTION CONTINUES TO PUSH INTO THE AREA. AS FOR GULF OF TEHUANTEPEC...SURFACE OBSERVATIONS FROM MMMT ON THE GULF OF MEXICO COAST FROM EARLIER THIS EVENING SHOWED SUSTAINED 20 KT WITH GUSTS TO 30 KT...INDICATING BOUNDARY LAYER WINDS ARE ALREADY INCREASING THROUGH THE ISTHMUS. WINDS WILL INCREASE OVER TEHUANTEPEC AREA TO GALE FORCE BY LATE THU. FURTHER S...MORNING QUIKSCAT SHOWS FRESH TO STRONG GAP FLOW OVER GULF OF PAPAGAYO ALSO PERSISTING. $$ CHRISTENSEN