000 AXPZ20 KNHC 271544 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1605 UTC SUN APR 27 2008 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 1530 UTC. ...ITCZ... ITCZ AXIS ALONG 07N78W TO 06N90W TO 06N105W TO 05N125W TO 01N140W. WIDELY SCATTERED MODERATE WITHIN 120-180 NM OF THE AXIS BETWEEN 108W AND 135W. SCATTERED MODERATE FROM 01N TO 06N BETWEEN 87W AND 98W. ...DISCUSSION... W OF 100W... AMPLIFIED PATTERN CONTINUES TODAY OVER THE AREA AS A MID TO UPPER LEVEL RIDGE BUILDS NWD OVER THE WESTERN PORTION OF THE DISCUSSION AREA. THE RIDGE AXIS EXTENDS NORTHWARD FROM AN ANTICYCLONIC CIRCULATION CENTERED IN THE DEEP TROPICS NEAR 6N125W THROUGH 20N128W 32N125W TOWARD CALIFORNIA. DIFLUENT FLOW OVER THE W HALF OF THE RIDGE AXIS COUPLED WITH A 70-80 KT UPPER LEVEL JET EXITING THE FAR NW CORNER OF THE AREA HAS RESULTED IN A LARGE AREA OF MAINLY HIGH LEVEL MOISTURE ADVECTED OVER THE AREA W OF LINE 30N120W 17N130W. DOWNSTREAM SHARP POSITIVELY TILTED MID TO UPPER LEVEL TROUGH EXTENDS FROM SE NEW MEXICO ACROSS SOUTHER BAJA CALIFORNIA TO 20N125W. STRONG SUBSIDENCE WAS NOTED OVER THE SW PORTION OF THE TROUGH GENERALLY FROM 18N TO 25N BETWEEN 105W AND 123W. ANOTHER UPPER LEVEL JET WAS SLICING ACROSS THE BASE OF THE TROUGH OVER CENTRAL MEXICO INTO THE GULF WITH CORE SPEEDS OF 80-100 KT. THIS WAS AIDING IN MAINTAINING CONVECTION ALONG THE E COAST OF MEXICO JUST S OF TAMPICO. IN THE DEEP TROPICS DIFLUENT SWLY FLOW ALOFT WAS ENHANCING SCATTERED MODERATE TO STRONG CONVECTION WITHIN 120-180 NM OF THE ITCZ BETWEEN 120W AND 135W. E OF 100W... AN UPPER LEVEL RIDGE EXTENDS FROM NRN COLOMBIA WWD THROUGH COSTA RICA TO 15N100W. AREA OF MODERATE TO STRONG UPPER LEVEL SUBSIDENCE REMAINS OVER CENTRAL AMERICA AND THE W CARIBBEAN. UPPER LEVEL SE FLOW WAS ADVECTING TROPICAL MOISTURE NWD OVER THE TROPICAL E PACIFIC FUELING SOME CLUSTERS OF CONVECTION IN THE AREA...MAINLY FROM 1N TO 6N BETWEEN 87W AND 98W. AT THE SURFACE...1026 MB HIGH PRES N OF THE AREA NEAR 34N131W WITH ASSOCIATED RIDGE EXTENDING SE FROM THE HIGH TO 18N110W. GAP WINDS... COLD FRONT SLATED TO MOVE INTO THE GULF OF MEXICO LATER THIS AFTERNOON OR EVENING WILL MOVE SWD AND SPREAD COLD AIR THROUGH THE SW GULF OF MEXICO AND INTO THE GULF OF TEHUANTEPEC BY MON NIGHT. NWP MODELS ARE INDICATING WINDS SHOULD REACH GALE FORCE IN A LATE SEASON GAP WIND EVENT MON NIGHT INTO TUE. $$ COBB