000 AXPZ20 KNHC 272125 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 2205 UTC SUN APR 27 2008 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 2100 UTC. ...ITCZ... ITCZ AXIS ALONG 06N77W TO 04N82W TO 08N90W TO 05N122W TO 00N140W. WIDELY SCATTERED MODERATE CONVECTION WITHIN 120 AND 180 NM OF THE AXIS W OF 128W. SCATTERED MODERATE CONVECTION IS WITHIN 120 NM N OF THE AXIS E OF 82W AND WITHIN 60 NM EITHER SIDE OF THE AXIS BETWEEN 89W-92W. A SECONDARY AXIS LIES S OF THE MAIN ONE ALONG 3N88W TO 1N94W TO 00N102W. SCATTERED MODERATE CONVECTION IS WITHIN 120 NM N OF THE AXIS E OF 98W. ...DISCUSSION... W OF 100W... AN AMPLIFIED MID-UPPER PATTERN REMAINS OVER THE REGION WITH A SPRAWLING RIDGE BEING THE MAIN FEATURE ROUGHLY ALONG 125W. DIFFLUENCE ALOFT TO THE W OF THE RIDGE AXIS...ASSOCIATED WITH A SERIES OF SHORTWAVES N AND W OF THE REGION...IS PRODUCING ABUNDANT CLOUDINESS AND SCATTERED SHOWERS S OF 14N W OF 130W AND SCATTERED TO BROKEN MID-HIGH LEVEL CLOUDS ELSEWHERE W OF 135W. THIS PATTERN IS ALSO HELPING TO SUSTAIN WIDELY SCATTERED MODERATE CONVECTION NEAR THE ITCZ AXIS W OF 128W. THIS BLOCKING RIDGE IS AIDING IN THE DECAY OF THE TAIL END OF A STATIOANRY FRONT THAT BARELY CLIPS THE NW CORNER OF THE DISCUSSION ZONE. UPPER CONFLUENCE TO THE E OF THE RIDGE AXIS...GREATLY ENHNACED BY A LARGE SCALE TROUGH EXTENDING SSW FROM CENTRAL CANADA TO THE SOUTHERN TIP OF BAJA...IS PRODUCING A VERY DRY ATMOSPHERE N OF 17N E OF 127W. A SUBTROPICAL JET ORGINATES JUST E OF THE TROUGH BASE AND IS GENERATING/TRANSPORTING A PLUME OF HIGH LEVEL MOISTURE WITHIN 300 NM SE OF A LINE FROM 14N113W 23N100W. IN THE LOWER LEVELS...BESIDES FOR THE DYING AFORMENTIONED STATIONARY FRONT...A 1028 MB SUBTROPICAL RIDGE DOMINATES PRODUCING AN AREA OF N WINDS NEAR 20 KT N OF 27N BETWEEN 120W-127W AND A SIMILAR MAGNITUDE AREA OF NE TRADES OVER THE SW PORTION OF THE ZONE. E OF 100W... UPPER RIDGING EXTENDING NW FROM COLOMBIA TO THE YUCATAN PENNISULA IS PRODUCING LIGHT SLY FLOW ALOFT WHICH MAY BE ENHANCING SCATTERED CLUSTERS OF CONVECTION IN THE AREA...MAINLY FROM 1N TO 7N BETWEEN 81W AND 98W. 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. $$ CANGIALOSI