000 AXPZ20 KNHC 151517 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1605 UTC TUE APR 15 2014 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 1500 UTC. ...SPECIAL FEATURE... GULF OF TEHUANTEPEC STORM WARNING HIGH PRES BUILDING W OF A COLD FRONT IS MOVING ACROSS THE GULF OF MEXICO WILL TIGHTEN THE PRES GRADIENT ACROSS SOUTHERN MEXICO RESULTING IN GALE FORCE INTO THE GULF OF TEHUANTEPEC BY EARLY AFTERNOON. THESE WINDS WILL INCREASE TO STORM FORCE BY LATE AFTERNOON/EARLY EVENING. WINDS ARE THEN EXPECTED TO DIMINISH BELOW GALE FORCE BY WED AFTERNOON...AND DIMINISH FURTHER TO 20 KT OR LESS WED EVENING. THE STRONG WINDS THROUGH TEHUANTEPEC WILL PRODUCE A LARGE AREA OF NE SWELL DOWNSTREAM INTO THE EASTERN PACIFIC...COVERING AN AREA FROM 07N TO 12N BETWEEN 95W AND 103W WITH SEAS TO 10 FT BY LATE THU. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH FROM 10N86W TO 5N106W. ITCZ FROM 5N106W TO 4N125W TO 3N140W. SCATTERED MODERATE TO STRONG CONVECTION FROM 5N-9N BETWEEN 81W-86W AND FROM 5N-7N BETWEEN 125W-132W. ...DISCUSSION... BROAD UPPER LEVEL RIDGE COVERS MUCH OF THE DISCUSSION AREA BASICALLY W OF 115W. AN 115-120 KT JETSTREAM ACROSS THE N PORTION OF THE RIDGE ENTERS THE AREA AT 24N140W TO 32N125W INTO NORTHERN BAJA CALIFORNIA. BROKEN TO OVERCAST MIDDLE AND HIGH CLOUDS ARE WITHIN 600 NM S OF THE JETSTREAM W OF 125W. AN UPPER LEVEL TROUGH E OF THE RIDGE WITH AXIS FROM THE BIG BEND OF TEXAS ACROSS MEXICO TO 10N105W TO THE EQUATOR AT 110W. AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED AT THE EQUATOR AT 86W. SURFACE HIGH PRES RIDGE IS N OF 15N W OF 115W. THE PRES GRADIENT BETWEEN THE RIDGE AND THE ITCZ IS STRONG ENOUGH TO SUPPORT ELY WINDS TO 20 KT WITH SEAS 8 TO 10 FT IN MIXED SE AND NW SWELL FROM 7N-18N W OF 120W. $$ DGS