000 AXPZ20 KNHC 081003 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1005 UTC WED JUL 08 2015 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0900 UTC. ...SPECIAL FEATURES... THE CENTER OF TROPICAL DEPRESSION FOUR-E IS TO THE WEST OF THE AREA...NEAR 17.3N 141.2W AT 08/0900 UTC. PLEASE READ THE LATEST CPHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMCP1/WTPA21 PHFO FOR MORE DETAILS. ...TROPICAL WAVES... A TROPICAL WAVE ALONG IS 108W/109W FROM 15N SOUTHWARD...MOVING WESTWARD 10 TO 15 KNOTS. THE CONVECTIVE PRECIPITATION INFORMATION IS GIVEN IN THE MONSOON TROUGH/ITCZ SECTION. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... .TROPICAL DEPRESSION FOUR-E...SCATTERED STRONG FROM 12N TO 15N BETWEEN 139W AND 141W. MONSOON TROUGH FROM 08N82W TO 08N103W TO 07N114W TO 05N120W. ITCZ FROM 05N120W TO 04N127W TO 07N131W. CONVECTIVE PRECIPITATION...SCATTERED STRONG FROM 05N TO 07N BETWEEN 104W AND 107W...AND FROM 04N TO 06N BETWEEN 110W AND 112W. SCATTERED MODERATE ISOLATED STRONG FROM 06N TO 08N BETWEEN 83W AND 85W..FROM 08N TO 10N BETWEEN 84W AND 85W...AND FROM 03N TO 06N BETWEEN 112W AND 116W. ...DISCUSSION... A MIDDLE LEVEL TO UPPER LEVEL CYCLONIC CIRCULATION CENTER IS NEAR 37N126W. CYCLONIC WIND FLOW THAT IS MOVING AROUND THE CENTER COVERS THE EASTERN PACIFIC OCEAN FROM 30N NORTHWARD BETWEEN THE NORTHERN SECTIONS OF THE BAJA CALIFORNIA PENINSULA AND 140W...AND FROM 25N TO 30N BETWEEN MEXICO AND 132W. A MIDDLE LEVEL TO UPPER LEVEL TROUGH IS ALONG 20N112W 17N117W 12N119W 05N122W TO 1N121W. CYCLONIC WIND FLOW COVERS THE AREA THAT IS FROM THE EQUATOR TO 22N BETWEEN 110W AND 130W. A MIDDLE LEVEL TO UPPER LEVEL TROUGH IS ALONG 23N117W 20N122W 16N128W 9N130W. CONVECTIVE PRECIPITATION...SCATTERED MODERATE TO ISOLATED STRONG FROM 2N TO 10N BETWEEN 125W AND 134W. A SURFACE RIDGE EXTENDS FROM 17N111W TO 25N127W...BEYOND 32N143W. WINDS ARE MAINLY LIGHT TO MODERATE ACROSS THE WATERS THAT ARE TO THE WEST OF 120W ALONG WITH SEAS THAT ARE LESS THAN 8 FT...OUTSIDE OF THE INFLUENCE OF TROPICAL DEPRESSION FOUR-E A LARGE AREA OF LONG PERIOD CROSS EQUATORIAL SW SWELL IS CONTINUING TO SWEEP TO THE N-NE ACROSS THE S CENTRAL WATERS W OF THE GALAPAGOS ISLANDS. THIS SWELL WILL CONTINUE TO PROPAGATE NORTHWARD COVERING THE MAJORITY OF THE S CENTRAL WATERS THROUGH THU...GRADUALLY SUBSIDING THROUGH THE REMAINDER OF THE WEEK INTO THE WEEKEND. THE GULF OF TEHUANTEPEC...THE SURFACE PRESSURE GRADIENT THAT IS NEAR THE GULF AREA IS EXPECTED TO TIGHTEN BY THURSDAY AROUND SUNRISE. A TROPICAL WAVE THAT CURRENTLY IS IN THE CENTRAL CARIBBEAN SEA IS FORECAST TO BE PASSING THROUGH THE AREA. ONE RESULT IS THAT A SURGE OF FRESH TO STRONG NORTHERLY WINDS WILL OCCUR IN THE GULF ON THURSDAY...AND THE SEA HEIGHTS WILL BUILD TO 8 TO 9 FEET BY SUNRISE ON THURSDAY. THE GULF OF PAPAGAYO...STRONG CARIBBEAN SEA TRADE WINDS CONTINUE TO SPILL ACROSS SOUTHERN CENTRAL AMERICA...THROUGH THE GULF OF PAPAGAYO INTO THE EASTERN PACIFIC OCEAN. THE WINDS WILL CONTINUE TO PULSE TO FRESH TO STRONG...MAINLY DURING THE LATE NIGHT INTO THE EARLY MORNING HOURS...WITH NOCTURNAL DRAINAGE FLOW ENHANCEMENT. RESULTANT SEA HEIGHTS OF 8 TO 10 FEET WILL PROPAGATE AWAY FROM THE GULF TOWARD THE SOUTHWEST-TO-WEST... DURING THE NEXT 48 HOURS. THE GULF OF CALIFORNIA...THE SURFACE PRESSURE GRADIENT WILL INCREASE IN THE FAR NORTHERN GULF OF CALIFORNIA LATE ON WEDNESDAY INTO THE PRE-SUNRISE HOURS OF THURSDAY MORNING...AS A SURFACE TROUGH THAT EXTENDS FROM SOUTHERN CALIFORNIA TO THE NORTHERN PORTION OF THE BAJA CALIFORNIA PENINSULA DEEPENS. THE WIND SPEEDS THEN WILL DIMINISH BRIEFLY TO 20 KT OR LESS ON THURSDAY AFTERNOON BEFORE INCREASING TO 20-25 KNOTS ON THURSDAY EVENING AS THE TROUGH DEEPENS ONCE AGAIN. $$ MT