000 AXPZ20 KNHC 080330 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC FRI JUL 08 2011 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 0245 UTC. ...SPECIAL FEATURES... TROPICAL DEPRESSION THREE WAS UPGRADED TO TROPICAL STORM CALVIN AT 0300 UTC WHERE CALVIN WAS LOCATED NEAR 16.0N104.3W. CALVIN WAS MOVING W-NW OR 290 DEGREES AT 12 KT. MAXIMUM SUSTAINED WIND SPEED IS 35 KT WITH GUSTS OF 45 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1003 MB. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS /WMO HEADERS MIATCMEP3/WTPZ23 KNHC FOR MORE DETAILS. NUMEROUS STRONG CONVECTION IS LOCATED WITHIN 150 NM OF THE CENTER OF CIRCULATION. ...ITCZ/MONSOON TROUGH... MONSOON TROUGH AXIS FROM 10N86W TO 15N95W THEN BREAKS AND CONTINUES FROM 12N106W TO 09N112W THEN ITCZ TO 09N130W TO BEYOND 05N140W. SCATTERED MODERATE CONVECTION WITHIN 120 NM OF THE ITCZ AXIS BETWEEN 130W AND 136W. ...DISCUSSION... AT THE SURFACE...A 1029 MB HIGH PRESSURE IS CENTERED NW OF THE AREA NEAR 36N149W. THE PRESSURE GRADIENT BETWEEN THIS HIGH PRESSURE AND THE ITCZ IS SUPPORTING FRESH TO STRONG NE WINDS OVER THE AREA NW OF A LINE FROM 30N131W TO 22N140W. THESE WINDS ARE FORECAST TO DIMINISH BELOW 20 KT BY SAT NIGHT...WITH LINGERING 8 FT SWELL AS THE HIGH PRES DISSPATES AND HIGH PRESSURE CENTERED TO THE WEST NEAR 38W157W BECOMES DOMINANT. CROSS-EQUATORIAL MIXED SE AND SW SWELLS WILL PREVAIL OVER THE S CENTRAL WATERS THROUGH THE FORECAST PERIOD. SIGNIFICANT WAVE HEIGHTS WILL REACH AS HIGH AS 11 FT AS THE SWELLS CONTINUE TO PROPAGATE INTO THE AREA. $$ AL 000 AXPZ20 KNHC 080330 TWDEP TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC FRI JUL 08 2011 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS. BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0245 UTC. ...SPECIAL FEATURES... TROPICAL DEPRESSION THREE WAS UPGRADED TO TROPICAL STORM CALVIN AT 0300 UTC WHERE CALVIN WAS LOCATED NEAR 16.0N104.3W. CALVIN WAS MOVING W-NW OR 290 DEGREES AT 12 KT. MAXIMUM SUSTAINED WIND SPEED IS 35 KT WITH GUSTS OF 45 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1003 MB. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS /WMO HEADERS MIATCMEP3/WTPZ23 KNHC FOR MORE DETAILS. NUMEROUS STRONG CONVECTION IS LOCATED WITHIN 150 NM OF THE CENTER OF CIRCULATION. ...ITCZ/MONSOON TROUGH... MONSOON TROUGH AXIS FROM 10N86W TO 15N95W THEN BREAKS AND CONTINUES FROM 12N106W TO 09N112W THEN ITCZ TO 09N130W TO BEYOND 05N140W. SCATTERED MODERATE CONVECTION WITHIN 120 NM OF THE ITCZ AXIS BETWEEN 130W AND 136W. ...DISCUSSION... AT THE SURFACE...A 1029 MB HIGH PRESSURE IS CENTERED NW OF THE AREA NEAR 36N149W. THE PRESSURE GRADIENT BETWEEN THIS HIGH PRESSURE AND THE ITCZ IS SUPPORTING FRESH TO STRONG NE WINDS OVER THE AREA NW OF A LINE FROM 30N131W TO 22N140W. THESE WINDS ARE FORECAST TO DIMINISH BELOW 20 KT BY SAT NIGHT...WITH LINGERING 8 FT SWELL AS THE HIGH PRES DISSPATES AND HIGH PRESSURE CENTERED TO THE WEST NEAR 38W157W BECOMES DOMINANT. CROSS-EQUATORIAL MIXED SE AND SW SWELLS WILL PREVAIL OVER THE S CENTRAL WATERS THROUGH THE FORECAST PERIOD. SIGNIFICANT WAVE HEIGHTS WILL REACH AS HIGH AS 11 FT AS THE SWELLS CONTINUE TO PROPAGATE INTO THE AREA. $$ AL