000 AXPZ20 KNHC 100320 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC MON NOV 10 2008 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0300 UTC. ...ITCZ... THE INTERTROPICAL CONVERGENCE ZONE AXIS IS ALONG THE LINE EXTENDING FROM 07N77W TO 06N110W TO 07N140W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM OF THE POINT 07.5N126W. ...DISCUSSION... STRONG SHORTWAVE TROUGH HAS MOVED ACROSS THE SOUTHWESTERN UNITED STATES AND SWEPT ACROSS THE NORTHEAST PART OF THE PACIFIC OCEAN AREA. SHORTWAVE IS PASSING THROUGH NORTHERN MEXICO. CLOUDS ASSOCIATED WITH THIS FEATURE ARE CONFINED TO JUST NORTH OF THE AREA OVER THE UNITED STATES. THE MIDDLE AND UPPER LEVELS WEST OF THE TROUGH ARE DRY AND CLOUD FREE. A DEEP LAYER TROUGH AXIS IS ALONG THE LINE FROM 29N100W TO 23N120W TO 11N140W. A CYCLONIC CIRCULATION THAT HAD BEEN CENTERED NEAR 20N131W HAS WEAKENED AND TRANSFORMED FROM CIRCULATION VORTICITY TO SHEAR VORTICITY. THE AREA W AND N OF THE TROUGH AXIS IS DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS WITH MOSTLY BROKEN TO SCATTERED STRATOCUMULUS IN THE LOWER LEVELS. A PLUME OF MOSTLY UPPER LEVEL MOISTURE AND BROKEN TO OVERCAST HIGH CLOUDS EXTENDS 300 NM SE OF THE TROUGH AXIS. THIS MOISTURE EMANATES FROM CONVECTION THAT HAS BEEN IN THE AREA FROM 10N TO 14N FROM 128W TO 135W. THIS CONVECTION IS DIMINISHING AT THIS TIME. THE TROUGH IS FORECAST TO REMAIN IN PLACE THROUGH 48 HOURS AND WEAKEN SLIGHTLY. REMAINDER OF AREA IS BROAD ANTICYCLONIC FLOW IN THE MIDDLE AND UPPER LEVELS. EXCEPT FOR SOME MOISTURE NEAR THE COASTS OF PANAMA TO NICARAGUA THE AREA SOUTHEAST OF THE LINE FROM 23N98W TO 20N110W TO 07N115W TO 06N135W TO 00N135W IS DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS. BROKEN TO OVERCAST STRATOCUMULUS IS SOUTH OF THE ITCZ FROM 80W TO 125W. MODERATE SURFACE RIDGE IS NORTH OF 15N WEST OF 118W. REMAINDER OF THE AREA IS ANALYZED AS BROAD TROUGH. $$ LL