000 AXPZ20 KNHC 092134 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 2205 UTC FRI NOV 09 2007 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 2115 UTC. ...ITCZ... ITCZ AXIS IS CENTERED ALONG 9N85W 7N91W 7N100W 7N110W 8N120W 8N130W 9N140W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM OF THE AXIS BETWEEN 95W-102W AND BETWEEN 105W-107W. ...DISCUSSION... E OF 110W... PERSISTENT ELONGATED AND AMPLIFIED MID TO UPPER LEVEL RIDGING STRETCHES ALONG THE SPINE OF MEXICO AND INTO THE CENTRAL U.S. FROM AN ANTICYCLONE LOCATED OVER NW COLOMBIA. WIDESPREAD DRY STABLE AIR ALOFT IS EMBEDDED WITHIN THE RIDGE EXCEPT FROM 6N-11N BETWEEN 100W-108W WHERE THERE IS SOME ENHANCED ITCZ-RELATED CONVECTION. MORE ORGANIZED CLOUDINESS IS ACROSS THE ERN MOST PART OF THE AREA...ROUGHLY N OF 4N E OF 85W. THIS MOISTURE IS BEING ENHANCED BY A LOW-LEVEL TROUGH IN THE SW CARIB AND A DIFFLUENT UPPER PATTERN WHICH IS HELPING TO SPREAD DEBRIS CLOUDINESS. AN INVERTED UPPER SHORTWAVE LIES ALONG 109W PRODUCING LITTLE SENSIBLE WEATHER. GALE CONDITIONS HAVE ENDED IN THE GULF OF TEHUANTEPEC AS HIGH PRES HAS SEEPED S AND WEAKENED IN THE NRN GULF OF MEXICO. A RECENT ASCAT PASS SHOWED 20-25 KT WINDS IN THE GAP WHICH SHOULD CONTINUE OR DECREASE SLIGHTLY OVER THE NEXT COUPLE OF DAYS. SHIP AND SCATTEROMETER DATA ALSO SUGGEST THAT NE WINDS ARE NEAR 20 KT IN THE GULF OF PAPAGAYO WHICH SHOULD ALSO SUBSIDE SLIGHTLY OVER THE NEXT DAY OR TWO. W OF 110W... A LARGE SPRAWLING UPPER HIGH HAS BEEN SHIFTING EWD WITH THE MAIN ANTICYCLONE LOCATED NW OF THE HAWAIIAN ISLANDS. THE ASSOCIATED RIDGE AXIS STRETCHES ENE FROM 28N140W TO 33N130W. HIGH LEVEL CLOUDS ARE FILTERING SWD ON THE E SIDE OF THE RIDGE N OF 22N W OF 130W. A WEAKENING UPPER TROUGH LIES TO THE E OF THE BUILDING RIDGE FROM A DEEP LAYER LOW PRES SYSTEM NEAR MONTEREY CALIFORNIA SW ALONG 30N123W THROUGH 18N140W. A SWLY JET STREAM BRANCH...WITH MAXIMUM WINDS IN THE RANGE OF 50-60 KT...ENTERS THE AREA THROUGH 13N140W AND TURNS NE AROUND THE BASE OF THE AFOREMENTIONED TROUGH. AMPLE MID/UPPER LEVEL MOISTURE IS ADVECTED NE WITHIN 360 NM SE OF THE JET. ISOLATED SHOWERS ARE POSSIBLE UNDERNEATH THESE CLOUDS AND CLUSTERS OF SCATTERED MODERATE TO STRONG CONVECTION ARE OCCURRING S OF THE JET JUST W OF 140W. MODERATE SUBSIDENCE AND ASSOCIATED DRY AIR IS PRESENT WITHIN 360 NM S OF THE TROUGH W OF 130W. A WEAK UPPER HIGH CENTER IS NOTED NEAR 12N116W. AT THE SURFACE...A 1023 MB HIGH IS NEAR 27N135W WITH A RIDGE EXTENDING SE TO 22N112W. TRADES NEAR 20 KT ARE OCCURRING BETWEEN THE ITCZ AND THE HIGH PRES AREA. THESE WINDS SHOULD INCREASE SLIGHTLY OVER THE WEEKEND AS THE PRES GRADIENT TIGHTENS SOME. $$ CANGIALOSI