000
AXPZ20 KNHC 060349
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED JAN 06 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...ITCZ...
AXIS ALONG 06N78W TO 02N88W TO 07N116W TO 07N136W TO 06N140W. 
NO SIGNIFICANT CONVECTION.

...DISCUSSION...
LARGE AMPLITUDE TROUGH FROM 32N106W TO 09N128W BEING FORCED NE BY 
BROAD UPSTREAM MID TO UPPER LEVEL RIDGE.  BOTH SYSTEMS MAINTAIN  
AREA S OF 22N W OF 120W FAIRLY DRY AND STABLE.  ABUNDANT TROPICAL 
MOISTURE ADVECTED NE TOWARDS CENTRAL MEXICO ON 100 KT SW JET CORE SE 
OF TROUGH.

LARGE AREA OF MOIST AIR MOVES INTO REGION N OF 22N W OF 123W 
PROMPTED BY UPPER LEVEL SHORT WAVE NEAR 30N139W USHERING 160 KT 
JETSTREAM W OF ITS AXIS INTO NW PART OF BASIN.  REMAINDER MID TO  
UPPER LEVELS KEPT FAIRLY DRY INCLUDING OVER ITCZ...WHICH HAS LITTLE 
OR NO SIGNIFICANT CONVECTION DUE TO STRONG SUBSIDENCE. 

AT THE SURFACE...SURFACE HIGH PRES CENTER 1021 MB AT 33N126W WITH 
ASSOCIATED RIDGE EXTENDING N OF 15N W OF 120W.  ANTICYCLONIC FLOW 
AROUND RIDGE PRODUCING FRESH TRADES FROM 8N-17N W OF 130W.  TWO WEAK 
TROUGH ALONG 118W AND 137W PRODUCING NO SIGNIFICANT CONVECTION AS 
PER DRY AIR MASS.

STORM FORCE WINDS OVER GULF OF TEHUANTEPEC ALLOWED TO EXPIRE AT 00 
UTC AS WIND DIMINISH TO GALE FORCE TONIGHT THEN TO BELOW GALE FORCE 
LATE WED.
 
E WINDS OF 20 KT IN AND DOWNSTREAM OF GULF OF PAPAGAYO EXPECTED TO 
DIMINISH SLIGHTLY BY THU.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE
  
$$
WALLY BARNES