000
AXPZ20 KNHC 052203
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC TUE JAN 05 2010

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...
AXIS ALONG 04N78W TO 08N113W TO 07N126W TO 08N135W TO 06N140W.
NO SIGNIFICANT CONVECTION.

...DISCUSSION...
LARGE AMPLITUDE TROUGH FROM 32N110W TO 10N126W BEING FORCE NE BY 
BROAD UPSTREAM MID TO UPPER LEVEL RIDGE.  BOTH SYSTEMS MAINTAIN AREA 
S OF 22N W OF 123W FAIRLY DRY AND STABLE.  ABUNDANT TROPICAL 
MOISTURE ADVECTED NE TOWARDS MEXICO ON SW FLOW SE OF THE TROUGH. 
LARGE AREA OF MOIST AIR MOVES INTO REGION N OF 22N W OF 120W 
PROMPTED BY UPPER LEVEL SHORT WAVE NEAR 30N140W USHERING 150 KT 
JETSTREAM W OF ITS AXIS.  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 1024 MB AT 32N125W WITH 
ASSOCIATED RIDGE EXTENDING N OF 15N W OF 115W.  ANTICYCLONIC FLOW 
AROUND RIDGE PRODUCING FRESH TRADES FROM 8N-17N W OF 115W.  TWO WEAK 
TROUGH ALONG 117W AND 135W PRODUCING NO SIGNIFICANT CONVECTION AS 
PER DRY AIR MASS.

STORM FORCE WINDS OVER GULF OF TEHUANTEPEC EXPECTED TO DECREASE TO 
GALE FORCE TONIGHT THEN TO BELOW GALE FORCE LATE WED.
 
E WINDS OF 20 KT IN AND DOWNSTREAM OF THE GULF OF PAPAGAYO EXPECTED 
TO CONTINUE THROUGH THU.

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