000
AXPZ20 KNHC 240922
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU DEC 24 2009

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
AXIS IS ALONG 4N78W 8N85W 4N105W 8N120W 8N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 120 NM N OF THE AXIS FROM 
121W AND 124W.

...DISCUSSION...
A SHARP UPPER LEVEL TROUGH OVER WESTERN PORTION OF THE 
DISCUSSION AREA...WITH AXIS FROM 32N128W TO 10N137W. AN UPPER 
LEVEL RIDGE IS BUILDING OVER THE FAR NW PORTION OF THE AREA W OF 
THE TROUGH AXIS. A NLY JETSTREAM IS W OF THE TROUGH FROM 32N140W 
TO 15N140W. A BROAD UPPER LEVEL RIDGE IS E OF THE TROUGH WITH 
AXIS FROM 32N118W TO 10N102W. A 90-95 KT JETSTREAM EXTENDS FROM 
13N132W TO 22N120W. SW WINDS BETWEEN THE RIDGE AND UPPER LEVEL 
TROUGH ARE ADVECTING TROPICAL MOISTURE NWD ACROSS THE RIDGE. A 
MID/UPPER LEVEL TROUGH FROM W TEXAS ACROSS NORTHERN MEXICO TO 
21N105W. A 105-120 KT JETSTREAM IS ACROSS NORTHERN MEXICO.
AN UPPER LEVEL TROUGH EXTENDS FROM THE NW CARIBBEAN ACROSS 
HONDURAS AND NICARAGUA TO 6N87W. MODERATE TO STRONG SUBSIDENCE 
WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS OF THE 
ATMOSPHERE S OF 15N E OF 110W HAS SUPPRESSED ITCZ CONVECTION
IN THIS AREA.

A SURFACE TROUGH IS ANALYZED ALONG THE ITCZ FROM 14N123W TO 1010 
MB NEAR 9N104W TO 5N104W. MODERATE TO STRONG CONVECTION IS WITHIN
180 NM E OF THE LOW...BUT IS MOSTLY ASSOCIATED WITH THE ITCZ.
OTHERWISE HIGH PRES RIDGE COVERS THE AREA N OF 17N W OF 110W. 
ELY TRADES OF 20 KT ARE ON THE ON THE SOUTHERN PERIPHERY OF THE 
RIDGE. LARGE SWELLS ARE ONCE AGAIN EXPECTED TO MOVE INTO THE NW 
PORTION OF THE AREA WITHIN 48 HOURS...AND COULD REACH 15-20 FT 
OVER THE FAR NW PORTION OF THE AREA.

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