000
AXPZ20 KNHC 241005
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED JAN 24 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0845 UTC.

...ITCZ...
ITCZ AXIS ALONG 3N77W  9N106W  5N119W  4N140W.
NO SIGNIFICANT CONVECTION.

...DISCUSSION...
OMEGA BLOCK CENTERED OVER CALIFORNIA WELL ANCHORED IN PLACE 
SHOULD FORCE WESTERNMOST UPPER LEVEL TROUGH NOW ALONG 140W MORE 
NE REESTABLISHING HIGH PRES ALOFT OVER FORECAST BASIN N OF 20N.  
EASTERN TROUGH OVER GULF OF CALIFORNIA HAS STRONG JET CORE NEAR 
100 KT ADVECT ABUNDANT TROPICAL MOISTURE ACROSS CENTRAL AND 
NORTHERN MEXICO INTO SW CONUS AND CENTRAL PLAINS.

ELSEWHERE S OF 20N UPPER LEVEL WINDS REMAIN SEMI-ZONAL W OF 115W 
WITH NO SIGNIFICANT WEATHER FEATURES TO DEVELOP ALONG ITCZ.  

AT THE SURFACE...COLD FRONT APPROACHING NW CORNER OF EPAC BASIN
LOSES UPPER SUPPORT FROM DEEP LAYER TROUGH AND STALLS ALONG 
30N130W TO 26N140W.  LARGE SWELLS FOLLOW FRONT WILL SPILL ACROSS 
E PAC TO THE EQUATOR W OF 115W.

STRONG N TO NE WINDS OVER GULF OF CALIFORNIA SUBSIDE BY EARLY 
THU AS HIGH PRES CENTER APPROACHES FORCED E BY COLD FRONT NEAR 
140W.

GULF OF TEHUANTEPEC...COLD FRONT ACROSS GULF OF MEXICO FORCES 
COLD NORTHERLIES ACROSS ISTHMUS INCRESING WINDS OVER GULF OF 
TEHUANTEPEC UP TO GALE FORCE WIND BY MID DAY THU.  
 
FURTHER SE...CARIBBEAN TRADES ENHANCED BY COLOMBIAN 1007 MB LOW 
PRES SPILL OVER CENTRAL AMERICA INTO GULF OF PAPAGAYO THROUGH 
FORECAST PERIOD.

$$
WALLY BARNES