000
AXPZ20 KNHC 291002
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU JAN 29 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 
0915 UTC.

...ITCZ...
AXIS ALONG 02N79W 04N90W 01N110W 01N137W 02N140W.
NO SIGNIFICANT CONVECTION.

...DISCUSSION...
UPPER LEVEL TROUGH PREVIOUSLY ACROSS WRN SIDE OF E PAC HAS BEEN 
LIFTED N BY BROAD MID-UPPER LEVEL RIDGE EXTENDING NE.  JET CORE 
80-90 KT TRAPPED BETWEEN FEATURES ADVECTING LEFTOVER DEEP 
CONVECTION DEBRIS NE TOWARDS SRN BAJA CALIFORNIA AND NW MEXICO.
RIDGE FORCING LARGE AREA OF MODERATE TO STRONG SUBSIDING AIR 
MASS MAINTAINING SURFACE VERY DRY WITH NO VERTICAL CLOUD 
DEVELOPMENT...NOT EVEN IN ITCZ.  

HIGH PRES 1040 MB CENTER AT 27N132W MOVES NE RELAXING GRADIENT 
OVER E PAC AND DIMINISHING WINDS ACROSS NRN WATER WHICH HAD GALE 
FORCE WINDS JUST 24 HRS AGO.  MEANTIME...WITH TIGHT GRADIENT 
STILL OVER ROCKY MOUNTAINS AREA...FUNNELED NW WINDS SEEP INTO 
GULF OF CALIFORNIA ALMOST REACHING GALE FORCE DURING NEXT 24 HRS 
THEN DIMINISH CONSIDERABLY.

GULF OF PAPAGAYO STRONG NE WINDS MIGHT HAVE A RESPITE AS HIGH 
PRES RETREATS OVER SW N ATLC FORCED BY STRONG COLD FRONT ACROSS 
N FLORIDA NOW...BUT RAPIDLY REBUILDS AND CONTINUE UNABATED FOR 
NEXT 48 HRS.       

GULF OF TEHUANTEPEC STRONG N WINDS RETURN WITHIN 36 HRS FORCED 
BY STRONG COLD FRONT NOW ACROSS BAY OF CAMPECHE IN GULF OF 
MEXICO.  BY FRI NIGHT WINDS REACH GALE FORCE...WITH OCCASIONAL 
GUSTS TO STORM FORCE...AND LAST THROUGH FORECAST PERIOD. 

$$
WALLY BARNES