000
AXPZ20 KNHC 181548
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI FEB 18 2011

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
AXIS IS ALONG 5N78W 4N90W THEN RESUMES FROM 00N110W 6N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 150 NM N OF 
AXIS FROM 129W-134W.

...DISCUSSION...
UPPER LEVEL TROUGH OVER THE W PORTION OF THE DISCUSSION AREA 
EXTENDS FROM 32N125W 18N127W TO 8N140W. A NLY 125-140 KT JET 
STREAM ON THE W SIDE OF THE TROUGH AXIS FROM 32N136W TO 26N127W 
THEN 100-120 KT SLY JET FROM 26N125W TO 32N117W. DENSE HIGH 
CLOUDS ARE WITHIN 150 NM SE OF JET FROM 27N123W TO 32N118W. 
DOWNSTREAM AN UPPER LEVEL RIDGE EXTENDS FROM NE MEXICO TO 
10N100W. STRONG SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE AND 
UPPER LEVELS COVERS THE AREA S OF 20N E OF 115W. AN UPPER LEVEL 
TROUGH FROM THE YUCATAN PENINSULA THROUGH THE GULF OF 
TEHUANTEPEC TO 11N95W.

DISSIPATING COLD FRONT FROM 32N126W TO 25N132W. NW WINDS 20 KT 
WITH SEAS 12-15 FT W OF THE FRONT. A 1017 MB HIGH PRES CENTERED 
OFF THE COAST OF BAJA CALIFORNIA NEAR 26N116W. WEAK PRES 
GRADIENT IS LEADING TO LIGHTER THEN NORMAL TRADES...IN THE 10-15 
KT RANGE. ELY WINDS TO 20 KT ARE BLOWING THROUGH THE GULF OF 
PAPAGAYO. N TO NE WINDS ARE EXPECTED THROUGH THE GULF OF 
PAPAGAYO STARTING SAT MORNING. OTHERWISE LARGE NW SWELL ACROSS 
THE DISCUSSION AREA N OF 10N W OF 115W.
 
$$
DGS