000
AXPZ20 KNHC 301523
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT JAN 30 2010

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...

THE ITCZ AXIS IS ANALYZED ALONG 06N78W TO 03N90W TO 05N105W TO 
05N120W TO 03N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...

W OF 100W...
A BROAD MIDDLE/UPPER LEVEL RIDGE IS LOCATED ROUGHLY N OF 20N W 
OF 128W AND IS FORECAST TO SHIFT E AS A MIDDLE/UPPER LEVEL 
TROUGH ENTERS THE NW PART OF THE DISCUSSION AREA IN ABOUT 36 
HOURS. STRONG WESTERLIES ALOFT CONTINUE ACROSS THE AREA N OF 20N 
WITH SATELLITE CLOUD DRIFT WINDS INDICATING SPEEDS AS HIGH AS 
100 KNOTS. A MIDDLE/UPPER LEVEL TROUGH IS TILTED NORTH NORTHWEST 
TO SOUTH SOUTHEAST WITH THE AXIS LOCATED THROUGH 32N118W TO 
12N110W. A JET EXTENDS FROM THE BASE OF THE TROUGH NEAR 12N110W 
ACROSS THE MEXICAN COAST AT 19N104W. WATER VAPOR IMAGERY 
INDICATES STRONG SUBSIDENCE OVER A VAST AREA S OF 25N TO THE 
EQUATOR W OF 110W. AT THE SURFACE A 1020 MB HIGH IS LOCATED NEAR 
32N132W AND IS FORECAST TO DISSIPATE IN 24 HOURS. SURFACE 
TROUGHS ARE LOCATED ALONG 105W/106W S OF 08N AND ALONG 124W/125W 
S OF 09N. A FRONTAL TROUGH IS LOCATED THROUGH 32N124W TO 
27N129W. SEAS ARE IN THE 12 TO 16 FOOT RANGE N OF 22N W OF 125W 
WITH NORTHWEST SWELLS PERSISTING OVER THIS AREA. A 0810 UTC 
ALTIMETER PASS MEASURED 14 FOOT SEAS NEAR 29N138W. NORTHEAST 
TRADES FROM 20 TO 25 KNOTS WILL CONTINUE OUT TO 48 HOURS. 

E OF 100W...
MODERATE WESTERLY TO SOUTHWESTERLY WINDS ALOFT ARE LOCATED OVER 
THE AREA E OF 100W. MINIMAL GALE CONDITIONS ARE FORECAST TO 
BEGIN OVER THE GULF OF TEHUANTEPEC IN 12 HOURS AND DROP BELOW 
GALE FORCE IN 48 HOURS. GAP WINDS IN THE GULF OF PAPAGAYO ARE 20 
TO 25 KNOTS.

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

$$
CAB