000
AXPZ20 KNHC 302202
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT JAN 30 2010

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2115 UTC.

...ITCZ...

THE ITCZ AXIS IS ANALYZED ALONG 06N77W TO 03N87W TO 06N105W TO 
04N113W TO 05N126W TO 03N134W TO 03N140W. NO SIGNIFICANT 
CONVECTION.

...DISCUSSION...

W OF 100W...
A BROAD MIDDLE/UPPER LEVEL RIDGE IS LOCATED ROUGHLY N OF 16N W 
OF 124W AND IS FORECAST TO SHIFT E AS A MIDDLE/UPPER LEVEL 
TROUGH ENTERS THE NW PART OF THE DISCUSSION AREA IN ABOUT 36 
HOURS. DOWNSTREAM A MIDDLE/UPPER LEVEL TROUGH IS TILTED NORTH 
NORTHWEST TO SOUTH SOUTHEAST WITH THE AXIS LOCATED THROUGH 
32N115W TO 08N105W...AND APPEARS ON WATER VAPOR IMAGERY THIS IT 
IS BEGINNING TO LIFT NE OVER THE DOWNSTREAM RIDGE OVER THE GULF 
OF MEXICO. A JET EXTENDS FROM THE BASE OF THE TROUGH NEAR 
09N108W AND THEN ACCELERATES E OF THE TROUGH ACROSS MEXICO... 
WITH UPPER LEVEL WIND MAXIMUMS TO 100 KT ACROSS THE N GULF OF 
MEXICO. WATER VAPOR IMAGERY INDICATES STRONG SUBSIDENCE OVER A 
VAST AREA S OF 25N TO THE EQUATOR W OF 110W. AT THE SURFACE A 
1018 MB HIGH WAS LOCATED NEAR 35N128W AND IS FORECAST TO 
DISSIPATE IN 24 HOURS. SURFACE TROUGHS/PERTURBATIONS EMBEDDED 
WITHIN THE ITCZ WERE LOCATED ALONG 105W/106W S OF 08N AND ALONG 
126W/127W S OF 09N. A DISSIPATING FRONTAL TROUGH WAS LOCATED 
THROUGH 30N122W TO 25N130W. SEAS ARE IN THE 12 TO 14 FOOT RANGE 
N OF 22N W OF 122W WITH NORTHWEST SWELLS PERSISTING OVER THIS 
AREA. NORTHEAST TRADES FROM 20 TO 25 KNOTS WERE CONFINED TO S OF 
16-20N W OF 122W...AND 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 BETWEEN 0300-0600 UTC AND 
DROP BELOW GALE FORCE IN 48 HOURS. GAP WINDS IN THE GULF OF 
PAPAGAYO ARE 20 TO 25 KNOTS AND WILL PULSE UP AND DOWN OVER THE 
NEXT 48 HOURS..

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

$$
STRIPLING