000
AXPZ20 KNHC 292216
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI JAN 29 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 WAS ANALYZED ALONG 06N79W TO 04N85W TO 06N100W TO 
04N112W TO 06N120W TO 03N140W. SCATTERED MODERATE CONVECTION WAS 
OCCURRING FROM 06N TO 09N BETWEEN 101W AND 115W. 

...DISCUSSION...

W OF 105W...
A STRONG MIDDLE/UPPER LEVEL TROUGH LOCATED OFF THE W COAST OF 
THE UNITED STATES EXTENDS SOUTHWARD TO 27N BETWEEN 120W AND 135W 
WITH THE AXIS ORIENTED FROM NORTHWEST TO SOUTHEAST THROUGH 
36N126W TO 27N125W. ASSOCIATED COLD FRONT IS LOCATED THROUGH 
30N129W TO 25N140W. A SHARP MIDDLE/UPPER LEVEL RIDGE IS LOCATED 
AHEAD OF THE TROUGH WITH THE AXIS ALONG 114W N OF 28N. FURTHER 
DOWNSTREAM A MIDDLE/UPPER LEVEL TROUGH COVERS MEXICO N OF 23N 
AND CONTINUES INTO THE PACIFIC FROM ABOUT 15N TO 23N BETWEEN 
108W AND 120W. WATER VAPOR IMAGERY SHOWS SUBSIDENCE OVER MOST OF 
THE AREA W OF ABOUT 115W AND IS STRONGEST FROM 05N TO 18N W OF 
125W. STRONG WESTERLIES ALOFT WILL CONTINUE N OF ABOUT 18N OVER 
THE NEXT TWO DAYS. MODERATE TO STRONG WESTERLY WINDS ALOFT ARE 
ALSO LOCATED OVER THE DEEP TROPICS S OF 06N W OF 115W. WINDS 
THEN TURN SOUTHWESTERLY BETWEEN 105W AND 115W S OF ABOUT 18N 
WITH SATELLITE CLOUD DRIFT WINDS INDICATING SPEEDS AS HIGH AS 60 
KNOTS. AT THE SURFACE A 1019 MB HIGH IS LOCATED AHEAD OF THE 
COLD FRONT MENTIONED ABOVE NEAR 32N120W AND IS FORECAST TO 
DISSIPATE WITHIN 24 HOURS. A 1021 MB HIGH IS LOCATED W OF THE 
FRONT NEAR 30N141W AND IS FORECAST TO MOVE ENE TO NEAR 33N132W 
IN 24 HOURS. NORTHWESTERLY SWELLS AS HIGH AS 20 FEET ARE LOCATED 
OVER THE NW PART OF THE DISCUSSION AREA. NORTHEAST TRADE WINDS 
WERE DEPICTED BY EARLY AFTERNOON SCATTEROMETER PASSES OF 20 TO 
25 KNOTS FROM 05N TO 16N W OF 127W. A PERTURBATION MOVING ALONG 
THE ITCZ NEAR 115W WAS ALSO ACCOMPANIED BY A NE TO E 20 TO 25 KT 
WIND FLOW...MOVING W.

E OF 105W...
MODERATE TO OCCASIONAL STRONG WESTERLY TO SOUTHWESTERLY WINDS 
ALOFT ARE LOCATED E OF 105W. STRONG SUBSIDENCE IS LOCATED E OF 
ABOUT 95W INTO CENTRAL AND SOUTH AMERICA. GAP WINDS CONTINUE 
OVER THE GULF OF PAPAGAYO AND THE GULF OF PANAMA. GALES ARE  
FORECAST THROUGH THE GULF OF TEHUANTEPEC BY 00Z SUNDAY AS HIGH 
PRES BUILDS ACROSS THE GULF OF MEXICO.

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

$$
STRIPLING