000
AXPZ20 KNHC 271530
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT FEB 27 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...

AXIS IS ALONG 06N77W TO 08N95W TO 05N110W TO 03N125W TO 02N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION IS LOCATED WITHIN 
60 NM EITHER SIDE OF A 07N77W TO 06N85W LINE AND WITHIN 60 NM 
EITHER SIDE OF A 05N110W TO 05N121W LINE.

...DISCUSSION...

W OF 100W...
A MIDDLE/UPPER TROUGH COVERS THE PACIFIC WATERS N OF 25N E OF 
128W WITH THE AXIS ALONG 121W. FURTHER NORTH A WELL-DEFINED 
MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS CENTERED ALONG THE 
CENTRAL CALIFORNIA COAST. AN ASSOCIATED COLD FRONT EXTENDS 
THROUGH 32N120W TO 25N127W TO 21N140W WITH NW WINDS 20 TO 25 KT 
AND SEAS 14 TO 21 FT BEHIND IT. FLOW ALOFT IS BECOMING 
INCREASINGLY ANTICYCLONIC OVER THE NW PART OF THE DISCUSSION 
AREA WITH WATER VAPOR IMAGERY INDICATING STRONG SUBSIDENCE. A 
TROUGH WILL BE LOCATED ROUGHLY N OF 22N W OF 132W IN 48 HOURS. A 
JET STREAM ORIGINATES IN THE VICINITY OF 06N145W AND TURNS 
ANTICYCLONICALLY THROUGH 11N140W TO 22N125W TO THE MEXICAN COAST 
AT 18N. DENSE CIRRUS LIES ALONG AND UP TO 6 TO 7 DEGREES S OF 
THE JET AXIS WITH SATELLITE CLOUD DRIFT WINDS INDICATING UNIFORM 
SPEEDS UP TO 80 KT. AT THE SURFACE TRADES WINDS IN THE 20 TO 25 
KT RANGE ARE LOCATED FROM 06N TO 18N W OF 120W WITH SEAS FROM 8 
TO 12 FT IN MIXED NE AND NW SWELL. A 1024 MB HIGH IS CENTERED 
NEAR 29N144W AND WILL MOVE ENE ABOUT 20 KT OVER THE NEXT 24 
HOURS. 

E OF 100W...
MODERATE WESTERLY WINDS ALOFT COVER MOST OF THE AREA N OF 05N E 
OF 100W. A STORM WARNING HAS BEEN ISSUED FOR THE GULF OF 
TEHUANTEPEC BASED PRIMARILY ON A 50 KT SHIP REPORT. WINDS ARE 
FORECAST TO FALL BELOW WARNING CRITERIA IN 36 HOURS.

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

$$
CAB