000
AXPZ20 KNHC 270922
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT FEB 27 2010

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
AXIS IS ALONG 8N83W 9N90W 5N115W 4N140W. SCATTERED MODERATE 
CONVECTION WITHIN 60 NM EITHER SIDE OF AXIS FROM 116W TO 117W.

...DISCUSSION...
UPPER LEVEL TROUGH EXTENDS FROM 32N136W TO 25N130W TO 16N140W.
A 95 KT JETSTREAM ENTERS THE AREA NEAR 32N130W TO 30N125W THEN 
NE TO 32N120W. SCATTERED TO BROKEN HIGH CLOUDS ARE WITHIN 240 NM 
S OF THE JET. DOWNSTREAM RIDGE WITH AXIS FROM NW MEXICO NEAR THE 
SE ARIZONA/MEXICO BORDER ACROSS THE SOUTHERN TIP OF BAJA 
CALIFORNIA TO 22N113W. MODERATE TO STRONG SUBSIDENCE WITH DRY 
AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS OF THE ATMOSPHERE
IS FROM 20N-25N W OF 100W. A 70-90 SUBTROPICAL JETSTREAM EXTENDS 
FROM 14N140W TO 20N130W E TO 20110 WHERE WINDS INCREASE TO 
100-110 KT THEN INTO SOUTHERN MEXICO. BROKEN HIGH CLOUDS ARE 
WITHIN 600 NM S OF THE JET W OF 115W. UPPER LEVEL TROUGH FROM 
THE GULF OF MEXICO ACROSS SOUTHERN MEXICO INTO THE PACIFIC TO 
7N94W. STRONG SUBSIDENCE IS SUPPRESSING CONVECTION ALONG THE 
ITCZ E OF 110W. IN THE DEEP TROPICS AN UPPER LEVEL ANTICYCLONIC 
CIRCULATION IS CENTERED JUST N OF THE EQUATOR NEAR 1N101N WITH 
RIDGE EXTENDING FROM THE CIRCULATION NW TO 18N118W.

COLD FRONT FROM 32N133W TO 28N125W TO 24N133W. OVERCAST LOW TOP 
CLOUDS ARE WITHIN 30 NM E AND 60 NM W OF THE FRONT. LARGE SWELLS
ARE MOVING INTO THE AREA W OF THE FRONT...SEAS COULD BE UP TO 22 
FT OVER THE FAR NW PORTION OF THE DISCUSSION AREA. HIGH PRES 
BUILDING W OF A COLD FRONT CURRENTLY MOVING THROUGH THE GULF OF 
MEXICO WILL TIGHTEN THE PRES GRADIENT AND WINDS COULD BRIEFLY
REACH GALE FORCE IN THE GULF OF TEHUANTEPEC BY THIS EVENING.

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

$$
DGS