000
AXPZ20 KNHC 260920
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI FEB 26 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 6N77W 7N85W 3N100W 6N115W 3N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION WITHIN 150 NM N OF AXIS FROM 
122W TO 135W.

...DISCUSSION...
A BROAD UPPER LEVEL TROUGH IS ENTERING THE FAR NW PORTION OF THE 
DISCUSSION AREA. A 130-140 KT JET STREAM IS ALONG 32N W OF 134W.
AN UPPER LEVEL RIDGE IS E OF THE TROUGH EXTENDING FROM  32N120W
TO 25N125W. MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE AIR AT 
THE MIDDLE AND UPPER LEVELS OF THE ATMOSPHERE IS FROM 15N-25N W 
OF 115W. UPPER LEVEL DIFFLUENT FLOW IS ENHANCING CONVECTIVE 
ACTIVITY ALONG ITCZ FROM 122W TO 135W. AN UPPER LEVEL TROUGH 
WITH AXIS FROM THE BIG BEND OF TEXAS ACROSS NORTHERN MEXICO TO 
13N115W. AN EAST TO WEST RIDGE EXTENDS FROM COLOMBIA ACROSS 
PANAMA AND COSTA RICA TO 4N100W. A 90-110 KT JET STREAM FROM
18N187W ACROSS CENTRAL MEXICO.

COLD FRONT OVER THE NW PORTION OF THE AREA FROM 32N133W TO 
27N140W A FEW LIGHT SHOWERS ARE ALONG THE FRONT. STRONG WLY 
WINDS AREA W OF THE FRONT...AND VERY LARGE SWELLS ARE MOVING 
INTO THE AREA BEHIND THE FRONT. A 1022 MB SURFACE HIGH PRES IS 
CENTERED NEAR 27N127W...WITH RIDGE N OF 14N W OF 110W. PRES 
GRADIENT S OF THE HIGH IS PRODUCING 20-25 KT WINDS FROM 5N-20N W 
OF 120W. 

WITH THE SURFACE COLD FRONT REACHING AS FAR AS COSTA RICA IN THE 
SW CARIBBEAN...WINDS FUNNELING INTO THE GULF OF PAPAGAYO HAVE 
INCREASED TO 20 KT. AS THE COLD FRONT OVER THE SW CARIBBEAN 
WEAKENS AND DISSIPATES...WINDS FUNNELING INTO THE GULF OF 
PAPAGAYO WILL DECREASE...AND WINDS WILL DIMINISH BELOW 20 KT FRI 
NIGHT. 

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

$$
DGS