000
AXPZ20 KNHC 252201
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED FEB 25 2009

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 
1515 UTC.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE...AXIS 06N77W TO 04N83W TO 
05N85W TO 04N102W TO 05N120W TO 04N140W. SCATTERED MODERATE 
CONVECTION WITHIN 180 NM N OF AXIS BETWEEN 125W AND 130W.

...DISCUSSION...

A MID/UPPER LEVEL RIDGE CENTERED ALONG ROUGHLY 110W COVERING THE 
BAJA PENINSULA IS FLATTENING OUT AS A VIGOROUS UPPER LOW PUSHES 
INTO WASHINGTON STATE. THIS IS ALSO CUTTING OFF ANOTHER UPPER 
LEVEL LOW CENTERED NE OF HAWAII NEAR 36N146W. AT THE 
SURFACE...1024 MB HIGH PRES IS CENTERED NEAR 29N123W. AN ASCAT 
PASS FROM 17Z SHOWS PERSISTENT 20 KT FLOW BETWEEN THE HIGH PRES 
AND THE BAJA COAST. THE HIGH PRES IS BLOCKING A WEAK SURFACE 
TROUGH FROM 30N135W TO 28N140W. THE UPPER PATTERN BECOMES MORE 
AMPLIFIED BY LATE THU AS UPPER ENERGY REINFORCES THE TROUGH AND 
OPENS UP THE THE CUTOFF LOW NE OF HAWAII...SUPPORTING 
DEVELOPMENT OF A WEAK COLD FRONT IN THE FAR NW DISCUSSION AREA 
BY EARLY FRI. WINDS OFF THE BAJA COAST DIMINISH AS THE SURFACE 
HIGH SHIFTS EASTWARD AHEAD OF THE REINFORCED TROUGH. MEANWHILE A 
LARGE SWATH OF NORTHERLY SWELL PUSHES SOUTHWARD MAINLY W OF 
125W. MEANWHILE PERSISTENT TRADES TO 25 KT CONTINUE S OF THE 
SURFACE HIGH...MAINLY S OF 15N. GAP WINDS ARE RAPIDLY 
DIMINISHING THROUGH THE GULF OF TEHUANTEPEC...AND MORE GRADUALLY 
THROUGH THE GULF OF PAPAGAYO. WEAK NORTHERLY WINDS THROUGH THE 
ISTHMUS OF PANAMA DIMINISH THROUGH 24 HOURS.

$$
CHRISTENSEN