000
AXPZ20 KNHC 171535
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI MAR 17 2006

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1515 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 3N80W 6N92W 3N120W 5N140W. ISOLATED 
TSTMS FROM 4N-7N BETWEEN 91W-100W AND WITHIN 60 NM OF 7N83W.  
ITCZ AXIS REMAINS ILL-DEFINED. 

...DISCUSSION...

W OF 110W...
WEAK COLD FRONT ENTERS THE AREA NEAR 30N130W DISSIPATING TO 
26N140W. PATCHY STRATOCUMULUS CLOUDS ARE BEHIND THE FRONT WITH 
PERHAPS A SHOWER.  FRONT IS BEING SEND INTO THE REGION BY A 
STRONG UPPER TROUGH ALONG THE CALIFORNIA COAST SOUTHWARD INTO 
THE EPAC NEAR 25N122W.  UPPER JET RUNS FROM 25N140W 24N120W 
30N110W BRINGING A 400-500 NM WIDE SWATH OF HIGH CLOUDS ALONG 
THE JET.  BROKEN/OVERCAST LOW CLOUDS ARE WITHIN 120 NM W OF A 
WEAK SURFACE TROUGH FROM 14N116W TO 7N123W.  FARTHER E... UPPER 
TROUGH IS FROM 20N115W TO EQ120W WITH PLENTY OF UPPER 
SUBSIDENCE.  OTHERWISE CONDITIONS ARE PRETTY QUIET WITH UPPER 
RIDGING CONTROLLING THE AREA W OF 125W.  SWELLS TO ABOUT 12 FT 
ARE POSSIBLE IN THE FAR N PORTION.

E OF 110W...
BROAD UPPER RIDGING IS THE RULE WITH SOME MID-LEVEL TROUGHING 
FROM NEAR NICARAGUA TO 8N85W.  A FEW TSTMS ARE BEING TOUCHED OFF 
BY THE TROUGH NEAR THE ITCZ.  MODERATE/STRONG SUBSIDENCE 
DOMINATES ELSEWHERE.  20-25 KT WINDS REMAIN IN THE GULF OF 
PAPAGAYO WITH LITTLE CHANGE EXCEPT FOR DIURNAL FLUCTUATIONS.  
WINDS TO 20 KT ARE FORECAST IN THE GULF OF PANAMA FOR THE NEXT 
FEW DAYS...OTHERWISE CONDITIONS SHOULD BE RATHER QUIET FOR THIS 
TIME OF YEAR.  

$$
BLAKE