000
AXPZ20 KNHC 020952
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU APR 02 2009

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 
0930 UTC.

...ITCZ...
AXIS EXTENDS FROM 08N82W TO 01N99W TO 02N135W TO 03N140W.  
ISOLATED MODERATE CONVECTION WITHIN 90 NM OF AXIS E OF 92W. 

...DISCUSSION...
LARGE AMPLITUDE UPPER LEVEL TROUGH MOVING ALONG JUST N OF ALONG 
136W DEVELOPING CUT OFF CYCLONE NEAR 28N137W.  MODEL GUIDANCE 
HAS CYCLONE MOVE SLIGHTLY N OF DUE E JUST FLATTENING DOWNSTREAM 
RIDGE CREST MAKING ZONAL WINDS DOMINATE UPPER LEVELS N OF 15N E 
130W.  WHILE CYCLONE ADVECT MOISTURE INTO E PAC...RIDGE SUBJECTS 
AIR MASS TO MODERATE TO STRONG SUBSIDENCE KEEPING MEAN LAYER DRY
S OF 18N E OF 115W...WITH THE EXCEPTION OF MINOR AMOUNTS OF 
MOISTURE OUT OF SOUTH AMERICA ALONG THE ITCZ SWATH E OF 92W.   

ELSEWHERE AT THE SURFACE...
SURFACE HIGH PRES 1037 MB NW OF BASIN SLIDES E DIMINISHING 
PRESENT FRESH TRADE WINDS AND INCREASING N-NW WINDS ALONG 
CALIFORNIA COAST FURTHER S INTO BAJA CALIFORNIA WATERS.  THESE 
WINDS ARE EXPECTED TO REACH GALE FORCE JUST N OF 30N E OF 127W 
WITH LARGE LONG PERIOD NW SWELLS ENCROACHING INTO E PAC BASIN E 
OF 130W N OF 26N.

$$
WALLY BARNES