000
AXPZ20 KNHC 052202
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON APR 05 2010

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
AXIS ALONG 07N78W TO 02N98W TO 02N120W TO 04N140W.  ISOLATED 
MODERATE CONVECTION WITHIN 90 NM OF AXIS E OF 100W.  SCATTERED 
MODERATE CONVECTION WITHIN 180 NM OF AXIS W OF 130W.     

...DISCUSSION...
TAIL END OF LONG WAVE UPPER LEVEL TROUGH EXTEND FROM 32N125W TO 
25N140W.  WELL DEFINED ANTICYCLONE FOLLOWS IT CLOSELY UPSTREAM 
NEAR 28N139W MAINTAINING DRY AIR MASS DUE TO MODERATE SUBSIDENCE 
IN CONFLUENT FLOW.  FURTHER S...MID TO UPPER LEVEL RIDGE 
ANCHORED AT TWO ANTICYCLONES...ONE AT 09N87W AND ANOTHER AT 
08N113W.  WIND FLOW IN BETWEEN TROUGH AND RIDGE REMAINS 
QUASI-ZONAL WITH LITTLE DISTURBANCES IN BETWEEN.  AIR MASS 
REMAINS FAIRLY STABLE WITH ABSENCE OF LOW LEVEL UPLIFT 
MECHANISMS TO PROMPT ANY SIGNIFICANT CONVECTION.  MINOR 
DIFFLUENCE ALOFT S OF 08W W OF 138W ALLOWS SCATTERED MODERATE 
CONVECTION ALONG ITCZ.

ELSEWHERE AT THE SURFACE...
WEAK SURFACE TROUGH EMBEDDED IN ITCZ ALONG 139W BOUND TO MOVE 
OUT OF BASIN TONIGHT WITH NO SIGNIFICANT EFFECTS ON WIND OR SEAS.

WEAK COLD FRONT 32N119W TO 26N135W PRODUCING FRESH N-NE WINDS 
WHICH DIMINISH BELOW 20 KT LATE TONIGHT.  BROAD HIGH PRES 1031 
MB WELL NW OF BASIN MOVES E AND STRENGTHENS INCREASING FRESH 
BREEZE FROM 07N-20N W OF 125W AND JUST OFF W COAST OF BAJA 
CALIFORNIA.  HIGH PRES EVENTUALLY IMPACTS GULF OF CALIFORNIA 
WITH N-NW FRESH BREEZE THROUGH END OF FORECAST PERIOD. 

GAP WINDS...
GULF OF PAPAGAYO GETTING A BURST OF FRESH E-NE BREEZE DUE TO 
INCREASE IN PRES GRADIENT OVER WESTERN CARIBBEAN...BUT SHORT 
LIVED AS GRADIENT RELAXES BY TUE. 

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

$$
WALLY BARNES