000
AXPZ20 KNHC 060331
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE APR 06 2010

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...ITCZ...

AXIS ALONG 08N78W TO 02N100W TO 02N122W TO 05N140W. 
ISOLATED MODERATE CONVECTION WITHIN 120 NM OF AXIS FROM 83W-88W. 
SCATTERED MODERATE CONVECTION WITHIN 90 NM S OF AXIS W OF 132W.

...DISCUSSION...

TAIL END OF LONG WAVE UPPER LEVEL TROUGH EXTEND FROM 32N120W TO 
25N140W.  WELL DEFINED ANTICYCLONE FOLLOWS IT CLOSELY UPSTREAM 
NEAR 28N136W MAINTAINING DRY AIR MASS DUE TO MODERATE SUBSIDENCE 
IN CONFLUENT FLOW.  FURTHER S MID TO UPPER LEVEL RIDGE ANCHORED 
AT TWO ANTICYCLONES...ONE AT 10N89W AND ANOTHER AT 08N114W.  
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 140W BOUND TO MOVE 
OUT OF BASIN TONIGHT WITH NO SIGNIFICANT EFFECTS ON WIND OR SEAS.

DISSIPATING COLD FRONT 309N115W TO 28N125W PRODUCING FRESH N-NE 
WINDS WHICH DIMINISH BELOW 20 KT TONIGHT.  BROAD REBUILDING HIGH 
PRES 1030 MB WELL NW OF BASIN MOVES E AND 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 ON SECOND HALF OF FORECAST PERIOD. 

GAP WINDS...
GULF OF PAPAGAYO GETTING 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