000
AXPZ20 KNHC 301524
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN MAY 30 2010

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 
1500 UTC.

...ITCZ...
AXIS IS ALONG 13.5N89W TO 07N105W TO 08.5N117W TO 05.5N125W TO 
07.5N136W TO 07N140W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 
120 NM N OF AXIS E OF 10N. SCATTERED MODERATE CONVECTION WITHIN 90 
NM S OF AXIS BETWEEN 103W AND 109W. SCATTERED MODERATE TO STRONG 
CONVECTION WITHIN 150 NM N OF AXIS AND 60 NM S OF AXIS BETWEEN 109W 
AND 117W. 

...DISCUSSION...
BROAD TROUGHING PREVAILS OVER THE FORECAST AREA N OF 23N. TO THE 
SOUTH OF THIS FEATURE...THE SUBTROPICAL JET STREAM...WITH WINDS UP 
TO 70 KT...EXTENDS ACROSS THE AREA FROM 15N140W NE TO 22N130W...THEN 
E TO CENTRAL MEXICO. SE OF THE JET IN THE DEEP TROPICS IS AN 
ANTICYCLONIC CIRCULATION CENTERED NEAR 13N125W...WITH RIDGE 
EXTENDING E ACROSS THE AREA ALONG 10N.

SURFACE HIGH PRES 1028 MB CENTERED NEAR 31N138W HAS RIDGE EXTENDING 
SE TO 16N114W. THE PRES GRADIENT BETWEEN THE RIDGE AND THE ITCZ IS 
PRODUCING 20 KT TRADES FROM 07N TO 20N W OF 130W. ADDITIONALLY THE 
PRES GRADIENT BETWEEN THE HIGH PRESSURE AND LOW PRESSURE CENTERED 
OFF THE COAST OF SOUTHERN CALIFORNIA IS PRODUCING 20 KT NW TO N 
WINDS N OF 27N BETWEEN 120W AND 129W. 

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AL