000
AXPZ20 KNHC 192138
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED MAY 19 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 
2115 UTC.

...TROPICAL WAVES...
TROPICAL WAVE ALONG 81W N OF 02N MOVING W AT 10 KT. PLENTY OF 
DEEP STRONG CONVECTION WITHIN 180 NM OF WAVE N OF 04N. NO 
CYCLONIC ORGANIZATION NOTED AT THIS TIME BUT SYSTEM CONTINUES TO 
BE WELL MONITORED FOR ANY SIGNS OF DEVELOPMENT.

TROPICAL WAVE FROM 03N100W TO 12N96W MOVE W AT 15 KT. SCATTERED 
MODERATE ISOLATED STRONG WITHIN 180 NM W OF WAVE FROM 05N TO 11N.

TROPICAL WAVE FROM 06N126W TO 09N122W MOVING W AT 15 KT. LITTLE 
CONVECTION IS ASSOCIATED WITH THIS WAVE.

...ITCZ...
AXIS ALONG 06N77W TO 10N107W TO 05.5N116W TO 08N126W TO 05N140W. 
ISOLATED MODERATE WITHIN 90 NM OF AXIS BETWEEN 82W AND 95W. 

...DISCUSSION...
IN THE UPPER LEVELS...A SERIES OF SHORT WAVE TROUGHS AND RIDGES 
PREVAILS N OF 20N. ANTICYCLONE CENTERED NEAR 13N94W IS ADVECTING 
TROPICAL MOISTURE...MOSTLY ITCZ CONVECTIVE DEBRIS...INTO CENTRAL 
AMERICA AND THE WESTERN CARIBBEAN. RIDGE EXTENDS FROM THIS 
ANTICYCLONE TO 10N83W...AND ALONG 10N AS FAR W AS 140W. 

ELSEWHERE AT THE SURFACE...
HIGH PRESSURE 1025 MB CENTERED NEAR 28N136W. THE PRESSURE 
GRADIENT BETWEEN THIS FEATURE AND THE ITCZ IS MAINTAINING FRESH 
TRADES FROM 05N TO 18N W OF 125W. A TIGHT PRESSURE GRADIENT IS 
ALSO PRESENT BETWEEN THE HIGH PRESSURE AND A TROUGH OVER MEXICO 
AND IS PRODUCING FRESH TO STRONG NW TO N WINDS WITHIN 180 NM OFF 
W COAST OF BAJA CALIFORNIA.

CROSS-EQUATORIAL LONG PERIOD SW SWELL WILL REACH MUCH OF THE E 
PAC E OF 120W AND COASTLINE WITH HEIGHTS IN THE 8-11 FT RANGE BY 
FRI AND BEYOND. 

$$
AL/WALLY BARNES