000
AXPZ20 KNHC 251522
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 UTC WED MAR 11 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM  
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1515 UTC. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
 
MONSOON TROUGH IS NOT EVIDENT IN THE E PACIFIC REGION. THE ITCZ 
BEGINS NEAR 5N103W AND EXTENDS ALONG 7N118W 6N127W TO 6N140W. 
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS WITHIN 210 
NM N OF ITCZ FROM 116W TO 124W. SCATTERED MODERATE CONVECTION IS 
WITHIN 60 NM EITHER SIDE OF ITCZ BETWEEN 126W AND 130W...AND 
WITHIN 120 NM N OF ITCZ FROM 137W TO 140W. 

...DISCUSSION...                                                
A BROAD UPPER LEVEL RIDGE IS S OF 30N W OF 118W WITH A WEAK 
MID/UPPER LEVEL SHORT WAVE TROUGH MOVING THROUGH THE NW PORTION 
EXTENDING FROM 31N131W TO 25N137W. A BROAD UPPER LEVEL TROUGH IS 
E OF THE UPPER RIDGE N OF 24N E OF 118W TO OVER NW MEXICO. IN 
THE DEEP TROPICS AN UPPER LEVEL TROUGH EXTENDS FROM 16N98W ALONG 
6N98W THEN SE TO NEAR 1N92W. A SURFACE RIDGE COVERS THE AREA N 
OF 15N W OF 115W WITH A 1026 MB HIGH NEAR 33N130W. THE UPPER 
TROUGH S OF MEXICO IS SUPPORTING A SURFACE TROUGH THAT EXTENDS 
FROM 5N100W 3N97W TO 1N95W. SCATTERED MODERATE CONVECTION IS 
FROM 1N TO 7N BETWEEN 92W AND THE SURFACE TROUGH. 

ENTIRE AREA IS VOID OF STRONG WINDS WITH SOME AREA SWELLS BEING 
GENERATED. THE SURFACE RIDGE IS PRODUCING A WEAK PRESSURE 
GRADIENT WITH SWELLS TO 8 FT FROM 8N TO 13N W OF 120W THAT WILL 
SUBSIDE THIS AFTERNOON. THE SAME SURFACE RIDGE IS PRODUCING GALE 
FORCE WINDS N OF THE DISCUSSION AREA ALONG THE COAST OF 
CALIFORNIA GIVING THE AREA N OF 26N BETWEEN 115W AND 124W SWELLS 
TO 8 TO 10 FT. THESE SEAS WILL SUBSIDE THU MORNING. CROSS 
EQUATORIAL SWELLS TO 9 FT ARE REACHING TO 4N BETWEEN 95W AND 
122W. THESE SEAS WILL CONTINUE TO SPREAD NORTHWARD AS WELL AS E 
OF THE GALAPAGOS ISLANDS OVER THE NEXT COUPLE OF DAYS. A WAVE 
PERIOD OF 18 TO 20 SEC WILL REACH THE COAST OF CENTRAL AMERICA 
AND MEXICO BY THIS EVENING SPREADING N TO ALL OF BAJA CALIFORNIA 
BY THU EVENING. 

$$ 
PAW