000
AXPZ20 KNHC 140237
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
0405 UTC TUE APR 14 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0030 UTC. 
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              

THE ITCZ AXIS WAS ANALYZED FROM 09N84W TO 03N100W TO 01N113W TO 
08N140W. SCATTERED MODERATE CONVECTION WAS S OF THE AXIS TO 04N 
BETWEEN 80W-93W. SCATTERED MODERATE CONVECTION WAS WITHIN 300 NM 
N AND 180 NM S OF AXIS W OF 130W.

...DISCUSSION... 

THE SUBTROPICAL RIDGE SHOULD GRADUALLY STRENGTHEN THROUGH THE 
END OF THE FORECAST PERIOD WED EVENING AS HIGH PRESSURE MOVES IN 
BEHIND A COLD FRONT CURRENTLY PUSHING INTO THE WESTERN U.S. 
TRADE WINDS SHOULD PICK UP TO A FRESH BREEZE OVER W WATERS TUE 
AS A RESULT...WITH WINDS EXPECTED TO REACH ADVISORY CRITERIA 
OVER THE AREA FROM 20N-25N W OF 130W TUE AFTERNOON THROUGH WED 
EVENING.

N-NW WINDS ALONG THE CALIFORNIA COAST COUPLED WITH NW SWELL 
ASSOCIATED WITH THE AFOREMENTIONED COLD FRONT N OF THE AREA ARE 
GENERATING SEAS OVER 8 FT IN E WATERS N OF 29N THIS EVENING. 8-9 
FT SEAS WILL GRADUALLY SPREAD S AND W ACROSS N WATERS THROUGH 
TUE. AT THE SAME TIME...THE PRESSURE GRADIENT WILL BUILD BETWEEN 
THE FRONT OVER THE INTERIOR WESTERN U.S. AND THE 1036 MB 
SUBTROPICAL HIGH NEAR 38N135W. WINDS TO GALE FORCE ARE EXPECTED 
N OF 31N...WITH N-NW WINDS TO ADVISORY CONDITIONS REACHING AS 
FAR S AS 29N OVERNIGHT TUE NIGHT. SEAS WILL QUICKLY BUILD 
OVERNIGHT TUE NIGHT FROM 8-10 FT TO 10-14 FT WED MORNING N OF 
29N BETWEEN 120W-125W. WINDS WILL DIMINISH BELOW ADVISORY 
CONDITIONS BY SUNRISE WED AS THE COLD FRONT CONTINUES E AWAY 
FROM THE AREA. 
 
AN UPPER LEVEL LOW NEAR THE GALAPAGOS ISLANDS HAS A RIDGE AXIS 
TO ITS NE EXTENDING ACROSS COLOMBIA TO 05N77W TO 09N85W. 
CONVECTION IS BEING ENHANCED ALONG THE EASTERN PORTION OF THE 
ITCZ AXIS AS A RESULT. MEANWHILE...AN ANTICYCLONE ALOFT NEAR 
07N120W EXTENDS A RIDGE AXIS TO BEYOND 09N140W. THE DIVERGENCE 
ALOFT ASSOCIATED WITH THIS RIDGE IS ENHANCING CONVECTION ON THE 
W END OF THE ITCZ. THIS CONVECTION IS DESCRIBED IN THE SECTION 
ABOVE.

GAP WINDS...                                                     
GULF OF CALIFORNIA...THE COLD FRONT MOVING THROUGH THE INTERIOR 
WESTERN U.S. WILL MOVE INTO THE NORTHERN GULF OF CALIFORNIA WED 
MORNING. N-NW WINDS WILL PICK UP TO NEAR GALE FORCE N OF 29N BY 
WED AFTERNOON BUT BEGIN TO DIMINISH WED EVENING. 

$$
SCHAUER