000
AXPZ20 KNHC 160918
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
10405 UTC THU APR 16 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC. 
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              

TROUGH FROM 6N82W TO LOW PRES NEAR 4N92W 1011 MB TO N100W. ITCZ 
FROM 2N102W TO TO 1N135W TO 2N140W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION FROM 2N-6W BETWEEN 80W-100W.

...DISCUSSION... 

AN UPPER LEVEL TROUGH OVER THE FAR NW PORTION OF THE AREA 
EXTENDS FROM A CYCLONIC CIRCULATION NEAR 29N134W TO 21N132W. 
OTHERWISE MOSTLY ZONAL UPPER LEVEL FLOW WITH A 100-120 KT 
JETSTREAM EXTENDING FROM 22N140W TO 18N129W. A 95-115 KT JET IS 
FROM 23N118W TO THE SOUTHERN BAJA PENINSULA. IN THE DEEP TROPICS 
A BROAD UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONIC 
CIRCULATION CENTERED NEAR 10N107W WITH RIDGE TO SOUTHERN MEXICO  
STRONG SUBSIDENCE WITH DRY AIR AT THE MIDDLE AND UPPER LEVELS IS 
N OF 25N W OF 115W.

SURFACE HIGH PRESSURE RIDGE DOMINATES THE ARE N OF 115N W OF 
113W. STRONG WINDS ALONG THE COAST OF SOUTH-CENTRAL CALIFORNIA 
ARE GENERATING LARGE NORTHERLY SWELL...PROPAGATING SOUTHWARD 
INTO AREA N OF 25N. WINDS WILL DIMINISH WITH NORTHERLY SWELL 
SLOWLY DECAYING THROUGH THE END OF THE WEEK.

FRESH TRADE WINDS SW OF THE RIDGE AXIS ARE SUPPORTING AN AREA OF 
8-9 FT COMBINED SEAS ACROSS WEST-CENTRAL PORTION OF THE AREA. 
THE RIDGE WILL SLOWLY WEAKEN AND SHIFT SW THROUGH THE END OF THE 
WEEK ALLOWING WINDS AND SEAS TO SUBSIDE THROUGH THE WEEKEND. 

$$
DGS