000
AXPZ20 KNHC 171526
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED APR 17 2013

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 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH 7N77W TO 6N115W TO 00N124W. SCATTERED
MODERATE TO STRONG FROM 2N-7N E OF 84W AND FROM 2N-10N
BETWEEN 95W-112W. 

...DISCUSSION... 
AN UPPER  LEVEL CYCLONIC CIRCULATION IS LOCATED OVER THE FAR
NW PORTION OF THE DISCUSSION AREA CENTERED NEAR 29N139W.
MODERATE TO STRONG SUBSIDENCE WITH DRY AND STABLE AIR AT THE
MIDDLE AND UPPER LEVELS IS W OF 130W. AN UPPER LEVEL RIDGE
EXTENDS FROM AN ANTICYCLONIC CIRCULATION NEAR 13N109W TO
CENTRAL BAJA CALIFORNIA. ANTICYCLONIC FLOW COVERS OF THE AREA
E OF 125W. A 95-110 KT JETSTREAM OVER THE TOP OF THE RIDGE
EXTENDS FROM 24N129W NORTHERN BAJA CALIFORNIA WHERE WINDS
INCREASE TO 130 KT. DIFFLUENT FLOW ALOFT IS ENHANCING 
CONVECTION S OF THE ANTICYCLONE FROM FROM 4N-10N BETWEEN
105W-112W. MIDDLE AND HIGH CLOUDS ARE WRAPING AROUND THE W
AND NW SIDE OF THE ANTICYCLONE AND RIDGE.

SURFACE HIGH PRES RIDGE IS N OF 15N W OF 115W. NLY SWELLS 8-12
FT ARE N OF 24N BETWEEN 115W-135W.

$$
DGS