000
AXPZ20 KNHC 161525
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE APR 16 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 8N82W TO 4N93W. ITCZ 4N93W 6N1100W 4N110W TO
1008 MB LOW PRES 6N116W TO 5N120W TO 6N130W TO 3N140W.
SCATTERED MODERATE TO STRONG WITHIN 200 NM N OF AXIS FROM
105W-108W. NUMEROUS MODERATE TO STRONG FROM 5N-10N BETWEEN
114W-124W.

...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 N OF 25N. AN UPPER LEVEL RIDGE
EXTENDS FROM AN ANTICYCLONIC CIRCULATION NEAR 9N113W TO 30N135W
ANTICYCLONIC FLOW COVERS OF THE AREA IS BETWEEN 105W-135W.
A 95-110 KT JETSTREAM OVER THE TOP OF THE RIDGE EXTENDS FROM
27N130W TO 29N120W TO SOUTHERN BAJA CALIFORNIA. DIFFLUENT
FLOW ALOFT IS ENHANCING NUMEROUS MODERATE TO STRONG CONVECTION
ALONG THE ITCZ FROM 5N-10N BETWEEN 114W-124W. MIDDLE AND HIGH
CLOUDS ARE WRAPING AROUND THE W SIDE OF THE ANTICYCLONE AND
RIDGE. A DOWNSTREAM UPPER LEVEL TROUGH EXTENDS FROM THE SW
U.S. THROUGH MEXICO TO 12N100W.

SURFACE HIGH PRES RIDGE IS N OF 15N W OF 115W. NLY SWELLS 8-10
FT ARE N OF 24N BETWEEN 116W-135W.

$$
DGS