000
AXPZ20 KNHC 211515
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED MAY 21 2014

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 FROM 8N78W TO 1011 MB LOW PRES 11N104W TO 1011 MB 
LOW PRES AT 13N117W. ITCZ FROM 9N120W TO 8N130W TO 6N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION N OF 7N E OF 80W 
AND FROM 2N-15N BETWEEN 98W-107W. 

...DISCUSSION...                                       

AN UPPER LEVEL RIDGE OVER THE NW PORTION OF THE DISCUSSION AREA 
IS N OF 15N W OF 130W. A BROAD UPPER LEVEL TROUGH E OF THE RIDGE 
IS N OF 20N BETWEEN 115W AND 130W. STRONG SUBSIDENCE WITH DRY 
AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF 17N W OF 
110W. AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED NEAR 
13N97W WITH A RIDGE FROM THE ANTICYCLONIC CIRCULATION NE ACROSS  
SOUTHERN MEXICO INTO THE GULF OF MEXICO.

A BROAD SURFACE RIDGE N OF 15N W OF 112W. NE WINDS ARE GENERALLY 
AROUND 15 KT AROUND THE PERIPHERY OF THIS RIDGE.

THE LOW PRES AT 11N104W IS EXPECTED TO DRIFT W-NW THROUGH THE 
WEEKEND. THE LOW PRES NEAR 13N117W IS EXPECTED TO REMAIN QUASI-
STATIONARY AND GRADUALLY DISSIPATE. 

GULF OF TEHUANTEPEC...THE NOCTURNAL NORTHERLY DRAINAGE FLOW HAS 
20 TO 25 KT TONIGHT AND WILL WEAKEN TO A 15 KT BY THIS EVENING.

$$
DGS