000
AXPZ20 KNHC 220925
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU MAY 22 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0815 UTC. 
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
 
MONSOON TROUGH EXTENDS FROM 09N84W TO 08N90W TO LOW PRES 10N106W 
1011 MB TO 10N110W TO LOW PRES 14N118W 1012 MB. ITCZ EXTENDS  
FROM 10N120W TO 08N130W TO 08N140W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION IS S OF THE MONSOON TROUGH FROM 02N TO 07N 
BETWEEN 88W AND 100W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION IS WITHIN 240 NM OF THE LOW AT 10N106W.

THE LOW PRESSURE AT 10N106W IS EXPECTED TO DRIFT W-NW THROUGH  
THE WEEKEND WITH SOME GUIDANCE SUGGESTING DEEPENING OF THE LOW 
NEAR 13N111W ON SAT NIGHT INTO SUN. THE LOW PRESSURE NEAR 
14N118W IS EXPECTED TO REMAIN QUASI-STATIONARY AND GRADUALLY 
LOSE IDENTITY IN THE MONSOON TROUGH.

...DISCUSSION...                                       

IN THE UPPER LEVELS...

AN UPPER LEVEL RIDGE IS W OF 130W. A BROAD UPPER LEVEL TROUGH 
WITH STRONG SUBSIDENCE IS N OF 20N BETWEEN 110W AND 130W TO 
INCLUDE BAJA CALIFORNIA.  A LARGE UPPER LEVEL HIGH IS CENTERED 
NEAR 12N100W. ANTICYCLONIC FLOW IS E OF 110W WITH SIGNIFICANT 
UPPER LEVEL MOISTURE. 

ON THE SURFACE...

A 1026 MB HIGH IS CENTERED NEAR 34N136W. A RIDGE AXIS EXTENDS SW 
TO 24N116W. ANTICYCLONIC SURFACE WINDS ARE GENERALLY AT 15-20 KT 
AROUND THE PERIPHERY OF THIS RIDGE.

GULF OF TEHUANTEPEC...THE NOCTURNAL NORTHERLY DRAINAGE FLOW WILL 
MAX AT 15 KT TONIGHT AND EACH NIGHT THROUGH FRI NIGHT...THEN 
WEAKEN TO A 10 KT MAX ON SAT NIGHT.

$$
FORMOSA