000
AXPZ20 KNHC 290927
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL                          
1005 UTC WED JAN 29 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 
0900 UTC.                              
 
...SPECIAL FEATURE...

GULF OF TEHUANTEPEC GALE WARNING...STRONG HIGH PRESSURE BUILDING 
SOUTHWARD INTO SOUTHERN MEXICO BEHIND A COLD FRONT MOVING ACROSS 
THE GULF OF MEXICO WILL CREATE A TIGHT PRESSURE GRADIENT ACROSS 
SOUTHERN MEXICO AND INDUCE GALE FORCE WINDS INTO THE GULF OF 
TEHUANTEPEC...STARTING LATER THIS AFTERNOON AND CONTINUING ABOUT 
THU EVENING THEN DECREASE TO BELOW GALE FORCE THU NIGHT. HIGHEST 
WINDS ARE EXPECTED TO REACH 40 KT EARLY THU MORNING. ASSOCIATED 
SEAS WILL BUILD TO 14-15 FT WED NIGHT.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              

MONSOON TROUGH FROM 6N77W TO 5N92W. ITCZ FROM 5N92W TO 6N125W TO 
5N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...

UPPER LEVEL RIDGE OVER THE NW PORTION OF THE DISCUSSION AREA 
EXTENDS FROM 32N122W TO 14N137W. MODERATE TO STRONG SUBSIDENCE 
DRY AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF 10N W 
OF 120W. UPPER LEVEL TROUGH WITH AXIS FROM NORTHERN MEXICO NEAR 
THE BIG BEND OF TEXAS TO 13N125W. A SW 90-100 KT JETSTREAM IS 
ACROSS CENTRAL MEXICO. AN UPPER LEVEL RIDGE EXTENDS FROM AN 
ANTICYCLONIC CIRCULATION FROM THE EQUATOR AT 82W ACROSS CENTRAL 
AMERICA INTO THE CARIBBEAN. 

SURFACE RIDGE COVERS THE AREA N OF 15N W OF 110W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS ARE WITHIN THE RIDGE. LARGE NW 
SWELL CONTINUES ACROSS THE AREA GENERALLY W OF 120W WITH SEAS 8 
TO 10 FT. THE AREA OF SWELL DECREASE IN SIZE THROUGH THE NEXT 48 
HOURS.

$$
DGS