000
AXPZ20 KNHC 301520
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON JAN 30 2012

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 6N78W 04N95W. ITCZ FROM 4N95W 6N110W 4N140W. NO 
SIGNIFICANT CONVECTION.

...DISCUSSION...
AN UPPER LEVEL TROUGH EXTENDS FROM 32N127W TO 25N140W. AN UPPER 
LEVEL RIDGE IS MOVING INTO THE FAR NW PORTION OF THE DISCUSSION 
AREA W OF THE TROUGH. A BROAD UPPER LEVEL RIDGE IS E OF THE 
TROUGH N OF 20N BETWEEN 110W-125W. MODERATE TO STRONG SUBSIDENCE 
WITH DRY/STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS FROM 
20N-30N BETWEEN 105W-125W.

IN THE DEEP TROPICS A NEGATIVELY TILTED UPPER LEVEL TROUGH 
EXTENDS FROM 15NN100W TO THE EQUATOR AT 85W. ABUNDANT TROPICAL 
MOISTURE IS WITHIN THE TROUGH N OF 9N. W OF THE TROUGH A BROAD 
RIDGE COVERS THE AREA S OF 20N.

SURFACE HIGH PRES RIDGE COVERS THE AREA N OF 15N W OF 110W. NE 
TRADES AT 20 KT ARE OBSERVED ALONG THE SOUTHERN PERIPHERY OF THE 
THE RIDGE FROM 6N-20N W OF 135W...WITH SEAS TO 9 FT.

STRONG HIGH PRES BUILDING OVER THE SE U.S. HAS TIGHTENED THE 
PRES GRADIENT ACROSS SOUTHERN MEXICO RESULTING IN GALE FORCE 
WINDS THROUGH THE GULF OF TEHUANTEPEC. THESE CONDITION ARE 
EXPECTED TO DECREASE TO BELOW GALE FORCE LATER TODAY.

ELY WINDS 20-30 KT CONTINUE TO BLOW THROUGH THE GULF OF PAPAGAYO 
AND ARE EXPECTED DECREASE SOME OVER THE NEXT 48 HOURS. WHILE NLY 
WINDS TO 20 KT THROUGH THE GULF OF PANAMA THROUGH WED.

$$
DGS