000
AXPZ20 KNHC 281520
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON JAN 28 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 9N83W TO 6N93W. ITCZ 6N93W 5N110W 8N130W TO 
5N140W. NO SIGNIFICANT CONVECTION. 

...DISCUSSION...
UPPER LEVEL TROUGH WITH AXIS FROM 32N120W 26N130W TO 27N135W. AN 
UPPER LEVEL RIDGE IS BUILDING NW OF THE TROUGH. A 90-100 KT 
JETSTREAM IS SE OF THE TROUGH FROM 14N137 TO CENTRAL BAJA 
CALIFORNIA WHERE WINDS INCREASE TO 120 KT THEN INTO NW MEXICO 
AND THE SW UNITED STATES. BROKEN TO OVERCAST MIDDLE AND HIGH 
CLOUDS ARE WITHIN 400 NM SE OF THE JET FROM 125W-113W. AN UPPER 
LEVEL RIDGE IS SE OF THE TROUGH EXTENDING FROM CENTRAL MEXICO SW 
TO 8N113W. A SHARPE UPPER LEVEL TROUGH EXTENDS FROM THE BAY OF 
CAMPECHE ACROSS SOUTHERN MEXICO TO THE GALAPAGOS ISLANDS. STRONG 
SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS 
SUPPRESSING CONVECTION E OF 110W. 

SURFACE RIDGE IS N OF 20N W OF 115W. THE PRES GRADIENT ON THE 
SOUTHERN PERIPHERY OF THE RIDGE IS SUPPORTING ELY WINDS IN THE 
20-25 KT RANGE FROM 20N-25N W OF 130W. OTHERWISE LARGE NW SWELL 
TO 10 FT ARE W OF 115W.

ELY 20-25 KT WINDS CONTINUE THROUGH THE GULF OF PAPAGAYO AND ARE 
EXPECTED TO CONTINUE THROUGH WED.

$$
DGS