000
AXPZ20 KNHC 060343
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED FEB 06 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 06N77W TO 05N80W TO 09N85W TO 06N94W 
THEN ITCZ AXIS TO 07N102W TO 05N120W TO 04N132W TO 05N140W.  NO 
SIGNIFICANT CONVECTION.

...DISCUSSION...
SHARP UPPER LEVEL TROUGH FROM 32N122W TO DEVELOPING CYCLONE AT 
15N126W TO 00N134W ADVECT MOISTURE ALOFT INTO BAJA CALIFORNIA 
AND NORTHERN HALF OF MEXICO RIDING ON WEAK 60 KT JET CORE WITHIN 
6 DEGREES E OF AXIS.  REMAINDER OF BASIN REMAINS UNDER VERY DRY 
AND STABLE AIR MASS DUE TO MODERATE TO STRONG SUBSIDENCE ON BOTH 
SIDES OF UPPER LEVEL TROUGH. 

...AT THE LOWER LEVELS...    
HEALTHY HIGH PRES CENTER 1029 MB NW OF AREA MOVE E TO 34N150W 
WED WITH RIDGE EXTENDING TO 17N107W.  RIDGE KEEP MODERATE NE 
BREEZE N OF 10N W OF 110W BUT LARGE PORTION OF BASIN REMAIN 
UNDER EFFECTS OF 8-9 FT NW SWELL.  RIDGE PUSHES AGAINST 
CALIFORNIA COAST AS IT MOVES E AND TIGHTENS PRES GRADIENT 
INCREASING WINDS TO A FRESH N TO NE BREEZE N OF 30N E OF 125W 
LATE WED SPREADING 10-12 FT NW SWELLS ON NW PORTION OF BASIN BY 
EARLY FRI AND THEREAFTER. 

$$
WALLY BARNES