000
AXPZ20 KNHC 282147
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU DEC 28 2006

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2115 UTC.

...ITCZ...
AXIS 5N77W 7N89W 6N110W 7N140W. SCATTERED MODERATE CONVECTION 
WITHIN 90 NM S OF AXIS BETWEEN 124W AND 127W.

...DISCUSSION...
DEEP UPPER CUTOFF LOW PRES SYSTEM IS MOVING THROUGH THE SW 
UNITED STATES WITH TRAILING UPPER TROUGH OVER ALONG 106W. 
FURTHER W...SHARP UPPER RIDGE EXTENDS FROM HIGH PRES NEAR 
23N137W THROUGH BC/WASHINGTON STATE AREA. THE RIDGE IS 
AMPLIFYING AND SHIFTING E AHEAD OF A DEEP LAYER DIGGING THROUGH 
THE CENTRAL PACIFIC NW OF THE AREA. AT THE SURFACE...A 
DISSIPATING COLD FRONT ASSOCIATED WITH THE UPPER TROUGH OVER THE 
SW STATES IS PUSH S FROM NEAR CABO SAN LUCAS TO NEAR 20N120W. 
NEAR GALE FORCE NLY WINDS AS REPORTED THIS AFTERNOON BY SHIPS 
OFF THE NRN BAJA COAST AS HIGH PRES BUILDS IN BEHIND THE 
FRONT...ACCOMPANIED BY LARGE SWELL. QUIKSCAT SHOWS STRONG NWLY 
FLOW OVER NRN GULF OF CALIFORNIA AS WELL. 

ELSEWHERE...FRESH TO STRONG TRADES CONTINUE GENERALLY N OF 5N 
AND S OF BOUNDARY LAYER HIGH PRES ALONG 130W. QUIKSCAT AND SHIP 
OBSERVATIONS SHOW NEAR GALE SELY WINDS ON THE E SIDE OF THIS 
RIDGE AHEAD OF STRONG FRONTAL BOUNDARY TO THE NW...GENERALLY N 
OF 26N AND W OF 15W. FURTHER E...MORNING SHIP OBSERVATIONS AND 
QUIKSCAT DATA SHOW FRESH ELY WINDS PERSISTING IN GULF OF 
PAPAGAYO AREA.

LOOKING AHEAD A COUPLE OF DAYS...WINDS AROUND BAJA WILL 
GRADUALLY SUBSIDE AS RIDGING SHIFTS E...BUT LARGE NWLY SWELL 
WILL PERSIST. TRADES WILL DIMINISH SLIGHTLY IN INTENSITY AND 
COVERAGE...AND FRESH ELY WINDS WILL PERSIST INTO PACIFIC WATERS 
FROM THE PAPAGAYO AREA. REMNANT NELY AND NWLY LARGE SWELL WILL 
CONTINUE MAINLY W OF 100W. 

$$
CHRISTENSEN