000
AXPZ20 KNHC 062205
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU DEC 6 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN
FROM THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS ALONG 9N84W 9N111W 8N130W 
7N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
QUIKSCAT DATA SHOWS A DISTINCT LACK OF SIGNIFICANT WINDS ACROSS THE 
REGION. ISOLATED 15-20 KT WINDS ARE EVIDENT FROM 10N TO 18N W OF 
125W AND SOME 20 KT WINDS ARE OBSERVED NEAR THE GALAPAGOS ISLANDS... 
BUT OTHERWISE WINDS ARE 15 KT OR LESS. LARGE SWELLS GENERATED IN THE 
N PACIFIC EARLIER THIS WEEK CONTINUE TO SWEEP SE BUT ARE SUBSIDING 
AS THEY SPREAD FARTHER AWAY FROM SOURCE REGION. SEAS GENERALLY 8 TO 
12 FT IN NW PORTION OF THE DISCUSSION AREA.

WATER VAPOR IMAGERY SHOWS LARGE SCALE UPPER LEVEL TROUGHING OVER THE 
REGION...WITH SEVERAL CYCLONIC CIRCULATIONS SHOWING UP NEAR 22N100W 
21N118W 23N141W AND 13N135W. A NARROW RIDGE EXTENDS FROM 11N125W TO 
26N135W. THE SUBTROPICAL JET IS DISPLACED N OF ITS USUAL POSITION. 
THE UPPER LOW NEAR 21N118W LIFTS OUT LATE FRI AS A TROUGH DIGS INTO 
THE INTERMOUNTAIN WEST. AN INTERVENING RIDGE AMPLIFIES AND BUILDS N. 

A SFC RIDGE WILL BUILD SOMEWHAT W OF 120W ALLOWING A SLIGHT INCREASE 
IN TRADE WINDS. AS THE UPPER TROUGH SLIDES TO THE NE...AN ASSOCIATED 
WEAK COLD FRONT WILL PUSH S OF 30N OFF THE NRN BAJA COAST...FOLLOWED 
BY FRESH NLY FLOW. THE FRONT BECOMES DIFFUSE AND WINDS DIMINISH BY 
SAT...BUT NLY SWELL WILL PERSIST N OF 22N. ELY WINDS WILL INCREASE A 
LITTLE THROUGH THE GULF OF PAPAGAYO...ALTHOUGH GENERALLY BELOW 20 KT 
OVER THE NEXT COUPLE OF DAYS.

$$
MUNDELL