000
AXPZ20 KNHC 070400
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI DEC 7 2007

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS ALONG 9N84W 9N111W 8N140W. 
SCATTERED MODERATE CONVECTION FROM 9N TO 10N BETWEEN 107W AND 110W.

...DISCUSSION...
QUIKSCAT DATA 12 HOURS AGO SHOWED A DISTINCT LACK OF SIGNIFICANT 
WINDS ACROSS THE REGION. ISOLATED 15-20 KT WINDS WERE EVIDENT FROM 
10N TO 18N W OF 125W WITH 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 OUT. 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 CYCLONIC CIRCULATIONS NEAR 21N118W AND 13N134W. NARROW 
RIDGE EXTENDS FROM 15N124W TO 28N136W. SUBTROPICAL JET REMAINS N OF 
30N. 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