000
AXPZ20 KNHC 292134
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT DEC 29 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 6N77W 9N115W 7N130W 
5N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS LOCATED 
WITHIN WITHIN 100 NM N OF AXIS FROM 128W TO 131W AND FROM 136W 
TO 140W.

...DISCUSSION...

W OF 100W...
A MIDDLE/UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED JUST N 
OF THE NORTHERN BOUNDARY OF THE DISCUSSION AREA NEAR 33N137W... 
NEARLY STATIONARY. ANTICYCLONIC WINDS COVER THE AREA N OF 27N W 
OF 128W. FURTHER EAST A STRONG MIDDLE/UPPER LEVEL TROUGH HAS ITS 
AXIS ALONG 109W N OF 25N AND IS DIGGING SOUTHWARD. CYCLONIC FLOW 
IS LOCATED UP TO EIGHT OR NINE DEGREES EITHER SIDE OF THE TROUGH 
AXIS. AN ELONGATED MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS 
POSITIONED NEAR 20N135W...MOVING WEST 10 TO 15 KNOTS. A TROUGH 
AXIS EXTENDS S FROM THE CIRCULATION CENTER TO 15N138W. A JET 
EXTENDS THROUGH 15N140W TO 20N130W AND ACROSS THE SOUTHERN TIP 
OF BAJA CALIFORNIA. THE STRONGEST WINDS ALONG THE JET ARE 
BETWEEN 120W AND 130W WITH SPEEDS TO 80 KNOTS AS MEASURED BY 
SATELLITE CLOUD DRIFT WINDS. A LARGE AREA OF SOUTHWESTERLY WINDS 
ALOFT ARE LOCATED S OF THE JET TO NEAR 8N BETWEEN 100W AND 135W. 
AT THE SURFACE STRONG NE TRADE WINDS OF 25 TO 30 KNOTS ARE 
LOCATED FROM 8N TO 26N W OF 125W. CONDITIONS WILL GRADUALLY 
DECREASE OVER THE NEXT 24 TO 48 HOURS. 

E OF 100W...
A WEAK MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS LOCATED IN THE 
VICINITY OF 9N92W...STATIONARY. MODERATE SOUTHERLY WINDS ALOFT 
ARE LOCATED E OF ABOUT 88W INTO CENTRAL AMERICA AND COLOMBIA.

$$
CAB