000
AXPZ20 KNHC 250925
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN NOV 25 2007

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0845 UTC.

...TROPICAL WAVES...
.NONE.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE ALONG 9N79W 9N90W 8N95W 10N120W 
9N140W. ISOLATED MODERATE CONVECTION NEAR 6N82W 13N100W 9N103W 
10N105W 8N107W AND 14N105W. OTHER ISOLATED MODERATE CONVECTION 
NEAR 11N112W 11N115W 11N117W 11N122W AND 9N122W. ISOLATED 
MODERATE TO STRONG WITHIN 60 NM OF 19N133W.

...DISCUSSION...

CHANGES TAKING PLACE IN THE MID LEVELS TONIGHT AS THE FLOW 
BECOMES MORE ZONAL. STRONG POOL OF COLD AIR OVER NW MEXICO 
MOVING E. AN OLD RIDGE BACK ALONG 130W A FEW DAYS AGO HAS MOVED 
TO 120W TONIGHT. MID LEVEL TROUGHING W OF THE RIDGE NOW EXTENDS 
FROM 34N130W SW TO 15N145W. A SUBTROPIC JET HAS DEVELOPED AHEAD 
OF THE TROUGH AND IS SPREADING MID AND HIGH CLOUDS E AND NE OVER 
THE WRN PORTION OF THE AREA TONIGHT. ON THE SURFACE TONIGHT A 
WEAK PACIFIC RIDGE WAS CENTERED NEAR 34N140W AND EXTENDS OVER 
THE AREA TO 17N110W. NE TRADES MOSTLY 10 TO 15 KT EXCEPT FROM 
13N TO 18N W OF 135W WHERE THE PRES GRADIENT TIGHTENS BETWEEN 
THE PACIFIC HIGH AND WEAK LOW PRES NEAR 11N140W..RESULTING IN NE 
WINDS 20 TO 25 KT. WINDS ALONG THE BAJA COAST ARE NWLY 10 TO 15 
KT ACCORDING TO SSMI IMAGERY. GAP WINDS MOSTLY LIGHT EXCEPT FOR 
PAPAGAYO WHERE NE TO E WINDS TO 20 KT ARE NOTED. CROSS 
EQUATORIAL SLY WINDS 15 TO 20 KT ARE NOTED S OF 6N BETWEEN 85W 
AND 122W ACCORDING TO SSMI. 

LATER DAY 1 MID LEVEL FEATURES WILL CONTINUE TO MOVE SLOWLY EWD. 
THE STRONG POOL OF COLD AIR OVER NW MEXICO MOVES E TO 104W. THE 
MID LEVEL TROUGH OVER THE NW PORTION OF THE AREA MOVES TO 
32N123W TO 20N140W. A NEW MID LEVEL RIDGE APPEARS W OF THE 
TROUGH CENTERED NEAR 25N150W AND EXTENDS NE TO 40N130W. ON THE 
SURFACE LATER DAY 1 LITTLE CHANGE TO THE PACIFIC RIDGE AND NE 
TRADES. WINDS ALONG THE BAJA COAST REMAIN LIGHT BUT SHIFT TO 
NELY. GAP WINDS MOSTLY 10 TO 15 KT EXCEPT FOR PAPAGAYO WHERE ELY 
WINDS REMAIN 15 TO 20 KT. CROSS EQUATORIAL SLY WINDS MOSTLY 10 
TO 15 KT.

FOR DAY 2 THE MID LEVEL TROUGH BEGINS TO CLOSE OFF NEAR 30N122W 
WHILE STILL MOVING SLOWLY EWD. THE MID LEVEL RIDGE W OF THE ARE 
MOVES TO 31N143W. ON THE SURFACE DAY 2 THE PACIFIC RIDGE 
STRENGTHENS SOME WITH APPROACH OF THE MID LEVEL RIDGE AND NE 
TRADES INCREASE TO 20 KT BETWEEN 14N AND 24N W OF 130W. WINDS 
ALONG THE BAJA COAST REMAIN NELY 10 KT. GAP WINDS REMAIN LIGHT 
WITH PAPAGAYO DECREASING TO 10 TO 15 KT. CROSS EQUATORIAL SLY 
WINDS MOSTLY 10 TO 15 KT S OF 5N.

$$
RRG