000
AXPZ20 KNHC 201007
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE NOV 20 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 
0900 UTC.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 92W N OF 9N MOVING W 10 KT. NO SIGNIFICANT 
CONVECTION.

TROPICAL WAVE ALONG 79W N OF 4N MOVING W 10-15 KT. SCATTERED 
MODERATE TO STRONG CONVECTION ALONG E COAST OF NICARAGUA.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 8N81W 8N115W 11N130W 11N140W. 
ISOLATED MODERATE CONVECTION WITHIN 90 NM OF AXIS W OF 113W.

...DISCUSSION...

VERTICALLY STACKED CUT OFF CYCLONIC CIRCULATION CENTERED NEAR 
24N110W PRODUCING DRY AIR AND NO CLOUDS IN THE MIDDLE AND UPPER 
LEVELS. A PLUME OF UPPER LEVEL MOISTURE EMANATING FROM ITCZ 
CONVECTION IS S OF THE CUT OFF LOW WITH A JET MAXIMUM EXTENDING 
FROM 15N115W TO 20N100W.

NORTH OF THE ITCZ WEST OF 120W BROAD RIDGE COVERS THE AREA. DEEP 
LEVEL BROKEN/OVERCAST CLOUDS BLANKET MOST OF THE AREA N OF 7N W 
OF 120W...BUT ITCZ CONVECTION IS SHALLOW AND NOT WIDESPREAD.
   
AT THE SURFACE WEAK RIDGE IS NORTH OF THE ITCZ WEST OF 105W. 
ELSEWHERE BROAD TROUGH IS ANALYZED.

QUIKSCAT LAST EVENING SHOWED GAP WINDS IN THE GULF OF TEHUANTEPEC
UP TO 30 KNOTS. WINDS EXPECTED TO DECREASE BELOW 20 KT IN 36 HRS.

$$
MUNDELL