000
AXPZ20 KNHC 271603
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE NOV 27 2007

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1500 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE...9N79W 7N87W 8N96W 7N93W 9N110W 
8N120W 8N133W 8N140W. SCATTERED MODERATE TO STRONG SHOWERS/
THUNDERSTORMS FROM 6N TO 8N BETWEEN 78W AND 82W. SCATTERED 
MODERATE TO ISOLATED STRONG SHOWERS/THUNDERSTORMS FROM 7N TO 8N 
BETWEEN 93W AND 102W. ISOLATED MODERATE SHOWERS TO LOCALLY 
STRONG THUNDERSTORMS FROM 7N TO 9N BETWEEN 122W AND 140W.
SCATTERED MODERATE TO ISOLATED STRONG SHOWERS/THUNDERSTORMS ARE
JUST NORTH OF THE ITCZ FROM 12N TO 13N BETWEEN 106W AND 109W.

...DISCUSSION...
MIDDLE TO UPPER LEVEL CYCLONIC CIRCULATION CENTER NEAR 27N122W.
CYCLONIC FLOW COVERS THE AREA FROM 15N TO 35N BETWEEN 115W AND 
130W. MIDDLE TO UPPER LEVEL CLOUDS FROM 20N TO 35N BETWEEN 115W
AND 127W ARE CIRCULATING AROUND THIS CENTER. EVEN LOW TO MIDDLE 
LEVEL CLOUDS ARE MOVING CYCLONICALLY AROUND THIS CENTER ON THE
WESTERN SIDE OF THE SYSTEM...FROM 20N NORTHWARD BETWEEN 127W
AND 135W. A SMALLER-SCALE TROUGH ALSO IS ALONG 20N139W 28N140W 
SURROUNDED BY MIDDLE TO UPPER LEVEL DRY AIR.

ONE UPPER LEVEL RIDGE IS ALONG 8N132W 14N135W 20N137W.
A SECOND UPPER LEVEL RIDGE IS ALONG 8N123W 15N117W 20N115W.

SURFACE TROUGH ALONG 20N116W 16N120W 10N122W. SCATTERED MODERATE
TO STRONG SHOWERS/THUNDERSTORMS FROM 13N TO 14N BETWEEN 119W AND 
122W. SCATTERED MODERATE SHOWERS TO ISOLATED STRONG THUNDERSTORMS
FROM 18N TO 19N BETWEEN 117W AND 118W.

BROAD ANTICYCLONIC SURFACE WIND FLOW IS NORTHWEST
OF 30N119W 23N120W 18N129W 15N140W.

GALE-FORCE WINDS IN THE GULF OF TEHUANTEPEC ARE STARTING TO 
DEVELOP AND WILL CONTINUE FOR THE NEXT 24 HOURS...WIND SPEEDS 
WILL BE LESS THAN GALE-FORCE BY 48 HOURS. SURFACE HIGH PRESSURE 
HAS BEEN BUILDING FROM TEXAS SOUTHWARD DURING THE LAST FEW DAYS.

WIND SPEEDS IN THE GULF OF PAPAGAYO ARE FORECAST TO INCREASE
TO 20 TO 25 KT AT THE PEAK WITHIN 48 HOURS. HIGH PRESSURE
WILL BE BUILDING ACROSS THE CARIBBEAN SEA FORCING STRONG WINDS 
AGAINST MOUNTAIN GAPS IN CENTRAL AMERICA.
  
$$
MT