000
AXNT20 KNHC 120024
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT WED JUL 11 2007

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...THE GULF OF MEXICO...THE CARIBBEAN SEA...NORTHERN 
SECTIONS OF SOUTH AMERICA...AND THE ATLANTIC OCEAN TO THE 
AFRICAN COAST FROM THE EQUATOR TO 32N. THE FOLLOWING INFORMATION 
IS BASED ON SATELLITE IMAGERY...METEOROLOGICAL ANALYSIS... 
WEATHER OBSERVATIONS...AND RADAR.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...TROPICAL WAVES...
TROPICAL WAVE IS ALONG 31W S OF 18N MOVING W 15 KT.  BROAD LOW 
LEVEL INVERTED-V SIGNATURE IS OBSERVED ON SATELLITE IMAGERY W OF 
THE CAPE VERDE ISLANDS.  SCATTERED MODERATE CONVECTION IS FROM 
8N-12N BETWEEN 31W-33W.   

TROPICAL WAVE IS ALONG 58W S OF 17N MOVING W 10-15 KT.  LOW 
LEVEL INVERTED-V SIGNATURE IS OBSERVED ON SATELLITE IMAGERY FROM 
10N-17N.  CLUSTERS OF SCATTERED MODERATE CONVECTION ARE W OF THE 
WAVE AXIS OVER THE WINDWARD ISLANDS FROM 8N-11N BETWEEN 60W-65W.

TROPICAL WAVE IS ALONG 71W S OF 16N MOVING W 10 KT.  WAVE SHOWS 
SOME CYCLONIC LOW LEVEL TURNING BUT IS VOID OF ANY SIGNIFICANT 
CONVECTION.   

TROPICAL WAVE IS ALONG 86W S OF 18N MOVING W 15 KT.  WAVE IS 
TRAVERSING CENTRAL AMERICA.  CLUSTERS OF WIDELY SCATTERED 
MODERATE CONVECTION ARE FROM 5N-14N BETWEEN 80W-85W.   

...THE ITCZ...
ITCZ AXIS IS CENTERED ALONG 12N14W 6N40W 8N60W.  SCATTERED 
MODERATE CONVECTION IS ALONG THE COAST OF W AFRICA FROM 10N-14N 
BETWEEN 13W-18W.  SCATTERED MODERATE CONVECTION IS FROM 8N-12N 
BETWEEN 31W-33W...AND FROM 6N-8N BETWEEN 36W-40W.    
 
...DISCUSSION...
GULF OF MEXICO...
1021 MB HIGH IS CENTERED OVER THE CENTRAL ATLANTIC NEAR 27N90W 
PRODUCING MAINLY FAIR WEATHER AND LIGHT ANTICYCLONIC SURFACE 
WINDS.  SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS 
HOWEVER OVER THE SRN PORTIONS OF THE BAY OF CAMPECHE FROM 
18N-20N BETWEEN 91W-94W.  ELSEWHERE...SCATTERED MODERATE 
CONVECTION IS OVER CENTRAL FLORIDA FROM 28N-29N BETWEEN 80W-82W. 
IN THE UPPER LEVELS...AN UPPER LEVEL LOW IS CENTERED OVER THE 
BAY OF CAMPECHE NEAR 21N96W.  AN UPPER LEVEL HIGH IS CENTERED 
OVER THE NE GULF OF MEXICO NEAR 28N84W.  EXPECT LITTLE CHANGE 
OVER THE NEXT 24 HOURS.  
    
CARIBBEAN SEA...
THREE TROPICAL WAVES ARE INFLUENCING THE WEATHER IN THE 
CARIBBEAN SEA.  SEE ABOVE.  A 1008 MB LOW IS ALSO CENTERED MOVER 
N COLOMBIA NEAR 8N76W.  SCATTERED MODERATE TO STRONG CONVECTION 
IS FROM 7N-11N BETWEEN 74W-77W.  TRADEWINDS ARE ALSO THE 
STRONGEST NEAR THE COAST OF N COLOMBIA AT 30 KT.  ELSEWHERE... 
SCATTERED SHOWERS EXTEND FROM THE VIRGIN ISLANDS TO HISPANIOLA 
...AS NOTED ON THE SAN JUAN DOPPLER RADAR.  IN THE UPPER 
LEVELS...A SMALL UPPER LEVEL LOW IS CENTERED OVER THE W 
CARIBBEAN NEAR 17N81W.  ANOTHER SMALL UPPER LEVEL LOW IS 
CENTERED N OF HISPANIOLA NEAR 20N69W.  A RIDGE IS OVER THE E 
CARIBBEAN SEA E OF 65W.  EXPECT SOME SHOWERS AND THUNDERSTORMS 
WITH THE TROPICAL WAVES DURING THE NEXT 24 HOURS.      

ATLANTIC OCEAN...
A DOMINATE 1029 MB HIGH IS CENTERED OVER THE CENTRAL ATLANTIC 
NEAR 33N40W PRODUCING FAIR WEATHER OVER MOST OF THE ATLANTIC.  A 
SURFACE RIDGE EXTENDS W TO CENTRAL FLORIDA NEAR 27N80W.  IN THE 
UPPER LEVELS... A RIDGE IS OVER THE W ATLANTIC N OF 20N W OF 
70W.  AN UPPER LEVEL LOW IS OVER THE CENTRAL ATLANTIC NEAR 
27N54W.  AN UPPER LEVEL HIGH IS OVER THE E ATLANTIC NEAR 
17N30W.  ANTICYCLONIC FLOW IS FROM 5N-30N E OF 40W.      

$$
FORMOSA