ABNT20 KNHC 171734 
Tropical Weather Outlook 
NWS National Hurricane Center Miami FL 
200 PM EDT Mon Jul 17 2017 
For the North Atlantic...Caribbean Sea and the Gulf of Mexico: 
An area of low pressure located about 525 miles east-southeast of 
Barbados is moving westward at 15 to 20 mph. The associated 
shower and thunderstorm activity has changed little in organization 
since this morning and the system still appears to lack a 
well-defined center. Environmental conditions are conducive for 
some development before the system reaches the Lesser Antilles late 
Tuesday or early Wednesday. After that time, less favorable 
upper-level winds are expected to hinder additional development. 
Regardless of development, this system is expected to bring locally 
heavy rainfall and gusty winds to portions of the Lesser Antilles 
beginning Tuesday. An Air Force Reserve reconnaissance aircraft is 
currently en route to investigate the disturbance. 
* Formation chance through 48 hours...medium...50 percent. 
* Formation chance through 5 days...medium...50 percent. 
An area of disturbed weather is located about 875 miles west- 
southwest of the Cabo Verde Islands. Some gradual development of 
this system is possible over the next few days while it moves slowly 
toward the west-northwest or northwest over the open Atlantic Ocean. 
* Formation chance through 48 hours...low...20 percent. 
* Formation chance through 5 days...low...30 percent.