NWS National Hurricane Centre Miami FL
800 AM EDT Tue Jun 15, 2021
For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
The National Hurricane Centre is issuing advisories on Tropical Storm Bill, located a few hundred miles east-southeast of Nantucket, Massachusetts.
1. Disorganized showers and thunderstorms continue over the Bay of Campeche and southern Mexico in association with a broad low-pressure area. This system is expected to move little during the next day or two, and any development should be slow to occur, during that time period. However, the disturbance should begin to move northward by Thursday, and a tropical depression is likely to form late in the week when the low moves across the central or northwest Gulf of Mexico. Regardless of development, heavy rainfall will continue over portions of Central America and southern Mexico during the next several days. Heavy rains could also begin to impact portions of the northern Gulf Coast on Friday. Please consult products from your local meteorological service for more information.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...high...70 percent.
2. Showers and thunderstorms have decreased and become less organized during the past several hours in association with a tropical wave located a few hundred miles south of the Cabo Verde Islands. Development, if any, should be slow to occur during the next couple of days while the wave moves westward. Thereafter, a combination of dry air aloft and strong upper-level winds should limit the chances of formation when the wave reaches the central tropical Atlantic.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 5 days...low...10 percent.
