A strong, non-tropical area of low pressure is churning over the northeastern Atlantic, several hundred miles west-northwest of the coast of Portugal. The system could acquire some subtropical or tropical characteristics as early as today or early Sunday as it tracks east-southeastward at 10 to 15 mph toward Portugal and northwestern Spain.
Any window for development, however, appears brief. Forecasters say the opportunity for tropical or subtropical development should close by Sunday night, when the system is expected to encounter unfavorable environmental conditions.
- Formation chance through 48 hours: Low — 20%
- Formation chance through 7 days: Low — 20%
Disorganized system drifts near Bermuda
A weak area of low pressure over the central subtropical Atlantic, located a few hundred miles east-southeast of Bermuda, is producing disorganized showers and thunderstorms. Any development is expected to be slow while the system drifts westward through Sunday before accelerating northward early next week.
- Formation chance through 48 hours: Low — 10%
- Formation chance through 7 days: Low — 20%
Tropical wave to emerge off Africa Monday
A tropical wave is expected to move off the west coast of Africa on Monday. An area of low pressure may form in association with the wave shortly after it moves offshore, with further development possible as the system tracks westward at 15 to 20 mph across the eastern and central tropical Atlantic through the end of next week.
- Formation chance through 48 hours: Low — near 0%
- Formation chance through 7 days: Low — 30%