Hurricane forecasters are tracking two tropical waves in the Atlantic that could be the next areas of concern in the wake of Hurricane Erin. Here’s what the spaghetti models are showing.

The National Hurricane Center is monitoring two disturbances in the Atlantic—the first poised to approach the northern Leeward Islands later this week and the second near the Cabo Verde Islands—while Hurricane Erin, now a Category 3, heads away from the Caribbean.

Storms that ramp up so quickly complicate forecasting and make it harder for government agencies to plan for emergencies. Hurricane Erick, a Pacific storm that made landfall June 19 in Oaxaca, Mexico, also strengthened rapidly, doubling in intensity in less than a day.

Hurricane Erin has intensified to a Category 4 storm affecting the Caribbean, impacting flights and cruise itineraries, with warnings issued for the Bahamas and Turks and Caicos, and it poses a significant coastal threat to the U.

While Erin is expected to take a northward turn in the Atlantic, a new system off the coast of Africa has the National Hurricane Center's attention.

Forecasters said Erin should begin to slowly weaken as it increased wind shear. However, it's predicted to remain a major hurricane until late next week.

Tropical Storm Erin on Wednesday continued to push west through the Atlantic with it forecast to become the season’s first hurricane, growing to major hurricane strength by the weekend,