Former Tropical Storm Idalia strengthened to a hurricane over the southeastern Gulf of Mexico on Tuesday morning. At 8:00 a.m. EDT on Tuesday the center of Hurricane Idalia was located at latitude 23.8°N and longitude 84.8°W which put it about 320 miles (515 km) south-southwest of Tampa, Florida. Idalia was moving toward the north at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 95 m.p.h. (145 km/h). The minimum surface pressure was 977 mb.

A Hurricane Warning was in effect for the portion of the coast from Indian Pass to the middle of Longboat Key, Florida. The Hurricane Warning included Tampa Bay. A Hurricane Warning was also in effect for the Cuban Province of Pinar del Rio. A Hurricane Watch was in effect for the portion of the coast from Englewood to the middle of Longboat Key, Florida. A Tropical Storm Warning was in effect for the portion of the coast from Chokoloskee to the middle of Longboat Key, Florida. A Tropical Storm Warning was also in effect for the portion of the coast from Indian Pass to Mexico Beach, Florida. A Tropical Storm Warning was in effect for the Dry Tortugas. A Tropical Storm Warning was in effect for the portion of the coast from Sebastian Inlet, Florida to Altamaha Sound, Georgia. A Tropical Storm Warning was also in effect for the Cuban Province. of Isle of Youth. A Tropical Storm Watch was in effect for the Lower Florida Keys west of Seven Mile Bridge. A Tropical Storm Watch was also in effect for the portion of the coast from Altamaha Sound, Georgia to South Santee River, South Carolina.

Former Tropical Storm Idalia strengthened to a hurricane after the center of Idalia moved north of the western end of Cuba. The inner end of a rainband wrapped around the center of Idalia’s circulation. A weather radar at La Bajada, Cuba showed a small eye developed at the center of Hurricane Idalia. The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Idalia’s circulation. Storms near the core generated upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Idalia grew larger when Idalia intensified. Winds to hurricane force extended out 20 miles (30 km) from the center of Idalia’s circulation. Winds to tropical storm force extended out 160 miles (260 km) from the center of circulation.

Hurricane Idalia will move into an environment that will be favorable for intensification during the next 24 hours. Idalia will be over water where the Sea Surface Temperatures are near 30°C. It will move into a region between an upper level ridge over the Yucatan Peninsula and an upper level trough over the central U.S. The upper level winds are weaker between the ridge and the trough and there will be little vertical wind shear during the next 12 to 18 hours. The upper level winds will be stronger when Idalia moves closer to the upper level trough on Wednesday morning. Hurricane Idalia will intensify during the next 24 hours. Idalia could intensify rapidly now that an inner core with an eye and an eyewall have developed. Hurricane Idalia could strengthen to a major hurricane.

Tropical Storm Idalia will move around the western end of high pressure system over the western Atlantic Ocean. The high pressure system and the upper level trough over the central U.S. will steer Idalia toward the north-northeast during the next 24 hours. On its anticipated track, Hurricane Idalia is likely to make landfall on the coast of the northeast Gulf of Mexico on Wednesday morning. Idalia could make landfall as a major hurricane.

Hurricane Idalia is forecast to be a major hurricane when it reaches the coast of Florida. Idalia could be similar in size and intensity to Hurricane Dennis when Dennis hit Northwest Florida in 2005. Hurricane Idalia is likely to make landfall in an area where high storm surges can occur. Idalia could cause a storm surge of up to 12 feet (3.5 meters) near where the center makes landfall. A Storm Surge Warning has been issued for the portion of the coast from Englewood to Indian Pass, Florida. The Storm Surge Warning includes Tampa Bay. Hurricane Idalia will bring strong winds and heavy rain to parts of central and northern Florida. Widespread outages of electricity are likely. Heavy rain could cause flash floods in some locations.

Elsewhere, Hurricane Franklin was a Category 4 hurricane on the Saffir-Simpson Scale over the Atlantic Ocean west-southwest of Bermuda. At 8:00 a.m. EDT on Tuesday the center of Hurricane Franklin was located at latitude 30.4°N and longitude 70.7°W which put it about 370 miles (600 km) west-southwest of Bermuda. Franklin was moving toward the north-northeast at 9 m.p.h. (15 km/h). The maximum sustained wind speed was 140 m.p.h. (220 km/h) and there were wind gusts to 165 m.p.h. (270 km/h). The minimum surface pressure was 941 mb. A Tropical Storm Watch was in effect for Bermuda.