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Center of Tropical Storm Debby Near Savannah

The center of Tropical Storm Debby was near Savannah, Georgia on Tuesday morning.  At 11:00 a.m. EDT on Tuesday the center of Tropical Storm Debby was located at latitude 31.9°N and longitude 81.0°W which put the center about 15 miles (25 km) south of Savannah, Georgia.  Debby was moving toward the east-northeast at 6 m.p.h. (10 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 999 mb.

A Tropical Storm Warning was in effect for the portion of the coast from Altamaha Sound Georgia to Surf City, North Carolina.  The Tropical Storm Warning included Charleston, South Carolina.

A Tropical Storm Watch was in effect for the portion of the coast from Surf City to Beaufort Inlet, North Carolina.

Tropical Storm Debby continued to drop heavy rain over parts of South Carolina and eastern Georgia.  The airport at Charleston, South Carolina reported 8.11 inches (206 mm) of rain during the past 24 hours.  Valdosta, Georgia received 2.75 inches (70 mm) of rain.  Sarasota, Florida reported 11.06 inches (281 mm) of rain from Debby.  Gainesville, Florida received 6.80 inches (173 mm) of rain.  Jacksonville, Florida reported 4.70 inches (119 mm) of rain.  It is likely that higher rainfall totals occurred in some places where bands moved persistently over the same locations.

Southerly winds blowing around the eastern side of Tropical Storm Debby were pushing water toward the coast of South Carolina.  There were numerous reports of water in streets in Charleston, South Carolina.

Tropical Storm Debby weakened during the day it spent moving slowly across northern Florida and southeastern Georgia.  Drier air wrapped around the western and southern sides of Debby’s circulation.  Bands in the southwestern and southeastern quadrants of Tropical Storm Debby consisted primarily of showers and lower clouds.  Showers and thunderstorms were occurring in bands in the outer parts of the northeastern and northwestern quadrants of Tropical Storm Debby.  There were also showers and lower clouds near the center of Debby.

The distribution of wind speeds in Tropical Storm Debby was also asymmetrical.  Winds to tropical storm force extended out 205 miles (330 km) in the eastern side of Debby.  Those winds were occurring in bands in the outer parts of Debby’s circulation.  The winds in the parts of Debby’s circulation that were over land were blowing at less than tropical storm force.

Tropical Storm Debby will move into an environment favorable for intensification.  Debby will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge over the southeastern U.S.  The upper level winds are weak near the center of the ridge and there will be little vertical wind shear.  The drier air in the southern part of Debby’s circulation will inhibit intensification.  Tropical Storm Debby is likely to intensify slowly during the next 24 hours.

Tropical Storm Debby will be in an area where the steering winds are weak during the next 24 hours.  Debby is likely to move slowly toward the east-northeast during the rest of Tuesday.  A high pressure system located east of Tropical Storm Debby is forecast to strengthen on Wednesday.  That high pressure system will steer Debby slowly toward the north on Wednesday.  On its anticipated track, the center of Tropical Storm Debby could approach the coast of South Carolina on Wednesday night.

Tropical Storm Debby will continue to drop heavy rain on parts of South Carolina, North Carolina and eastern Georgia.  Since Debby will move slowly, persistent heavy rain is likely to cause floods.

Flood Watches are in effect for parts of South Carolina, North Carolina and eastern Georgia.

Southerly winds blowing around the eastern side of Tropical Storm Debby will continue to push water toward the coast of South Carolina and North Carolina.  Debby could cause a storm surge of up to 6 feet (1.8 meters).

A Storm Surge Warning is in effect for the portion of the coast from Altamaha Sound, Georgia, to South Santee River, South Carolina.

A Storm Surge Watch is in effect for the portion of the coast from South Santee River, South Carolina to Cape Fear, North Carolina.

Hurricane Idalia Brings Wind and Rain to Southeast U.S.

Former Hurricane Idalia brought wind and rain to southeast U.S. on Wednesday. Idalia weakened to a tropical storm on Wednesday afternoon as it moved across southeastern Georgia. At 5:00 p.m. EDT on Wednesday the center of Tropical Storm Idalia was located at latitude 32.2°N and longitude 81.7°W which put it about 40 miles (65 km) west of Savannah, Georgia. Idalia was moving toward the northeast at 21 m.p.h. (33 km/h). The maximum sustained wind speed was 70 m.p.h. (110 km/h) and there were wind gusts to 85 m.p.h. (135 km/h). The minimum surface pressure was 961 mb.

A Tropical Storm Warning was in effect for the portion of the coast from the Flagler/Volusia County Line, Florida to the North Carolina/Virginia border. The Tropical Storm Warning included Charleston, South Carolina. The Tropical Storm Warning also included Pamlico Sound and Albemarle Sound.

Former Hurricane Idalia made landfall on the west coast of Florida near Keaton Beach on Wednesday morning. A NOAA C-MAN station at Keaton Beach (KTNF1) measured a sustained wind speed of 61 m.p.h. (98 km/h) and a wind gust of 77 m.p.h. (124 km/h). Idalia moved northeast across northern Florida and southeastern Georgia during Wednesday. The center of Idalia passed just to the southeast of Perry, Florida. A weather station in Perry (KFPY) measured a sustained wind speed of 62 m.p.h. (100 km/h) and a wind gust of 85 m.p.h. (137 km/h). Idalia weakened steadily as it moved over land. The center of Idalia’s circulation passed southeast of Valdosta, Georgia. A weather station in Valdosta (KVLD) measured a sustained wind speed of 39 m.p.h. (63 km/h) and a wind gust of 67 m.p.h. (108 km/h).

An upper level trough over the eastern U.S. will steer Tropical Storm Idalia toward the northeast during the next 12 hours. The upper level trough will pass north of Idalia on Thursday. The trough will steer Tropical Storm Idalia toward the east-northeast on Thursday. On its anticipated track, the center of Tropical Storm Idalia will move near the coast of South Carolina and North Carolina.

Tropical Storm Idalia will weaken gradually during the next 24 hours. The strongest winds in Idalia will occur over the Atlantic Ocean and along the coast of South Carolina and North Carolina. The winds will be weaker in parts of South Carolina and North Carolina that are farther inland. The southerly winds in the eastern part of Idalia will blow water toward the coast. Those winds will cause a storm surge along the coast of up to 7 feet (2 meters). A Storm Surge Warning was in effect for the portion of the coast from St. Catherine’s Sound, Georgia to South Santee River, South Carolina.

The southerly winds blowing in the eastern side of Tropical Storm Idalia will converge with northerly winds blowing around a high pressure system over the Great Lakes. The low level convergence of air will enhance rising motion and prolonged rainfall could occur over inland parts of South Carolina and North Carolina. Flood Watches are in effect for parts of eastern Georgia, South Carolina and North Carolina.

Elsewhere over the Atlantic Ocean, bands in the eastern side of Hurricane Franklin were producing gusty winds in Bermuda. At 5:00 p.m. EDT on Wednesday the center of Hurricane Franklin was located at latitude 34.2°N and longitude 65.9°W which put it about 145 miles (235 km) north-northwest of Bermuda. Franklin was moving toward the northeast at 13 m.p.h. (21 km/h). The maximum sustained wind speed was 105 m.p.h. (165 km/h) and there were wind gusts to 125 m.p.h. (200 km/h). The minimum surface pressure was 961 mb. A Tropical Storm Warning was in effect for Bermuda.