James Spann: Isolated showers for Alabama Tuesday, then a dry spell
RADAR CHECK: Strong thunderstorms persisted over far east Alabama this afternoon ahead of a deep upper trough for summer. They produced hail in parts of Cherokee, Cleburne and Calhoun counties earlier today. Most of those have moved over into Georgia, and for a large percentage of Alabama the sky is mostly sunny with temperatures close to 90 degrees this afternoon.
REST OF THE WEEK: We will keep the risk of a few isolated showers in place for Tuesday afternoon with the upper trough nearby, but most places will be dry with a partly sunny sky. The high will be from 87 to 90 degrees for most communities. For the rest of the week, the weather looks dry with lower precipitable water values. We expect mostly sunny days and fair nights Wednesday through Friday with highs around 90 and lows in the 60s. Humidity will be a bit lower than usual for August in Alabama.
THE ALABAMA WEEKEND: For now we are going to leave showers out of the forecast as the unusually dry air mass holds in place. Expect a good supply of sunshine Saturday and Sunday; heat levels will rise a bit, with highs in the low to mid 90s.
NEXT WEEK: The risk of rain remains very low Monday and Tuesday, but global models show higher moisture levels over the latter half of the week, and we will bring back the chance of scattered, mostly afternoon and evening showers and thunderstorms Wednesday through Friday.
ISAIAS ROLLING NORTHEAST: Tropical Storm Isaias will move into the coast of the Carolinas this evening; winds are 70 mph as I write this. The system will continue to move northeast, right up the I-95 corridor, over the next 48 hours.
There is the danger of life-threatening storm surge inundation along portions of the immediate coastline and adjacent waterways of northeastern South Carolina and the North Carolina coast in the Storm Surge Warning area. Residents in these areas should follow advice given by local emergency officials.
Isaias is expected to bring widespread sustained tropical-storm-force winds and wind gusts to hurricane force to the mid-Atlantic coast Tuesday, which could cause tree damage and power outages. Tropical storm conditions are expected to reach southern New England Tuesday evening and are possible along the northern New England coast Tuesday night and early Wednesday.
Heavy rainfall will result in flash and urban flooding, some of which may be significant in the eastern Carolinas and the mid-Atlantic, through Tuesday night near the path of Isaias up the East Coast of the United States. Widespread minor-to-moderate river flooding is possible across portions of the Carolinas and the Mid-Atlantic.
INVEST 94L: A disturbance south of Bermuda has a medium chance of becoming a tropical depression or storm over the next 48 hours; models suggest steering currents will collapse, and that system just might hang around the same place for three to five days. For now it doesn’t seem to be a threat to the U.S.
The rest of the Atlantic basin is quiet.
ON THIS DATE IN 1970: Hurricane Celia made landfall near Port Aransas, Texas, as a major hurricane, Category 3 on the Saffir-Simpson scale with sustained winds of 130 mph. It was the costliest tropical cyclone in Texas history until Hurricane Alicia in 1983. Throughout the state, 8,950 homes were destroyed and about 55,650 others damaged. About 252 small businesses, 331 boats and 310 farm buildings were either damaged or destroyed. The impact was the worst in Nueces County, which observed gusts as high as 180 mph. In Corpus Christi, about one-third of houses suffered severe damage or were destroyed. Additionally, about 90% of the buildings downtown were damaged to some degree. Celia weakened as it continued further inland and dissipated over New Mexico on Aug. 6.
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