Tropical Storm Isaias is at 70 mph and is currently about 150 miles south of Charleston, SC. It will make landfall tonight near the SC/NC border, just north of Myrtle Beach. While it briefly coupled its low level center and mid level center just before midnight last night, it has since decoupled. Isaias' appearance on satellite has gotten quite poor, although more convection is coming up near the center. Reconnaissance this morning only found winds of 60 mph, but the NHC has opted to keep it at 70 mph. Its centers appear to be trying to couple once again and its eye is trying to close off, and if that happened it could briefly attain hurricane status. Regardless, heavy rain, high winds, and storm surge will be likely. Isaias will weaken once over land, but rainfall amounts could exceed 6" east of Washington, DC.
There is also a severe weather threat up the entire east side of the storm. A slight risk is in effect today for that threat, but it will exist through tomorrow night all the way up to Cape Cod. The impacts of Isaias will be equivalent to category 1 strength on my (new hurricane scale.) All in all, everyone on the east coast should remain aware of this tropical storm through Wednesday morning.
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