Widespread wind damage reports were reported across much of Georgia and Alabama on March 18 2013. There were also reports of Hail varying in size from small to upward of 3 inches.
While this storm system as far as I’ve seen has not been classified as a Derecho, it does qualify as one. A Derecho is classified as a long lived line of storms causing wind damage for more than 240 miles along most of it’s length. Another requirement to meet Derecho qualification is wind speeds of or greater than 57 MPH at points along the path of the storm. I don’t have data to back this up, but from following and reporting on many of the storms spawned by this system, I’d say this qualification was also met.
This system caused widespread wind damage from North Alabama where it began to take on the characteristics of a Derecho and lasting into Southeast Georgia. The distance covered is almost double the 240 mile requirement.
Here’s a Radar loop of the event …
Here’s a couple maps showing wind damage and hail as well as a couple tornado reports.
August 2012 – Tropical Disturbances: To many to choose from during the month, so here is the whole month. August 4 thru 30 2012 Archive *Note: The tropical page linked in many of these posts has no data so don’t bother clicking through. It’s only used to post current data when storms are active.
October 2012 – Hurricane Sandy – Hurricance Sandy Archive *Note: The tropical page linked in many of these posts has no data so don’t bother clicking through. It’s only used to post current data when storms are active.
November 21 2012 – Last post of the year on Georgia Drought – No Improvement – Georgia Drought Update – I expect the Drought update for this week [ January 3 2013 ] and the beginning of the new year will show some improvement after recent rains.
The possibility of severe storms still exist today for areas in the southeast. Currently [ 5:20 AM EST 12/17/2012 ] seeing some moderate to strong thunderstorms in Southeast Mississippi / Southwest Alabama ahead of the cold front generally heading East-Northeast while the Cold front pushes east.
Radar at 5:20 AM EST
The only thing at this time I see limiting stronger storms developing, some possibly severe, is instability and moisture available ahead of the front. This lack of instability will be on the increase. By early afternoon / mid day Georgia should see storms some of which ‘will be severe’ begin to fire off. As always, ‘Not everyone will see severe weather. I don’t think there is enough time this morning for severe storms to break out in south-central Alabama, but may see some later in East Alabama / West Georgia. At the least should see isolated thunderstorms in these areas as morning pushes on. All of this will eventually make it’s way to South Carolina later today.
As mentioned the past few days the greatest threat will be ‘Damaging winds’ associated with the stronger storms. We’ll have to keep an eye on things this afternoon onward for the potential for an isolated tornado as well as hail.
Here’s the outlook for today issued by the SPC ‘valid at 12z – 7 AM EST’ this morning. [click image to embiggen]
I likely wont be posting further updates on this here. Be sure to follow me on twitter where I post information when severe weather is happening including radar images and most if not all Tornado and Severe Warnings with information as to location and where the storms are headed. Follow @Cataulagawx