Marion County and several other surrounding counties in Tennessee and North Alabama are now under a Tornado Watch until 7:00pm CDT / 8:00pm EDT tonight.
Tennessee counties covered under the watch include:
- Bledsoe County, TN
- Bradley County, TN
- Hamilton County, TN
- Marion County, TN
- McMinn County, TN
- Meigs County, TN
- Monroe County, TN
- Polk County, TN
- Rhea County, TN
- Sequatchie County, TN
And in Alabama…
- De Kalb County, AL
- Jackson County, AL
A low pressure system and associated cold front will approach the area from the Mississippi River Valley this afternoon causing atmospheric instability and a continual flow of moisture through tonight.¬† As a result, showers and storms are expected to develop —¬† some storms possibly becoming severe throughout the area.
The timing of the storms expected to affect our area is as follows…
- Monday afternoon and early evening:¬† Scattered storms, mostly non-severe
- Monday late through early morning Tuesday:¬† Solid line of strong to severe storms start on the Cumberland Plateau around 9:00pm CDT, moving through the Marion County area by 10:00-11:00pm CDT, Chattanooga metro area by Midnight EDT, and finally ending over western North Carolina by daybreak.
- Tuesday morning and afternoon:¬† Cloudy with showers.
- Tuesday evening into early Wednesday:¬† Storms redevelop, severe storms are possible.
Primary concerns during the overnight hours tonight include damaging straight-line winds, isolated tornadoes, localized Flash Flooding, and large hail.
Our area remains at a Slight Risk — up to a 15% chance of a tornado within 25 miles of any point — from Monday evening until early Tuesday.¬† We will also be under slight risk Tuesday evening into early Wednesday.ght Risk for entire viewing area
Currently, All Tennessee counties are under a Flood Watch¬† from 7:00pm CDT tonight through 7:00am CDT Wednesday.
Northern Alabama (including Jackson and DeKalb Counties) are under a Flash Flood Watch until 7:00am CDT Tuesday.
According to the National Weather Service a storm is classified as severe if it produces any one or all of the following:
- Hail of 1″+ in diameter
- Winds of 58 mph+
- A tornado
If a WATCH is issued this means conditions are favorable for severe storm or tornado development in the very near future. If a WARNING is issued this means a severe storm or tornado has been indicated on radar or spotted on the ground and is heading your way. Seek shelter immediately if a WARNING is issued for your area.
Don’t panic, just be prepared! If you have a NOAA weather radio be sure the alert mode is in the ON position. If you don’t have a NOAA weather radio they can usually be found locally at Radio Shack, Wal-Mart, CVS, and other stores selling small electronics and home goods. Buy one with battery back-up and put fresh batteries in it in case you lose power during a storm.