Here's a look at the early Sunday satellite view of our developing troublemaker:
This system will rapidly transform into a powerful storm system over the next 48 hours. It will dump over 8 inches of snow across eastern Nebraska for example which is currently under a blizzard watch. We will be on the "spring" side of the storm system and see showers and storms, some of which will be severe.
The greatest chance for storms which could produce severe weather sets up during the evening and overnight hours from west to east. A few things will be happening in the atmosphere during that time frame. Instability will drop off a little, but still be enough for severe storms to develop. The best dynamics will be departing northeast though enough wind shear in the atmosphere will still be around to help sustain severe storm development. Damaging straight line winds will be the greatest threat. Second, tornadoes will be possible too. The hail threat is low at this time. This is a typical winter set up for Alabama where we see high wind shear (winds increasing in speed and changing direction with height) and low instability (CAPE values of about 500 j/kg or less). We have see tornadoes form in high wind shear and CAPE values under 500 j/kg before.
Unlike a winter storm which impacts a large area, we are not expecting widespread severe storms. This is not an outbreak sort of set up at this time. We will see some organized severe storm development, especially across far west Alabama but then just some warnings here and there throughout the night as the squall line moves eastward. It's good to be prepared for possible severe storms that can be damaging. Have multiple ways of receiving weather information. I recommend the WBRC First Alert Weather App which sends alerts, allows you to watch our live stream coverage and is a great way to share pictures and videos you take with us.
The greatest chance for severe storms sets up on Tuesday PM across the orange shaded zone:
Future radar shows the squall line moving in overnight Tuesday:
Here's a closer look at the potential storm threats:
I'll post updates during the day on facebook (Jill Gilardi WBRC) and twitter (@jillgilardi) after I look at new data!
Jill Gilardi WBRC First Alert Certified Meteorologist