- Widespread severe thunderstorms are expected in the South.
- That includes the potential of a derecho, with widespread damaging winds.
- This is an unusual weather pattern for the Deep South in June.
A severe thunderstorm outbreak, with the possibility of a derecho, is expected to continue across the South through Wednesday night as an unusually strong jet stream for June is in place across the region.
This stormy pattern is already underway. Severe thunderstorms are impacting multiple areas in the South right now. Here's a look at the latest radar along with any active watches and/or warnings.
Widespread severe thunderstorms are expected in the Deep South on Wednesday. Parts of northeastern Texas, southern Arkansas, northern Louisiana, Mississippi, Alabama, Georgia, northern Florida and southern South Carolina will likely see multiple rounds of severe weather into Wednesday night or early Thursday morning.
Very large, damaging hail, destructive wind gusts and tornadoes, a few of which could be strong, could accompany some of the storms, especially in the areas shaded red below.
The highest potential for tornadoes will be from central Alabama into southwestern Georgia.
Hail up to 3 inches in diameter is possible, mainly from northeastern Texas into eastern Alabama.
Wind gusts up to 80 mph may occur in some storms in Mississippi, Alabama and southern Georgia.
A derecho may develop near the Lower Mississippi Valley and track toward the central Gulf Coast this evening. A derecho is a large cluster of thunderstorms that cause widespread destruction to trees, power lines and structures.
Flash flooding from heavy rainfall is also a concern, especially in southeastern Alabama and southwestern Georgia.
Be sure to have a way to receive warnings overnight.
Scattered severe thunderstorms will develop Thursday. Thursday's severe threat will be a significant step down in intensity from Wednesday.
One area that will see a severe threat on Thursday is in the Plains from north-central Texas into southern Nebraska. Another area will stretch along the Gulf Coast from far eastern Louisiana into northern Florida.
Damaging hail and wind gusts are the primary threats, but an isolated tornado is also possible.
Flash flooding may also develop, especially in southern Alabama and southern Georgia.
Storms have been impacting the South since this weekend. Severe weather over the weekend and into Monday kicked off this stormy stretch in the South.
Hailstones as big as softballs pelted the northern Dallas-Fort Worth metro area Sunday evening. That was followed by a supercell that dropped hail up to the size of tennis balls and softballs in the southern metroplex on Monday evening.
Up to 5.5-inch diameter hail was reported in the Texas Panhandle Tuesday afternoon and evening.
An unusual pattern for June is in place. The South typically sees severe weather from pop-up afternoon thunderstorms in the summer months like June. Wind damage is often the biggest threat from those summertime storms.
This week is different since the jet stream is the driving force behind the severe weather. That's unusual because the jet stream often retreats to a more northerly position across the U.S. this time of year.
Disturbances in the jet stream are tapping into plenty of warm, humid air from the Gulf of Mexico to produce severe weather this week.
NOAA's Storm Prediction Center noted in their Wednesday morning outlook wind strength in the middle and upper levels of the atmosphere were "essentially record or near record" for this time of year. SPC meteorologists Elizabeth Leitman and Evan Bentley also noted one parameter of instability known as the "mid-level lapse rate" was also extreme for this time of year over the Deep South.
"I've been forecasting severe weather in the Southeast for almost 30 years, and I'm pretty confident I've never seen a setup like today's in June," wrote Alan Gerard, a meteorologist with NOAA's National Severe Storms Laboratory and former meteorologist in charge of the NWS-Jackson, Mississippi, office, in a tweet Wednesday.
The end result is that severe weather in the South this week is more organized than we usually see in June, resembling a setup from early spring.
According to Iowa State University meteorologist Daryl Herzmann, Wednesday was the first time the SPC issued its second highest severe threat outlook in any part of Alabama in June in over nine years.
Chris Dolce has been a senior meteorologist with weather.com for over 10 years after beginning his career with The Weather Channel in the early 2000s.
The Weather Company’s primary journalistic mission is to report on breaking weather news, the environment and the importance of science to our lives. This story does not necessarily represent the position of our parent company, IBM.
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