For now, a first round of thunderstorms is rumbling from eastern South Dakota to the Ohio Valley, with rainfall rates up to 2.5 inches per hour and some sporadic strong winds gusts.
Severe thunderstorm watches have been posted in parts of Illinois and Iowa for the potential of brief strong wind gusts with the strongest thunderstorms. Winds have gusted up to 66 mph early Wednesday in Muscatine, Iowa.
Current Radar with Watches and Warnings
This is only the first round of severe thunderstorms.
Low pressure pushing east along a warm front separating oppressively hot air from cooler air while being accompanied by a mid-level atmospheric disturbance is the setup for this potentially volatile severe threat later Wednesday.
Derechos, long-lived and widespread thunderstorm wind damage events, sometimes develop in this type of atmospheric setup, though it remains to be seen whether one of those will develop Wednesday or not.
(MORE: What is a Derecho? | The Midwest's Summer Derecho Alley)
The setup for a potential severe weather outbreak Wednesday and Wednesday night in the Midwest.Severe Weather Forecast
Wednesday-Wednesday Night- Morning: One or more clusters of t-storms from the Upper Mississippi Valley into the Ohio Valley will be capable of strong wind gusts, large hail and locally flooding rainfall.
- Late afternoon: Discrete supercell thunderstorms (particularly in western part of severe risk area) pose a threat of large hail and a few tornadoes.
- Night: Activity should congeal into a large squall line of t-storms in parts of Illinois, Indiana, Ohio and southern Michigan by evening, pushing east-southeast into the central Appalachians late with a threat of widespread damaging straight-line winds, possibly leading to numerous power outages, downed trees, and perhaps some structural damage.
- Cities: Chicago | Indianapolis | Cincinnati | Charleston, West Virginia
- Flood threat: While the main threats are from fast-moving thunderstorm clusters, any brief locally heavy rain may trigger areas of local flash flooding, particularly in the Appalachians.
Wednesday's Thunderstorm Risk (NOAA/SPC)
- Morning: We can't rule out the previous t-storm cluster/squall line surviving into the Mid-Atlantic states or Applachians Thursday morning, with straight-line high wind gusts the primary threat.
- Afternoon/evening: Otherwise, scattered severe t-storms may fire up in the afternoon and early evening along or south of the rain-cooled outflow boundary from the morning's thunderstorms from the mid-Atlatnic states and central Appalachians to the central High Plains of the Rockies.
- Cities: Cincinnati | Denver | Washington D.C.
Thursday's Thunderstorm Forecast
Storm Reports Recap
On Tuesday, severe thunderstorms flared up in a broad zone from the mid-Atlantic states to the northern High Plains.For a complete recap of Tuesday and Tuesday night's severe weather impacts, click here to read the article.
Monday
Strong wind gusts took down trees and power lines in parts of Indiana, Illinois and Missouri on Monday afternoon. The threat shifted eastward by Monday evening, taking down additional trees and power lines in portions of Upstate New York. Additionally, some small hail was reported in places like Rochester, New York, late Monday evening.Father's Day Weekend
Hail as large as tennis balls, teacups and even grapefruits struck Minnesota Sunday evening as severe thunderstorms rolled through the state.(LATEST NEWS: Injuries Reported in Minnesota Storms)
The same cold front brought severe weather to northeast Montana on Saturday. Hailstones up to 4 inches in diameter were reported in Wolf Point. A few locations measured wind gusts in excess of 70 mph.
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If you crave pictures of severe weather, you've found your home here. Upload your photos or video (taking care to only take photos and videos from a safe location) to us and share your experience!(PHOTO/VIDEO GALLERIES: Severe | Storms)
PHOTOS: Plains, Midwest Mid-June 2016 Severe Weather and Flooding
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