Tornado Threat Forecast

Tornado Threat Forecast: May 7-13, 2018

Mother Nature went back to sleep and has hit the snooze button on the second week of May. Opportunities for a couple of tornadoes here and there, but each day’s setup looks like it will be hard to come by many tornadoes. However, we are heading into mid-May, where more subtle setups at range can yield higher-than-expected tornado counts if the mesoscale ingredients line up just right.

1-3 Day


Monday

No tornadoes expected.

Tuesday – East-central Plains, southwestern Midwest

NUMBER OF TORNADOES EXPECTED: 1-4 – CONFIDENCE: Normal
Tornado Hot-spot: None

Pros: Low to moderate instability, good/excellent low-level directional shear, good low-to-mid level speed shear.
Cons: Weaker upper-level winds, some backing winds in the upper levels, potential low-level moisture concerns.

Wednesday – Illinois, Indiana, western Kentucky

NUMBER OF TORNADOES EXPECTED: 3-7 – CONFIDENCE: Normal
Tornado Hot-spot: None

Pros: Low to moderate instability, decent/good low-level directional shear, decent/good speed shear.
Cons: Questionable low-level moisture, mostly unidirectional mid-to-upper level winds.

4-7 Day


Thursday – Southern South Dakota, northern Nebraska

NUMBER OF TORNADOES EXPECTED: 1-4 – CONFIDENCE: Low
Tornado Hot-spot: None

Pros: Low to moderate instability, good/excellent directional shear, decent/good low-level speed shear.
Cons: Questionable low-level moisture, high LCLs, weak/decent mid-to-upper level speed shear.

Friday – Southern Nebraska, far northern Kansas

NUMBER OF TORNADOES EXPECTED: 0-3 – CONFIDENCE: Normal
Tornado Hot-spot: None

Pros: Moderate instability, good low-level directional shear, good speed shear
Cons: Unidirectional mid-to-upper level winds, potential low-level moisture issues in the western areas, capping issues in the eastern areas.

Saturday

No tornadoes expected.

Sunday – Southern Plains

NUMBER OF TORNADOES EXPECTED: 0-2 – CONFIDENCE: Normal
Tornado Hot-spot: None

Pros: Low to moderate instability, decent/good low-level directional shear.
Cons: Questionable storm coverage in the warm sector, weak/decent speed shear, unidirectional winds in the mid-to-upper levels, little to no upper-level dynamics.

The following two tabs change content below.
Operational Meteorologist at WeatherBug (Earth Networks). See full bio.

Latest posts by Mark Ellinwood (see all)

Mark Ellinwood

Operational Meteorologist at WeatherBug (Earth Networks). See full bio.

Share
Published by
Mark Ellinwood

Recent Posts

The Storm Doctor: Dr. Jason Persoff

Jason Persoff, MD, SFHM, is recognized globally for his expertise in storm chasing. He earned…

3 months ago

Top tornado videos of 2023

Tornado numbers were near or above average. A chase season peak in June provided numerous…

4 months ago

March 31, 2023 tornado outbreak videos

One of the more widespread tornado outbreaks in years, from Iowa and Illinois to Arkansas.

1 year ago

Spring 2023 seasonal tornado outlook

The active start of the year could be a sign, but a mid-March pattern change…

1 year ago

Top tornado videos of 2022

A near average year for tornadoes across the country, with a cool season bend. We've…

1 year ago

Andover, Kansas struck by intense damaging tornado

The twister quickly popped up near sunset and rapidly turned violent.

2 years ago