ST. LOUIS — A new round of thunderstorms is on the way for the St. Louis region, though this setup is not as intense as the storms that hit last Friday. Still, you should remain alert, especially late Monday afternoon into the night, when the potential for severe weather increases.

Sunday night into early Monday:
A line of storms forming in Kansas and Oklahoma will move through Missouri and into Illinois between midnight and 6 a.m. Monday. While storms will weaken as they approach eastern Missouri, they may still bring wind gusts over 40 mph, brief heavy rainfall, and small hail. Most activity will clear the area in time for the Monday morning commute.

Monday (through 4 p.m.):
The morning and early afternoon will be mostly quiet, aside from a few stray showers and occasional breezy conditions.

Monday late afternoon into Monday night:
Storms will redevelop across Missouri after 4 p.m., especially along and near a warm front expected to sit near I-70. These storms may become strong to severe, particularly in areas highlighted under a Level 3 (out of 5) severe weather risk. All severe weather threats are possible, including damaging winds, hail, and a low tornado risk. As storms move east, they will likely lose some strength but could still bring heavy rainfall. Localized flash flooding is possible in low-lying or flood-prone areas.

Tuesday:
Storm activity on Tuesday will depend on how much the atmosphere is disrupted by Monday night’s storms. If the storms “scrub” the atmosphere clean, most of the region could see a break. However, if the air recharges with enough instability, another round of storms could develop in the afternoon over far eastern Missouri and southern Illinois.

Tornado Survey Update:
The National Weather Service has completed its survey of the tornado that hit the region Friday. It was rated an EF3 with winds up to 152 mph. The tornado traveled 22.6 miles and was nearly 1 mile wide at its peak. The most intense damage occurred in north St. Louis City, including Fountain Park, Ville, Greater Ville, and O’Fallon. Damage in Illinois was mainly to trees and rated EF0 to EF1.