National Weather Service United States Department of Commerce

An Unsettled Weekend For The West

A large and strong Pacific storm system will impact a good portion of the West this weekend. Heavy rain, widespread mountain snow, gusty winds and a variety of marine related hazards are likely. The heavy rain threat may result in some flash flooding today and Saturday across north-central portions of California and southwestern Oregon, especially near recent and vulnerable burn scar areas. Read More >

Overview

A broken line of supercellular thunderstorms (rotating thunderstorms) broke out on the afternoon of Saturday, December 1st, 2018. Three of of these thunderstorms produced multiple tornadoes across portions of western and central Illinois. Below are the tornadoes that affected the NWS St. Louis county warning area. For more detailed, interactive maps, please visit: https://apps.dat.noaa.gov/StormDamage/DamageViewer/