UPDATE #4 at 8pm: Dangerous Situation With Tornado Watch Until 1am

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Yellow area has an enhanced risk of tornadoes -- some may be strong. Brown = significant risk of tornadoes. Tornado watch till 1am for much of this area. 


-- out of date as of 8pm --
The amber is a tornado watch until 1am. It includes Chicago, Peoria and South Bend. In addition to tornadoes the NWS is forecasting widespread wind gusts of 90 mph. 



--- info below still valid as of 7pm ---

A derecho has formed in Iowa with tornadic supercells out ahead. Multiple tornado and high wind warnings are out as of 5:30pm. 

Tornado Threat
The yellow is an enhanced risk of tornadoes and it would not surprise me if some of them turn out to be strong. Northern Illinois is the area I've been concerned about since the midday update (see below, if you wish). The brown area has a significant risk of tornadoes. 

Damaging Wind Forecast
With a derecho in progress, it is important to understand the color codes:
  • Purple = high risk of wind gusts of 75 mph or stronger. 
  • Red = enhanced risk of wind gusts of 75 mph or stronger. 
  • Yellow = significant risk of wind gusts of 60 mph or stronger. 
Prepare now! There will be power failures and tree outages. Fill your car with fuel. Bring in outdoor furniture and trampolines that will blow around. When the storms arrive, stay away from windows. 

Please monitor the weather the rest of the day in these areas. 

Below is the radar at 5:35pm. 


-- original posting (outdated) --


Updated - The brown area has a significant risk of tornadoes this afternoon and evening. It includes the Quad Cities, Cedar Rapids and Rockford and has been extended into northern Indiana and southwest Michigan. I believe the risk of tornadoes between Rockford and Peoria over to Chicagoland may be a bit higher than forecast here. Please keep up on the weather this afternoon. 

Updated - There are extensive damaging wind risks later today. The yellow areas have significant risks of 60 mph winds (or stronger). The red area has an enhanced risk of 60 mph or stronger winds. The hatching indicates where 75 mph or stronger winds are forecast to occur. This has been extended, also, into Michigan and Indiana. A derecho is entirely possible. 
Please keep up on the weather in these areas!

Comments

  1. AnonymousJuly 15, 2024 at 7:50 PM

    Thank you for your important updates! Do you have any control over the kinds of ads run on your site? I just saw some for an organization I know you would never support or back.. PP.

    ReplyDelete
    Replies
    1. AnonymousJuly 15, 2024 at 7:54 PM

      Mike Smith here....
      See below. The ads are from the Monumetric network.

      Delete

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