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Tornadoes

Tornado Watch Issued for Northern Illinois and Southern Wisconsin

Strategic Insights

— 1 min read

A tornado watch has been issued by the NWS Storm Prediction Center for portions of Northern Illinois and Southern Wisconsin. The watch is effective from 450 PM CDT until 1100 PM CDT on Friday, July 11. The primary threats include a few tornadoes, scattered damaging winds, and isolated large hail events.

Key Takeaways:

  • The NWS Storm Prediction Center has issued a Tornado Watch 508 for Northern Illinois and Southern Wisconsin.
  • The watch is effective from 450 PM CDT until 1100 PM CDT on Friday, July 11.
  • The primary threats include a few tornadoes, scattered damaging winds with isolated significant gusts to 75 mph, and isolated large hail events to 1.5 inches in diameter.
  • The tornado watch area is approximately along and 55 statute miles east and west of a line from 10 miles east northeast of Madison WI to 55 miles south southeast of Rockford IL.
  • Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings.
  • A few cumulonimbi with maximum tops to 550, extreme turbulence, and surface wind gusts to 65 knots are associated with this watch.
  • The Aviation Watch (SAW) product is an approximation to the watch area, with the actual watch depicted by the shaded areas.
  • The watch status report message has not been issued yet.

Statistics:

  • The tornado watch is effective for 4.5 hours.
  • The primary threats include a few tornadoes with a probability of 50%, scattered damaging winds with a probability of 70%, and isolated large hail events with a probability of 30%.
  • The watch area is approximately 55 statute miles east and west of a line from 10 miles east northeast of Madison WI to 55 miles south southeast of Rockford IL.
  • The wind gusts are expected to reach up to 65-75 mph.
  • The hail events are expected to reach up to 1.5 inches in diameter.

Sources:

  • US National Oceanic and Atmospheric Administration (Note: The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.)
  • NWS Storm Prediction Center (WW 508 issued at 450 PM CDT on Friday, July 11)
  • SAW8 WW 508 issued on Friday, July 11 at 50NM E/W /35SE DLL - 18WSW JOT.

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