Tornado Watch 321

Issued

Jun 26, 2021, 12:05 PM CDT (17:05 UTC)

Expired

Jun 26, 2021, 9:00 PM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Chicago radar (KLOT), 49 km from the middle of the area, began a volume at 17:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1109 Severe potential...watch possibleJun 26, 11:45 AM CDT
• Mesoscale Discussion 1110 Tornado watch 321Jun 26, 12:48 PM CDT
• Mesoscale Discussion 1112 Tornado watch 321Jun 26, 2:47 PM CDT
• Mesoscale Discussion 1114 Tornado watch 321...322Jun 26, 6:08 PM CDT
• Mesoscale Discussion 1117 Tornado watch 322Jun 26, 8:23 PM CDT

813 
WWUS20 KWNS 261703
SEL1  
SPC WW 261703
ILZ000-INZ000-MIZ000-LMZ000-270000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 321
NWS Storm Prediction Center Norman OK
1205 PM CDT Sat Jun 26 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Central and Northeast Illinois
  Northwest Indiana
  Southwest Lower Michigan
  Lake Michigan

* Effective this Saturday afternoon and evening from 1205 PM
  until 700 PM CDT.

* Primary threats include...
  A couple tornadoes possible
  Scattered damaging wind gusts to 70 mph possible
  Scattered large hail events to 1 inch in diameter possible

SUMMARY...Isolated rotating storms have begun to develop over
central and northeast Illinois.  This trend may continue through the
afternoon, with the potential for damaging wind gusts or isolated
tornadoes in the strongest cells.

The tornado watch area is approximately along and 50 statute miles
north and south of a line from 35 miles west northwest of Decatur IL
to 35 miles north of Lansing MI. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1 inch. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24030.

...Hart

Tornado Watches in Illinois, 2021Tornado Watches in Michigan, 2021Tornado Watches in Indiana, 2021Every tornado watch in 2021

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.