Tornado Watch 541

Issued

Jul 15, 2024, 6:53 PM CDT (23:53 UTC)

Expired

Jul 16, 2024, 1:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

80 kt

The Chicago radar (KLOT), 72 km from the middle of the area, began a volume at 23:56 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

60%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

80%

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

95%

• Mesoscale Discussion 1638 Severe thunderstorm watch 539Jul 15, 5:26 PM CDT
• Mesoscale Discussion 1639 Severe potential...watch likelyJul 15, 6:06 PM CDT
• Mesoscale Discussion 1641 Severe thunderstorm watch 539Jul 15, 6:55 PM CDT
• Mesoscale Discussion 1642 Tornado watch 541Jul 15, 8:26 PM CDT
• Mesoscale Discussion 1643 Severe potential...watch likelyJul 15, 9:37 PM CDT
• Mesoscale Discussion 1644 Tornado watch 541Jul 15, 10:13 PM CDT
• Mesoscale Discussion 1645 Severe potential...watch possibleJul 15, 11:11 PM CDT

408 
WWUS20 KWNS 152351
SEL1  
SPC WW 152351
IAZ000-ILZ000-INZ000-MIZ000-WIZ000-LMZ000-160600-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 541
NWS Storm Prediction Center Norman OK
650 PM CDT Mon Jul 15 2024

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Extreme east central Iowa
  Northern Illinois
  Northwest Indiana
  Southwest Lower Michigan
  Extreme southern Wisconsin
  Lake Michigan

* Effective this Monday night and Tuesday morning from 650 PM
  until 100 AM CDT.

* Primary threats include...
  A few tornadoes likely
  Widespread damaging winds and scattered significant gusts to 90
    mph likely
  Scattered large hail events to 1.5 inches in diameter possible

SUMMARY...Thunderstorms are expected to evolve into one or more bow
echoes from Iowa into northern Illinois this evening, with the
potential to produce swaths of significant severe gusts up to 75-90
mph and several tornadoes with embedded circulations.  The storms
will spread into northwest Indiana and southwest Lower Michigan
later tonight.

The tornado watch area is approximately along and 100 statute miles
east and west of a line from 65 miles northwest of Benton Harbor MI
to 55 miles south southeast of Marseilles IL. 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 539...WW 540...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 80 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 29040.

...Thompson

Tornado Watches in Illinois, 2024Tornado Watches in Indiana, 2024Tornado Watches in Michigan, 2024Every tornado watch in 2024

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.