Tornado Watch 531

Issued

Oct 24, 2021, 2:06 PM CDT (19:06 UTC)

Expired

Oct 24, 2021, 11:00 PM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

65 kt

The St Louis radar (KLSX), 137 km from the middle of the area, began a volume at 19:08 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

70%

One or more EF2 to EF5 tornadoes

50%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1888 Severe potential...tornado watch likelyOct 24, 12:40 PM CDT
• Mesoscale Discussion 1890 Tornado watch 531Oct 24, 3:28 PM CDT
• Mesoscale Discussion 1891 Tornado watch 531Oct 24, 3:50 PM CDT
• Mesoscale Discussion 1892 Severe potential...watch likelyOct 24, 5:11 PM CDT
• Mesoscale Discussion 1893 Tornado watch 531Oct 24, 5:25 PM CDT
• Mesoscale Discussion 1895 Tornado watch 533Oct 24, 8:17 PM CDT
• Mesoscale Discussion 1897 Tornado watch 533Oct 24, 10:33 PM CDT

701 
WWUS20 KWNS 241904
SEL1  
SPC WW 241904
ILZ000-MOZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 531
NWS Storm Prediction Center Norman OK
205 PM CDT Sun Oct 24 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Extreme west central Illinois
  Missouri

* Effective this Sunday afternoon and evening from 205 PM until
  1000 PM CDT.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Scattered damaging winds and isolated significant gusts to 75
    mph likely
  Scattered large hail likely with isolated very large hail events
    to 2 inches in diameter possible

SUMMARY...Scattered severe storm development is expected this
afternoon along and ahead of a cold front moving from Kansas toward
western Missouri.  The storm environment will initially favor
supercells capable of producing a couple of strong tornadoes, large
hail, and damaging winds.  Later this evening, the threat for wind
damage will increase as storms evolve into a more linear mode toward
eastern Missouri, while the threat for tornadoes will persist with
circulations embedded in the line of storms.

The tornado watch area is approximately along and 95 statute miles
east and west of a line from 10 miles east northeast of Kirksville
MO to 55 miles south southeast of Springfield MO. 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 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24045.

...Thompson

Tornado Watches in Missouri, 2021Tornado Watches in Illinois, 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.