Tornado Watch 359

Issued

Jul 9, 2021, 8:18 PM CDT (01:18 UTC)

Expired

Jul 10, 2021, 2:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

65 kt

The St Louis radar (KLSX), 133 km from the middle of the area, began a volume at 01:18 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

70%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1219 Severe potential...watch needed soonJul 9, 7:54 PM CDT
• Mesoscale Discussion 1224 Tornado watch 359Jul 9, 10:26 PM CDT
• Mesoscale Discussion 1228 Tornado watch 359Jul 10, 1:01 AM CDT
• Mesoscale Discussion 1230 Severe thunderstorm watch 363Jul 10, 1:21 AM CDT

691 
WWUS20 KWNS 100116
SEL9  
SPC WW 100116
ILZ000-MOZ000-100700-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 359
NWS Storm Prediction Center Norman OK
820 PM CDT Fri Jul 9 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  West central Illinois
  North central and northeast Missouri

* Effective this Friday night and Saturday morning from 820 PM
  until 200 AM CDT.

* Primary threats include...
  A couple tornadoes possible
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter likely
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible

SUMMARY...Thunderstorms will increase in coverage and intensity this
evening as the storms spread southeastward.  The storm environment
is favorable for supercells capable of producing a couple of
tornadoes, as well as isolated very large hail (near tennis ball
size) and significant severe gusts (near 75 mph).  The storms could
later grow into a cluster, with a continuing severe threat into the
early overnight hours.

The tornado watch area is approximately along and 90 statute miles
east and west of a line from 30 miles east northeast of Kirksville
MO to 60 miles south of Quincy IL. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU9).

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 356...WW 357...WW 358...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 32025.

...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.