Severe Thunderstorm Watch 317

Issued

Jun 25, 2021, 5:06 PM CDT (22:06 UTC)

Expired

Jun 25, 2021, 11:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The St Louis radar (KLSX), 88 km from the middle of the area, began a volume at 22:10 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

20%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1095 Severe thunderstorm watch 314Jun 25, 3:13 PM CDT
• Mesoscale Discussion 1096 Severe potential...severe thunderstorm watch likelyJun 25, 4:46 PM CDT
• Mesoscale Discussion 1101 Severe thunderstorm watch 319Jun 25, 7:05 PM CDT
• Mesoscale Discussion 1103 Severe thunderstorm watch 317Jun 25, 8:34 PM CDT
• Mesoscale Discussion 1105 Severe thunderstorm watch 318...319Jun 25, 10:31 PM CDT

518 
WWUS20 KWNS 252204
SEL7  
SPC WW 252204
ILZ000-MOZ000-260400-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 317
NWS Storm Prediction Center Norman OK
510 PM CDT Fri Jun 25 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central Illinois
  Central and northeast Missouri

* Effective this Friday afternoon and evening from 510 PM until
  1100 PM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Isolated large hail events to 1.5 inches in diameter possible
  A tornado or two possible

SUMMARY...Multiple clusters should develop and spread east-northeast
from central Missouri through central Illinois this evening.

The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 45 miles west southwest
of Columbia MO to 40 miles northeast of Champaign IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 314...WW 315...WW 316...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
25030.

...Grams

Severe Thunderstorm Watches in Illinois, 2021Severe Thunderstorm Watches in Missouri, 2021Every severe thunderstorm 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.