Severe Thunderstorm Watch 296

Issued

Jun 20, 2021, 8:10 PM CDT (01:10 UTC)

Expired

Jun 21, 2021, 1:00 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Quad Cities radar (KDVN), 76 km from the middle of the area, began a volume at 01:12 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

10%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1039 Severe thunderstorm watch 294Jun 20, 6:56 PM CDT
• Mesoscale Discussion 1041 Severe thunderstorm watch 296Jun 20, 9:54 PM CDT

704 
WWUS20 KWNS 210109
SEL6  
SPC WW 210109
ILZ000-MOZ000-210600-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 296
NWS Storm Prediction Center Norman OK
810 PM CDT Sun Jun 20 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  West-Central/Northern Illinois
  Northeast Missouri

* Effective this Sunday night and Monday morning from 810 PM
  until 100 AM CDT.

* Primary threats include...
  Scattered large hail likely with isolated very large hail events
    to 2 inches in diameter possible
  Scattered damaging wind gusts to 70 mph likely
  A tornado or two possible

SUMMARY...Multiple corridors of severe thunderstorms are expected to
spread east-southeastward across the region this evening as the
atmosphere recovers/destabilizes in the wake of storms earlier
today. Damaging winds and isolated large hail are the primary
hazards as storms spread across west-central/northern Illinois and
northeast Missouri.

The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 20 miles north of
Rockford IL to 55 miles south southwest of Quincy IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).

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 293...WW 294...WW 295...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
29030.

...Guyer

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.