Tornado Watch 311

Issued

Jun 24, 2021, 6:33 PM CDT (23:33 UTC)

Expired

Jun 24, 2021, 9:03 PM CDT

In force

3 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

70 kt

The Des Moines radar (KDMX), 139 km from the middle of the area, began a volume at 23:34 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

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1082 Severe potential...watch likelyJun 24, 6:19 PM CDT
• Mesoscale Discussion 1084 Tornado watch 309...310Jun 24, 7:29 PM CDT
• Mesoscale Discussion 1086 Tornado watch 309...311Jun 24, 8:33 PM CDT

046 
WWUS20 KWNS 242331
SEL1  
SPC WW 242331
IAZ000-MOZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 311
NWS Storm Prediction Center Norman OK
635 PM CDT Thu Jun 24 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southern Iowa
  Northern Missouri

* Effective this Thursday evening from 635 PM until 1000 PM CDT.

* Primary threats include...
  A couple tornadoes possible
  Scattered damaging winds likely with isolated significant gusts
    to 80 mph possible
  Isolated very large hail events to 2 inches in diameter possible

SUMMARY...A couple supercells may be sustained across southern Iowa
and northern Missouri this evening, before growing upscale into a
broader cluster towards late evening.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 55 miles west southwest of Lamoni IA
to 20 miles north northeast of Kirksville 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 309...WW 310...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 27030.

...Grams

Tornado Watches in Missouri, 2021Tornado Watches in Iowa, 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.