Severe Thunderstorm Watch 508

Issued

Sep 20, 2021, 3:25 PM CDT (20:25 UTC)

Expired

Sep 20, 2021, 10:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Pleasant Hill radar (KEAX), 100 km from the middle of the area, began a volume at 20:27 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

10%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1768 Severe potential...watch likelySep 20, 12:38 PM CDT
• Mesoscale Discussion 1769 Severe potential...watch possibleSep 20, 2:15 PM CDT
• Mesoscale Discussion 1772 Severe thunderstorm watch 508Sep 20, 6:25 PM CDT

129 
WWUS20 KWNS 202022
SEL8  
SPC WW 202022
KSZ000-MOZ000-210300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 508
NWS Storm Prediction Center Norman OK
325 PM CDT Mon Sep 20 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Eastern Kansas
  Western and North-Central Missouri

* Effective this Monday afternoon and evening from 325 PM until
  1000 PM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Thunderstorms are expected to develop this afternoon along
a cold front moving into the watch area.  Hot and humid conditions
will help storms to intensify, with the strongest cells capable of
damaging wind gusts and hail.

The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 55 miles north of
Chillicothe MO to 65 miles south southwest of Knob Noster MO. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU8).

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 507...

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 500. Mean storm motion vector
25030.

...Hart

Severe Thunderstorm Watches in Missouri, 2021Severe Thunderstorm Watches in Kansas, 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.