Severe Thunderstorm Watch 454

Issued

Aug 20, 2021, 7:40 PM CDT (00:40 UTC)

Expired

Aug 21, 2021, 12:41 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Pleasant Hill radar (KEAX), 107 km from the middle of the area, began a volume at 00:42 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

5%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

60%

• Mesoscale Discussion 1568 Severe potential...watch possibleAug 20, 3:57 PM CDT
• Mesoscale Discussion 1570 Severe thunderstorm watch 453Aug 20, 7:06 PM CDT
• Mesoscale Discussion 1572 Severe thunderstorm watch 454Aug 20, 9:37 PM CDT
• Mesoscale Discussion 1573 Severe thunderstorm watch 454Aug 20, 11:39 PM CDT

925 
WWUS20 KWNS 210038
SEL4  
SPC WW 210038
KSZ000-MOZ000-210700-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 454
NWS Storm Prediction Center Norman OK
740 PM CDT Fri Aug 20 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northeast Kansas
  Northwest Missouri

* Effective this Friday night and Saturday morning from 740 PM
  until 200 AM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Storms have congealed into a linear structure across
northeast Kansas, and these storms are expected to persist while
spreading into northwest Missouri through the early overnight hours.
 The strongest embedded storms/bowing segments will be capable of
producing damaging outflow gusts of 60-70 mph.

The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 60 miles north northeast
of Saint Joseph MO to 35 miles southwest of Olathe KS. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).

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 451...WW 452...WW 453...

AVIATION...A few severe thunderstorms with hail surface and aloft to
0.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
28025.

...Thompson

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.