Severe Thunderstorm Watch 456

Issued

Aug 22, 2021, 5:01 PM CDT (22:01 UTC)

Expired

Aug 22, 2021, 10:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

65 kt

The Grand Island radar (KUEX), 101 km from the middle of the area, began a volume at 22:02 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

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1577 Severe potential...watch possibleAug 22, 3:38 PM CDT
• Mesoscale Discussion 1579 Severe thunderstorm watch 456Aug 22, 7:06 PM CDT

588 
WWUS20 KWNS 222158
SEL6  
SPC WW 222158
KSZ000-NEZ000-230300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 456
NWS Storm Prediction Center Norman OK
500 PM CDT Sun Aug 22 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  North-central Kansas
  South-central Nebraska

* Effective this Sunday afternoon and evening from 500 PM until
  1000 PM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Isolated significant damaging wind gusts to 75 mph possible
  A tornado or two possible

SUMMARY...A couple splitting supercells may develop across central
portions of the Kansas-Nebraska border this evening.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 40 miles west northwest
of Hill City KS to 10 miles east southeast of Hastings NE. 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 455...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
24025.

...Grams

Severe Thunderstorm Watches in Nebraska, 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.