Severe Thunderstorm Watch 464

Issued

Aug 26, 2021, 8:03 PM CDT (01:03 UTC)

Expired

Aug 27, 2021, 3:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Two or more tornadoes

10%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

50%

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

80%

• Mesoscale Discussion 1613 Severe potential...watch possibleAug 26, 5:34 PM CDT
• Mesoscale Discussion 1614 Severe potential...watch possibleAug 26, 7:25 PM CDT
• Mesoscale Discussion 1615 Severe potential...watch possibleAug 26, 10:45 PM CDT

571 
WWUS20 KWNS 270101
SEL4  
SPC WW 270101
NEZ000-SDZ000-270800-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 464
NWS Storm Prediction Center Norman OK
800 PM CDT Thu Aug 26 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern Nebraska
  Southern South Dakota

* Effective this Thursday night and Friday morning from 800 PM
  until 300 AM 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 and increase in
coverage this evening and pose a risk for damaging winds and large
hail.

The severe thunderstorm watch area is approximately along and 95
statute miles north and south of a line from 35 miles north
northwest of Chadron NE to 20 miles northeast of Yankton SD. 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.

&&

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
24030.

...Bunting

Severe Thunderstorm Watches in South Dakota, 2021Severe Thunderstorm Watches in Nebraska, 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.