Severe Thunderstorm Watch 253

Issued

Jun 10, 2021, 8:08 PM MDT (02:08 UTC)

Expired

Jun 11, 2021, 2:00 AM MDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

70 kt

The Rapid City radar (KUDX), 110 km from the middle of the area, began a volume at 02:12 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

10%

Ten or more severe wind reports

80%

One or more gusts of 65 knots or more

70%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 913 Severe potential...watch likelyJun 10, 7:28 PM MDT
• Mesoscale Discussion 915 Severe thunderstorm watch 253...254Jun 10, 10:07 PM MDT
• Mesoscale Discussion 917 Severe thunderstorm watch 253Jun 10, 10:50 PM MDT
• Mesoscale Discussion 918 Severe potential...severe thunderstorm watch likelyJun 10, 11:52 PM MDT

953 
WWUS20 KWNS 110205
SEL3  
SPC WW 110205
NEZ000-SDZ000-110800-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 253
NWS Storm Prediction Center Norman OK
905 PM CDT Thu Jun 10 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  western and central Nebraska
  western and central South Dakota

* Effective this Thursday night and Friday morning from 905 PM
  until 300 AM CDT.

* Primary threats include...
  Widespread damaging winds and isolated significant gusts to 80
    mph likely
  Scattered large hail likely with isolated very large hail events
    to 2 inches in diameter possible
  A tornado or two possible

SUMMARY...Storms are expected to increase in coverage with initial
supercells possible, transitioning to a squall line. Large hail,
damaging wind and a couple of tornadoes are possible this evening
into tonight.

The severe thunderstorm watch area is approximately along and 120
statute miles east and west of a line from 75 miles west northwest
of Mobridge SD to 55 miles southeast of Alliance NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU3).

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 251...WW 252...

AVIATION...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
26035.

...Dial

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; radar from the NEXRAD Level II archive.