Severe Thunderstorm Watch 258

Issued

Jun 11, 2021, 8:30 AM CDT (13:30 UTC)

Expired

Jun 11, 2021, 3:54 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

70 kt

The Topeka radar (KTWX), 123 km from the middle of the area, began a volume at 13:34 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

60%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 920 Severe thunderstorm watch 257Jun 11, 7:28 AM CDT
• Mesoscale Discussion 922 Severe thunderstorm watch 258Jun 11, 10:28 AM CDT
• Mesoscale Discussion 925 Severe thunderstorm watch 259Jun 11, 2:52 PM CDT

090 
WWUS20 KWNS 111327
SEL8  
SPC WW 111327
IAZ000-KSZ000-MOZ000-NEZ000-112000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 258
NWS Storm Prediction Center Norman OK
830 AM CDT Fri Jun 11 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Southwest Iowa
  Northeast Kansas
  Northwest Missouri
  Southeast Nebraska

* Effective this Friday morning and afternoon from 830 AM until
  300 PM CDT.

* Primary threats include...
  Scattered damaging winds likely with isolated significant gusts
    to 80 mph possible
  Isolated very large hail events to 2 inches in diameter possible

SUMMARY...An MCS over eastern Nebraska should progress southeast
through early to mid-afternoon. Severe potential may remain isolated
this morning, but should increase in coverage and intensity by
midday. Damaging winds will be the primary hazard.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 45 miles east southeast
of Shenandoah IA to 50 miles southwest of Beatrice NE. 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 257...

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
32030.

...Grams

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