Severe Thunderstorm Watch 366

Issued

Jul 10, 2021, 2:18 PM CDT (19:18 UTC)

Expired

Jul 10, 2021, 8:51 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Omaha radar (KOAX), 83 km from the middle of the area, began a volume at 19:21 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

2%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

20%

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

70%

• Mesoscale Discussion 1237 Severe potential...watch possibleJul 10, 1:20 PM CDT
• Mesoscale Discussion 1243 Severe thunderstorm watch 366Jul 10, 3:44 PM CDT
• Mesoscale Discussion 1245 Severe thunderstorm watch 366Jul 10, 5:27 PM CDT
• Mesoscale Discussion 1248 Severe thunderstorm watch 366Jul 10, 7:39 PM CDT

159 
WWUS20 KWNS 101915
SEL6  
SPC WW 101915
IAZ000-KSZ000-MOZ000-NEZ000-110300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 366
NWS Storm Prediction Center Norman OK
215 PM CDT Sat Jul 10 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 Saturday afternoon and evening from 215 PM until
  1000 PM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Isolated very large hail events to 2 inches in diameter possible
  A tornado or two possible

SUMMARY...Thunderstorms will continue to develop and move southeast
across the watch area through this evening with a risk for damaging
winds and isolated large hail.

The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 30 miles north of Omaha
NE to 35 miles south of Falls City 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 365...

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
29035.

...Bunting

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