Severe Thunderstorm Watch 363

Issued

Jul 9, 2021, 9:58 PM CDT (02:58 UTC)

Expired

Jul 10, 2021, 5:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

70 kt

The Omaha radar (KOAX), 131 km from the middle of the area, began a volume at 02:59 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

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

60%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1219 Severe potential...watch needed soonJul 9, 7:54 PM CDT
• Mesoscale Discussion 1220 Severe thunderstorm watch 356Jul 9, 8:21 PM CDT
• Mesoscale Discussion 1222 Severe potential...severe thunderstorm watch likelyJul 9, 9:12 PM CDT
• Mesoscale Discussion 1223 Severe thunderstorm watch 363Jul 9, 10:20 PM CDT
• Mesoscale Discussion 1224 Tornado watch 359Jul 9, 10:26 PM CDT
• Mesoscale Discussion 1228 Tornado watch 359Jul 10, 1:01 AM CDT
• Mesoscale Discussion 1230 Severe thunderstorm watch 363Jul 10, 1:21 AM CDT
• Mesoscale Discussion 1233 Severe thunderstorm watch 363Jul 10, 2:57 AM CDT

022 
WWUS20 KWNS 100256
SEL3  
SPC WW 100256
IAZ000-KSZ000-MOZ000-NEZ000-101000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 363
NWS Storm Prediction Center Norman OK
1000 PM CDT Fri Jul 9 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Southwestern Iowa
  Northeastern Kansas
  Northwestern Missouri
  Eastern Nebraska

* Effective this Friday night and Saturday morning from 1000 PM
  until 500 AM CDT.

* Primary threats include...
  Widespread damaging winds and isolated significant gusts to 80
    mph likely
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter likely
  A tornado or two possible

SUMMARY...Multiple clusters of thunderstorms are expected to form
within and move into the watch area during the overnight hours.  The
storm environment and predominant cluster mode supports swaths of
damaging winds (some near 80 mph) as the main threat, though more
isolated supercells early in the watch could produce hail close to
tennis ball size.  An isolated tornado or two may also occur with
storm interactions.

The severe thunderstorm watch area is approximately along and 100
statute miles east and west of a line from 40 miles east northeast
of Tekamah NE to 20 miles southeast of Topeka KS. 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 356...WW 357...WW
358...WW 359...WW 360...WW 361...WW 362...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
31035.

...Thompson

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.