Tornado Watch 450

Issued

Aug 19, 2021, 5:25 PM MDT (23:25 UTC)

Expired

Aug 19, 2021, 11:00 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The North Platte radar (KLNX), 150 km from the middle of the area, began a volume at 23:28 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1563 Severe thunderstorm watch 449Aug 19, 5:17 PM MDT
• Mesoscale Discussion 1564 Tornado watch 450Aug 19, 8:27 PM MDT

643 
WWUS20 KWNS 192322
SEL0  
SPC WW 192322
COZ000-KSZ000-NEZ000-200500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 450
NWS Storm Prediction Center Norman OK
625 PM CDT Thu Aug 19 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Extreme northeast Colorado
  Northwest Kansas
  Southwest Nebraska

* Effective this Thursday night from 625 PM until Midnight CDT.

* Primary threats include...
  A few tornadoes possible
  Scattered damaging wind gusts to 70 mph likely
  Scattered large hail events to 1.5 inches in diameter possible

SUMMARY...Clusters of supercells will likely persist through the
late evening and early overnight hours, as the storm environment
becomes more favorable for a few tornadoes, in addition to damaging
winds and large hail.

The tornado watch area is approximately along and 65 statute miles
east and west of a line from 70 miles northwest of North Platte NE
to 20 miles south southeast of Goodland KS. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 449...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 24020.

...Thompson

Tornado Watches in Nebraska, 2021Tornado Watches in Colorado, 2021Tornado Watches in Kansas, 2021Every tornado 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.