Severe Thunderstorm Watch 412

Issued

Aug 7, 2021, 4:01 PM CDT (21:01 UTC)

Expired

Aug 7, 2021, 11:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

65 kt

The Dodge City radar (KDDC), 162 km from the middle of the area, began a volume at 21:02 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

5%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

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 1433 Severe potential...watch likelyAug 7, 3:34 PM CDT
• Mesoscale Discussion 1436 Severe thunderstorm watch 412Aug 7, 6:11 PM CDT
• Mesoscale Discussion 1438 Severe thunderstorm watch 412Aug 7, 8:20 PM CDT

574 
WWUS20 KWNS 072058
SEL2  
SPC WW 072058
COZ000-KSZ000-OKZ000-TXZ000-080200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 412
NWS Storm Prediction Center Norman OK
400 PM CDT Sat Aug 7 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Extreme east central and southeastern Colorado
  Western Kansas
  The Oklahoma Panhandle
  The northern Texas Panhandle

* Effective this Saturday afternoon and evening from 400 PM until
  900 PM CDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph possible
  Isolated very large hail events to 2 inches in diameter possible

SUMMARY...High-based thunderstorm development is underway along and
ahead of a cold front moving southeastward across eastern Colorado. 
The storm environment ahead of the front will favor a mix of
supercells and multicell clusters capable of producing severe
outflow winds up to 75 mph, as well as isolated large hail of 1 to 2
inch diameter through this evening.

The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 20 miles west southwest
of Borger TX to 85 miles north of Garden City KS. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU2).

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.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
27025.

...Thompson

Severe Thunderstorm Watches in Kansas, 2021Severe Thunderstorm Watches in Texas, 2021Severe Thunderstorm Watches in Oklahoma, 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.