Tornado Watch 523

Issued

Oct 12, 2021, 5:34 PM CDT (22:34 UTC)

Expired

Oct 12, 2021, 11:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Altus AFB radar (KFDR), 150 km from the middle of the area, began a volume at 22:36 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

70%

One or more EF2 to EF5 tornadoes

50%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1838 Outlook upgradeOct 12, 2:29 PM CDT
• Mesoscale Discussion 1839 Severe potential...tornado watch likelyOct 12, 3:08 PM CDT
• Mesoscale Discussion 1840 Severe potential...tornado watch likelyOct 12, 3:14 PM CDT
• Mesoscale Discussion 1842 Tornado watch 523Oct 12, 7:30 PM CDT
• Mesoscale Discussion 1844 Tornado watch 523Oct 12, 9:18 PM CDT

204 
WWUS20 KWNS 122232
SEL3  
SPC WW 122232
OKZ000-TXZ000-130400-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 523
NWS Storm Prediction Center Norman OK
530 PM CDT Tue Oct 12 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Western Oklahoma
  Northwest Texas

* Effective this Tuesday afternoon and evening from 530 PM until
  1100 PM CDT.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Scattered large hail and isolated very large hail events to 3
    inches in diameter likely
  Scattered damaging winds and isolated significant gusts to 80
    mph possible

SUMMARY...At least isolated intense supercells are expected to
develop this evening across western Oklahoma and the eastern Texas
Panhandle/western North Texas near a northward-shifting warm front
and a dryline. The environment will be very supportive of intense
supercells capable of large hail and a tornado risk, potentially
including a couple of strong tornadoes given seasonally rare
low-level moisture and strengthening low-level shear/helicity.

The tornado watch area is approximately along and 75 statute miles
east and west of a line from 55 miles east northeast of Guymon OK to
50 miles southwest of Wichita Falls TX. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU3).

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 522...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 22030.

...Guyer

Tornado Watches in Oklahoma, 2021Tornado Watches in Texas, 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.