Tornado Watch 558

Issued

Dec 10, 2021, 10:44 PM CST (04:44 UTC)

Expired

Dec 11, 2021, 5:00 AM CST

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

65 kt

The Memphis radar (KNQA), 74 km from the middle of the area, began a volume at 04:47 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

60%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1991 Tornado watch 552...555Dec 10, 7:34 PM CST
• Mesoscale Discussion 1992 Tornado watch 552Dec 10, 7:41 PM CST
• Mesoscale Discussion 1994 Tornado watch 554Dec 10, 8:35 PM CST
• Mesoscale Discussion 1998 Tornado watch 552...554Dec 10, 9:40 PM CST
• Mesoscale Discussion 2000 Tornado watch 555Dec 10, 10:00 PM CST
• Mesoscale Discussion 2001 Tornado watch 552Dec 10, 10:09 PM CST
• Mesoscale Discussion 2006 Tornado watch 554Dec 10, 11:36 PM CST
• Mesoscale Discussion 2013 Tornado watch 558Dec 11, 2:00 AM CST
• Mesoscale Discussion 2015 Tornado watch 558Dec 11, 2:51 AM CST
• Mesoscale Discussion 2016 Tornado watch 558Dec 11, 3:15 AM CST

714 
WWUS20 KWNS 110442
SEL8  
SPC WW 110442
ARZ000-LAZ000-MSZ000-TNZ000-TXZ000-111100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 558
NWS Storm Prediction Center Norman OK
1045 PM CST Fri Dec 10 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southern and eastern Arkansas
  Northern Louisiana
  Northern Mississippi
  Western to middle Tennessee
  Far northeast Texas

* Effective this Friday night and Saturday morning from 1045 PM
  until 500 AM CST.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...Several clusters with embedded supercells should
consolidate into a broader QLCS overnight. A couple discrete
supercells may yet form in the open warm sector from northern
Louisiana into northern Mississippi.

The tornado watch area is approximately along and 75 statute miles
east and west of a line from 35 miles northwest of Nashville TN to
20 miles southeast of Shreveport LA. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU8).

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 552...WW 553...WW
554...WW 555...WW 556...WW 557...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 24040.

...Grams

Tornado Watches in Tennessee, 2021Tornado Watches in Mississippi, 2021Tornado Watches in Arkansas, 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.