Severe Thunderstorm Watch 158

Issued

May 9, 2021, 2:27 PM CDT (19:27 UTC)

Expired

May 9, 2021, 9:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Memphis radar (KNQA), 51 km from the middle of the area, began a volume at 19:31 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

60%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 568 Severe potential...watch likelyMay 9, 12:14 PM CDT
• Mesoscale Discussion 572 Severe thunderstorm watch 157...158May 9, 3:42 PM CDT
• Mesoscale Discussion 574 Severe thunderstorm watch 157May 9, 5:41 PM CDT
• Mesoscale Discussion 575 Severe thunderstorm watch 158May 9, 5:48 PM CDT
• Mesoscale Discussion 576 Severe thunderstorm watch 158May 9, 6:40 PM CDT

599 
WWUS20 KWNS 091925
SEL8  
SPC WW 091925
ARZ000-MSZ000-TNZ000-100200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 158
NWS Storm Prediction Center Norman OK
225 PM CDT Sun May 9 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Extreme eastern Arkansas
  Northern Mississippi
  Southwestern Tennessee

* Effective this Sunday afternoon and evening from 225 PM until
  900 PM CDT.

* Primary threats include...
  Scattered large hail likely with isolated very large hail events
    to 2 inches in diameter possible
  Scattered damaging wind gusts to 70 mph likely
  A tornado or two possible

SUMMARY...Thunderstorms are expected to increase in coverage and
intensity while spreading generally eastward from Arkansas into
Tennessee and northern Mississippi through the afternoon/evening. 
The storm environment will favor supercells and organized clusters
capable of producing large hail and damaging winds.  A tornado or
two will also be possible with the most persistent supercells.

The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 65 miles west southwest
of Memphis TN to 45 miles northeast of Tupelo MS. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).

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 157...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28025.

...Thompson

Severe Thunderstorm Watches in Mississippi, 2021Severe Thunderstorm Watches in Tennessee, 2021Severe Thunderstorm Watches in Arkansas, 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.