Severe Thunderstorm Watch 25

Issued

Mar 17, 2021, 4:37 AM CDT (09:37 UTC)

Expired

Mar 17, 2021, 10:00 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Shreveport radar (KSHV), 152 km from the middle of the area, began a volume at 09:39 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

40%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 190 Severe potential...watch possibleMar 17, 1:32 AM CDT
• Mesoscale Discussion 193 Severe potential...watch likelyMar 17, 4:04 AM CDT
• Mesoscale Discussion 197 Severe thunderstorm watch 25Mar 17, 6:40 AM CDT

896 
WWUS20 KWNS 170935
SEL5  
SPC WW 170935
ARZ000-LAZ000-OKZ000-TXZ000-171500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 25
NWS Storm Prediction Center Norman OK
435 AM CDT Wed Mar 17 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Southwest Arkansas
  Extreme northwest Louisiana
  Southeast Oklahoma
  Northeast Texas

* Effective this Wednesday morning from 435 AM until 1000 AM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Scattered large hail events to 1.5 inches in diameter possible
  A tornado or two possible

SUMMARY...A broken band of strong-severe storms will continue to
spread east-northeastward from the Dallas-Fort Worth area toward
Texarkana through the morning.  Damaging winds and large hail will
be the main threats, but the storm environment still suggests some
potential for embedded circulations with a tornado or two possible.

The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 55 miles northwest of De
Queen AR to 40 miles south of Tyler TX. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU5).

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 23...WW 24...

AVIATION...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 500. Mean storm motion vector
24040.

...Thompson

Severe Thunderstorm Watches in Texas, 2021Severe Thunderstorm Watches in Arkansas, 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.