Tornado Watch 252

Issued

May 19, 2017, 9:42 PM CDT (02:42 UTC)

Expired

May 20, 2017, 5:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Springfield radar (KSGF), 109 km from the middle of the area, began a volume at 02:42 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 788May 19, 6:04 PM CDT
• Mesoscale Discussion 790May 19, 6:56 PM CDT
• Mesoscale Discussion 793May 19, 9:16 PM CDT
• Mesoscale Discussion 796May 19, 11:51 PM CDT
• Mesoscale Discussion 797May 20, 1:45 AM CDT

410 
WWUS20 KWNS 200240
SEL2  
SPC WW 200240
ARZ000-MOZ000-OKZ000-201000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 252
NWS Storm Prediction Center Norman OK
945 PM CDT Fri May 19 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Northwest and Northern Arkansas
  Southwest and South-Central Missouri
  Eastern Oklahoma

* Effective this Friday night and Saturday morning from 945 PM
  until 500 AM CDT.

* Primary threats include...
  A few tornadoes possible
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...A line of strong to severe thunderstorms will continue to
track northeastward across the watch area through the early morning
hours.  Strong wind shear will maintain a risk of locally damaging
wind gusts, large hail, and a few tornadoes in the most intense
storms.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 60 miles north of West Plains MO to 50
miles south southeast of Mcalester OK. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU2).

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 248...WW 249...WW 251...

AVIATION...Tornadoes and 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 24035.

...Hart

Tornado Watches in Arkansas, 2017Tornado Watches in Missouri, 2017Tornado Watches in Oklahoma, 2017Every tornado watch in 2017

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.