Severe Thunderstorm Watch 71

Issued

Mar 9, 2017, 3:52 PM CST (21:52 UTC)

Expired

Mar 9, 2017, 11:00 PM CST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

Counties Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK

The Tulsa radar (KINX), 49 km from the middle of the area, began a volume at 21:51 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

10%

Ten or more severe wind reports

30%

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

40%

Six or more combined severe hail and wind reports

60%

• Mesoscale Discussion 275Mar 9, 1:04 PM CST
• Mesoscale Discussion 279Mar 9, 5:36 PM CST
• Mesoscale Discussion 282Mar 9, 9:30 PM CST

594 
WWUS20 KWNS 092151
SEL1  
SPC WW 092151
ARZ000-OKZ000-100500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 71
NWS Storm Prediction Center Norman OK
355 PM CST Thu Mar 9 2017

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northwest Arkansas
  Northeast Oklahoma

* Effective this Thursday afternoon and evening from 355 PM until
  1100 PM CST.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter possible
  Isolated damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Isolated to scattered storms should develop across far
southeast Kansas into northeast Oklahoma and spread east-southeast
this evening with a primary risk of large hail.

The severe thunderstorm watch area is approximately along and 50
statute miles either side of a line from 45 miles north of Tulsa OK
to 35 miles east southeast of Fayetteville AR. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).

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 70...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28030.

...Grams

Severe Thunderstorm Watches in Oklahoma, 2017Severe Thunderstorm Watches in Arkansas, 2017Every severe thunderstorm 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.