Tornado Watch 323

Issued

Jun 13, 2017, 3:13 PM CDT (20:13 UTC)

Expired

Jun 13, 2017, 10:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

60 kt

The Sioux Falls radar (KFSD), 170 km from the middle of the area, began a volume at 20:15 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

60%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

95%

One or more hailstones of 2 inches or more

70%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1013Jun 13, 2:32 PM CDT
• Mesoscale Discussion 1015Jun 13, 3:46 PM CDT
• Mesoscale Discussion 1017Jun 13, 5:43 PM CDT
• Mesoscale Discussion 1021Jun 13, 8:34 PM CDT

492 
WWUS20 KWNS 132011
SEL3  
SPC WW 132011
MNZ000-NEZ000-SDZ000-140300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 323
NWS Storm Prediction Center Norman OK
315 PM CDT Tue Jun 13 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Extreme western Minnesota
  North Central Nebraska
  Eastern South Dakota

* Effective this Tuesday afternoon and evening from 315 PM until
  1000 PM CDT.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Widespread large hail expected with isolated very large hail
    events to 3 inches in diameter likely
  Isolated damaging wind gusts to 70 mph possible

SUMMARY...Thunderstorms will form soon across parts of central SD/NE
and spread across the watch area.  Supercells capable of very large
hail and damaging winds will be possible, along with the risk of a
few tornadoes.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 20 miles south of Burwell NE to 50
miles northeast of Aberdeen SD. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU3).

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.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 24035.

...Hart

Tornado Watches in South Dakota, 2017Tornado Watches in Nebraska, 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.