Tornado Watch 251

Issued

Jun 10, 2021, 2:30 PM MDT (20:30 UTC)

Expired

Jun 10, 2021, 8:55 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

4 in

Strongest gust expected

60 kt

Counties Daniels County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Mountrail County, ND, Slope County, ND, Stark County, ND, Williams County, ND

The Glasgow radar (KGGW), 173 km from the middle of the area, began a volume at 20:31 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

50%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

80%

One or more hailstones of 2 inches or more

80%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 908 Severe potential...tornado watch likelyJun 10, 1:56 PM MDT
• Mesoscale Discussion 910 Tornado watch 251Jun 10, 4:36 PM MDT
• Mesoscale Discussion 914 Tornado watch 251Jun 10, 7:30 PM MDT

508 
WWUS20 KWNS 102026
SEL1  
SPC WW 102026
MTZ000-NDZ000-110300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 251
NWS Storm Prediction Center Norman OK
225 PM MDT Thu Jun 10 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Northeast Montana
  Western North Dakota

* Effective this Thursday afternoon and evening from 225 PM until
  900 PM MDT.

* Primary threats include...
  A few tornadoes and a couple intense tornadoes possible
  Widespread large hail and scattered very large hail events to 4
    inches in diameter likely
  Scattered damaging wind gusts to 70 mph likely

SUMMARY...Intense thunderstorms including supercells will likely
rapid develop through mid/late afternoon from east-central/northeast
Montana into western South Dakota. Of greatest concern as far as
intense supercells and a tornado risk will be those storms occurring
near a west-east warm front across the region, where low-level
moisture/shear will be maximized. A strong tornado is possible.

The tornado watch area is approximately along and 80 statute miles
north and south of a line from 10 miles north northwest of Wolf
Point MT to 70 miles east southeast of Williston ND. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).

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 4 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 22020.

...Guyer

Tornado Watches in North Dakota, 2021Tornado Watches in Montana, 2021Every tornado 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.