Tornado Watch 235

Issued

Jun 28, 2018, 3:42 PM MDT (21:42 UTC)

Expired

Jun 28, 2018, 11:00 PM MDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

4 in

Strongest gust expected

70 kt

Counties Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Garfield County, MT, McCone County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Rosebud County, MT, Treasure County, MT, Wibaux County, MT

The Glasgow radar (KGGW), 174 km from the middle of the area, began a volume at 21:41 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

20%

Ten or more severe wind reports

80%

One or more gusts of 65 knots or more

70%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

70%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 923Jun 28, 2:35 PM MDT
• Mesoscale Discussion 929Jun 28, 5:59 PM MDT
• Mesoscale Discussion 933Jun 28, 8:06 PM MDT

946 
WWUS20 KWNS 282139
SEL5  
SPC WW 282139
MTZ000-SDZ000-290500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 235
NWS Storm Prediction Center Norman OK
340 PM MDT Thu Jun 28 2018

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Eastern Montana
  Northwestern South Dakota

* Effective this Thursday afternoon and evening from 340 PM until
  1100 PM MDT.

* Primary threats include...
  A few tornadoes likely
  Widespread damaging winds and isolated significant gusts to 80
    mph likely
  Scattered large hail and isolated very large hail events to 4
    inches in diameter likely

SUMMARY...Severe thunderstorms, including a few supercells with
tornadoes and very large/damaging hail, are expected to develop over
the MT part of the watch area and ultimately move/spread into
portions of the Dakotas.  The threat for severe wind will increase
as activity interacts with very rich low-level moisture and congeals
into clusters this evening.

The tornado watch area is approximately along and 80 statute miles
north and south of a line from 95 miles west of Miles City MT to 10
miles northeast of Baker MT. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU5).

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 231...WW 232...WW
233...WW 234...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 4 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 650. Mean
storm motion vector 27035.

...Edwards

Tornado Watches in Montana, 2018Every tornado watch in 2018

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.