Severe Thunderstorm Watch 353

Issued

Jul 8, 2021, 3:38 PM MDT (21:38 UTC)

Expired

Jul 8, 2021, 10:00 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

65 kt

The Minot AFB radar (KMBX), 116 km from the middle of the area, began a volume at 21:40 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

5%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1202 Severe thunderstorm watch 352Jul 8, 2:34 PM MDT
• Mesoscale Discussion 1205 Severe thunderstorm watch 352...353...354Jul 8, 4:56 PM MDT

070 
WWUS20 KWNS 082123
SEL3  
SPC WW 082123
NDZ000-090400-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 353
NWS Storm Prediction Center Norman OK
325 PM MDT Thu Jul 8 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Western North Dakota

* Effective this Thursday afternoon and evening from 325 PM until
  1000 PM MDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph likely
  Scattered large hail and isolated very large hail events to 3
    inches in diameter likely
  A tornado or two possible

SUMMARY...Severe storms developing in Montana will spread into
western North Dakota through the remainder of this afternoon and
into late evening.  A mix of clusters and supercells will pose a
threat for very large hail (near the size of baseballs), significant
outflow gusts (near 75 mph), and the possibility of a tornado or two
with the strongest supercells this evening.

The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 75 miles northwest of
Minot ND to 15 miles west of Lemmon SD. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU3).

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 350...WW 351...WW 352...

AVIATION...A few severe thunderstorms with hail surface and aloft to
3 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
33025.

...Thompson

Severe Thunderstorm Watches in North Dakota, 2021Every severe thunderstorm 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.