Severe Thunderstorm Watch 293

Issued

Jun 20, 2021, 1:42 PM CDT (18:42 UTC)

Expired

Jun 20, 2021, 9:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Minneapolis radar (KMPX), 140 km from the middle of the area, began a volume at 18:45 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

50%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1033 Severe potential...watch possibleJun 20, 1:10 PM CDT
• Mesoscale Discussion 1037 Severe thunderstorm watch 293Jun 20, 5:22 PM CDT

179 
WWUS20 KWNS 201839
SEL3  
SPC WW 201839
IAZ000-MNZ000-WIZ000-210200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 293
NWS Storm Prediction Center Norman OK
145 PM CDT Sun Jun 20 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern Iowa
  Southeast Minnesota
  Southwest Wisconsin

* Effective this Sunday afternoon and evening from 145 PM until
  900 PM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Thunderstorms are expected to intensify this afternoon
along front sagging across the watch area.  A few supercells may
develop, posing a risk of damaging winds, large hail, and perhaps a
tornado.

The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 30 miles southwest of
Fairmont MN to 45 miles east southeast of La Crosse WI. 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.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27035.

...Hart

Severe Thunderstorm Watches in Iowa, 2021Severe Thunderstorm Watches in Minnesota, 2021Severe Thunderstorm Watches in Wisconsin, 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.