Severe Thunderstorm Watch 203

Issued

May 25, 2021, 3:53 PM EDT (19:53 UTC)

Expired

May 25, 2021, 11:28 PM EDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Marquette radar (KMQT), 204 km from the middle of the area, began a volume at 19:54 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

2%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 735 Severe potential...watch possibleMay 25, 3:15 PM EDT
• Mesoscale Discussion 738 Severe thunderstorm watch 203May 25, 6:17 PM EDT
• Mesoscale Discussion 741 Severe thunderstorm watch 203May 25, 8:56 PM EDT

080 
WWUS20 KWNS 251950
SEL3  
SPC WW 251950
MIZ000-MNZ000-WIZ000-LSZ000-260300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 203
NWS Storm Prediction Center Norman OK
250 PM CDT Tue May 25 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Upper Michigan
  Southeast Minnesota
  Western and Northern Wisconsin
  Lake Superior

* Effective this Tuesday afternoon and evening from 250 PM until
  1000 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...At least isolated to widely scattered thunderstorms are
expected to develop and intensify this afternoon near/ahead of an
eastward-moving cold front. Very strong southwesterly winds through
a deep layer will support fast-moving and well-organized storms
including a few initial supercells aside from evolving
bands/clusters of storms. At least isolated instances of severe hail
and damaging winds will be the most common hazards.

The severe thunderstorm watch area is approximately along and 90
statute miles east and west of a line from 60 miles north northeast
of Ironwood MI to 25 miles south southwest 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 450. Mean storm motion vector
26040.

...Guyer

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