Severe Thunderstorm Watch 338

Issued

Jul 6, 2021, 2:01 PM CDT (19:01 UTC)

Expired

Jul 6, 2021, 10:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Minneapolis radar (KMPX), 119 km from the middle of the area, began a volume at 19:02 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

10%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1162 Severe potential...watch possibleJul 6, 1:06 PM CDT
• Mesoscale Discussion 1163 Severe potential...watch likelyJul 6, 1:44 PM CDT
• Mesoscale Discussion 1168 Severe thunderstorm watch 338Jul 6, 5:22 PM CDT
• Mesoscale Discussion 1171 Severe thunderstorm watch 338Jul 6, 8:00 PM CDT

283 
WWUS20 KWNS 061858
SEL8  
SPC WW 061858
IAZ000-MNZ000-NEZ000-SDZ000-WIZ000-070300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 338
NWS Storm Prediction Center Norman OK
200 PM CDT Tue Jul 6 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern Iowa
  Southern Minnesota
  Far Northeast Nebraska
  Far Southeast South Dakota
  Central and Southern Wisconsin

* Effective this Tuesday afternoon and evening from 200 PM until
  1000 PM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Isolated large hail events to 1.5 inches in diameter possible
  A tornado or two possible

SUMMARY...Clusters of storms will develop generally eastward within
multiple corridors across the region near a boundary through
early/mid-evening. Damaging winds and some severe hail are expected
to the primary hazards.

The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 65 miles west southwest
of Worthington MN to 25 miles southeast of Green Bay WI. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU8).

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 335...WW 336...WW 337...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
27025.

...Guyer

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