Tornado Watch 469

Issued

Aug 28, 2021, 3:44 PM CDT (20:44 UTC)

Expired

Aug 28, 2021, 8:51 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

70 kt

Counties Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Brookings County, SD, Lake County, SD, Moody County, SD

The Sioux Falls radar (KFSD), 74 km from the middle of the area, began a volume at 20:45 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

30%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1630 Severe potential...watch possibleAug 28, 2:43 PM CDT
• Mesoscale Discussion 1631 Tornado watch 469Aug 28, 5:27 PM CDT
• Mesoscale Discussion 1633 Severe thunderstorm watch 471Aug 28, 6:09 PM CDT
• Mesoscale Discussion 1635 Tornado watch 469Aug 28, 7:44 PM CDT

502 
WWUS20 KWNS 282041
SEL9  
SPC WW 282041
MNZ000-SDZ000-290200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 469
NWS Storm Prediction Center Norman OK
345 PM CDT Sat Aug 28 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southwest Minnesota
  Southeast South Dakota

* Effective this Saturday afternoon and evening from 345 PM until
  900 PM CDT.

* Primary threats include...
  A couple tornadoes possible
  Scattered damaging winds and isolated significant gusts to 80
    mph possible
  Isolated very large hail events to 2 inches in diameter possible

SUMMARY...A couple supercells may become sustained along an remnant
outflow boundary this evening within a broader convective cluster.

The tornado watch area is approximately along and 35 statute miles
north and south of a line from 20 miles west southwest of Brookings
SD to 30 miles northeast of Worthington MN. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU9).

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.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 26030.

...Grams

Tornado Watches in Minnesota, 2021Tornado Watches in South Dakota, 2021Every tornado 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.