Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 87, NWS Twin Cities, MN

August 24, 20214 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 24, 2021, 5:59 AM CDT for 4 counties in Minnesota. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 24, 2021, 5:59 AM CDT (10:59 UTC)
Expired: Aug 24, 2021, 6:30 AM CDT
In force: 31 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Carver County, MN, McLeod County, MN, Renville County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 38 km from the middle of the area, began a volume at 11:01 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 24, 2:17 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.0 hours before the alert went out and 35 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 501 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1780 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

173 
WUUS53 KMPX 241059
SVRMPX
MNC019-085-129-143-241130-
/O.NEW.KMPX.SV.W.0087.210824T1059Z-210824T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
559 AM CDT Tue Aug 24 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Sibley County in central Minnesota...
  McLeod County in central Minnesota...
  Carver County in east central Minnesota...
  East central Renville County in central Minnesota...

* Until 630 AM CDT.

* At 559 AM CDT, a severe thunderstorm was located near Lester
  Prairie, or 14 miles east of Hutchinson, moving east at 45 mph.

  HAZARD...60 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Mayer around 610 AM CDT.
  Norwood Young America around 615 AM CDT.

Other locations in the path of this severe thunderstorm include
Waconia, Cologne, Chaska and Carver.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4446 9463 4471 9463 4481 9449 4498 9450
      4496 9400 4498 9400 4498 9377 4489 9376
      4489 9352 4481 9352 4476 9362 4471 9362
      4459 9389 4455 9391 4451 9388 4446 9393
TIME...MOT...LOC 1059Z 286DEG 40KT 4484 9409 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CTG

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 24, 2:55 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Le Sueur, Scott, Sibley	35 min
Aug 24, 3:16 AM CDT	Special Weather Statement	MPX	Chippewa, Douglas, Lac qui Parle, Pope, Stevens, Swift	29 min
Aug 24, 3:28 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	32 min
Aug 24, 3:32 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stevens, Swift	43 min
Aug 24, 3:48 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Rice	42 min
Aug 24, 3:52 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift, Yellow Medicine	38 min
Aug 24, 4:08 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Stevens, Swift	52 min
Aug 24, 4:30 AM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Renville, Swift	45 min
Aug 24, 4:44 AM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Kandiyohi, McLeod, Meeker, Stearns	46 min
Aug 24, 4:48 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Renville	42 min
Aug 24, 5:05 AM CDT	Special Weather Statement	MPX	Goodhue	40 min
Aug 24, 5:27 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, McLeod, Meeker, Renville, Wright	33 min
Aug 24, 5:29 AM CDT	Severe Thunderstorm Warning	MPX	Meeker, Sherburne, Stearns, Wright	46 min
Aug 24, 5:45 AM CDT	Special Weather Statement	MPX	Brown, Nicollet, Redwood, Renville, Sibley	30 min
Aug 24, 5:57 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Sherburne, Wright	33 min
Aug 24, 6:19 AM CDT	Special Weather Statement	MPX	Carver, Le Sueur, Nicollet, Rice, Scott, Sibley	26 min
Aug 24, 6:25 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington	35 min
Aug 24, 6:53 AM CDT	Special Weather Statement	MPX	Dakota, Goodhue, Le Sueur, Rice, Scott	67 min
Aug 24, 6:57 AM CDT	Special Weather Statement	MPX	Brown	33 min
Aug 24, 7:00 AM CDT	Special Weather Statement	MPX	Ramsey, Washington	30 min
Aug 24, 7:23 AM CDT	Special Weather Statement	MPX	Nicollet, Sibley	37 min
Aug 24, 7:59 AM CDT	Special Weather Statement	MPX	Le Sueur, Sibley	31 min
Aug 24, 8:01 AM CDT	Special Weather Statement	MPX	Wabasha	29 min
Aug 24, 8:04 AM CDT	Special Weather Statement	MPX	Redwood	26 min
Aug 24, 8:30 AM CDT	Special Weather Statement	MPX	Redwood	30 min
Aug 24, 8:39 AM CDT	Severe Thunderstorm Warning	MPX	McLeod, Sibley	21 min
Aug 24, 9:03 AM CDT	Special Weather Statement	MPX	Dakota	27 min
Aug 24, 9:41 AM CDT	Special Weather Statement	MPX	Brown, Nicollet, Watonwan	49 min
Aug 24, 10:23 AM CDT	Special Weather Statement	MPX	Martin	37 min
Aug 24, 10:35 AM CDT	Special Weather Statement	MPX	Blue Earth	25 min
Aug 24, 11:16 AM CDT	Special Weather Statement	MPX	Faribault, Martin	44 min
Aug 24, 12:20 PM CDT	Special Weather Statement	MPX	Freeborn	40 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2021 Every severe thunderstorm warning in 2021

Sources

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.