Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 132, NWS Twin Cities, MN

October 9, 2021Stevens County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Oct 9, 2021, 7:19 PM CDT for Stevens County, Swift County, Minnesota. It was in force for 41 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: Oct 9, 2021, 7:19 PM CDT (00:19 UTC)
Expired: Oct 9, 2021, 8:00 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Stevens County, MN, Swift County, MN

The radar

The Aberdeen radar (KABR), 185 km from the middle of the area, began a volume at 00:17 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
Oct 9, 6:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.3 hours before the alert went out and 194 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1552 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

517 
WUUS53 KMPX 100019
SVRMPX
MNC149-151-100100-
/O.NEW.KMPX.SV.W.0132.211010T0019Z-211010T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
719 PM CDT Sat Oct 9 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Stevens County in west central Minnesota...
  Western Swift County in west central Minnesota...

* Until 800 PM CDT.

* At 719 PM CDT, a severe thunderstorm was located over Trinity
  Lutheran Country Church, or 14 miles southeast of Wheaton, moving
  northeast at 50 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  Stevens and western Swift Counties, including the following
  locations... Fish Lake, Appleton Airport, Alberta, Morris Airport
  and Holloway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in the Twin Cities.

&&

LAT...LON 4575 9625 4576 9576 4542 9575 4541 9573
      4515 9604 4518 9610 4524 9610 4524 9612
      4541 9612 4542 9625
TIME...MOT...LOC 0019Z 210DEG 44KT 4563 9633 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 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
Oct 9, 7:13 PM CDT	Special Weather Statement	MPX	Lac qui Parle, Yellow Medicine	62 min
Oct 9, 7:35 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	25 min
Oct 9, 7:56 PM CDT	Severe Thunderstorm Warning	MPX	Stevens, Swift	49 min
Oct 9, 7:58 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	47 min
Oct 9, 8:15 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope	45 min
Oct 9, 10:59 PM CDT	Special Weather Statement	MPX	Chippewa, Lac qui Parle, Pope, Swift, Todd, Yellow Medicine	3 hr

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.