Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS Twin Cities, MN

April 5, 2021Kanabec County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 5, 2021, 10:10 PM CDT for Kanabec County, Minnesota. It was in force for 20 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
Apr 5, 2021, 10:10 PM CDT (03:10 UTC)
Expired
Apr 5, 2021, 10:30 PM CDT
In force
20 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

County Kanabec County, MN

The radar

The Duluth radar (KDLH), 124 km from the middle of the area, began a volume at 03:13 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.2 hours before the alert went out and 125 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2021-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1134 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2021-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1134 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
2481 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
256 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

192 
WUUS53 KMPX 060310
SVRMPX
MNC065-060330-
/O.NEW.KMPX.SV.W.0009.210406T0310Z-210406T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1010 PM CDT Mon Apr 5 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Kanabec County in east central Minnesota...

* Until 1030 PM CDT.

* At 1010 PM CDT, a severe thunderstorm was located over Quamba, or
  13 miles west of Hinckley, moving east at 30 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts. Golf ball size 
           hail was reported north of Mora.

  SOURCE...Trained weather spotters.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  central Kanabec County, including the following locations... Knife
  Lake and Mora Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4598 9306 4598 9314 4582 9314 4582 9315
      4583 9335 4602 9336 4604 9306
TIME...MOT...LOC 0310Z 255DEG 27KT 4595 9321 

HAIL...1.75IN
WIND...60MPH
 
$$

TDH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 7:37 PM CDTSpecial Weather StatementMPXRenville38 min
Apr 5, 7:40 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright50 min
Apr 5, 8:19 PM CDTSpecial Weather StatementMPXKandiyohi, Meeker41 min
Apr 5, 8:26 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti, Sherburne, Wright49 min
Apr 5, 8:59 PM CDTSpecial Weather StatementMPXRedwood46 min
Apr 5, 9:00 PM CDTSpecial Weather StatementMPXMeeker45 min
Apr 5, 9:10 PM CDTSpecial Weather StatementMPXSherburne35 min
Apr 5, 9:16 PM CDTSevere Thunderstorm WarningMPXSherburne, Stearns, Wright29 min
Apr 5, 9:20 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker25 min
Apr 5, 9:30 PM CDTSpecial Weather StatementMPXRenville30 min
Apr 5, 9:45 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright45 min
Apr 5, 9:48 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs31 min
Apr 5, 9:54 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Meeker, Wright36 min
Apr 5, 10:07 PM CDTSpecial Weather StatementMPXKanabec8 min
Apr 5, 10:27 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, McLeod, Wright33 min
Apr 5, 10:34 PM CDTSpecial Weather StatementMPXKanabec26 min
Apr 5, 10:37 PM CDTSpecial Weather StatementMPXWright23 min
Apr 5, 10:59 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Wright46 min
Apr 5, 11:03 PM CDTSpecial Weather StatementMPXHennepin, Ramsey, Scott42 min
Apr 5, 11:36 PM CDTSpecial Weather StatementMPXAnoka39 min
Apr 5, 11:45 PM CDTSpecial Weather StatementMPXAnoka45 min
Apr 5, 11:49 PM CDTSpecial Weather StatementMPXDakota, Washington41 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2021Every 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.