Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS Duluth, MN

July 26, 2021Itasca County, Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 26, 2021, 9:02 PM CDT for Itasca County, Saint Louis County, Minnesota. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 26, 2021, 9:02 PM CDT (02:02 UTC)
Expired: Jul 26, 2021, 9:29 PM CDT
In force: 27 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Itasca County, MN, Saint Louis County, MN

What was reported inside it

Time	Report	Where	Remark
Jul 26, 9:12 PM CDT	HAIL 1	4 Se Silica, MN	12 MILES SOUTH OF HIBBING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 26, 5:22 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.0 hours before the alert went out and 140 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: 2004 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 306 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

747 
WUUS53 KDLH 270202
SVRDLH
MNC061-137-270300-
/O.NEW.KDLH.SV.W.0039.210727T0202Z-210727T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Duluth MN
902 PM CDT Mon Jul 26 2021

The National Weather Service in Duluth MN has issued a

* Severe Thunderstorm Warning for...
  East central Itasca County in north central Minnesota...
  West central St. Louis County in northeastern Minnesota...

* Until 1000 PM CDT.

* At 902 PM CDT, a severe thunderstorm was located 7 miles southwest
  of Hibbing, moving southeast at 30 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Toivola around 930 PM CDT.

Other locations impacted by this severe thunderstorm include Swan
Lake, Hart Lake, Silica, Little Swan and Marble.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4734 9327 4741 9326 4745 9315 4731 9264
      4707 9288
TIME...MOT...LOC 0202Z 300DEG 26KT 4730 9302 

HAIL...1.25IN
WIND...60MPH
 
$$

Kossen

2 follow-up statements

083 
WWUS53 KDLH 270218
SVSDLH

Severe Weather Statement
National Weather Service Duluth MN
918 PM CDT Mon Jul 26 2021

MNC061-137-270300-
/O.CON.KDLH.SV.W.0039.000000T0000Z-210727T0300Z/
Itasca MN-St. Louis MN-
918 PM CDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHEASTERN ITASCA AND WEST CENTRAL ST. LOUIS COUNTIES...

At 917 PM CDT, a severe thunderstorm was located near Toivola, or 11
miles south of Hibbing, moving southeast at 30 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

This severe storm will be near...
  Toivola around 930 PM CDT.

Other locations impacted by this severe thunderstorm include Hart
Lake, Silica and Little Swan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4726 9316 4732 9306 4733 9299 4727 9268
      4707 9288
TIME...MOT...LOC 0217Z 300DEG 26KT 4724 9288 

HAIL...1.25IN
WIND...60MPH
 
$$

Kossen

041 
WWUS53 KDLH 270229
SVSDLH

Severe Weather Statement
National Weather Service Duluth MN
929 PM CDT Mon Jul 26 2021

MNC061-137-270238-
/O.CAN.KDLH.SV.W.0039.000000T0000Z-210727T0300Z/
Itasca MN-St. Louis MN-
929 PM CDT Mon Jul 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ITASCA AND WEST
CENTRAL ST. LOUIS COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
north central and northeastern Minnesota.

LAT...LON 4726 9316 4732 9306 4733 9299 4727 9268
      4707 9288
TIME...MOT...LOC 0228Z 300DEG 26KT 4720 9277 

$$

Kossen

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 7:13 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Itasca, Saint Louis	47 min
Jul 26, 7:14 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Itasca	16 min
Jul 26, 7:18 PM CDT	Special Weather Statement	DLH	Carlton	27 min
Jul 26, 7:29 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Itasca	31 min
Jul 26, 7:30 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Saint Louis	60 min
Jul 26, 7:34 PM CDT	Special Marine Warning	DLH		56 min
Jul 26, 7:47 PM CDT	Special Weather Statement	DLH	Itasca	28 min
Jul 26, 7:53 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Pine, Saint Louis	52 min
Jul 26, 8:11 PM CDT	Special Weather Statement	DLH	Itasca	34 min
Jul 26, 8:26 PM CDT	Special Marine Warning	DLH		49 min
Jul 26, 8:41 PM CDT	Special Weather Statement	DLH	Itasca	34 min
Jul 26, 8:49 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	26 min
Jul 26, 9:14 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca	31 min
Jul 26, 11:38 PM CDT	Special Marine Warning	DLH		35 min
Jul 27, 3:45 AM CDT	Special Weather Statement	DLH	Aitkin	15 min
Jul 27, 3:59 AM CDT	Special Weather Statement	DLH	Aitkin	16 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.