Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Twin Cities, MN

April 5, 2021Anoka County, Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 5, 2021, 10:59 PM CDT for Anoka County, Hennepin County, Wright County, Minnesota. It was in force for 46 min. 5 reports 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: Apr 5, 2021, 10:59 PM CDT (03:59 UTC)
Expired: Apr 5, 2021, 11:45 PM CDT
In force: 46 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Anoka County, MN, Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 43 km from the middle of the area, began a volume at 03:59 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.

What was reported inside it

Time	Report	Where	Remark
Apr 5, 11:01 PM CDT	HAIL 1	Rockford, MN
Apr 5, 11:19 PM CDT	HAIL 1	1 W Hanover, MN
Apr 5, 11:19 PM CDT	HAIL 1	3 Wsw Hanover, MN
Apr 5, 11:23 PM CDT	HAIL 1.25	4 Ese Buffalo, MN	PHONED IN REPORT.
Apr 5, 11:25 PM CDT	HAIL 1	Corcoran, MN

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.0 hours before the alert went out and 43 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: 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.

922 
WUUS53 KMPX 060359
SVRMPX
MNC003-053-171-060445-
/O.NEW.KMPX.SV.W.0011.210406T0359Z-210406T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1059 PM CDT Mon Apr 5 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wright County in central Minnesota...
  Northern Hennepin County in east central Minnesota...
  Western Anoka County in east central Minnesota...

* Until 1145 PM CDT.

* At 1059 PM CDT, a severe thunderstorm was located near Buffalo,
  moving east at 40 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 be near...
  Rockford around 1105 PM CDT.
  Independence around 1110 PM CDT.
  Albertville and Corcoran around 1120 PM CDT.
  Maple Grove, St. Michael, Otsego and Rogers around 1125 PM CDT.
  Brooklyn Park, Ramsey, Champlin and Anoka around 1135 PM CDT.
  Coon Rapids and Andover around 1140 PM CDT.
  Blaine around 1145 PM CDT.

Other locations impacted by this severe thunderstorm include Nowthen,
Hanover, Greenfield, Buffalo Airport, Osseo, Dayton and Oak Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4536 9339 4513 9321 4504 9390 4515 9398
      4530 9357 4524 9352 4531 9351
TIME...MOT...LOC 0359Z 253DEG 35KT 4513 9386 

HAIL...1.00IN
WIND...60MPH
 
$$

TDH

3 follow-up statements

787 
WWUS53 KMPX 060413
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1113 PM CDT Mon Apr 5 2021

MNC003-053-171-060445-
/O.CON.KMPX.SV.W.0011.000000T0000Z-210406T0445Z/
Wright MN-Hennepin MN-Anoka MN-
1113 PM CDT Mon Apr 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR EAST CENTRAL WRIGHT...NORTHERN HENNEPIN AND WESTERN ANOKA
COUNTIES...

At 1113 PM CDT, a severe thunderstorm was located over St. Michael, 
or 10 miles east of Buffalo, moving east at 40 mph. Trained spotters 
reported 1 inch hail in Rockford at 1110 PM.

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

SOURCE...Trained weather spotters.

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

This severe storm will be near...
  Rogers around 1120 PM CDT.
  Maple Grove around 1125 PM CDT.
  Ramsey and Champlin around 1130 PM CDT.
  Brooklyn Park, Andover and Anoka around 1135 PM CDT.
  Coon Rapids, Fridley and Spring Lake Park around 1140 PM CDT.
  Blaine around 1150 PM CDT.

Other locations impacted by this severe thunderstorm include Nowthen,
Hanover, Greenfield, Buffalo Airport, Osseo, Dayton and Oak Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4536 9339 4513 9321 4506 9373 4516 9385
      4530 9357 4524 9352 4531 9351
TIME...MOT...LOC 0413Z 253DEG 34KT 4516 9366 

HAIL...1.00IN
WIND...60MPH
 
$$

TDH

248 
WWUS53 KMPX 060428
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1128 PM CDT Mon Apr 5 2021

MNC003-053-171-060445-
/O.CON.KMPX.SV.W.0011.000000T0000Z-210406T0445Z/
Wright MN-Hennepin MN-Anoka MN-
1128 PM CDT Mon Apr 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR EAST CENTRAL WRIGHT...NORTHERN HENNEPIN AND SOUTHWESTERN ANOKA
COUNTIES...

At 1127 PM CDT, a severe thunderstorm was located over St. Anthony, 
or 18 miles northwest of Minneapolis, moving east at 40 mph.

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

SOURCE...Trained weather spotters.

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

This severe storm will be near...
  Brooklyn Park and Anoka around 1135 PM CDT.
  Coon Rapids, Andover, Fridley and Spring Lake Park around 1140 PM 
  CDT.
  Blaine around 1155 PM CDT.

Other locations impacted by this severe thunderstorm include Hanover,
Dayton, Osseo, Oak Grove and Greenfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4508 9358 4517 9371 4525 9359 4526 9354
      4524 9352 4527 9352 4528 9347 4532 9336
      4513 9321
TIME...MOT...LOC 0427Z 255DEG 34KT 4518 9348 

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

TDH

618 
WWUS53 KMPX 060443
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1143 PM CDT Mon Apr 5 2021

MNC003-053-171-060453-
/O.EXP.KMPX.SV.W.0011.000000T0000Z-210406T0445Z/
Wright MN-Hennepin MN-Anoka MN-
1143 PM CDT Mon Apr 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WRIGHT...NORTHERN
HENNEPIN AND SOUTHWESTERN ANOKA COUNTIES WILL EXPIRE AT 1145 PM
CDT...
                
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 will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 4508 9358 4517 9371 4525 9359 4526 9354
      4524 9352 4527 9352 4528 9347 4532 9336
      4513 9321
TIME...MOT...LOC 0443Z 253DEG 35KT 4522 9331 

$$

TDH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 7:37 PM CDT	Special Weather Statement	MPX	Renville	38 min
Apr 5, 7:40 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	50 min
Apr 5, 8:19 PM CDT	Special Weather Statement	MPX	Kandiyohi, Meeker	41 min
Apr 5, 8:26 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti, Sherburne, Wright	49 min
Apr 5, 8:59 PM CDT	Special Weather Statement	MPX	Redwood	46 min
Apr 5, 9:00 PM CDT	Special Weather Statement	MPX	Meeker	45 min
Apr 5, 9:10 PM CDT	Special Weather Statement	MPX	Sherburne	35 min
Apr 5, 9:16 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Stearns, Wright	29 min
Apr 5, 9:20 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker	25 min
Apr 5, 9:30 PM CDT	Special Weather Statement	MPX	Renville	30 min
Apr 5, 9:45 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	45 min
Apr 5, 9:48 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs	31 min
Apr 5, 9:54 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Meeker, Wright	36 min
Apr 5, 10:07 PM CDT	Special Weather Statement	MPX	Kanabec	8 min
Apr 5, 10:10 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	20 min
Apr 5, 10:27 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, McLeod, Wright	33 min
Apr 5, 10:34 PM CDT	Special Weather Statement	MPX	Kanabec	26 min
Apr 5, 10:37 PM CDT	Special Weather Statement	MPX	Wright	23 min
Apr 5, 11:03 PM CDT	Special Weather Statement	MPX	Hennepin, Ramsey, Scott	42 min
Apr 5, 11:36 PM CDT	Special Weather Statement	MPX	Anoka	39 min
Apr 5, 11:45 PM CDT	Special Weather Statement	MPX	Anoka	45 min
Apr 5, 11:49 PM CDT	Special Weather Statement	MPX	Dakota, Washington	41 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; radar from the NEXRAD Level II archive.