Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 45, NWS Twin Cities, MN

August 14, 2020Anoka County, Hennepin County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Aug 14, 2020, 7:56 PM CDT for Anoka County, Hennepin County, Minnesota. It was in force for 9 min. 3 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: Aug 14, 2020, 7:56 PM CDT (00:56 UTC)
Expired: Aug 14, 2020, 8:05 PM CDT
In force: 9 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Anoka County, MN, Hennepin County, MN

The radar

The Minneapolis radar (KMPX), 34 km from the middle of the area, began a volume at 00:58 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
Aug 14, 8:00 PM CDT	TSTM WND DMG	1 E Robbinsdale, MN	NUMEROUS 8 TO 10 INCH BRANCHES DOWN OVER SEVERAL BLOCKS JUST WEST OF 41ST AND PENN AVENUE IN NORTH MINNEAPOLIS.
Aug 14, 8:05 PM CDT	TSTM WND DMG	1 Ese Robbinsdale, MN	SEVERAL LARGE TREES DOWN.
Aug 14, 8:05 PM CDT	TSTM WND DMG	2 Se Robbinsdale, MN	8 INCH TREE DOWN, TIME ESTIMATED FROM RADAR.

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
Aug 14, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.9 hours before the alert went out and 389 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: 1019 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 247 m²/s²
0-3 km storm-relative helicity: 426 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

889 
WFUS53 KMPX 150056
TORMPX
MNC003-053-150130-
/O.NEW.KMPX.TO.W.0045.200815T0056Z-200815T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
756 PM CDT Fri Aug 14 2020

The National Weather Service in the Twin Cities has issued a

* Tornado Warning for...
  East central Hennepin County in east central Minnesota...
  South central Anoka County in east central Minnesota...

* Until 830 PM CDT.
    
* At 755 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Golden Valley, or near Minneapolis, moving east at
  40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur. Tree 
           damage is likely.

* This dangerous storm will be near...
  Fridley, Columbia Heights and Spring Lake Park around 805 PM CDT.
  Roseville, New Brighton and Mounds View around 810 PM CDT.
  Blaine around 815 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Medicine Lake, Robbinsdale, Crystal Airport, North Minneapolis,
Hilltop, New Hope and Crystal.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4512 9322 4504 9323 4503 9320 4501 9321
      4499 9342 4504 9345 4519 9323
TIME...MOT...LOC 0055Z 248DEG 35KT 4503 9335 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JRB

3 follow-up statements

599 
WWUS53 KMPX 150100
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
800 PM CDT Fri Aug 14 2020

MNC003-053-150130-
/O.CON.KMPX.TO.W.0045.000000T0000Z-200815T0130Z/
Hennepin MN-Anoka MN-
800 PM CDT Fri Aug 14 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR EAST
CENTRAL HENNEPIN AND SOUTH CENTRAL ANOKA COUNTIES...
    
At 800 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Columbia Heights, or near Minneapolis, moving east
at 40 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur. Tree damage is 
         likely.

This dangerous storm will be near...
  Roseville and Mounds View around 805 PM CDT.
  New Brighton around 810 PM CDT.
  Blaine around 815 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Robbinsdale, North Minneapolis, Hilltop, Crystal and New Hope.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4512 9322 4504 9323 4503 9320 4501 9321
      4500 9336 4506 9338 4519 9323
TIME...MOT...LOC 0100Z 248DEG 35KT 4505 9328 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JRB

096 
WWUS53 KMPX 150103
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
803 PM CDT Fri Aug 14 2020

MNC003-053-150130-
/O.CON.KMPX.TO.W.0045.000000T0000Z-200815T0130Z/
Hennepin MN-Anoka MN-
803 PM CDT Fri Aug 14 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR EASTERN
HENNEPIN AND SOUTH CENTRAL ANOKA COUNTIES...
    
At 803 PM CDT, a severe thunderstorm capable of producing a tornado
was located over New Brighton, or 7 miles north of Minneapolis,
moving east at 40 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur. Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
eastern Hennepin and south central Anoka Counties, including the
following locations... North Minneapolis and Hilltop.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4512 9322 4504 9323 4503 9320 4501 9321
      4501 9331 4506 9331 4513 9322
TIME...MOT...LOC 0103Z 247DEG 36KT 4507 9321 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JRB

193 
WWUS53 KMPX 150105
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
805 PM CDT Fri Aug 14 2020

MNC003-053-150115-
/O.CAN.KMPX.TO.W.0045.000000T0000Z-200815T0130Z/
Hennepin MN-Anoka MN-
805 PM CDT Fri Aug 14 2020

...THE TORNADO WARNING FOR EASTERN HENNEPIN AND SOUTH CENTRAL ANOKA
COUNTIES IS CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.  However
gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
east central Minnesota.

LAT...LON 4512 9322 4504 9323 4503 9320 4501 9321
      4501 9331 4506 9331 4513 9322
TIME...MOT...LOC 0101Z 248DEG 35KT 4508 9318 

$$

JRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 7:01 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Wright	29 min
Aug 14, 7:11 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Nicollet, Scott, Sibley	34 min
Aug 14, 7:14 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Wright	31 min
Aug 14, 7:33 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin	27 min
Aug 14, 7:50 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Ramsey	55 min
Aug 14, 8:12 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Le Sueur, Rice, Scott	33 min
Aug 14, 8:13 PM CDT	Severe Thunderstorm Warning	MPX	Washington	47 min
Aug 14, 8:16 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Washington	44 min
Aug 14, 8:25 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	50 min
Aug 14, 9:01 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	44 min
Aug 14, 9:17 PM CDT	Special Weather Statement	MPX	Goodhue	43 min

Nearby

Tornado Warnings in Minnesota, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.