Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 17, NWS Twin Cities, MN

July 18, 2020Anoka County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 18, 2020, 5:48 PM CDT for Anoka County, Minnesota. It was in force for 42 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: Jul 18, 2020, 5:48 PM CDT (22:48 UTC)
Expired: Jul 18, 2020, 6:30 PM CDT
In force: 42 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.0 in

County Anoka County, MN

The radar

The Minneapolis radar (KMPX), 50 km from the middle of the area, began a volume at 22:50 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
Jul 18, 5:50 PM CDT	HAIL 1	Ham Lake, MN	VIDEO ON TWITTER.
Jul 18, 5:55 PM CDT	TSTM WND DMG	1 Ese Coon Rapids, MN	A LARGE TREE WERE BLOWN DOWN NEAR THE INTERSECTION OF 99TH AVE NE, AND CLOVERLEAF PARK.
Jul 18, 6:00 PM CDT	HAIL 1	2 Ne Blaine, MN	PICTURE ON FACEBOOK.
Jul 18, 6:10 PM CDT	HAIL 0.88	3 W Forest Lake, MN	PICTURE ON TWITTER.
Jul 18, 6:18 PM CDT	HAIL 1	4 Sw Forest Lake, MN

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 18, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.8 hours before the alert went out and 51 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: 2513 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 356 m²/s²
0-3 km storm-relative helicity: 389 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

891 
WFUS53 KMPX 182248
TORMPX
MNC003-182330-
/O.NEW.KMPX.TO.W.0017.200718T2248Z-200718T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
548 PM CDT Sat Jul 18 2020

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Northern Anoka County in east central Minnesota...

* Until 630 PM CDT.
    
* At 547 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Coon Rapids, or 16 miles north of Minneapolis,
  moving east at 25 mph.

  HAZARD...Tornado and hail up to two inches in diameter.

  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...
  Ham Lake around 555 PM CDT.
  Blaine and Lino Lakes around 605 PM CDT.

Other locations impacted by this tornadic thunderstorm include Blaine
Airport, Lexington, Centerville and Circle Pines.

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 4515 9302 4513 9330 4516 9334 4523 9341
      4541 9302
TIME...MOT...LOC 2247Z 250DEG 22KT 4520 9328 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

BORGHOFF

4 follow-up statements

452 
WWUS53 KMPX 182255
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
555 PM CDT Sat Jul 18 2020

MNC003-182330-
/O.CON.KMPX.TO.W.0017.000000T0000Z-200718T2330Z/
Anoka MN-
555 PM CDT Sat Jul 18 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHEASTERN ANOKA COUNTY...
        
At 555 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Blaine, or 15 miles north of Minneapolis, moving
east at 25 mph.

HAZARD...Tornado and two inch hail.

SOURCE...Weather spotters reported a rotating wall cloud.

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...
  Lino Lakes around 605 PM CDT.

Other locations impacted by this tornadic thunderstorm include Blaine
Airport, Lexington, Centerville and Circle Pines.

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 4515 9302 4513 9330 4516 9334 4520 9338
      4541 9302
TIME...MOT...LOC 2255Z 260DEG 22KT 4519 9321 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

CEO

248 
WWUS53 KMPX 182306
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
606 PM CDT Sat Jul 18 2020

MNC003-182330-
/O.CON.KMPX.TO.W.0017.000000T0000Z-200718T2330Z/
Anoka MN-
606 PM CDT Sat Jul 18 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR EAST
CENTRAL ANOKA COUNTY...
        
At 606 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Lino Lakes, or 18 miles north of Minneapolis, moving
east at 25 mph.

HAZARD...Tornado and two inch hail.

SOURCE...Weather spotters reported a rotating wall cloud.

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
east central Anoka County, including the following locations...
Lexington, Centerville and Circle Pines.

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 4514 9319 4522 9322 4541 9302 4515 9302
TIME...MOT...LOC 2306Z 250DEG 22KT 4521 9312 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

CEO

752 
WWUS53 KMPX 182320
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
620 PM CDT Sat Jul 18 2020

MNC003-182330-
/O.CON.KMPX.TO.W.0017.000000T0000Z-200718T2330Z/
Anoka MN-
620 PM CDT Sat Jul 18 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR EAST
CENTRAL ANOKA COUNTY...
        
At 619 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Forest Lake, or 21 miles north of St. Paul, moving
east at 25 mph.

HAZARD...Tornado and two inch hail.

SOURCE...Weather spotters reported a rotating wall cloud.

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.

Locations impacted include...
Blaine, Lino Lakes, Ham Lake, Circle Pines, Centerville and
Lexington.

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 4514 9319 4522 9322 4530 9302 4515 9302
TIME...MOT...LOC 2319Z 250DEG 22KT 4524 9301 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

CEO

131 
WWUS53 KMPX 182329
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
629 PM CDT Sat Jul 18 2020

MNC003-182339-
/O.EXP.KMPX.TO.W.0017.000000T0000Z-200718T2330Z/
Anoka MN-
629 PM CDT Sat Jul 18 2020

...THE TORNADO WARNING FOR EAST CENTRAL ANOKA COUNTY WILL EXPIRE AT
630 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
east central Minnesota.

LAT...LON 4514 9319 4522 9322 4530 9302 4515 9302
TIME...MOT...LOC 2329Z 250DEG 22KT 4526 9294 

$$

CEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 9:08 PM CDT	Special Weather Statement	MPX	Douglas	67 min
Jul 17, 9:22 PM CDT	Severe Thunderstorm Warning	MPX	Todd	53 min
Jul 17, 10:13 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	62 min
Jul 17, 10:16 PM CDT	Tornado Warning	MPX	Morrison, Todd	44 min
Jul 17, 10:20 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	55 min
Jul 17, 10:54 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stevens	66 min
Jul 17, 10:58 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison, Stearns, Todd	77 min
Jul 17, 11:51 PM CDT	Tornado Warning	MPX	Pope, Stearns, Swift	28 min
Jul 17, 11:58 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Kandiyohi, Morrison, Stearns	77 min
Jul 18, 12:13 AM CDT	Special Weather Statement	MPX	Kanabec, Mille Lacs	62 min
Jul 18, 12:26 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Meeker, Mille Lacs, Sherburne, Stearns and 1 more	49 min
Jul 18, 12:32 AM CDT	Special Weather Statement	MPX	Lac qui Parle, Swift	43 min
Jul 18, 12:44 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Renville, Swift, Yellow Medicine	61 min
Jul 18, 1:03 AM CDT	Tornado Warning	MPX	Chisago, Isanti, Kanabec	27 min
Jul 18, 1:16 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	44 min
Jul 18, 1:19 AM CDT	Special Weather Statement	MPX	Anoka, Chisago, Hennepin, Isanti, Wright	56 min
Jul 18, 1:38 AM CDT	Special Weather Statement	MPX	McLeod, Meeker, Redwood, Renville	52 min
Jul 18, 3:03 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Hennepin, Scott, Washington	42 min
Jul 18, 3:43 AM CDT	Special Weather Statement	MPX	Goodhue, Rice	32 min
Jul 18, 4:06 AM CDT	Special Weather Statement	MPX	Watonwan	39 min
Jul 18, 5:09 AM CDT	Special Weather Statement	MPX	Freeborn, Steele, Waseca	66 min
Jul 18, 5:00 PM CDT	Special Weather Statement	MPX	Anoka	30 min
Jul 18, 5:23 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	52 min
Jul 18, 6:07 PM CDT	Tornado Warning	MPX	Washington	38 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.