Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 61, NWS Twin Cities, MN

July 13, 2020Mille Lacs County, Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 13, 2020, 11:34 PM CDT for Mille Lacs County, Morrison County, Minnesota. It was in force for 41 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 13, 2020, 11:34 PM CDT (04:34 UTC)
Expired: Jul 14, 2020, 12:15 AM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Mille Lacs County, MN, Morrison County, MN

The radar

The Minneapolis radar (KMPX), 130 km from the middle of the area, began a volume at 04:38 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 13, 11:38 PM CDT	HAIL 1	1 Nw Pierz, 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, 4.6 hours before the alert went out and 129 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: 293 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 1483 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 309 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

190 
WUUS53 KMPX 140434
SVRMPX
MNC095-097-140515-
/O.NEW.KMPX.SV.W.0061.200714T0434Z-200714T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1134 PM CDT Mon Jul 13 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northern Mille Lacs County in east central Minnesota...
  Southeastern Morrison County in central Minnesota...

* Until 1215 AM CDT.

* At 1134 PM CDT, severe thunderstorms were located along a line
  extending from Lastrup to near Pierz to near Little Falls, moving
  east at 30 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.

* Severe thunderstorms will be near...
  Pierz and Lastrup around 1140 PM CDT.
  Onamia around 1210 AM CDT.

Other locations impacted by these severe thunderstorms include
Buckman, Hillman and Genola.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

&&

LAT...LON 4610 9348 4594 9372 4584 9398 4589 9445
      4596 9427 4608 9407
TIME...MOT...LOC 0434Z 270DEG 26KT 4604 9404 4596 9416 4591 9431 

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

BORGHOFF

2 follow-up statements

076 
WWUS53 KMPX 140445
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1145 PM CDT Mon Jul 13 2020

MNC095-097-140515-
/O.CON.KMPX.SV.W.0061.000000T0000Z-200714T0515Z/
Mille Lacs MN-Morrison MN-
1145 PM CDT Mon Jul 13 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR NORTHERN MILLE LACS AND SOUTHEASTERN MORRISON COUNTIES...

At 1145 PM CDT, severe thunderstorms were located along a line
extending from 6 miles east of Lastrup to near Pierz to 6 miles
northeast of Royalton, moving east at 30 mph.

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.

These severe storms will be near...
  Onamia around 1215 AM CDT.

Other locations impacted by these severe thunderstorms include
Buckman, Hillman and Genola.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

&&

LAT...LON 4610 9348 4594 9372 4584 9398 4588 9432
      4597 9415 4608 9396
TIME...MOT...LOC 0445Z 270DEG 26KT 4604 9394 4596 9406 4591 9421 

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

BORGHOFF

822 
WWUS53 KMPX 140500
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1200 AM CDT Tue Jul 14 2020

MNC095-097-140515-
/O.CON.KMPX.SV.W.0061.000000T0000Z-200714T0515Z/
Mille Lacs MN-Morrison MN-
1200 AM CDT Tue Jul 14 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR WEST CENTRAL MILLE LACS AND SOUTHEASTERN MORRISON COUNTIES...

At 1200 AM CDT, a severe thunderstorm was located 9 miles southwest
of Onamia, or 25 miles south of Mille Lacs Lake, moving east at 40
mph.

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

SOURCE...Trained weather spotters.

IMPACT...Expect damage to roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of west
central Mille Lacs and southeastern Morrison Counties, including the
following locations... Hillman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

&&

LAT...LON 4594 9372 4586 9393 4591 9406 4598 9397
      4603 9384 4603 9358
TIME...MOT...LOC 0500Z 268DEG 36KT 4595 9378 

TORNADO...POSSIBLE
HAIL...0.88IN
WIND...60MPH
 
$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 9:39 PM CDT	Special Weather Statement	MPX	Todd	51 min
Jul 13, 9:50 PM CDT	Severe Thunderstorm Warning	MPX	Todd	40 min
Jul 13, 10:26 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	52 min
Jul 14, 12:04 AM CDT	Tornado Warning	MPX	Kanabec, Mille Lacs	26 min
Jul 14, 6:16 AM CDT	Special Weather Statement	MPX	Faribault, Freeborn	44 min
Jul 14, 7:04 AM CDT	Special Weather Statement	MPX	Steele	41 min
Jul 14, 7:18 AM CDT	Special Weather Statement	MPX	Dakota	42 min
Jul 14, 7:22 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020 Every severe thunderstorm warning 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.