Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 38, NWS Twin Cities, MN

July 9, 2020Dakota County, Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 9, 2020, 4:58 AM CDT for Dakota County, Scott County, Minnesota. It was in force for 14 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 9, 2020, 4:58 AM CDT (09:58 UTC)
Expired: Jul 9, 2020, 5:12 AM CDT
In force: 14 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dakota County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 29 km from the middle of the area, began a volume at 10:02 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.0 hours before the alert went out and 31 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: 2332 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

027 
WUUS53 KMPX 090958
SVRMPX
MNC037-139-091030-
/O.NEW.KMPX.SV.W.0038.200709T0958Z-200709T1030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
458 AM CDT Thu Jul 9 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southwestern Dakota County in east central Minnesota...
  Southeastern Scott County in east central Minnesota...

* Until 530 AM CDT.

* At 457 AM CDT, a severe thunderstorm was located near New Prague,
  or 18 miles northwest of Northfield, moving northeast 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.

* Locations impacted include...
  Burnsville, Lakeville, Savage, Prior Lake, Farmington, New Prague,
  Elko New Market, Credit River, Helena and Lakeville Airport.

This includes Interstate 35 between mile markers 76 and 80.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4459 9359 4478 9329 4457 9313 4454 9345
      4455 9356 4455 9357
TIME...MOT...LOC 0957Z 242DEG 34KT 4459 9350 

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

TDH

1 follow-up statement

402 
WWUS53 KMPX 091012
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
512 AM CDT Thu Jul 9 2020

MNC037-139-091022-
/O.CAN.KMPX.SV.W.0038.000000T0000Z-200709T1030Z/
Dakota MN-Scott MN-
512 AM CDT Thu Jul 9 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN DAKOTA AND
SOUTHEASTERN SCOTT 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.  However small hail and
gusty winds are still possible with this thunderstorm.

LAT...LON 4459 9359 4478 9329 4457 9313 4454 9345
      4455 9356 4455 9357
TIME...MOT...LOC 1009Z 242DEG 34KT 4466 9332 

$$

TDH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 7:15 PM CDT	Special Weather Statement	MPX	Todd	30 min
Jul 8, 7:33 PM CDT	Special Weather Statement	MPX	Todd	27 min
Jul 8, 7:44 PM CDT	Special Weather Statement	MPX	Todd	31 min
Jul 8, 8:24 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	24 min
Jul 8, 8:35 PM CDT	Special Weather Statement	MPX	Kanabec	25 min
Jul 8, 9:28 PM CDT	Special Weather Statement	MPX	Kanabec	32 min
Jul 9, 12:57 AM CDT	Special Weather Statement	MPX	Swift	48 min
Jul 9, 1:56 AM CDT	Special Weather Statement	MPX	Stearns	49 min
Jul 9, 2:44 AM CDT	Special Weather Statement	MPX	Mille Lacs, Morrison	46 min
Jul 9, 3:55 AM CDT	Special Weather Statement	MPX	Carver	35 min
Jul 9, 4:05 AM CDT	Special Weather Statement	MPX	Isanti	25 min
Jul 9, 4:12 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott, Sibley	33 min
Jul 9, 4:36 AM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Scott	24 min
Jul 9, 4:39 AM CDT	Special Weather Statement	MPX	Chisago	51 min
Jul 9, 4:47 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Watonwan	23 min
Jul 9, 4:49 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Ramsey, Washington	26 min
Jul 9, 5:18 AM CDT	Special Weather Statement	MPX	Rice	27 min
Jul 9, 5:20 AM CDT	Special Weather Statement	MPX	Washington	25 min
Jul 9, 5:38 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	24 min
Jul 9, 7:44 AM CDT	Special Weather Statement	MPX	Steele	16 min
Jul 9, 9:55 AM CDT	Special Weather Statement	MPX	Steele	35 min
Jul 9, 11:45 AM CDT	Special Weather Statement	MPX	Freeborn	30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.