Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 12, NWS Twin Cities, MN

March 6, 2017Goodhue County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 6, 2017, 6:31 PM CST for Goodhue County, Minnesota. It was in force for 29 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
Mar 6, 2017, 6:31 PM CST (00:31 UTC)
Expired
Mar 6, 2017, 7:00 PM CST
In force
29 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

County Goodhue County, MN

The radar

The Minneapolis radar (KMPX), 99 km from the middle of the area, began a volume at 00:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 6, 2:43 PM CSTTornado WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 102 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2017-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 923 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2017-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 432 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
923 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
993 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
432 m²/s²
0-3 km storm-relative helicity
528 m²/s²
Significant tornado parameter
2.2
Supercell composite
10.3

Open this sounding in Storm Lab

The text

As transmitted.

596 
WUUS53 KMPX 070031
SVRMPX
MNC049-070100-
/O.NEW.KMPX.SV.W.0012.170307T0031Z-170307T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
631 PM CST MON MAR 6 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Goodhue County in southeastern Minnesota...

* Until 700 PM CST

* At 631 PM CST, a severe thunderstorm was located over Mazeppa, or
  15 miles northeast of Mantorville, moving northeast at 70 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,
  Frontenac around 650 PM CST. 

Other locations impacted by this severe thunderstorm include
Frontenac State Park, Bellechester, Central Point and Wacouta.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 1000 PM CST for southeastern
Minnesota...and west central Wisconsin.

LAT...LON 4424 9278 4456 9242 4456 9234 4454 9231
      4450 9230 4446 9224 4445 9243 4437 9243
      4436 9255 4420 9256 4420 9272
TIME...MOT...LOC 0031Z 221DEG 62KT 4426 9260 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
932 
WWUS53 KMPX 070058
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
658 PM CST MON MAR 6 2017

MNC049-070108-
/O.EXP.KMPX.SV.W.0012.000000T0000Z-170307T0100Z/
Goodhue MN-
658 PM CST MON MAR 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GOODHUE COUNTY
WILL EXPIRE AT 700 PM CST...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A tornado watch remains in effect until 1000 PM CST for southeastern
Minnesota...and west central Wisconsin.

LAT...LON 4424 9278 4456 9242 4456 9234 4454 9231
      4450 9230 4446 9224 4445 9243 4437 9243
      4436 9255 4420 9256 4420 9272
TIME...MOT...LOC 0058Z 221DEG 62KT 4458 9221 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 6:10 PM CSTSevere Thunderstorm WarningMPXChisago, Isanti, Kanabec35 min
Mar 6, 6:13 PM CSTSevere Thunderstorm WarningMPXGoodhue, Rice47 min
Mar 6, 6:48 PM CSTSevere Thunderstorm WarningMPXGoodhue42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017Every severe thunderstorm warning in 2017

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.