Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 40, NWS Twin Cities, MN

May 17, 2017Steele County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 17, 2017, 3:30 PM CDT for Steele County, Minnesota. It was in force for 30 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
May 17, 2017, 3:30 PM CDT (20:30 UTC)
Expired
May 17, 2017, 4:00 PM CDT
In force
30 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

County Steele County, MN

The radar

The Minneapolis radar (KMPX), 95 km from the middle of the area, began a volume at 20:29 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
May 17, 2:53 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 96 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 12:00Z on 2017-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2017-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
737 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
-70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

820 
WUUS53 KMPX 172030
SVRMPX
MNC147-172100-
/O.NEW.KMPX.SV.W.0040.170517T2030Z-170517T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
330 PM CDT WED MAY 17 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Eastern Steele County in south central Minnesota...

* Until 400 PM CDT

* At 330 PM CDT, a severe thunderstorm was located near Steele
  Center, or 10 miles south of Owatonna, moving north at 40 mph.

  HAZARD...60 mph wind gusts and half dollar 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,
  Owatonna around 350 PM CDT. 
  Medford around 355 PM CDT. 

Other locations impacted by this severe thunderstorm include Clinton
Falls, Steele Center, Merton, Owatonna Airport and Moland.

This includes the following highways...
 Interstate 35 between mile markers 28 and 49.
 U.S. Highway 14 between mile markers 170 and 179.

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 CDT for south central
Minnesota.

LAT...LON 4389 9333 4420 9331 4419 9305 4419 9304
      4386 9321
TIME...MOT...LOC 2030Z 193DEG 34KT 4394 9326 

HAIL...1.25IN
WIND...60MPH
 
$$

SPD
1 follow-up statement
091 
WWUS53 KMPX 172047
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
347 PM CDT WED MAY 17 2017

MNC147-172100-
/O.CON.KMPX.SV.W.0040.000000T0000Z-170517T2100Z/
Steele MN-
347 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR NORTHEASTERN STEELE COUNTY...

At 347 PM CDT, a severe thunderstorm was located over Owatonna,
moving north at 40 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

this severe thunderstorm will remain over mainly rural areas of
northeastern Steele County, including the following locations:
Clinton Falls, Merton, Owatonna Airport and Moland.

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 CDT for south central
Minnesota.

LAT...LON 4402 9331 4420 9331 4419 9305 4419 9304
      4397 9315
TIME...MOT...LOC 2047Z 193DEG 34KT 4410 9321 

HAIL...1.25IN
WIND...60MPH
 
$$

SPD

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 9:42 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn48 min
May 17, 2:34 PM CDTSpecial Weather StatementMPXFreeborn26 min
May 17, 2:44 PM CDTSevere Thunderstorm WarningMPXFreeborn31 min
May 17, 2:56 PM CDTSevere Thunderstorm WarningMPXFreeborn34 min
May 17, 3:03 PM CDTSpecial Weather StatementMPXMartin, Watonwan42 min
May 17, 3:08 PM CDTSevere Thunderstorm WarningMPXFreeborn, Steele24 min
May 17, 3:10 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault35 min
May 17, 3:23 PM CDTSpecial Weather StatementMPXMartin22 min
May 17, 3:42 PM CDTTornado WarningMPXBlue Earth33 min
May 17, 3:55 PM CDTTornado WarningMPXSteele21 min
May 17, 4:00 PM CDTSevere Thunderstorm WarningMPXRice, Steele30 min
May 17, 4:03 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet27 min
May 17, 4:11 PM CDTTornado WarningMPXBlue Earth, Nicollet19 min
May 17, 5:00 PM CDTSpecial Weather StatementMPXNicollet30 min
May 17, 5:01 PM CDTFlash Flood WarningMPXBlue Earth, Le Sueur, Nicollet119 min
May 17, 5:13 PM CDTSpecial Weather StatementMPXAnoka32 min
May 17, 5:45 PM CDTSpecial Weather StatementMPXCarver30 min
May 17, 5:50 PM CDTSpecial Weather StatementMPXChisago25 min
May 17, 6:04 PM CDTSpecial Weather StatementMPXHennepin, Rice, Scott, Wright56 min
May 17, 6:08 PM CDTSpecial Weather StatementMPXMartin37 min
May 17, 6:11 PM CDTSpecial Weather StatementMPXChisago64 min
May 17, 6:45 PM CDTSpecial Weather StatementMPXSherburne60 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.