Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 143, NWS Twin Cities, MN

July 11, 2017Douglas County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 11, 2017, 11:14 PM CDT for Douglas County, Minnesota. It was in force for 46 min. 2 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 11, 2017, 11:14 PM CDT (04:14 UTC)
Expired
Jul 12, 2017, 12:00 AM CDT
In force
46 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 183 km from the middle of the area, began a volume at 04:14 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

TimeReportWhereRemark
Jul 11, 11:51 PM CDTHAIL 0.751 S Brandon, MNAT I-94 EXIT TO BRANDON.
Jul 11, 11:52 PM CDTTSTM WND GST 681 Ssw Alexandria, MNMEASURED 61KT GUST. NUMEROUS TREES DOWN IN ALEXANDRIA PER LAW ENFORCEMENT.

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.

IssuedProductOfficeLasted
Jul 11, 6:52 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 11, 10:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.2 hours before the alert went out and 181 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 2017-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 913 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2017-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 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
913 J/kg
Mixed-layer CIN
-179 J/kg
Mixed-layer LCL
1279 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.1
Supercell composite
4.0

Open this sounding in Storm Lab

The text

As transmitted.

864 
WUUS53 KMPX 120414
SVRMPX
MNC041-120500-
/O.NEW.KMPX.SV.W.0143.170712T0414Z-170712T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1114 PM CDT TUE JUL 11 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Douglas County in west central Minnesota...

* Until midnight CDT

* At 1114 PM CDT, a severe thunderstorm was located over Brandon, or
  11 miles northwest of Alexandria, moving east at 35 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,
  Alexandria and Carlos around 1135 PM CDT. 

Other locations impacted by this severe thunderstorm include
Alexandria Airport, Nelson, Forada, Holmes City, Belle River and
Garfield.

This includes Interstate 94 in Minnesota between mile markers 86 and
115.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4601 9515 4576 9514 4576 9528 4588 9576
      4605 9563
TIME...MOT...LOC 0414Z 286DEG 33KT 4597 9557 

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

BORGHOFF
2 follow-up statements
066 
WWUS53 KMPX 120424
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1124 PM CDT TUE JUL 11 2017

MNC041-120500-
/O.CON.KMPX.SV.W.0143.000000T0000Z-170712T0500Z/
Douglas MN-
1124 PM CDT TUE JUL 11 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR CENTRAL DOUGLAS COUNTY...

At 1124 PM CDT, a severe thunderstorm was located over Garfield, or
near Alexandria, moving southeast at 35 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 storm will be near...
  Carlos around 1135 PM CDT. 
  Alexandria around 1140 PM CDT. 

Other locations impacted by this severe thunderstorm include
Alexandria Airport, Nelson, Forada, Holmes City, Belle River and
Garfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4601 9515 4576 9514 4576 9528 4588 9576
      4605 9563
TIME...MOT...LOC 0424Z 297DEG 30KT 4592 9547 

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

BORGHOFF
380 
WWUS53 KMPX 120447
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1147 PM CDT TUE JUL 11 2017

MNC041-120500-
/O.CON.KMPX.SV.W.0143.000000T0000Z-170712T0500Z/
Douglas MN-
1147 PM CDT TUE JUL 11 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR CENTRAL DOUGLAS COUNTY...

At 1146 PM CDT, a severe thunderstorm was located near Brandon, or 13
miles west of Alexandria, moving east at 35 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 storm will be near...
  Brandon around 1150 PM CDT. 
  Alexandria around 1200 AM CDT. 

Other locations impacted by this severe thunderstorm include
Alexandria Airport, Nelson, Forada, Holmes City, Belle River and
Garfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4601 9515 4576 9514 4576 9528 4588 9576
      4605 9563
TIME...MOT...LOC 0446Z 278DEG 32KT 4591 9565 

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

BORGHOFF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 11:02 PM CDTSpecial Weather StatementMPXSwift28 min
Jul 11, 11:27 PM CDTSevere Thunderstorm WarningMPXPope33 min
Jul 11, 11:59 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Todd46 min
Jul 12, 12:10 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison35 min
Jul 12, 12:45 AM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Todd21 min
Jul 12, 12:46 AM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs44 min
Jul 12, 1:44 AM CDTSevere Thunderstorm WarningMPXAnoka, Benton, Isanti, Mille Lacs, Sherburne46 min
Jul 12, 2:27 AM CDTSpecial Weather StatementMPXAnoka, Ramsey, Washington33 min
Jul 12, 2:48 AM CDTSevere Thunderstorm WarningMPXDakota, Ramsey, Washington27 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.