Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 125, NWS Twin Cities, MN

July 9, 20174 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 9, 2017, 9:16 PM CDT for 4 counties in Minnesota. It was in force for 44 min. 3 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 9, 2017, 9:16 PM CDT (02:16 UTC)
Expired
Jul 9, 2017, 10:00 PM CDT
In force
44 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Dakota County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 53 km from the middle of the area, began a volume at 02:20 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 9, 9:20 PM CDTHAIL 12 Ese Apple Valley, MN
Jul 9, 9:25 PM CDTHAIL 13 Nnw Mendota Heights, MN
Jul 9, 9:32 PM CDTHAIL 11 N West St. Paul, MN

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 9, 7:05 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.3 hours before the alert went out and 56 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 2017-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 627 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 2017-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 222 square meters per square second.19395878Sfc1 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
627 J/kg
Mixed-layer CIN
-187 J/kg
Mixed-layer LCL
1764 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
222 m²/s²
0-3 km storm-relative helicity
278 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.6

Open this sounding in Storm Lab

The text

As transmitted.

868 
WUUS53 KMPX 100216
SVRMPX
MNC037-053-123-163-100300-
/O.NEW.KMPX.SV.W.0125.170710T0216Z-170710T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
916 PM CDT SUN JUL 9 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Eastern Hennepin County in east central Minnesota...
  Dakota County in east central Minnesota...
  Southern Washington County in east central Minnesota...
  Southern Ramsey County in east central Minnesota...

* Until 1000 PM CDT

* At 915 PM CDT, severe thunderstorms were located along a line
  extending from near South Minneapolis to Rosemount to near
  Farmington, 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. 

* Severe thunderstorms will be near,
  Rosemount around 920 PM CDT. 
  Inver Grove Heights, South St. Paul and West St. Paul around 930 
  PM CDT. 
  Cottage Grove, Hastings and St. Paul Park around 940 PM CDT. 
  Woodbury around 945 PM CDT. 

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 100 AM CDT for southeastern
and east central Minnesota.

LAT...LON 4458 9325 4474 9319 4493 9330 4495 9276
      4491 9276 4490 9278 4482 9277 4475 9281
      4470 9273 4463 9273 4463 9279 4454 9280
      4454 9292
TIME...MOT...LOC 0215Z 278DEG 26KT 4492 9322 4474 9310 4465 9314 

HAIL...1.00IN
WIND...60MPH
 
$$
2 follow-up statements
060 
WWUS53 KMPX 100234
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
934 PM CDT SUN JUL 9 2017

MNC053-100243-
/O.CAN.KMPX.SV.W.0125.000000T0000Z-170710T0300Z/
Hennepin MN-
934 PM CDT SUN JUL 9 2017

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN HENNEPIN COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 100 AM CDT for southeastern
and east central Minnesota.

LAT...LON 4455 9304 4472 9307 4494 9315 4495 9276
      4491 9276 4490 9278 4482 9277 4475 9281
      4470 9273 4463 9273 4463 9279 4454 9280
      4454 9292
TIME...MOT...LOC 0233Z 278DEG 26KT 4490 9306 4472 9294 4463 9298 

$$

MNC037-123-163-100300-
/O.CON.KMPX.SV.W.0125.000000T0000Z-170710T0300Z/
Dakota MN-Washington MN-Ramsey MN-
934 PM CDT SUN JUL 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR EASTERN DAKOTA...SOUTHERN WASHINGTON AND SOUTHEASTERN RAMSEY
COUNTIES...

At 933 PM CDT, severe thunderstorms were located along a line
extending from South St Paul to near Vermillion to near Hampton,
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...
  Hastings around 940 PM CDT. 
  Prescott around 945 PM CDT. 
  Afton around 950 PM CDT. 

Other locations impacted by these severe thunderstorms include
Newport, Afton State Park, Vermillion, Lake St Croix Beach, Lakeland
Shores, St Paul Park, Lilydale, Hampton and St Marys Point.

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 100 AM CDT for southeastern
and east central Minnesota.

LAT...LON 4455 9304 4472 9307 4494 9315 4495 9276
      4491 9276 4490 9278 4482 9277 4475 9281
      4470 9273 4463 9273 4463 9279 4454 9280
      4454 9292
TIME...MOT...LOC 0233Z 278DEG 26KT 4490 9306 4472 9294 4463 9298 

HAIL...1.00IN
WIND...60MPH
 
$$
610 
WWUS53 KMPX 100251
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
951 PM CDT SUN JUL 9 2017

MNC037-123-163-100300-
/O.EXP.KMPX.SV.W.0125.000000T0000Z-170710T0300Z/
Dakota MN-Washington MN-Ramsey MN-
951 PM CDT SUN JUL 9 2017

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN DAKOTA...SOUTHERN
WASHINGTON AND SOUTHEASTERN RAMSEY COUNTIES WILL EXPIRE AT 1000 PM
CDT...

The storms which prompted the warning have  weakened and moved out 
of the warned area. Therefore, the warning will be allowed to expire.

A tornado watch remains in effect until 100 AM CDT for southeastern
and east central Minnesota.

LAT...LON 4455 9304 4472 9307 4494 9315 4495 9276
      4491 9276 4490 9278 4482 9277 4475 9281
      4470 9273 4463 9273 4463 9279 4454 9280
      4454 9292
TIME...MOT...LOC 0250Z 278DEG 26KT 4488 9290 4470 9278 4461 9282 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 7:35 PM CDTSevere Thunderstorm WarningMPXStevens, Swift40 min
Jul 9, 7:50 PM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison40 min
Jul 9, 7:51 PM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Renville39 min
Jul 9, 7:57 PM CDTTornado WarningMPXStevens, Swift33 min
Jul 9, 8:09 PM CDTTornado WarningMPXSwift28 min
Jul 9, 8:21 PM CDTTornado WarningMPXChippewa, Lac qui Parle39 min
Jul 9, 8:22 PM CDTSevere Thunderstorm WarningMPXBenton, Morrison38 min
Jul 9, 8:25 PM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs40 min
Jul 9, 8:28 PM CDTSpecial Weather StatementMPXMcLeod, Scott47 min
Jul 9, 8:33 PM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley42 min
Jul 9, 8:54 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Yellow Medicine66 min
Jul 9, 8:55 PM CDTSevere Thunderstorm WarningMPXBenton, Sherburne25 min
Jul 9, 8:56 PM CDTSevere Thunderstorm WarningMPXDakota, Le Sueur, Rice, Scott34 min
Jul 9, 8:58 PM CDTSevere Thunderstorm WarningMPXChippewa, Swift47 min
Jul 9, 9:03 PM CDTSevere Thunderstorm WarningMPXNicollet, Sibley42 min
Jul 9, 9:06 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Pope, Stearns27 min
Jul 9, 9:09 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Swift20 min
Jul 9, 9:11 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet, Waseca49 min
Jul 9, 9:23 PM CDTSevere Thunderstorm WarningMPXDakota, Rice, Scott53 min
Jul 9, 9:26 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet49 min
Jul 9, 9:30 PM CDTTornado WarningMPXNicollet30 min
Jul 9, 9:51 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Steele, Waseca54 min
Jul 9, 10:10 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Nicollet35 min
Jul 9, 10:19 PM CDTTornado WarningMPXBlue Earth41 min
Jul 9, 10:34 PM CDTSevere Thunderstorm WarningMPXNicollet, Sibley41 min
Jul 9, 10:41 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn, Steele, Waseca64 min
Jul 9, 10:51 PM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley39 min
Jul 9, 10:55 PM CDTSevere Thunderstorm WarningMPXBrown, Redwood, Renville35 min
Jul 9, 11:05 PM CDTSevere Thunderstorm WarningMPXBlue Earth40 min
Jul 9, 11:17 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn43 min
Jul 9, 11:39 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet, Watonwan37 min
Jul 9, 11:55 PM CDTSevere Thunderstorm WarningMPXRedwood18 min
Jul 10, 12:05 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Martin40 min
Jul 10, 12:45 AM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn30 min
Jul 10, 12:47 AM CDTSevere Thunderstorm WarningMPXNicollet26 min
Jul 10, 1:30 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Watonwan35 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.