Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 151, NWS Twin Cities, MN

July 15, 20114 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 15, 2011, 3:34 PM CDT for 4 counties in Minnesota. It was in force for 26 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 15, 2011, 3:34 PM CDT (20:34 UTC)
Expired
Jul 15, 2011, 4:00 PM CDT
In force
26 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Freeborn County, MN, Rice County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 94 km from the middle of the area, began a volume at 20:33 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 12:00Z, 8.6 hours before the alert went out and 95 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 2011-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1183 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 12:00Z on 2011-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 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
1183 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

692 
WUUS53 KMPX 152034
SVRMPX
MNC047-131-147-161-152100-
/O.NEW.KMPX.SV.W.0151.110715T2034Z-110715T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
334 PM CDT FRI JUL 15 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
  STEELE COUNTY IN SOUTH CENTRAL MINNESOTA...
  EASTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 400 PM CDT

* AT 333 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MORRISTOWN TO 6
  MILES WEST OF OWATONNA TO 6 MILES NORTHWEST OF CLARKS GROVE...AND
  MOVING EAST AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  OWATONNA...
  FARIBAULT...
  NEW RICHLAND...
  MANCHESTER...
  MORRISTOWN...
  DEERFIELD...
  WARSAW...
  ELLENDALE...
  CLARKS GROVE...
  GENEVA...
  MEDFORD...
  STEELE CENTER...
  HOLLANDALE...
  BIXBY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 4373 9358 4405 9345 4420 9356 4420 9353
      4432 9352 4432 9304 4385 9303 4372 9305
TIME...MOT...LOC 2034Z 271DEG 39KT 4425 9348 4405 9332
          4381 9341
WIND...HAIL 60MPH <.75IN

$$
1 follow-up statement
688 
WWUS53 KMPX 152049
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
349 PM CDT FRI JUL 15 2011

MNC161-152104-
/O.CAN.KMPX.SV.W.0151.000000T0000Z-110715T2100Z/
WASECA MN-
349 PM CDT FRI JUL 15 2011

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

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF
THE WARNED AREA.

LAT...LON 4374 9343 4385 9341 4401 9340 4420 9341
      4420 9353 4432 9352 4432 9304 4385 9303
      4372 9305
TIME...MOT...LOC 2049Z 271DEG 39KT 4424 9325 4404 9309
          4380 9319

$$

MNC047-131-147-152100-
/O.CON.KMPX.SV.W.0151.000000T0000Z-110715T2100Z/
FREEBORN MN-RICE MN-STEELE MN-
349 PM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR STEELE...
SOUTHERN RICE AND NORTHEASTERN FREEBORN COUNTIES UNTIL 400 PM CDT...

AT 347 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
FARIBAULT TO 6 MILES SOUTHEAST OF OWATONNA TO GENEVA...MOVING EAST AT
45 MPH.

LOCATIONS IMPACTED INCLUDE...
  BIXBY...RUSKIN...BLOOMING PRAIRIE...MERTON AND MOLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4374 9343 4385 9341 4401 9340 4420 9341
      4420 9353 4432 9352 4432 9304 4385 9303
      4372 9305
TIME...MOT...LOC 2049Z 271DEG 39KT 4424 9325 4404 9309
          4380 9319
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 3:40 AM CDTExcessive Heat WatchMPXAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more36 hr
Jul 15, 4:58 AM CDTSevere Thunderstorm WarningMPXDouglas62 min
Jul 15, 5:55 AM CDTAreal Flood AdvisoryMPXDouglas, Todd3 hr
Jul 15, 6:13 AM CDTSpecial Weather StatementMPXTodd62 min
Jul 15, 6:19 AM CDTSevere Thunderstorm WarningMPXDouglas, Stearns, Todd56 min
Jul 15, 6:44 AM CDTSevere Thunderstorm WarningMPXStearns, Todd61 min
Jul 15, 6:50 AM CDTSevere Thunderstorm WarningMPXDouglas55 min
Jul 15, 7:05 AM CDTSevere Thunderstorm WarningMPXStearns55 min
Jul 15, 7:11 AM CDTSpecial Weather StatementMPXMorrison79 min
Jul 15, 7:33 AM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Todd57 min
Jul 15, 8:14 AM CDTFlash Flood WarningMPXDouglas, Todd3 hr
Jul 15, 8:37 AM CDTSpecial Weather StatementMPXStearns53 min
Jul 15, 8:51 AM CDTFlash Flood WarningMPXPope, Stearns3 hr
Jul 15, 9:00 AM CDTSevere Thunderstorm WarningMPXMeeker, Stearns, Wright45 min
Jul 15, 9:36 AM CDTRiver Flood WarningMPXTodd5 days
Jul 15, 10:12 AM CDTSpecial Weather StatementMPXAnoka, Hennepin, Sherburne, Wright63 min
Jul 15, 11:07 AM CDTSpecial Weather StatementMPXFreeborn, Steele38 min
Jul 15, 12:41 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice52 min
Jul 15, 12:52 PM CDTFlood WatchMPXAnoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 22 more13 hr
Jul 15, 2:45 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet, Waseca44 min
Jul 15, 3:09 PM CDTAreal Flood AdvisoryMPXBlue Earth, Carver, Le Sueur, Nicollet, Rice, Scott and 2 more3 hr
Jul 15, 3:20 PM CDTSpecial Weather StatementMPXFreeborn, Le Sueur, Rice, Steele, Waseca55 min
Jul 15, 3:35 PM CDTFlash Flood WarningMPXDakota, Le Sueur, Rice, Scott, Steele, Waseca3 hr
Jul 15, 3:46 PM CDTExcessive Heat WarningMPXAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more5 days
Jul 15, 3:50 PM CDTFlash Flood WarningMPXDakota, Goodhue, Rice3 hr
Jul 15, 4:55 PM CDTAreal Flood AdvisoryMPXFaribault, Freeborn, Steele, Waseca3 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011

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.