Alert archive / Minnesota / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 384, NWS Twin Cities, MN

September 12, 2005Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 12, 2005, 10:11 PM CDT for Hennepin County, Wright County, Minnesota. It was in force for 64 min. 11 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
Sep 12, 2005, 10:11 PM CDT (03:11 UTC)
Expired
Sep 12, 2005, 11:15 PM CDT
In force
64 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 22 km from the middle of the area, began a volume at 03:14 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
Sep 12, 10:15 PM CDTTSTM WND DMGCorcoran, MNPORTION OF HOME DAMAGED ALONG CR 19 IN SOUTHWEST PART OF CORCORAN. DETACHED GARAGE BLOWN DOWN.
Sep 12, 10:15 PM CDTTSTM WND DMGCorcoran, MNSIGNS BLOWN DOWN AT INTERSECTION OF COUNTY ROAD 116 AND COUNTY ROAD 30. WIRES DOWN IN TOWN.
Sep 12, 10:15 PM CDTTSTM WND DMGCorcoran, MNSIGNS BLOWN DOWN AT INTERSECTION OF COUNTY ROAD 116 AND COUNTY ROAD 30. WIRES WERE DOWNED. A TREE WAS DOWNED ONTO A CAR AND A GARAGE. A BARN WAS DESTROYED AND SEVERAL SHEDS WERE DAMAGED.
Sep 12, 10:15 PM CDTTSTM WND DMGGreenfield, MN*** 1 INJ *** ABOUT TEN HOMES WERE DAMAGED IN SOUTHEAST PORTION OF GREENFIELD...TWO SUFFERED SIGNIFICANT DAMAGE. ONE PERSON AT A HOME SUFFERED MINOR INJURIES. A TRACTOR TRAILER PARKED ON THE SIDE OF THE ROAD IN FRONT OF A HOME WAS BLOWN ON ITS SIDE.
Sep 12, 10:15 PM CDTTSTM WND DMGGreenfield, MNABOUT TEN HOMES DAMAGED IN SOUTHEAST PORTION OF GREENFIELD.
Sep 12, 10:15 PM CDTTSTM WND DMGGreenfield, MNABOUT TEN HOMES WERE DAMAGED IN SOUTHEAST PORTION OF GREENFIELD...TWO SUFFERED SIGNIFICANT DAMAGE. A TRACTOR TRAILER PARKED ON THE SIDE OF THE ROAD IN FRONT OF A HOME WAS BLOWN ON ITS SIDE.
Sep 12, 10:15 PM CDTTSTM WND DMGGreenfield, MNDAMAGE TO HALF A HOUSE
Sep 12, 10:15 PM CDTTSTM WND DMGIndependence, MNDETACHED GARAGE DAMAGED IN NORTHEAST PORTION OF TOWN.
Sep 12, 10:15 PM CDTTORNADOIndependence, MNSURVEY DETERMINED THE TORNADO PRODUCED F1 DAMAGE. THE TORNADO TOUCHED DOWN IN INDEPENDENCE...JUST SOUTHWEST OF LAKE SARAH. IT MOVED THROUGH THE EXTREME SOUTHEAST PART OF GREENFIELD BEFORE DISSIPATING IN THE SOUTHWEST CORNER OF CORCORAN. PATH LENGTH WAS THREE M
Sep 12, 10:34 PM CDTTSTM WND DMGCorcoran, MNWINDOWS BLOWN OUT
Sep 12, 10:34 PM CDTTSTM WND DMGIndependence, MNTREE DOWN

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
Sep 12, 7:45 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.2 hours before the alert went out and 21 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 2005-09-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 968 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 2005-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
968 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
851 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 130312
SVRMPX
MNC053-171-130415-
/O.NEW.KMPX.SV.W.0384.050913T0311Z-050913T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1011 PM CDT MON SEP 12 2005

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WRIGHT COUNTY IN CENTRAL MINNESOTA
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 1115 PM CDT

* AT 1009 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 65
  MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 11 MILES
  NORTHEAST OF BUFFALO TO 13 MILES SOUTHWEST OF EXCELSIOR...AND
  MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EXCELSIOR...
  MINNETONKA...
  MAPLE GROVE...
  PLYMOUTH...
  THE LAKE MINNETONKA AREA...
  EDEN PRAIRIE...
  BROOKLYN PARK...
  ST LOUIS PARK...
  MINNEAPOLIS...

THIS IS A DANGEROUS STORM THAT HAS A HISTORY OF PRODUCING WIDESPREAD 
WIND DAMAGE. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR 
DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE 
SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT 
AWAY FROM WINDOWS.

LAT...LON 4524 9401 4500 9401 4500 9375 4493 9374
      4491 9354 4483 9349 4489 9320 4522 9346

$$

KAT
1 follow-up statement
000 
WWUS53 KMPX 130349
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1048 PM CDT MON SEP 12 2005

MNC171-130358-
/O.CAN.KMPX.SV.W.0384.000000T0000Z-050913T0415Z/
WRIGHT MN-
1048 PM CDT MON SEP 12 2005

...THE SEVERE THUNDERSTORM WARNING FOR WRIGHT COUNTY IS CANCELLED...

THE LINE OF STORMS THAT PROMPTED THE SEVERE THUNDERSTORM WARNING FOR 
WRIGHT COUNTY HAS MOVED EAST OF THE AREA. THEREFORE...THE WARNING 
HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT TUESDAY MORNING
FOR SOUTHERN MINNESOTA.

LAT...LON 4522 9347 4493 9374 4491 9354 4483 9349
      4489 9320

$$

MNC053-130415-
/O.CON.KMPX.SV.W.0384.000000T0000Z-050913T0415Z/
HENNEPIN MN-
1048 PM CDT MON SEP 12 2005

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR HENNEPIN COUNTY...

AT 1043 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 13 MILES
NORTHEAST OF DAYTON TO RICHFIELD...AND MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WOODLAND...WAYZATA...ORONO...
MINNETONKA...MINNETRISTA...MEDICINE LAKE...HAMEL...EXCELSIOR...
DEEPHAVEN...THE LAKE MINNETONKA AREA...ST LOUIS PARK...ROBBINSDALE...
PLYMOUTH...OSSEO...NEW HOPE...MINNEAPOLIS...MEDINA...MAPLE PLAIN...
MAPLE GROVE...LONG LAKE...HOPKINS...GOLDEN VALLEY...EDINA...EDEN
PRAIRIE AND CRYSTAL.

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE... 
INCLUDING WINDOWS BLOWN OUT OF A HOME IN CORCORAN. THIS IS AN 
EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS

LAT...LON 4522 9347 4493 9374 4491 9354 4483 9349
      4489 9320

$$

KAT

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 12, 7:14 PM CDTTornado WarningMPXChippewa, Lac qui Parle, Yellow Medicine61 min
Sep 12, 7:31 PM CDTFlash Flood WarningMPXChippewa, Lac qui Parle, Yellow Medicine3 hr
Sep 12, 8:09 PM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Wright66 min
Sep 12, 8:18 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Renville57 min
Sep 12, 9:10 PM CDTFlash Flood WarningMPXWright3 hr
Sep 12, 9:10 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Sherburne, Wright65 min
Sep 12, 9:14 PM CDTSevere Thunderstorm WarningMPXKandiyohi, McLeod, Meeker, Renville61 min
Sep 12, 9:47 PM CDTFlash Flood WarningMPXAnoka, Isanti, Sherburne3 hr
Sep 12, 9:54 PM CDTSevere Thunderstorm WarningMPXCarver, Sibley66 min
Sep 12, 10:34 PM CDTFlash Flood WarningMPXChisago3 hr
Sep 12, 10:38 PM CDTSevere Thunderstorm WarningMPXDakota, Scott52 min
Sep 12, 10:41 PM CDTSevere Thunderstorm WarningMPXAnoka, Ramsey35 min
Sep 12, 11:04 PM CDTSevere Thunderstorm WarningMPXChisago, Washington56 min
Sep 12, 11:47 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Martin, Watonwan58 min
Sep 13, 12:26 AM CDTSevere Thunderstorm WarningMPXFreeborn, Steele, Waseca64 min
Sep 13, 12:44 AM CDTSevere Thunderstorm WarningMPXFaribault46 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2005Every severe thunderstorm warning in 2005

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.