Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 173, NWS Twin Cities, MN

June 17, 20127 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 17, 2012, 10:24 PM CDT for 7 counties in Minnesota. It was in force for 51 min. 9 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: Jun 17, 2012, 10:24 PM CDT (03:24 UTC)
Expired: Jun 17, 2012, 11:15 PM CDT
In force: 51 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carver County, MN, Hennepin County, MN, Le Sueur County, MN, McLeod County, MN, Scott County, MN, Sibley County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 14 km from the middle of the area, began a volume at 03:25 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

Time	Report	Where	Remark
Jun 17, 10:25 PM CDT	TSTM WND DMG	Glencoe, MN	TWENTY TO TWENTY FIVE INCH DIAMETER TREES FELLED.
Jun 17, 10:30 PM CDT	TSTM WND DMG	Lester Prairie, MN	TWENTY TO TWENTY FIVE INCH DIAMETER TREES TOPPLED.
Jun 17, 10:34 PM CDT	TSTM WND DMG	2 Nw New Germany, MN	EMPTY GRAIN BIN PUSHED IN AND PARTIALLY REMOVED FROM FOUNDATION. DAMAGE OCCURRED ON YALE AVE. DAMAGE TIME ESTIMATED FROM RADAR.
Jun 17, 10:34 PM CDT	TSTM WND DMG	3 Nw New Germany, MN	TWO THREE FOOT DIAMETER TREES TORN FROM THE GROUND. RESIDENTS HEARD A LARGE ROAR BEFORE DAMAGED OCCURRED ON YALE AVE. DAMAGE TIME ESTIMATED FROM RADAR.
Jun 17, 10:35 PM CDT	TSTM WND DMG	2 Ne New Germany, MN	FIVE SHEDS DAMAGED..WITH TWO DESTROYED. THREE CORN BINS DAMAGED...ONE TURNED OVER...ONE WRAPPED AROUND TREE...BOTH UNFILLED. PARTIALLY FILLED THIRD BIN DAMAGED BY ONE OF OTHER BINS. TIME OF DAMAGE ESTIMATED BY RADAR SINGATURE.
Jun 17, 10:36 PM CDT	TSTM WND DMG	3 Ne New Germany, MN	HOUSE LOST FIFTY PERCENT OF ITS ROOF. DAMAGE OCCURRED ON COUNTY ROAD 21. TIME ESTIMATED BY RADAR.
Jun 17, 10:40 PM CDT	TSTM WND DMG	Lester Prairie, MN	POWER OUT THROUGH MUCH OF CITY.
Jun 17, 10:53 PM CDT	TSTM WND DMG	Lester Prairie, MN	BRANCH SEVERED POWER LINE.
Jun 17, 11:11 PM CDT	TSTM WND GST 54	Belle Plaine, 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.

Issued	Product	Office	Lasted
Jun 17, 7:57 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.4 hours before the alert went out and 13 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1837 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 492 m²/s²
0-3 km storm-relative helicity: 747 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

045 
WUUS53 KMPX 180324
SVRMPX
MNC019-053-079-085-139-143-171-180415-
/O.NEW.KMPX.SV.W.0173.120618T0324Z-120618T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1024 PM CDT SUN JUN 17 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...
  EASTERN MCLEOD COUNTY IN CENTRAL MINNESOTA...
  SCOTT COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN SIBLEY COUNTY IN CENTRAL MINNESOTA...
  SOUTHEASTERN WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1115 PM CDT

* AT 1020 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM ROCKFORD TO LESTER PRAIRIE TO
  NEW AUBURN...AND MOVING SOUTHEAST AT 35 MPH.  PENNY SIZE HAIL MAY
  ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  GAYLORD...
  PLYMOUTH...
  LE SUEUR...
  MINNEAPOLIS...
  BLOOMINGTON...
  RICHFIELD...
  SHAKOPEE...
  NEW GERMANY...
  NEW AUBURN...
  GLENCOE...
  LESTER PRAIRIE...
  MONTROSE...
  WINSTED...
  DELANO...
  ROCKFORD...
  WATERTOWN...
  PLATO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK SHELTER 
NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4438 9378 4446 9394 4445 9399 4462 9445
      4491 9411 4522 9381 4505 9329 4491 9320
      4489 9317 4484 9320 4479 9332 4466 9344
TIME...MOT...LOC 0324Z 297DEG 30KT 4509 9374 4486 9397
          4464 9423
WIND...HAIL 60MPH 0.75IN

$$

1 follow-up statement

462 
WWUS53 KMPX 180340
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1040 PM CDT SUN JUN 17 2012

MNC019-053-079-085-139-143-171-180415-
/O.CON.KMPX.SV.W.0173.000000T0000Z-120618T0415Z/
CARVER MN-HENNEPIN MN-LE SUEUR MN-MCLEOD MN-SCOTT MN-SIBLEY MN-
WRIGHT MN-
1040 PM CDT SUN JUN 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
WRIGHT...EASTERN SIBLEY...SCOTT...EASTERN MCLEOD...NORTH CENTRAL LE
SUEUR...HENNEPIN AND CARVER COUNTIES UNTIL 1115 PM CDT...

AT 1034 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
ROCKFORD TO NORWOOD/YOUNG AMERICA TO ARLINGTON...MOVING SOUTHEAST AT
35 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

IN ADDITION...AT 1020 PM...72 MPH WINDS WERE MEASURED IN LESTER WITH 
THESE STORMS.

THE STRONGEST WINS ARE EXPECTED ACROSS CARVER COUNTY AND FAR SOUTHWEST
HENNEPIN COUNTY.

LOCATIONS IMPACTED INCLUDE...
  PLYMOUTH...LE SUEUR...MINNEAPOLIS...ST BONIFACIUS...LORETTO...
  CORCORAN...MINNETRISTA...MAPLE PLAIN...COLOGNE...MOUND...MEDINA...
  HAMEL...ORONO...VICTORIA AND LONG LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4446 9394 4447 9400 4463 9427 4473 9422
      4490 9407 4500 9403 4522 9381 4505 9329
      4489 9317 4484 9321 4478 9333 4466 9344
      4438 9378
TIME...MOT...LOC 0338Z 298DEG 28KT 4505 9369 4480 9382
          4458 9408
WIND...HAIL 70MPH 0.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:06 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Swift	39 min
Jun 17, 7:12 PM CDT	Tornado Warning	MPX	Chippewa, Swift	48 min
Jun 17, 7:15 PM CDT	Tornado Warning	MPX	Pope, Swift	26 min
Jun 17, 7:21 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Pope, Stevens, Swift	39 min
Jun 17, 7:53 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Pope, Stevens, Swift	67 min
Jun 17, 7:58 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Swift	47 min
Jun 17, 8:06 PM CDT	Tornado Warning	MPX	Chippewa, Kandiyohi, Swift	24 min
Jun 17, 8:25 PM CDT	Tornado Warning	MPX	Chippewa, Lac qui Parle, Swift	35 min
Jun 17, 8:33 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	42 min
Jun 17, 8:36 PM CDT	Areal Flood Advisory	MPX	Chippewa, Kandiyohi, Lac qui Parle, Pope, Renville, Stearns and 2 more	3 hr
Jun 17, 8:45 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Renville, Swift, Yellow Medicine	45 min
Jun 17, 8:56 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Sherburne, Stearns, Wright	49 min
Jun 17, 9:06 PM CDT	Tornado Warning	MPX	Kandiyohi, McLeod, Meeker	24 min
Jun 17, 9:25 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Meeker, Renville	65 min
Jun 17, 9:25 PM CDT	Tornado Warning	MPX	Carver, McLeod, Meeker, Wright	35 min
Jun 17, 9:28 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	47 min
Jun 17, 9:45 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Meeker, Sherburne, Stearns, Wright	45 min
Jun 17, 9:50 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, McLeod, Meeker, Sibley, Wright	40 min
Jun 17, 10:08 PM CDT	Areal Flood Advisory	MPX	Anoka, Carver, Dakota, Hennepin, McLeod, Meeker and 6 more	3 hr
Jun 17, 10:24 PM CDT	Tornado Warning	MPX	Renville	36 min
Jun 17, 10:30 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Renville	30 min
Jun 17, 10:41 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker, Renville, Sibley	49 min
Jun 17, 10:50 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi	40 min
Jun 17, 10:57 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Renville	33 min
Jun 17, 11:10 PM CDT	Special Weather Statement	MPX	Dakota, Ramsey, Scott	50 min
Jun 17, 11:22 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Nicollet, Rice, Scott, Sibley	38 min
Jun 17, 11:28 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Scott, Washington	32 min
Jun 17, 11:32 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Renville	43 min
Jun 17, 11:44 PM CDT	Flash Flood Warning	MPX	Dakota, Goodhue, Rice	6 hr
Jun 17, 11:50 PM CDT	Tornado Warning	MPX	Le Sueur	25 min
Jun 17, 11:53 PM CDT	Special Weather Statement	MPX	Meeker	52 min
Jun 17, 11:58 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Le Sueur, Rice	47 min
Jun 18, 12:20 AM CDT	Special Weather Statement	MPX	McLeod	40 min
Jun 18, 12:25 AM CDT	Special Weather Statement	MPX	Scott	50 min
Jun 18, 12:26 AM CDT	Special Weather Statement	MPX	Goodhue	49 min
Jun 18, 12:45 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice	45 min
Jun 18, 12:46 AM CDT	Flash Flood Warning	MPX	Dakota, Le Sueur, Rice, Scott	4 hr
Jun 18, 1:05 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Rice	40 min
Jun 18, 1:27 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Rice	33 min
Jun 18, 1:30 AM CDT	Special Weather Statement	MPX	Scott	30 min
Jun 18, 5:33 AM CDT	Areal Flood Warning	MPX	Dakota, Goodhue, Rice	6 hr
Jun 18, 11:17 AM CDT	River Flood Warning	MPX	Carver	10 days
Jun 18, 11:33 AM CDT	Areal Flood Warning	MPX	Dakota, Goodhue	18 hr
Jun 18, 4:31 PM CDT	Flash Flood Watch	MPX	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 24 more	56 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012 Every severe thunderstorm warning in 2012

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.