Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 183, NWS Twin Cities, MN

July 26, 20115 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 26, 2011, 9:36 PM CDT for 5 counties in Minnesota. It was in force for 54 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 26, 2011, 9:36 PM CDT (02:36 UTC)
Expired: Jul 26, 2011, 10:30 PM CDT
In force: 54 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 70.0 mph

Counties Chippewa County, MN, Lac qui Parle County, MN, Pope County, MN, Stevens County, MN, Swift County, MN

The radar

The Aberdeen radar (KABR), 183 km from the middle of the area, began a volume at 02:37 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 26, 7:32 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.6 hours before the alert went out and 185 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: 3555 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 289 m²/s²
0-3 km storm-relative helicity: 399 m²/s²
Significant tornado parameter: 7.2
Supercell composite: 32.6

Open this sounding in Storm Lab

The text

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

476 
WUUS53 KMPX 270236
SVRMPX
MNC023-073-121-149-151-270330-
/O.NEW.KMPX.SV.W.0183.110727T0236Z-110727T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
936 PM CDT TUE JUL 26 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA...
  LAC QUI PARLE COUNTY IN WEST CENTRAL MINNESOTA...
  WESTERN POPE COUNTY IN WEST CENTRAL MINNESOTA...
  STEVENS COUNTY IN WEST CENTRAL MINNESOTA...
  SWIFT COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 1030 PM CDT

* AT 933 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS
  LOCATED 15 MILES WEST OF GRACEVILLE...OR ABOUT 19 MILES SOUTHWEST
  OF WHEATON...AND MOVING EAST AT 45 MPH.  NICKEL SIZE HAIL MAY ALSO
  ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  MORRIS...
  MADISON...
  BENSON...
  GLENWOOD...
  CHOKIO...
  NASSAU...
  MARIETTA...
  DONNELLY...
  ALBERTA...
  BELLINGHAM...
  LOUISBURG...
  HOLLOWAY...
  DANVERS...
  APPLETON...

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 MINOR DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW 
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT WEDNESDAY MORNING
FOR WEST CENTRAL MINNESOTA.

&&

LAT...LON 4526 9646 4526 9629 4523 9627 4520 9614
      4522 9611 4540 9613 4542 9625 4576 9626
      4576 9533 4542 9535 4493 9582 4489 9586
      4481 9585 4482 9644 4486 9647
TIME...MOT...LOC 0236Z 292DEG 38KT 4557 9670
WIND...HAIL 70MPH 0.88IN

$$

DWE

1 follow-up statement

215 
WWUS53 KMPX 270306
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1006 PM CDT TUE JUL 26 2011

MNC023-073-121-149-151-270330-
/O.CON.KMPX.SV.W.0183.000000T0000Z-110727T0330Z/
LAC QUI PARLE MN-CHIPPEWA MN-POPE MN-STEVENS MN-SWIFT MN-
1006 PM CDT TUE JUL 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SWIFT...
STEVENS...WESTERN POPE...NORTHWESTERN CHIPPEWA AND LAC QUI PARLE
COUNTIES IN WEST CENTRAL MINNESOTA UNTIL 1030 PM CDT...

AT 1003 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
WHEATON TO 8 MILES WEST OF CLINTON TO 15 MILES WEST OF BIG STONE
CITY...MOVING EAST AT 35 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY
THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  MORRIS...MADISON...BENSON...GLENWOOD...CHOKIO...NASSAU...
  BELLINGHAM...ALBERTA...DONNELLY...MARIETTA...LOUISBURG...
  APPLETON...HOLLOWAY...HANCOCK AND CYRUS.

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.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4526 9646 4526 9629 4523 9627 4520 9614
      4522 9611 4540 9613 4542 9625 4576 9626
      4576 9533 4542 9535 4493 9582 4489 9586
      4481 9585 4482 9644 4486 9647
TIME...MOT...LOC 0306Z 290DEG 29KT 4584 9650 4549 9656
          4524 9674
WIND...HAIL 70MPH 0.88IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 8:56 PM CDT	Special Weather Statement	MPX	Douglas, Stevens	64 min
Jul 26, 10:26 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Douglas, Lac qui Parle, Pope, Stevens, Swift	79 min
Jul 26, 11:59 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	61 min
Jul 27, 12:04 AM CDT	Flash Flood Watch	MPX	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 20 more	9 hr
Jul 27, 2:22 AM CDT	Special Weather Statement	MPX	Chisago, Isanti, Kanabec	23 min
Jul 27, 3:16 AM CDT	Special Weather Statement	MPX	Brown	59 min
Jul 27, 3:49 AM CDT	Special Weather Statement	MPX	Brown, McLeod, Nicollet, Sibley	56 min
Jul 27, 5:24 AM CDT	Areal Flood Advisory	MPX	Blue Earth, Faribault, Martin, Watonwan	4 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Every 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.