Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 245, NWS Twin Cities, MN

August 23, 20116 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 23, 2011, 4:04 AM CDT for 6 counties in Minnesota. It was in force for 56 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: Aug 23, 2011, 4:04 AM CDT (09:04 UTC)
Expired: Aug 23, 2011, 5:00 AM CDT
In force: 56 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kandiyohi County, MN, McLeod County, MN, Meeker County, MN, Renville County, MN, Stearns County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 110 km from the middle of the area, began a volume at 09:08 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
Aug 23, 3:34 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.1 hours before the alert went out and 107 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: 114 J/kg
Mixed-layer CIN: -258 J/kg
Mixed-layer LCL: 1559 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

935 
WUUS53 KMPX 230904
SVRMPX
MNC067-085-093-129-145-173-231000-
/O.NEW.KMPX.SV.W.0245.110823T0904Z-110823T1000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
404 AM CDT TUE AUG 23 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KANDIYOHI COUNTY IN CENTRAL MINNESOTA...
  EXTREME NORTHWESTERN MCLEOD COUNTY IN CENTRAL MINNESOTA...
  MEEKER COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN RENVILLE COUNTY IN CENTRAL MINNESOTA...
  STEARNS COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN YELLOW MEDICINE COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 500 AM CDT

* AT 358 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  ALBANY TO PRIAM TO CLARKFIELD...AND MOVING EAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  WILLMAR...
  ST CLOUD...
  LITCHFIELD...
  OLIVIA...
  ALBANY...
  SPICER...
  RAYMOND...
  PRIAM...
  LAKE HENRY...
  NEW LONDON...
  SPRING CREEK...
  HAZEL RUN...
  HOLDINGFORD...
  HAWICK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4487 9562 4479 9550 4477 9553 4477 9548
      4489 9548 4489 9526 4505 9525 4508 9519
      4577 9459 4577 9427 4567 9419 4562 9421
      4550 9414 4543 9405 4530 9416 4530 9426
      4504 9426 4471 9497 4471 9596
TIME...MOT...LOC 0904Z 270DEG 29KT 4569 9452 4508 9505
          4476 9572
WIND...HAIL 60MPH 1.00IN

$$

BAP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 12:08 AM CDT	Special Weather Statement	MPX	Martin, Watonwan	52 min
Aug 23, 12:44 AM CDT	Special Weather Statement	MPX	Redwood	46 min
Aug 23, 1:24 AM CDT	Special Weather Statement	MPX	Renville	51 min
Aug 23, 2:01 AM CDT	Special Weather Statement	MPX	Nicollet	44 min
Aug 23, 2:04 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet	26 min
Aug 23, 2:13 AM CDT	Special Weather Statement	MPX	Douglas, Stevens	62 min
Aug 23, 2:24 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stevens, Todd	66 min
Aug 23, 2:30 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Nicollet, Rice, Sibley	45 min
Aug 23, 2:51 AM CDT	Special Weather Statement	MPX	Freeborn	39 min
Aug 23, 2:55 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Stevens, Swift, Todd	65 min
Aug 23, 2:57 AM CDT	Special Weather Statement	MPX	Carver	48 min
Aug 23, 3:08 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	67 min
Aug 23, 3:12 AM CDT	Severe Thunderstorm Warning	MPX	Scott	33 min
Aug 23, 3:38 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Meeker, Pope, Stearns and 2 more	56 min
Aug 23, 3:40 AM CDT	Special Weather Statement	MPX	Dakota	50 min
Aug 23, 4:28 AM CDT	Special Weather Statement	MPX	Benton, Isanti, McLeod, Renville, Sherburne, Wright	47 min
Aug 23, 5:12 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Carver, Hennepin, Wright	46 min
Aug 23, 5:30 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Dakota, Ramsey	46 min
Aug 23, 5:52 AM CDT	Special Weather Statement	MPX	Washington	38 min
Aug 23, 6:12 AM CDT	Severe Thunderstorm Warning	MPX	Faribault	33 min
Aug 23, 6:42 AM CDT	Special Weather Statement	MPX	Freeborn	33 min

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.