Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 221, NWS Twin Cities, MN

August 29, 2001Steele County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 29, 2001, 10:31 PM CDT for Steele County, Waseca County, Minnesota. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Aug 29, 2001, 10:31 PM CDT (03:31 UTC)
Expired: Aug 29, 2001, 11:30 PM CDT
In force: 59 min
Issued by: NWS Twin Cities, MN
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 79 km from the middle of the area, began a volume at 03:33 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 00:00Z, 3.5 hours before the alert went out and 81 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: 1904 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 390 m²/s²
0-3 km storm-relative helicity: 463 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 13.8

Open this sounding in Storm Lab

The text

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

536 
WUUS53 KMPX 300333
SVRMSP
MNC049-131-147-161-300430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1031 PM CDT WED AUG 29 2001

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASECA COUNTY IN SOUTH CENTRAL MINNESOTA
  RICE COUNTY IN SOUTH CENTRAL MINNESOTA
  STEELE COUNTY IN SOUTH CENTRAL MINNESOTA
  GOODHUE COUNTY IN SOUTHEAST MINNESOTA

* UNTIL 1130 PM CDT

* AT 1031 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS       
  WITH DAMAGING WINDS AND HAIL UP TO THREE QUARTERS OF AN INCH...       
  FROM NEAR NORTHFIELD...TO 15 MILES SOUTHWEST OF OWATONNA. THIS LINE   
  IS MOVING EAST AT 40 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  OWATONNA.
  FARIBAULT.
  CANNON FALLS.
  NORTHFIELD.

LAT...LON 4393 9358 4391 9324 4450 9238 4460 9269
          4444 9315

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 7:19 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	41 min
Aug 29, 7:46 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stearns	44 min
Aug 29, 8:00 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Swift	45 min
Aug 29, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	46 min
Aug 29, 8:33 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	27 min
Aug 29, 10:31 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Rice	59 min
Aug 29, 10:46 PM CDT	Severe Thunderstorm Warning	MPX	Washington	29 min
Aug 29, 11:02 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Sherburne	43 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2001 Every severe thunderstorm warning in 2001

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.