Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 185, NWS Twin Cities, MN

July 23, 20014 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 2001, 2:29 AM CDT for 4 counties in Minnesota. It was in force for 61 min. 3 reports came from 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, with what was reported inside it.

The facts

Issued: Jul 23, 2001, 2:29 AM CDT (07:29 UTC)
Expired: Jul 23, 2001, 3:30 AM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Kandiyohi County, MN, Pope County, MN, Stearns County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 153 km from the middle of the area, began a volume at 07:32 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
Jul 23, 2:40 AM CDT	Thunderstorm Wind 60 E	Murdock, MN	Numerous trees down along a 12 mile long swath.
Jul 23, 2:40 AM CDT	Thunderstorm Wind 65 E	Starbuck, MN	Hundreds of trees down, some on houses, businesses and vehicles. Numerous docks and boats flipped along Lake Minnewaska in Starbuck.
Jul 23, 3:10 AM CDT	Thunderstorm Wind 60 E	Willmar, MN	Scattered trees down in a swath that extended to Atwater. Church under construction in Spicer blown down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.5 hours before the alert went out and 150 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: 2234 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 230732
SVRMSP

MNC067-121-145-151-230830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
229 AM CDT MON JUL 23 2001

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN SWIFT COUNTY IN WEST CENTRAL MINNESOTA
  WESTERN STEARNS COUNTY IN CENTRAL MINNESOTA
  KANDIYOHI COUNTY IN CENTRAL MINNESOTA
  POPE COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 330 AM CDT

* AT 229 AM...RADAR INDICATED A SEVERE THUNDERSTORM WITH             
  DAMAGING WINDS 5 MILES EAST OF BENSON. A SEVERE THUNDERSTORM WAS   
  ALSO INDICATED 5 MILES EAST OF MORRIS. THESE STORMS WERE MOVING    y
  EAST AT 35 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  GLENWOOD.
  MURDOCK.
  NEW LONDON.
  MELROSE.
  SAUK CENTRE. 
  WILLMAR.     

LAT...LON 4569 9563 4525 9568 4512 9484 4569 9467

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 9:29 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle	46 min
Jul 23, 1:48 AM CDT	Severe Thunderstorm Warning	MPX	Stevens, Swift	42 min
Jul 23, 3:13 AM CDT	Severe Thunderstorm Warning	MPX	Meeker, Stearns	47 min
Jul 23, 5:11 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet	49 min
Jul 23, 5:17 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti	28 min
Jul 23, 5:42 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth	48 min
Jul 23, 6:04 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur	41 min
Jul 23, 7:31 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	44 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.