Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 190, NWS Twin Cities, MN

July 23, 2001Le Sueur County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 2001, 6:04 AM CDT for Le Sueur County, Minnesota. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 23, 2001, 6:04 AM CDT (11:04 UTC)
Expired
Jul 23, 2001, 6:45 AM CDT
In force
41 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Le Sueur County, MN

The radar

The Minneapolis radar (KMPX), 55 km from the middle of the area, began a volume at 11:03 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

TimeReportWhereRemark
Jul 23, 6:10 AM CDTThunderstorm Wind 50 EKasota, MNFew trees 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 watch it was issued in

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

IssuedProductOfficeLasted
Jul 23, 6:00 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.1 hours before the alert went out and 54 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2001-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2234 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2001-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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 231103
SVRMSP

MNC079-231145-

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 645 AM CDT

* AT 604 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL AND DAMAGING WINDS 5 MILES SOUTHWEST OF KASOTA...OR ABOUT 6
  MILES NORTHWEST OF MANKATO...MOVING EAST AT 25 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  MONTGOMERY.
  LE CENTER.
  KILKENNY.
  KASOTA.
  HEIDELBERG.
  CLEVELAND.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER
IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 9:29 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle46 min
Jul 23, 1:48 AM CDTSevere Thunderstorm WarningMPXStevens, Swift42 min
Jul 23, 2:29 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Pope, Stearns, Swift61 min
Jul 23, 3:13 AM CDTSevere Thunderstorm WarningMPXMeeker, Stearns47 min
Jul 23, 5:11 AM CDTSevere Thunderstorm WarningMPXBrown, Nicollet49 min
Jul 23, 5:17 AM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Isanti28 min
Jul 23, 5:42 AM CDTSevere Thunderstorm WarningMPXBlue Earth48 min
Jul 23, 7:31 AM CDTSevere Thunderstorm WarningMPXGoodhue44 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2001Every 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.