Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 5, NWS Twin Cities, MN

May 1, 2001Carver County, McLeod County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 1, 2001, 4:24 PM CDT for Carver County, McLeod County, Sibley County, Minnesota. It was in force for 51 min. 4 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
May 1, 2001, 4:24 PM CDT (21:24 UTC)
Expired
May 1, 2001, 5:15 PM CDT
In force
51 min
Issued by
NWS Twin Cities, MN
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Carver County, MN, McLeod County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 45 km from the middle of the area, began a volume at 21:27 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
May 1, 4:30 PM CDTHail 1.25Plato, MN
May 1, 4:35 PM CDTHail 0.75Green Isle, MN
May 1, 4:40 PM CDTHail 1.75Hamburg, MN
May 1, 4:43 PM CDTHail 1.75Hamburg, MN

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
May 1, 3:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.4 hours before the alert went out and 42 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 12:00Z on 2001-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2001-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
771 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 012126
SVRMSP
MNC019-085-143-012215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
424 PM CDT TUE MAY 1 2001

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN SIBLEY COUNTY IN CENTRAL MINNESOTA
  EASTERN MCLEOD COUNTY IN CENTRAL MINNESOTA
  CARVER COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 515 PM CDT

* AT 424 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL AND DAMAGING WINDS 2 MILES SOUTH OF NEW AUBURN...OR ABOUT 18
  MILES SOUTHEAST OF HUTCHINSON...MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  GLENCOE.
  NEW AUBURN.
  GREEN ISLE.    
  HAMBURG.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 4477 9426 4456 9428 4469 9383 4494 9394

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 7:29 PM CDTSevere Thunderstorm WarningMPXMartin61 min
May 1, 4:36 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault39 min
May 1, 4:36 PM CDTSevere Thunderstorm WarningMPXLe Sueur39 min
May 1, 4:50 PM CDTTornado WarningMPXBlue Earth25 min
May 1, 4:55 PM CDTTornado WarningMPXCarver35 min
May 1, 5:06 PM CDTSevere Thunderstorm WarningMPXWaseca39 min
May 1, 5:13 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin47 min
May 1, 5:18 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn42 min
May 1, 5:21 PM CDTTornado WarningMPXAnoka, Hennepin24 min
May 1, 5:27 PM CDTSevere Thunderstorm WarningMPXSteele48 min
May 1, 5:35 PM CDTSevere Thunderstorm WarningMPXDakota, Ramsey, Washington55 min
May 1, 5:37 PM CDTTornado WarningMPXWaseca23 min
May 1, 5:49 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago41 min
May 1, 6:03 PM CDTTornado WarningMPXSteele, Waseca42 min
May 1, 6:31 PM CDTSevere Thunderstorm WarningMPXWashington29 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.