Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 16, NWS Twin Cities, MN

May 1, 2001Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 1, 2001, 6:31 PM CDT for Washington County, Minnesota. It was in force for 29 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: May 1, 2001, 6:31 PM CDT (23:31 UTC)
Expired: May 1, 2001, 7:00 PM CDT
In force: 29 min
Issued by: NWS Twin Cities, MN
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Washington County, MN

The radar

The Minneapolis radar (KMPX), 52 km from the middle of the area, began a volume at 23:32 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 1, 3:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 55 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: 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 012331
SVRMSP
MNC163-020000-

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 700 PM CDT

* AT 631 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL 4 MILES EAST OF COTTAGE GROVE...OR ABOUT 11 MILES WEST OF
  RIVER FALLS...MOVING EAST AT 25 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  WOODBURY.
  COTTAGE GROVE.
  AFTON.

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 4482 9300 4476 9282 4491 9276 4494 9292

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:29 PM CDT	Severe Thunderstorm Warning	MPX	Martin	61 min
May 1, 4:24 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Sibley	51 min
May 1, 4:36 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault	39 min
May 1, 4:36 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur	39 min
May 1, 4:50 PM CDT	Tornado Warning	MPX	Blue Earth	25 min
May 1, 4:55 PM CDT	Tornado Warning	MPX	Carver	35 min
May 1, 5:06 PM CDT	Severe Thunderstorm Warning	MPX	Waseca	39 min
May 1, 5:13 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	47 min
May 1, 5:18 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	42 min
May 1, 5:21 PM CDT	Tornado Warning	MPX	Anoka, Hennepin	24 min
May 1, 5:27 PM CDT	Severe Thunderstorm Warning	MPX	Steele	48 min
May 1, 5:35 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey, Washington	55 min
May 1, 5:37 PM CDT	Tornado Warning	MPX	Waseca	23 min
May 1, 5:49 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago	41 min
May 1, 6:03 PM CDT	Tornado Warning	MPX	Steele, Waseca	42 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.