Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 39, NWS Twin Cities, MN

May 9, 2001Kanabec County, Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 9, 2001, 8:01 PM CDT for Kanabec County, Mille Lacs County, Minnesota. It was in force for 44 min. 2 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 9, 2001, 8:01 PM CDT (01:01 UTC)
Expired: May 9, 2001, 8:45 PM CDT
In force: 44 min
Issued by: NWS Twin Cities, MN
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Kanabec County, MN, Mille Lacs County, MN

What was reported inside it

Time	Report	Where	Remark
May 9, 8:15 PM CDT	Hail 1.75	Mora, MN
May 9, 8:23 PM CDT	Tornado F0	Quamba, MN	Tornado touched down on Knife lake and moved onto land. Docks and pontoon flipped. A few dozen trees downed.

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.

Issued	Product	Office	Lasted
May 9, 7:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.0 hours before the alert went out and 137 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: 1211 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1740 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 368 m²/s²
0-3 km storm-relative helicity: 795 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

708 
WUUS53 KMPX 100103
SVRMSP
MNC065-095-100145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
801 PM CDT WED MAY 9 2001

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MILLE LACS COUNTY IN MINNESOTA
  KANABEC COUNTY IN MINNESOTA

* UNTIL 845 PM CDT

* AT 801 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE   
HAIL AND DAMAGING WINDS ABOUT 18 MILES NORTHWEST OF MORA...MOVING 
EAST AT 30 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  ONAMIA...MORA AND LAKE MILLE LACS.

THIS IS A DANGEROUS STORM...STAY INDOORS AWAY FROM WINDOWS. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 4615 9352 4597 9353 4596 9317 4614 9308
 $$
CWS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:02 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	43 min
May 9, 7:05 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin	40 min
May 9, 7:09 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison	51 min
May 9, 7:14 PM CDT	Severe Thunderstorm Warning	MPX	Scott	31 min
May 9, 7:26 PM CDT	Severe Thunderstorm Warning	MPX	Steele, Waseca	64 min
May 9, 7:26 PM CDT	Tornado Warning	MPX	Scott	34 min
May 9, 7:29 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	61 min
May 9, 7:46 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	44 min
May 9, 7:46 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	44 min
May 9, 7:54 PM CDT	Tornado Warning	MPX	Dakota, Rice	36 min
May 9, 8:06 PM CDT	Tornado Warning	MPX	Kanabec, Mille Lacs	39 min
May 9, 8:10 PM CDT	Tornado Warning	MPX	Goodhue	35 min
May 9, 8:10 PM CDT	Tornado Warning	MPX	Steele	35 min
May 9, 8:44 PM CDT	Tornado Warning	MPX	Goodhue	31 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.