Alert archive / Minnesota / Tornado Watches in 2006

Tornado Watch 808

October 3, 200629 counties in Minnesota; 10 counties in Wisconsin

The Storm Prediction Center issued this tornado watch at Oct 3, 2006, 3:34 PM CDT for 29 counties in Minnesota; 10 counties in Wisconsin. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Oct 3, 2006, 3:34 PM CDT (20:34 UTC)
Expired
Oct 4, 2006, 12:00 AM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 39 counties

Blue Earth County, MN, Brown County, MN, Carver County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Buffalo County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, La Crosse County, WI, Pepin County, WI, Pierce County, WI, Saint Croix County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The Minneapolis radar (KMPX), 32 km from the middle of the area, began a volume at 20:37 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
80%
One or more hailstones of 2 inches or more
60%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Oct 3, 6:54 PM CDTSevere Thunderstorm WarningMPXSaint Croix66 min
Oct 3, 7:09 PM CDTSevere Thunderstorm WarningMPXDunn66 min
Oct 3, 7:23 PM CDTTornado WarningMPXDunn, Saint Croix52 min
Oct 3, 8:03 PM CDTTornado WarningMPXEau Claire, Pepin42 min
Oct 3, 8:11 PM CDTSevere Thunderstorm WarningARXJackson, Trempealeau79 min
Oct 3, 10:04 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin26 min
Oct 3, 10:33 PM CDTSevere Thunderstorm WarningMPXLe Sueur27 min
Oct 3, 10:44 PM CDTSevere Thunderstorm WarningMPXScott46 min
Oct 3, 10:49 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Sherburne, Wright56 min
Oct 3, 10:50 PM CDTSevere Thunderstorm WarningMPXDunn, Saint Croix55 min
Oct 3, 11:10 PM CDTSevere Thunderstorm WarningMPXDakota50 min
Oct 3, 11:29 PM CDTSevere Thunderstorm WarningMPXScott34 min
Oct 3, 11:32 PM CDTSevere Thunderstorm WarningMPXWashington28 min
Oct 3, 11:44 PM CDTSevere Thunderstorm WarningMPXSaint Croix46 min
Oct 3, 11:59 PM CDTSevere Thunderstorm WarningMPXDakota46 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.6 hours before the alert went out and 32 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 2006-10-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 joules per kilogram.LCLLFCEL10008507005003002001001 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 2006-10-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
48 J/kg
Mixed-layer CIN
-465 J/kg
Mixed-layer LCL
1242 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 3, 11:58 AM CDTMesoscale DiscussionSPCBig Stone, Douglas, Grant, Lac qui Parle, Pope, Stearns and 4 more62 min
Oct 3, 12:32 PM CDTSevere Thunderstorm WatchSPCAitkin, Anoka, Benton, Big Stone, Carlton, Cass and 23 more7 hr
Oct 3, 2:57 PM CDTMesoscale DiscussionSPCAnoka, Blue Earth, Brown, Carver, Cottonwood, Dakota and 26 more93 min
Oct 3, 6:20 PM CDTMesoscale DiscussionSPCBlue Earth, Dakota, Dodge, Faribault, Fillmore, Freeborn and 13 more85 min
Oct 2, 8:26 PM CDTMesoscale DiscussionSPCColumbia, Dane, Dodge, Green, Jefferson, Kenosha and 7 more64 min
Oct 3, 6:06 PM CDTMesoscale DiscussionSPCBarron, Burnett, Langlade, Lincoln, Marathon, Menominee and 8 more84 min
Oct 3, 6:39 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Calumet, Clark, Columbia, Dodge and 27 more7 hr

Nearby

Tornado Watches in Minnesota, 2006Tornado Watches in Wisconsin, 2006Every tornado watch in 2006

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.