Alert archive / Minnesota / Tornado Watches in 2006

Tornado Watch 776

September 16, 200621 counties in Iowa; 49 counties in Minnesota

The Storm Prediction Center issued this tornado watch at Sep 16, 2006, 5:07 PM CDT for 21 counties in Iowa; 49 counties in Minnesota. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Sep 16, 2006, 5:07 PM CDT (22:07 UTC)
Expired: Sep 17, 2006, 1:00 AM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Particularly dangerous situation: Yes
Largest hail expected: 3 in
Strongest gust expected: 60 kt

All 70 counties

Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Greene County, IA, Hancock County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winnebago County, IA, Wright County, IA, Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Cottonwood County, MN, Dakota County, MN, Douglas County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Jackson County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 138 km from the middle of the area, began a volume at 22:08 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: 80%
One or more EF2 to EF5 tornadoes: 70%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 80%
One or more hailstones of 2 inches or more: 50%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Sep 16, 5:18 PM CDT	Tornado Warning	FSD	Pipestone	42 min
Sep 16, 5:18 PM CDT	Tornado Warning	MPX	Chippewa, Swift	42 min
Sep 16, 6:39 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	51 min
Sep 16, 6:58 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Yellow Medicine	62 min
Sep 16, 7:03 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	27 min
Sep 16, 7:28 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	32 min
Sep 16, 7:43 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	47 min
Sep 16, 7:51 PM CDT	Tornado Warning	MPX	Redwood, Yellow Medicine	24 min
Sep 16, 8:02 PM CDT	Tornado Warning	MPX	Renville	43 min
Sep 16, 8:07 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	38 min
Sep 16, 8:12 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	20 min
Sep 16, 8:23 PM CDT	Severe Thunderstorm Warning	MPX	Meeker	52 min
Sep 16, 8:24 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	36 min
Sep 16, 8:29 PM CDT	Tornado Warning	DMX	Crawford	36 min
Sep 16, 8:33 PM CDT	Severe Thunderstorm Warning	MPX	McLeod	57 min
Sep 16, 8:48 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Wright	42 min
Sep 16, 8:56 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	34 min
Sep 16, 9:15 PM CDT	Tornado Warning	DMX	Pocahontas	30 min
Sep 16, 9:22 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	23 min
Sep 16, 9:27 PM CDT	Severe Thunderstorm Warning	MPX	Martin	63 min
Sep 16, 9:32 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault	58 min
Sep 16, 9:35 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Palo Alto	40 min
Sep 16, 9:36 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	39 min
Sep 16, 9:43 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Wright	47 min
Sep 16, 9:56 PM CDT	Severe Thunderstorm Warning	FSD	Ida	24 min
Sep 16, 10:02 PM CDT	Severe Thunderstorm Warning	MPX	Waseca	46 min
Sep 16, 10:04 PM CDT	Tornado Warning	MPX	Anoka	26 min
Sep 16, 10:09 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth	51 min
Sep 16, 10:29 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Hennepin, Washington	61 min
Sep 16, 10:32 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	43 min
Sep 16, 10:34 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford	41 min
Sep 16, 10:56 PM CDT	Tornado Warning	MPX	Anoka, Hennepin	34 min
Sep 16, 11:02 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Webster	43 min
Sep 16, 11:04 PM CDT	Severe Thunderstorm Warning	DMX	Greene	41 min
Sep 16, 11:13 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll	47 min
Sep 16, 11:19 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Wright	56 min
Sep 16, 11:28 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	32 min
Sep 16, 11:44 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele, Waseca	52 min
Sep 16, 11:45 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster	45 min
Sep 16, 11:46 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	34 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, 10.1 hours before the alert went out and 136 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: 624 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 291 m²/s²
0-3 km storm-relative helicity: 396 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 15, 8:32 PM CDT	Mesoscale Discussion	SPC	Adair, Audubon, Buena Vista, Calhoun, Carroll, Cass and 21 more	58 min
Sep 15, 8:50 PM CDT	Severe Thunderstorm Watch	SPC	Crawford, Fremont, Harrison, Mills, Monona, Montgomery and 2 more	4 hr
Sep 16, 1:25 PM CDT	Mesoscale Discussion	SPC	Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux and 1 more	3 hr
Sep 16, 1:53 PM CDT	Tornado Watch	SPC	Lyon, Monona, Plymouth, Sioux, Woodbury	8 hr
Sep 16, 3:24 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 7 more	96 min
Sep 16, 3:56 PM CDT	Tornado Watch	SPC	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	7 hr
Sep 16, 6:12 PM CDT	Mesoscale Discussion	SPC	Lyon	63 min
Sep 16, 5:29 PM CDT	Tornado Watch	SPC	Aitkin, Becker, Beltrami, Cass, Clay, Clearwater and 17 more	8 hr

Nearby

Tornado Watches in Minnesota, 2006 Tornado Watches in Iowa, 2006 Every 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.