Alert archive / Minnesota / Mesoscale Discussions in 2009

Mesoscale Discussion 236

March 22, 200914 counties in Iowa; 41 counties in Minnesota; Brookings County, Deuel County, Grant County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Mar 22, 2009, 11:28 PM CDT for 14 counties in Iowa; 41 counties in Minnesota; Brookings County, Deuel County, Grant County, South Dakota. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Mar 22, 2009, 11:28 PM CDT (04:28 UTC)
Expired
Mar 23, 2009, 2:30 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 58 counties

Cerro Gordo County, IA, Dickinson County, IA, Emmet County, IA, Franklin County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Benton County, MN, Big Stone County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Cottonwood County, MN, Douglas County, MN, Faribault County, MN, Freeborn County, MN, Grant County, MN, Hennepin County, MN, Jackson 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, Murray County, MN, Nicollet County, MN, Pipestone County, MN, Pope 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, Traverse County, MN, Waseca County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN, Brookings County, SD, Deuel County, SD, Grant County, SD

The radar

The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 04:28 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.5 hours before the alert went out and 140 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 00:00Z on 2009-03-23Temperature 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 00:00Z on 2009-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.193958Sfc1 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
1604 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
361 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 23, 3:11 PM CDTMesoscale DiscussionSPCCrawford, Fremont, Harrison, Mills, Monona, Plymouth and 3 more94 min
Mar 23, 3:50 PM CDTTornado WatchSPCAdams, Audubon, Cass, Crawford, Fremont, Harrison and 11 more6 hr
Mar 23, 6:04 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Buena Vista, Carroll, Cass and 26 more116 min
Mar 23, 4:59 AM CDTMesoscale DiscussionSPCButte, Custer, Harding, Lawrence6 hr
Mar 23, 10:13 AM CDTMesoscale DiscussionSPCGregory2 hr
Mar 23, 12:06 PM CDTMesoscale DiscussionSPCButte, Harding, Lawrence, Meade, Pennington, Perkins5 hr
Mar 23, 12:16 PM CDTTornado WatchSPCAurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 17 more4 hr
Mar 23, 6:56 PM CDTMesoscale DiscussionSPCButte, Campbell, Corson, Custer, Dewey, Haakon and 13 more3 hr

Nearby

Mesoscale Discussions in Minnesota, 2009Mesoscale Discussions in Iowa, 2009Mesoscale Discussions in South Dakota, 2009Every mesoscale discussion in 2009

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.