Alert archive / Iowa / Mesoscale Discussions in 2009
Mesoscale Discussion 201
The Storm Prediction Center issued this mesoscale discussion at Mar 7, 2009, 8:09 PM CST for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 7, 2009, 8:09 PM CST (02:09 UTC)
- Expired
- Mar 8, 2009, 12:15 AM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 30 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Sioux County, IA, Woodbury County, IA, Faribault County, MN, Jackson County, MN, Martin County, MN, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Pierce County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE, Clay County, SD, Union County, SD
The radar
The Sioux Falls radar (KFSD), 133 km from the middle of the area, began a volume at 02:13 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, 2.2 hours before the alert went out and 266 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1519 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 12:58 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 6 more | 4 hr |
Nearby
Mesoscale Discussions in Iowa, 2009Mesoscale Discussions in Nebraska, 2009Mesoscale Discussions in Minnesota, 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.