Alert archive / Minnesota / Mesoscale Discussions in 2007
Mesoscale Discussion 1748
The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2007, 8:49 PM CDT for 17 counties in Minnesota; 12 counties in Wisconsin. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2007, 8:49 PM CDT (01:49 UTC)
- Expired
- Aug 13, 2007, 10:45 PM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 29 counties
Anoka County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Barron County, WI, Buffalo County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI, Trempealeau County, WI
The radar
The Minneapolis radar (KMPX), 101 km from the middle of the area, began a volume at 01:51 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.8 hours before the alert went out and 103 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
- 2096 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 263 m²/s²
- 0-3 km storm-relative helicity
- 409 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
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 |
|---|---|---|---|---|
| Aug 13, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | Dodge, Fillmore, Freeborn, Houston, Mower, Olmsted and 4 more | 6 hr |
| Aug 13, 11:35 PM CDT | Mesoscale Discussion | SPC | Dakota, Fillmore, Goodhue, Houston, Olmsted, Ramsey and 5 more | 85 min |
| Aug 14, 1:23 AM CDT | Mesoscale Discussion | SPC | Dodge, Fillmore, Freeborn, Houston, Mower, Olmsted and 3 more | 67 min |
| Aug 14, 3:32 AM CDT | Mesoscale Discussion | SPC | Columbia, Crawford, Dane, Grant, Iowa, Lafayette and 1 more | 28 min |
Nearby
Mesoscale Discussions in Minnesota, 2007Mesoscale Discussions in Wisconsin, 2007Every mesoscale discussion in 2007
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.