Alert archive / Minnesota / Mesoscale Discussions in 2011
Mesoscale Discussion 717
The Storm Prediction Center issued this mesoscale discussion at May 10, 2011, 8:45 PM CDT for 5 counties in Iowa; 39 counties in Minnesota; 16 counties in Wisconsin. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- May 10, 2011, 8:45 PM CDT (01:45 UTC)
- Expired
- May 10, 2011, 10:15 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 60 counties
Allamakee County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Worth County, IA, Anoka County, MN, Becker County, MN, Benton County, MN, Blue Earth County, MN, Carver County, MN, Chisago County, MN, Crow Wing County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Isanti County, MN, Kanabec County, MN, Le Sueur County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Otter Tail County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Todd County, MN, Wabasha County, MN, Wadena County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Wright County, MN, Buffalo County, WI, Crawford County, WI, Dunn County, WI, Eau Claire County, WI, Iowa County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Richland County, WI, Saint Croix County, WI, Sauk County, WI, Trempealeau County, WI, Vernon County, WI
The radar
The Minneapolis radar (KMPX), 35 km from the middle of the area, began a volume at 01:46 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, 1.8 hours before the alert went out and 37 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
- 4330 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1463 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 292 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 33.9
The text
As transmitted, in the capitals the NWS used until 2016.
017
ACUS11 KWNS 110145
SWOMCD
SPC MCD 110145
WIZ000-IAZ000-MNZ000-110315-
MESOSCALE DISCUSSION 0717
NWS STORM PREDICTION CENTER NORMAN OK
0845 PM CDT TUE MAY 10 2011
AREAS AFFECTED...E-CNTRL MN
CONCERNING...TORNADO WATCH 271...
VALID 110145Z - 110315Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 271 CONTINUES.
STORMS WILL CONTINUE TO POSE A SEVERE THREAT FOR AT LEAST ANOTHER
HOUR OR TWO AS THEY TRACK NEWD INTO FAR E-CNTRL MN. WHILE LARGE HAIL
HAS BEEN THE MAIN CONCERN AND WILL CONTINUE TO BE...A BRIEF TORNADO
WILL ALSO BE POSSIBLE AS THE STORMS INTERACT WITH WARM FRONTAL
BOUNDARY.
FURTHER N AND E...SFC DEWPOINTS DIMINISH GREATLY FROM THE UPPER 60S
ENVIRONMENT WHERE STORMS ARE CURRENTLY LOCATED TO THE UPPER 40S AND
50S. COMBINED WITH LOSS OF DAYTIME HEATING...EXPECT THAT STORMS WILL
EVENTUALLY BEGIN A RAPID DECREASE IN INTENSITY WITH CONTINUED NEWD
TRACK INTO LESS FAVORABLE ENVIRONMENT.
..STOPPKOTTE.. 05/11/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MKX...DLH...ARX...MPX...DMX...FGF...
LAT...LON 47029598 47089563 46939501 46709433 46319360 45719258
44739119 43788993 43248942 43008942 42908955 42949040
43049159 43259276 43399356 43499380 44309435 45629518
46459579 46739594 47029598SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 8:09 AM CDT | Mesoscale Discussion | SPC | Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 32 more | 66 min |
| May 11, 1:23 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 17 more | 6 hr |
| May 11, 2:31 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Carroll, Cass, Crawford and 13 more | 59 min |
| May 11, 2:53 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 33 more | 6 hr |
| May 11, 3:38 PM CDT | Mesoscale Discussion | SPC | Allamakee, Appanoose, Benton, Black Hawk, Buchanan, Cedar and 26 more | 2 hr |
| May 11, 5:03 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 57 min |
| May 11, 6:17 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Jasper, Lucas and 9 more | 28 min |
| May 11, 3:19 AM CDT | Mesoscale Discussion | SPC | Door, Florence, Forest, Kewaunee, Langlade, Marinette and 2 more | 56 min |
| May 11, 12:55 PM CDT | Mesoscale Discussion | SPC | Adams, Columbia, Dane, Dodge, Green, Green Lake and 12 more | 65 min |
| May 11, 1:16 PM CDT | Mesoscale Discussion | SPC | Brown, Door, Forest, Kewaunee, Langlade, Lincoln and 10 more | 119 min |
Nearby
Mesoscale Discussions in Minnesota, 2011Mesoscale Discussions in Wisconsin, 2011Mesoscale Discussions in Iowa, 2011Every mesoscale discussion in 2011
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.