Alert archive / Minnesota / Mesoscale Discussions in 2012
Mesoscale Discussion 715
The Storm Prediction Center issued this mesoscale discussion at May 5, 2012, 2:58 PM CDT for 9 counties in Iowa; 26 counties in Minnesota; 4 counties in Wisconsin. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- May 5, 2012, 2:58 PM CDT (19:58 UTC)
- Expired
- May 5, 2012, 4:00 PM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 39 counties
Allamakee County, IA, Dickinson County, IA, Emmet County, IA, Howard County, IA, Kossuth County, IA, Mitchell County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Winona County, MN, Buffalo County, WI, Pepin County, WI, Pierce County, WI, Trempealeau County, WI
The radar
The Minneapolis radar (KMPX), 81 km from the middle of the area, began a volume at 19:59 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 12:00Z, 8.0 hours before the alert went out and 80 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
- 480 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 174 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
745 ACUS11 KWNS 051959 SWOMCD SPC MCD 051958 WIZ000-IAZ000-MNZ000-052100- MESOSCALE DISCUSSION 0715 NWS STORM PREDICTION CENTER NORMAN OK 0258 PM CDT SAT MAY 05 2012 AREAS AFFECTED...SRN MN...EXTREME NRN IA CONCERNING...SEVERE THUNDERSTORM WATCH 248... VALID 051958Z - 052100Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 248 CONTINUES. SUMMARY...SEVERE THREAT WILL SPREAD EAST ACROSS THE REMAINDER OF WW248 BY 22Z. DISCUSSION...WELL DEFINED MCS CONTINUES ITS PROGRESSION ACROSS SRN MN. LATEST RADAR DATA SUGGESTS LEADING EDGE OF STRONGEST CONVECTION IS MOVING EAST AT ROUGHLY 35KT WITH THE STRONGEST UPDRAFTS LOCATED ALONG THE MN/IA BORDER...ESPECIALLY WINNEBAGO CO IN IA WHERE VERY LARGE HAIL IS LIKELY OBSERVED. GIVEN THE CURRENT SPEED/MOVEMENT IT APPEARS THE GREATEST SEVERE THREAT WILL MIGRATE TOWARD THE ERN EDGE OF THE WATCH BETWEEN 21-22Z. ..DARROW.. 05/05/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...ARX...MPX...DMX...FSD... LAT...LON 44819538 44719128 43119129 43239539 44819538
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 8:30 PM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 10 more | 60 min |
| May 4, 9:54 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Crawford, Harrison, Ida, Monona and 5 more | 96 min |
| May 5, 6:49 AM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux | 7 hr |
| May 5, 11:38 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Cerro Gordo, Chickasaw, Clayton, Emmet, Fayette and 8 more | 6 hr |
| May 5, 2:09 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 8 more | 96 min |
| May 5, 3:52 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 8 more | 83 min |
| May 5, 4:56 PM CDT | Mesoscale Discussion | SPC | Bremer, Buchanan, Clayton, Delaware, Dubuque, Fayette and 1 more | 94 min |
| May 5, 5:31 PM CDT | Tornado Watch | SPC | Plymouth, Sioux, Woodbury | 5 hr |
| May 5, 6:46 PM CDT | Severe Thunderstorm Watch | SPC | Lyon | 6 hr |
| May 5, 9:50 AM CDT | Mesoscale Discussion | SPC | Brown, Cottonwood, Jackson, Lincoln, Lyon, Martin and 10 more | 55 min |
Nearby
Mesoscale Discussions in Minnesota, 2012Mesoscale Discussions in Iowa, 2012Mesoscale Discussions in Wisconsin, 2012Every mesoscale discussion in 2012
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.