Alert archive / Wisconsin / Mesoscale Discussions in 2007
Mesoscale Discussion 1749
The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2007, 11:35 PM CDT for Allamakee County, Iowa; 11 counties in Minnesota; 23 counties in Wisconsin. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2007, 11:35 PM CDT (04:35 UTC)
- Expired
- Aug 14, 2007, 1:00 AM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 35 counties
Allamakee County, IA, Dakota County, MN, Fillmore County, MN, Goodhue County, MN, Houston County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dunn County, WI, Eau Claire County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Marquette County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Richland County, WI, Saint Croix County, WI, Sauk County, WI, Trempealeau County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 35 km from the middle of the area, began a volume at 04:36 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, 4.6 hours before the alert went out and 188 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.
000 ACUS11 KWNS 140435 SWOMCD SPC MCD 140435 WIZ000-ILZ000-IAZ000-MNZ000-140600- MESOSCALE DISCUSSION 1749 NWS STORM PREDICTION CENTER NORMAN OK 1135 PM CDT MON AUG 13 2007 AREAS AFFECTED...SERN MN...SWRN WI...NERN IA CONCERNING...SEVERE THUNDERSTORM WATCH 594...595... VALID 140435Z - 140600Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 594...595...CONTINUES. WELL ORGANIZED...FAST MOVING...MCS/S ARE ACCELERATING SEWD ACROSS SRN PORTIONS OF WW594 INTO NRN PARTS OF WW595. LEADING MCS IS RACING SEWD AT 45-50KT AND WILL APPROACH THE SERN EDGE OF WW AROUND 08Z. SECONDARY UPSTREAM MCS IS SURGING SEWD ACROSS THE MSP METRO AREA AND WILL SOON ENTER NWRN PARTS OF WW595. VERY STRONG WINDS...AND EVEN HAIL...WILL BE NOTED WITH THESE ORGANIZED CLUSTERS. SUSTAINED WARM ADVECTION ALONG WARM FRONT WILL ENSURE THIS ACTIVITY SPREADS INTO NRN PORTIONS OF IL LATER THIS MORNING. ..DARROW.. 08/14/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...GRB...MKX...DVN...ARX...MPX... 44609371 42759099 42498958 43668888 44689099 45289298
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 | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 11 more | 6 hr |
| Aug 14, 1:23 AM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 27 more | 67 min |
| Aug 14, 2:45 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more | 4 hr |
| Aug 14, 3:32 AM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 7 more | 28 min |
| Aug 14, 5:43 AM CDT | Mesoscale Discussion | SPC | Cedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 7 more | 62 min |
| Aug 14, 3:05 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Benton, Black Hawk, Boone, Calhoun and 28 more | 85 min |
| Aug 14, 6:54 PM CDT | Mesoscale Discussion | SPC | Adair, Appanoose, Audubon, Boone, Calhoun, Carroll and 35 more | 66 min |
| Aug 13, 8:49 PM CDT | Mesoscale Discussion | SPC | Anoka, Chisago, Dakota, Dodge, Fillmore, Goodhue and 11 more | 116 min |
Nearby
Mesoscale Discussions in Wisconsin, 2007Mesoscale Discussions in Minnesota, 2007Mesoscale Discussions in Iowa, 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.