Alert archive / Iowa / Mesoscale Discussions in 2013
Mesoscale Discussion 1899
The Storm Prediction Center issued this mesoscale discussion at Sep 19, 2013, 4:29 PM CDT for 20 counties in Illinois; 37 counties in Iowa; 21 counties in Wisconsin. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Sep 19, 2013, 4:29 PM CDT (21:29 UTC)
- Expired
- Sep 19, 2013, 6:00 PM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 78 counties
Appanoose County, IA, Benton County, IA, Buchanan County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Davis County, IA, Decatur County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, DeKalb County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Kane County, IL, Knox County, IL, Lee County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Winnebago County, IL, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI
The radar
The Quad Cities radar (KDVN), 59 km from the middle of the area, began a volume at 21:29 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
Davenport, (KDVN), launched 12:00Z, 9.5 hours before the alert went out and 62 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
- 1919 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 89 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 |
|---|---|---|---|---|
| Sep 19, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Henderson, Henry, Jo Daviess, Mercer and 6 more | 6 hr |
| Sep 19, 1:19 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Butler, Calhoun and 33 more | 86 min |
| Sep 19, 2:43 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Cass, Clarke, Dallas and 22 more | 4 hr |
| Sep 19, 7:55 AM CDT | Mesoscale Discussion | SPC | Barron, Buffalo, Dunn, Pepin, Pierce, Polk and 1 more | 3 hr |
| Sep 19, 8:47 AM CDT | Severe Thunderstorm Watch | SPC | Ashland, Barron, Bayfield, Burnett, Chippewa, Douglas and 11 more | 5 hr |
| Sep 19, 10:38 AM CDT | Mesoscale Discussion | SPC | Barron, Buffalo, Burnett, Chippewa, Clark, Dunn and 13 more | 97 min |
| Sep 19, 12:28 PM CDT | Mesoscale Discussion | SPC | Ashland, Iron, Vilas | 92 min |
Nearby
Mesoscale Discussions in Iowa, 2013Mesoscale Discussions in Wisconsin, 2013Mesoscale Discussions in Illinois, 2013Every mesoscale discussion in 2013
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.