Alert archive / Wisconsin / Mesoscale Discussions in 2005

Mesoscale Discussion 1855

July 24, 2005Jo Daviess County, Illinois; Dubuque County, Iowa; Grant County, Iowa County, Lafayette County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2005, 11:11 PM CDT for Jo Daviess County, Illinois; Dubuque County, Iowa; Grant County, Iowa County, Lafayette County, Wisconsin. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jul 24, 2005, 11:11 PM CDT (04:11 UTC)
Expired: Jul 25, 2005, 12:15 AM CDT
In force: 64 min
Issued by: the Storm Prediction Center

Counties Dubuque County, IA, Jo Daviess County, IL, Grant County, WI, Iowa County, WI, Lafayette County, WI

The radar

The Quad Cities radar (KDVN), 125 km from the middle of the area, began a volume at 04:12 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

Davenport, (KDVN), launched 00:00Z, 4.2 hours before the alert went out and 124 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2277 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 2123 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 8:20 PM CDT	Severe Thunderstorm Watch	SPC	Jo Daviess, Stephenson	5 hr
Jul 25, 8:53 AM CDT	Mesoscale Discussion	SPC	Cook, DeKalb, DuPage, Grundy, Iroquois, Kane and 7 more	97 min
Jul 25, 10:05 AM CDT	Severe Thunderstorm Watch	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more	7 hr
Jul 25, 1:31 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 27 more	89 min
Jul 25, 3:50 PM CDT	Mesoscale Discussion	SPC	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	55 min
Jul 24, 8:26 PM CDT	Mesoscale Discussion	SPC	Boone, Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo and 19 more	94 min
Jul 24, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux	5 hr
Jul 24, 11:45 PM CDT	Mesoscale Discussion	SPC	Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux	60 min
Jul 25, 1:55 PM CDT	Mesoscale Discussion	SPC	Black Hawk, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 32 more	2 hr
Jul 25, 3:30 PM CDT	Tornado Watch	SPC	Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee, Chickasaw and 19 more	7 hr
Jul 25, 4:40 PM CDT	Tornado Watch	SPC	Allamakee, Clayton, Fayette, Winneshiek	7 hr
Jul 25, 4:53 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 20 more	67 min
Jul 25, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 17 more	4 hr
Jul 25, 6:56 PM CDT	Mesoscale Discussion	SPC	Allamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 18 more	94 min
Jul 25, 4:22 PM CDT	Mesoscale Discussion	SPC	Adams, Barron, Brown, Buffalo, Calumet, Chippewa and 42 more	23 min

Nearby

Mesoscale Discussions in Wisconsin, 2005 Mesoscale Discussions in Illinois, 2005 Mesoscale Discussions in Iowa, 2005 Every mesoscale discussion in 2005

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.