Alert archive / Iowa / Mesoscale Discussions in 2003

Mesoscale Discussion 1505

June 25, 200313 counties in Illinois; 24 counties in Iowa; 14 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 25, 2003, 11:50 AM CDT for 13 counties in Illinois; 24 counties in Iowa; 14 counties in Wisconsin. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Jun 25, 2003, 11:50 AM CDT (16:50 UTC)
Expired: Jun 25, 2003, 1:45 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center

All 51 counties

Appanoose County, IA, Cedar County, IA, Clinton County, IA, Davis County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Mahaska County, IA, Monroe County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Boone County, IL, Carroll County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Lee County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Columbia County, WI, Dane County, WI, Dodge County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Rock County, WI, Sauk County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Quad Cities radar (KDVN), 66 km from the middle of the area, began a volume at 16:52 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.

Severe Thunderstorm Watch 589Jun 25, 12:05 PM CDT

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 4.8 hours before the alert went out and 64 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: 875 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1114 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 25, 12:05 PM CDT	Severe Thunderstorm Watch	SPC	Carroll, Henderson, Henry, Jo Daviess, Mercer, Ogle and 5 more	6 hr
Jun 25, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	Hancock	5 hr
Jun 25, 2:43 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Bureau, Carroll, Hancock, Henderson and 13 more	2 hr
Jun 25, 4:52 PM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Bureau, Calhoun, Cass and 70 more	113 min
Jun 25, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Boone, Brown, Bureau, Calhoun, Cass and 44 more	5 hr
Jun 24, 8:35 PM CDT	Tornado Watch	SPC	Lyon, Sioux	5 hr
Jun 24, 10:27 PM CDT	Mesoscale Discussion	SPC	Dickinson, Lyon, O'Brien, Osceola, Plymouth, Sioux	93 min
Jun 24, 10:55 PM CDT	Tornado Watch	SPC	Buena Vista, Cerro Gordo, Cherokee, Clay, Dickinson, Emmet and 11 more	5 hr
Jun 25, 12:37 AM CDT	Mesoscale Discussion	SPC	Boone, Butler, Calhoun, Carroll, Chickasaw, Crawford and 12 more	113 min
Jun 25, 10:36 AM CDT	Mesoscale Discussion	SPC	Adams, Appanoose, Benton, Cass, Clarke, Davis and 24 more	114 min
Jun 25, 11:38 AM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Carroll, Clay, Emmet, Greene and 8 more	2 hr
Jun 24, 7:09 PM CDT	Mesoscale Discussion	SPC	Burnett, Dunn, Pierce, Polk, Saint Croix	66 min
Jun 24, 8:15 PM CDT	Tornado Watch	SPC	Barron, Burnett, Douglas, Dunn, Pierce, Polk and 2 more	6 hr
Jun 25, 1:42 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Columbia, Dodge, Florence, Fond du Lac and 11 more	2 hr
Jun 25, 2:10 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Door, Florence, Forest, Kewaunee and 11 more	5 hr
Jun 25, 5:14 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Door, Florence, Forest, Kewaunee and 10 more	91 min

Nearby

Mesoscale Discussions in Iowa, 2003 Mesoscale Discussions in Wisconsin, 2003 Mesoscale Discussions in Illinois, 2003 Every mesoscale discussion in 2003

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.