Alert archive / Iowa / Mesoscale Discussions in 2007

Mesoscale Discussion 1514

July 17, 20075 states

The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2007, 11:24 PM CDT for 5 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Jul 17, 2007, 11:24 PM CDT (04:24 UTC)
Expired
Jul 18, 2007, 1:00 AM CDT
In force
96 min
Issued by
the Storm Prediction Center
All 85 counties

Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Cedar County, IA, Cerro Gordo County, IA, Cherokee County, IA, Chickasaw County, IA, Clay County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dickinson County, IA, Dubuque County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Kossuth County, IA, Linn County, IA, Louisa County, IA, Lyon County, IA, Marshall County, IA, Mitchell County, IA, Muscatine County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Scott County, IA, Sioux County, IA, Tama County, IA, Webster County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Bureau County, IL, Carroll County, IL, DeKalb County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Marshall County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Woodford County, IL, Faribault County, MN, Freeborn County, MN, Jackson County, MN, Martin County, MN, Mower County, MN, Nobles County, MN, Rock County, MN, Lincoln County, SD, Turner County, SD, Union County, SD, Grant County, WI, Lafayette County, WI

The radar

The Des Moines radar (KDMX), 114 km from the middle of the area, began a volume at 04:24 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, 4.4 hours before the alert went out and 200 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2007-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 78 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2007-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 236 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
78 J/kg
Mixed-layer CIN
-337 J/kg
Mixed-layer LCL
1823 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
236 m²/s²
0-3 km storm-relative helicity
388 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

IssuedProductOfficeCountiesLasted
Jul 17, 9:31 PM CDTSevere Thunderstorm WatchSPCBoone, Carroll, DeKalb, Jo Daviess, Lee, Ogle and 3 more6 hr
Jul 18, 3:35 AM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, Jo Daviess, Kane, Lee and 5 more85 min
Jul 18, 4:21 AM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Douglas and 10 more54 min
Jul 18, 4:59 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Champaign, Cook, DeKalb and 32 more91 min
Jul 18, 5:35 PM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Carroll, DeKalb, DeWitt, Fulton and 25 more6 hr
Jul 18, 6:38 PM CDTMesoscale DiscussionSPCChampaign, Cook, Douglas, DuPage, Edgar, Ford and 11 more97 min
Jul 18, 6:50 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, Henderson, Henry and 18 more85 min
Jul 18, 12:47 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista and 37 more2 hr
Jul 18, 2:09 PM CDTSevere Thunderstorm WatchSPCBlack Hawk, Boone, Bremer, Buena Vista, Butler, Calhoun and 33 more4 hr
Jul 18, 12:17 PM CDTMesoscale DiscussionSPCAnoka, Chisago, Isanti, Ramsey, Washington118 min
Jul 18, 3:42 PM CDTMesoscale DiscussionSPCAnoka, Dakota, Goodhue, Hennepin, Olmsted, Ramsey and 4 more63 min
Jul 18, 3:59 PM CDTSevere Thunderstorm WatchSPCAnoka, Carver, Dakota, Dodge, Fillmore, Goodhue and 14 more5 hr
Jul 18, 6:44 PM CDTMesoscale DiscussionSPCHouston, Winona2 hr
Jul 18, 1:51 PM CDTMesoscale DiscussionSPCBennett, Butte, Custer, Fall River, Gregory, Haakon and 10 more54 min
Jul 18, 2:53 PM CDTSevere Thunderstorm WatchSPCBennett, Butte, Custer, Fall River, Haakon, Hughes and 11 more7 hr
Jul 18, 4:15 PM CDTMesoscale DiscussionSPCAurora, Bon Homme, Brule, Charles Mix, Clay, Davison and 10 more3 hr
Jul 18, 1:37 PM CDTSevere Thunderstorm WatchSPCBrown, Calumet, Dodge, Door, Fond du Lac, Green Lake and 18 more7 hr
Jul 18, 5:46 PM CDTMesoscale DiscussionSPCBrown, Calumet, Dodge, Fond du Lac, Green Lake, Manitowoc and 11 more119 min

Nearby

Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Illinois, 2007Mesoscale Discussions in Minnesota, 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.