Alert archive / Iowa / Mesoscale Discussions in 2003

Mesoscale Discussion 1745

July 9, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2003, 5:38 PM CDT for 4 states. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 9, 2003, 5:38 PM CDT (22:38 UTC)
Expired
Jul 9, 2003, 7:15 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 99 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cass County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clarke County, IA, Clinton County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin 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, Kossuth County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Bureau County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, Mercer County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Woodford County, IL, Blue Earth County, MN, Brown County, MN, Faribault County, MN, Freeborn County, MN, Martin County, MN, Nicollet County, MN, Redwood County, MN, Renville County, MN, Waseca County, MN, Watonwan County, MN, Clark County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO

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, 10.6 hours before the alert went out and 227 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 12:00Z on 2003-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 70 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 12:00Z on 2003-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 square meters per square second.1939Sfc1 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
70 J/kg
Mixed-layer CIN
-307 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.6

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 8, 8:59 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 36 more2 hr
Jul 8, 10:55 PM CDTSevere Thunderstorm WatchSPCBond, Cass, Champaign, Christian, Clark, Clay and 27 more5 hr
Jul 9, 2:21 AM CDTMesoscale DiscussionSPCBond, Cass, Champaign, Christian, Clark, Clay and 27 more114 min
Jul 9, 9:54 AM CDTMesoscale DiscussionSPCBureau, Champaign, Christian, Clark, Coles, Crawford and 28 more96 min
Jul 9, 11:10 AM CDTSevere Thunderstorm WatchSPCBureau, Champaign, Clark, Coles, DeWitt, Douglas and 17 more6 hr
Jul 9, 12:34 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Clinton, Effingham and 17 more56 min
Jul 9, 1:35 PM CDTMesoscale DiscussionSPCChampaign, Coles, Douglas, Edgar, Ford, Grundy and 4 more55 min
Jul 9, 3:12 PM CDTMesoscale DiscussionSPCClark, Edgar, Kankakee33 min
Jul 9, 3:15 PM CDTTornado WatchSPCCarroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 5 more6 hr
Jul 9, 5:04 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Crawford, Cumberland and 18 more86 min
Jul 9, 5:25 PM CDTTornado WatchSPCCass, Champaign, Christian, Clark, Coles, Cumberland and 24 more4 hr
Jul 9, 1:10 AM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Buena Vista and 55 more6 hr
Jul 9, 4:15 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Buena Vista and 50 more2 hr
Jul 9, 1:08 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Benton, Black Hawk, Boone and 47 more67 min
Jul 9, 2:00 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Benton, Black Hawk and 65 more6 hr
Jul 9, 2:30 PM CDTTornado WatchSPCBlue Earth, Brown, Carver, Dakota, Dodge, Faribault and 15 more6 hr
Jul 9, 2:10 PM CDTMesoscale DiscussionSPCBuchanan, Clay, Platte35 min
Jul 9, 3:55 PM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 22 more6 hr
Jul 9, 6:13 PM CDTMesoscale DiscussionSPCAndrew, Bates, Buchanan, Caldwell, Carroll, Cass and 26 more92 min

Nearby

Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Minnesota, 2003Every 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.