Alert archive / Iowa / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 579

June 24, 200345 counties in Iowa; Worth County, Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jun 24, 2003, 2:05 AM CDT for 45 counties in Iowa; Worth County, Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 24, 2003, 2:05 AM CDT (07:05 UTC)
Expired
Jun 24, 2003, 7:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 46 counties

Adair County, IA, Adams County, IA, Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Clarke County, IA, Clayton County, IA, Dallas County, IA, Decatur County, IA, Delaware County, IA, Fayette County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Iowa County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn 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, Ringgold County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Worth County, MO

The radar

The Des Moines radar (KDMX), 43 km from the middle of the area, began a volume at 07:07 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.

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.1 hours before the alert went out and 329 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, Minneapolis, MN at 00:00Z on 2003-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1955 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, Minneapolis, MN at 00:00Z on 2003-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.19395878Sfc1 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
1955 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1314 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.8
Supercell composite
6.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 23, 8:08 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Calhoun, Carroll and 28 more67 min
Jun 23, 8:55 PM CDTTornado WatchSPCAudubon, Buena Vista, Calhoun, Carroll, Cass, Cerro Gordo and 24 more4 hr
Jun 23, 9:10 PM CDTMesoscale DiscussionSPCCherokee, Dickinson, Lyon, O'Brien, Osceola, Sioux65 min
Jun 23, 10:38 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Cherokee, Clay, Humboldt, Ida and 9 more67 min
Jun 23, 10:50 PM CDTTornado WatchSPCPlymouth5 hr
Jun 23, 11:45 PM CDTSevere Thunderstorm WatchSPCLyon, O'Brien, Osceola, Sioux6 hr
Jun 24, 12:35 AM CDTSevere Thunderstorm WatchSPCBoone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 24 more5 hr
Jun 24, 1:52 AM CDTMesoscale DiscussionSPCPlymouth53 min
Jun 24, 2:44 AM CDTMesoscale DiscussionSPCLyon, Osceola, Sioux2 hr
Jun 24, 3:09 AM CDTMesoscale DiscussionSPCBoone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 12 more96 min
Jun 24, 11:43 AM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Harrison, Mills, Montgomery and 3 more2 hr
Jun 24, 2:15 PM CDTTornado WatchSPCCherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux8 hr
Jun 24, 3:56 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Fremont, Guthrie and 6 more64 min
Jun 24, 5:25 PM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Boone, Buena Vista, Butler, Calhoun and 30 more5 hr
Jun 24, 5:59 PM CDTMesoscale DiscussionSPCLyon, O'Brien, Osceola, Plymouth, Sioux61 min

Nearby

Severe Thunderstorm Watches in Iowa, 2003Severe Thunderstorm Watches in Missouri, 2003Every severe thunderstorm watch 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.