Alert archive / Iowa / Mesoscale Discussions in 2003

Mesoscale Discussion 1492

June 24, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2003, 3:56 PM CDT for 4 states. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jun 24, 2003, 3:56 PM CDT (20:56 UTC)
Expired: Jun 24, 2003, 5:00 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center

All 22 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Fremont County, IA, Guthrie County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Taylor County, IA, Brown County, KS, Doniphan County, KS, Andrew County, MO, Atchison County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Nemaha County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 105 km from the middle of the area, began a volume at 20:59 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 584Jun 24, 5:25 PM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 8.9 hours before the alert went out and 216 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: 2592 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 731 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 23, 8:08 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 28 more	67 min
Jun 23, 8:55 PM CDT	Tornado Watch	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cass, Cerro Gordo and 24 more	4 hr
Jun 23, 9:10 PM CDT	Mesoscale Discussion	SPC	Cherokee, Dickinson, Lyon, O'Brien, Osceola, Sioux	65 min
Jun 23, 10:38 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Cherokee, Clay, Humboldt, Ida and 9 more	67 min
Jun 23, 10:50 PM CDT	Tornado Watch	SPC	Plymouth	5 hr
Jun 23, 11:45 PM CDT	Severe Thunderstorm Watch	SPC	Lyon, O'Brien, Osceola, Sioux	6 hr
Jun 24, 12:35 AM CDT	Severe Thunderstorm Watch	SPC	Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 24 more	5 hr
Jun 24, 1:52 AM CDT	Mesoscale Discussion	SPC	Plymouth	53 min
Jun 24, 2:05 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Allamakee, Benton, Black Hawk, Boone and 39 more	5 hr
Jun 24, 2:44 AM CDT	Mesoscale Discussion	SPC	Lyon, Osceola, Sioux	2 hr
Jun 24, 3:09 AM CDT	Mesoscale Discussion	SPC	Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 12 more	96 min
Jun 24, 11:43 AM CDT	Mesoscale Discussion	SPC	Adams, Cass, Fremont, Harrison, Mills, Montgomery and 3 more	2 hr
Jun 24, 2:15 PM CDT	Tornado Watch	SPC	Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux	8 hr
Jun 24, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Audubon, Boone, Buena Vista, Butler, Calhoun and 30 more	5 hr
Jun 24, 5:59 PM CDT	Mesoscale Discussion	SPC	Lyon, O'Brien, Osceola, Plymouth, Sioux	61 min
Jun 23, 8:17 PM CDT	Mesoscale Discussion	SPC	Cloud, Jewell, Phillips, Republic, Smith	58 min
Jun 23, 8:20 PM CDT	Tornado Watch	SPC	Norton, Phillips, Smith	3 hr
Jun 24, 3:47 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Rawlins, Sheridan, Sherman, Thomas	88 min
Jun 24, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Graham, Logan, Norton and 5 more	6 hr
Jun 24, 5:48 PM CDT	Mesoscale Discussion	SPC	Finney, Grant, Gray, Hamilton, Haskell, Kearny and 8 more	117 min
Jun 24, 6:30 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more	2 hr
Jun 23, 8:34 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Deuel, Kimball	86 min
Jun 23, 9:10 PM CDT	Tornado Watch	SPC	Banner, Box Butte, Cheyenne, Deuel, Garden, Kimball and 3 more	4 hr
Jun 23, 10:50 PM CDT	Tornado Watch	SPC	Arthur, Blaine, Chase, Custer, Dawson, Frontier and 10 more	5 hr
Jun 23, 11:08 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Garden, Grant, Kimball and 3 more	67 min
Jun 24, 12:50 AM CDT	Severe Thunderstorm Watch	SPC	Banner, Cheyenne, Deuel, Garden, Kimball, Morrill and 1 more	3 hr
Jun 24, 1:29 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Boyd, Brown, Buffalo and 22 more	3 hr

Nearby

Mesoscale Discussions in Iowa, 2003 Mesoscale Discussions in Missouri, 2003 Mesoscale Discussions in Kansas, 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.