Alert archive / Iowa / Mesoscale Discussions in 2003

Mesoscale Discussion 1452

June 22, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2003, 9:30 AM CDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 22, 2003, 9:30 AM CDT (14:30 UTC)
Expired: Jun 22, 2003, 12:00 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 75 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Ida County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Palo Alto County, IA, Pocahontas County, IA, Pottawattamie County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Woodbury County, IA, Atchison County, KS, Brown County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Greenwood County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Lyon County, KS, Marshall County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Jackson County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, Worth County, MO, Burt County, NE, Cass County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE, Thurston County, NE, Washington County, NE

The radar

The Topeka radar (KTWX), 124 km from the middle of the area, began a volume at 14:30 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 559Jun 22, 1:00 PM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 2.5 hours before the alert went out and 110 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: 1217 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 708 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 254 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

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 22, 3:35 PM CDT	Tornado Watch	SPC	Buena Vista, Cherokee, Clay, Crawford, Dickinson, Harrison and 10 more	5 hr
Jun 22, 4:38 AM CDT	Mesoscale Discussion	SPC	Clay, Marshall, Nemaha, Republic, Washington	97 min
Jun 22, 12:35 PM CDT	Mesoscale Discussion	SPC	Atchison, Doniphan, Jackson, Jefferson, Leavenworth	115 min
Jun 22, 1:00 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Atchison, Coffey, Douglas, Franklin, Jackson and 10 more	5 hr
Jun 22, 1:51 PM CDT	Mesoscale Discussion	SPC	Anderson, Coffey, Douglas, Franklin, Jackson, Jefferson and 9 more	114 min
Jun 22, 5:29 PM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Jewell, Mitchell, Osborne, Republic and 1 more	61 min
Jun 21, 7:54 PM CDT	Mesoscale Discussion	SPC	Antelope, Arthur, Blaine, Boone, Boyd, Brown and 25 more	66 min
Jun 21, 8:15 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more	6 hr
Jun 21, 10:26 PM CDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Garfield, Holt, Keya Paha and 2 more	94 min
Jun 22, 1:27 AM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boyd, Brown, Cherry, Garfield and 9 more	63 min
Jun 22, 2:27 PM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Boyd, Butler, Cedar, Colfax and 18 more	2 hr

Nearby

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