Alert archive / Iowa / Tornado Watches in 1998

Tornado Watch 703

June 29, 19984 states

The Storm Prediction Center issued this tornado watch at Jun 29, 1998, 4:15 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 29, 1998, 4:15 PM CDT (21:15 UTC)
Expired: Jun 29, 1998, 10:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 67 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Guthrie County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Adams County, IL, Hancock County, IL, Doniphan County, KS, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Clark County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Ralls County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO

Warnings issued inside it

23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 29, 4:30 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	65 min
Jun 29, 4:30 PM CDT	Severe Thunderstorm Warning	LSX	Clark, Knox, Lewis, Scotland	65 min
Jun 29, 4:51 PM CDT	Flash Flood Warning	LSX	Adams, Brown	3 hr
Jun 29, 4:51 PM CDT	Flash Flood Warning	LSX	Lewis	3 hr
Jun 29, 5:36 PM CDT	Severe Thunderstorm Warning	OAX	Page	49 min
Jun 29, 5:41 PM CDT	Severe Thunderstorm Warning	DMX	Clarke	49 min
Jun 29, 5:44 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	51 min
Jun 29, 6:00 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold	35 min
Jun 29, 6:03 PM CDT	Tornado Warning	DVN	Lee	62 min
Jun 29, 6:03 PM CDT	Severe Thunderstorm Warning	EAX	Putnam	42 min
Jun 29, 6:19 PM CDT	Severe Thunderstorm Warning	DMX	Decatur	66 min
Jun 29, 6:24 PM CDT	Tornado Warning	DVN	Hancock	51 min
Jun 29, 6:25 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	65 min
Jun 29, 6:31 PM CDT	Severe Thunderstorm Warning	EAX	Doniphan	59 min
Jun 29, 6:34 PM CDT	Severe Thunderstorm Warning	LSX	Clark	51 min
Jun 29, 6:47 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Putnam, Schuyler	28 min
Jun 29, 6:51 PM CDT	Tornado Warning	EAX	Buchanan	34 min
Jun 29, 7:03 PM CDT	Tornado Warning	EAX	Adair	27 min
Jun 29, 7:17 PM CDT	Tornado Warning	LSX	Knox	48 min
Jun 29, 7:39 PM CDT	Tornado Warning	LSX	Shelby	46 min
Jun 29, 8:30 PM CDT	Severe Thunderstorm Warning	EAX	Macon	30 min
Jun 29, 9:15 PM CDT	Flash Flood Warning	LSX	Audrain, Monroe, Shelby	4 hr
Jun 29, 9:52 PM CDT	Flash Flood Warning	EAX	Macon, Randolph	3 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.3 hours before the alert went out and 232 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: 2006 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 850 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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.

Issued	Product	Office	Counties	Lasted
Jun 28, 10:00 PM CDT	Severe Thunderstorm Watch	SPC	Champaign, Clark, Clay, Coles, Crawford, Cumberland and 14 more	5 hr
Jun 29, 12:00 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Calhoun, Cass, Christian, DeWitt and 26 more	6 hr
Jun 29, 1:00 PM CDT	Tornado Watch	SPC	Henderson, Jo Daviess, Mercer, Rock Island	4 hr
Jun 29, 3:15 PM CDT	Tornado Watch	SPC	Adams, Boone, Brown, Bureau, Carroll, Cass and 54 more	6 hr
Jun 29, 6:00 PM CDT	Tornado Watch	SPC	Alexander, Bond, Calhoun, Clark, Clay, Clinton and 36 more	6 hr
Jun 29, 12:30 AM CDT	Severe Thunderstorm Watch	SPC	Appanoose, Davis, Decatur, Fremont, Lee, Page and 4 more	6 hr
Jun 29, 11:15 AM CDT	Tornado Watch	SPC	Boone, Bremer, Buena Vista, Butler, Calhoun, Carroll and 35 more	6 hr
Jun 29, 3:45 PM CDT	Tornado Watch	SPC	Fremont, Mills	6 hr
Jun 28, 7:00 PM CDT	Tornado Watch	SPC	Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 29 more	6 hr

Nearby

Tornado Watches in Iowa, 1998 Tornado Watches in Missouri, 1998 Tornado Watches in Illinois, 1998 Every tornado watch in 1998

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.