Alert archive / Iowa / Severe Thunderstorm Watches in 1998

Severe Thunderstorm Watch 352

May 15, 19984 states

The Storm Prediction Center issued this severe thunderstorm watch at May 15, 1998, 7:45 AM CDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: May 15, 1998, 7:45 AM CDT (12:45 UTC)
Expired: May 15, 1998, 12:00 PM CDT
In force: 4 hr
Issued by: the Storm Prediction Center

All 65 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Harrison County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Story County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Brown County, KS, Doniphan County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Sullivan County, MO, Worth County, MO, Cass 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, Washington County, NE

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 15, 7:52 AM CDT	Severe Thunderstorm Warning	TOP	Marshall, Nemaha, Pottawatomie	28 min
May 15, 8:05 AM CDT	Severe Thunderstorm Warning	TOP	Marshall, Nemaha	30 min
May 15, 8:05 AM CDT	Severe Thunderstorm Warning	TOP	Brown	30 min
May 15, 8:24 AM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha	61 min
May 15, 8:24 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	61 min
May 15, 8:28 AM CDT	Tornado Warning	OAX	Gage	47 min
May 15, 8:33 AM CDT	Severe Thunderstorm Warning	TOP	Brown	17 min
May 15, 8:33 AM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt	42 min
May 15, 8:39 AM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Otoe	61 min
May 15, 8:47 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Nodaway	48 min
May 15, 8:50 AM CDT	Tornado Warning	OAX	Lancaster, Otoe	65 min
May 15, 8:58 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	62 min
May 15, 8:58 AM CDT	Severe Thunderstorm Warning	OAX	Page	62 min
May 15, 9:10 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	65 min
May 15, 9:16 AM CDT	Severe Thunderstorm Warning	OAX	Montgomery	64 min
May 15, 9:18 AM CDT	Severe Thunderstorm Warning	DMX	Taylor	32 min
May 15, 9:28 AM CDT	Severe Thunderstorm Warning	DMX	Cass	37 min
May 15, 9:34 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	61 min
May 15, 9:46 AM CDT	Severe Thunderstorm Warning	DMX	Audubon	34 min
May 15, 10:03 AM CDT	Tornado Warning	OAX	Shelby	47 min
May 15, 10:13 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	32 min
May 15, 11:28 AM CDT	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	62 min

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 0.8 hours before the alert went out and 94 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: 1194 J/kg
Mixed-layer CIN: -370 J/kg
Mixed-layer LCL: 1627 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -76 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 15, 9:45 AM CDT	Severe Thunderstorm Watch	SPC	Audubon, Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo and 33 more	5 hr
May 15, 3:00 PM CDT	Tornado Watch	SPC	Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 72 more	6 hr
May 15, 5:00 PM CDT	Tornado Watch	SPC	Allamakee, Buchanan, Cedar, Clayton, Clinton, Delaware and 14 more	6 hr
May 14, 11:15 PM CDT	Tornado Watch	SPC	Barber, Barton, Clark, Clay, Cloud, Comanche and 31 more	6 hr
May 15, 5:50 AM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Butler and 42 more	6 hr
May 15, 4:00 PM CDT	Tornado Watch	SPC	Adair, Audrain, Boone, Callaway, Chariton, Clark and 31 more	6 hr
May 14, 7:15 PM CDT	Tornado Watch	SPC	Blaine, Boyd, Garfield, Holt, Knox, Logan and 4 more	6 hr

Nearby

Severe Thunderstorm Watches in Iowa, 1998 Severe Thunderstorm Watches in Missouri, 1998 Severe Thunderstorm Watches in Nebraska, 1998 Every severe thunderstorm 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.