Alert archive / Nebraska / Severe Thunderstorm Watches in 1998

Severe Thunderstorm Watch 730

July 6, 19984 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 6, 1998, 2:15 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 6, 1998, 2:15 PM CDT (19:15 UTC)
Expired: Jul 6, 1998, 8:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 47 counties

Lyon County, IA, Rock County, MN, Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Garfield County, NE, Greeley County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Madison County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Rock County, NE, Stanton County, NE, Thurston County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE, Aurora County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The North Platte radar (KLNX), 166 km from the middle of the area, began a volume at 19:18 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 6, 2:16 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Douglas	34 min
Jul 6, 2:17 PM CDT	Tornado Warning	LBF	Brown	48 min
Jul 6, 2:21 PM CDT	Severe Thunderstorm Warning	LBF	Blaine	49 min
Jul 6, 2:39 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	36 min
Jul 6, 2:46 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson	49 min
Jul 6, 2:53 PM CDT	Severe Thunderstorm Warning	LBF	Rock	62 min
Jul 6, 3:18 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	32 min
Jul 6, 3:51 PM CDT	Severe Thunderstorm Warning	OAX	Knox	64 min
Jul 6, 3:54 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Yankton	36 min
Jul 6, 4:16 PM CDT	Flash Flood Warning	LBF	Boyd	3 hr
Jul 6, 4:27 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	63 min
Jul 6, 4:30 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	65 min
Jul 6, 4:30 PM CDT	Severe Thunderstorm Warning	FSD	Yankton	35 min
Jul 6, 4:45 PM CDT	Tornado Warning	OAX	Antelope, Knox, Pierce	60 min
Jul 6, 4:52 PM CDT	Severe Thunderstorm Warning	GID	Greeley	38 min
Jul 6, 5:07 PM CDT	Tornado Warning	OAX	Cedar	63 min
Jul 6, 5:19 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Madison	61 min
Jul 6, 5:19 PM CDT	Severe Thunderstorm Warning	OAX	Pierce, Wayne	61 min
Jul 6, 5:24 PM CDT	Tornado Warning	FSD	Dixon	46 min
Jul 6, 5:26 PM CDT	Severe Thunderstorm Warning	OAX	Stanton	79 min
Jul 6, 5:33 PM CDT	Severe Thunderstorm Warning	FSD	Clay	32 min
Jul 6, 5:37 PM CDT	Flash Flood Warning	FSD	Yankton	2 hr
Jul 6, 5:47 PM CDT	Severe Thunderstorm Warning	FSD	Dakota	48 min
Jul 6, 5:58 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Thurston	67 min
Jul 6, 5:58 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Thurston	62 min
Jul 6, 6:11 PM CDT	Tornado Warning	OAX	Colfax, Platte	64 min
Jul 6, 6:25 PM CDT	Tornado Warning	FSD	Dakota	30 min
Jul 6, 6:37 PM CDT	Severe Thunderstorm Warning	OAX	Dodge	63 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.3 hours before the alert went out and 213 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: 967 J/kg
Mixed-layer CIN: -226 J/kg
Mixed-layer LCL: 1761 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jul 6, 5:15 PM CDT	Tornado Watch	SPC	Buena Vista, Calhoun, Cherokee, Clay, Crawford, Harrison and 10 more	6 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 1998 Severe Thunderstorm Watches in South Dakota, 1998 Severe Thunderstorm Watches in Iowa, 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; radar from the NEXRAD Level II archive.