Alert archive / Nebraska / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 637

August 26, 200214 counties in Nebraska; 12 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Aug 26, 2002, 12:15 PM MDT for 14 counties in Nebraska; 12 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Aug 26, 2002, 12:15 PM MDT (18:15 UTC)
Expired: Aug 26, 2002, 6:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 26 counties

Arthur County, NE, Box Butte County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, Logan County, NE, McPherson County, NE, Morrill County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Stanley County, SD, Todd County, SD

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Aug 26, 12:17 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	58 min
Aug 26, 12:36 PM MDT	Tornado Warning	LBF	Cherry	39 min
Aug 26, 12:40 PM MDT	Severe Thunderstorm Warning	UNR	Meade	50 min
Aug 26, 1:17 PM MDT	Tornado Warning	LBF	Cherry	58 min
Aug 26, 1:27 PM MDT	Severe Thunderstorm Warning	UNR	Meade	63 min
Aug 26, 2:16 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	59 min
Aug 26, 2:20 PM MDT	Severe Thunderstorm Warning	UNR	Pennington	55 min
Aug 26, 2:25 PM MDT	Severe Thunderstorm Warning	UNR	Meade	35 min
Aug 26, 2:29 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	61 min
Aug 26, 3:03 PM MDT	Tornado Warning	LBF	Sheridan	57 min
Aug 26, 3:03 PM MDT	Tornado Warning	LBF	Sheridan	57 min
Aug 26, 3:12 PM MDT	Severe Thunderstorm Warning	UNR	Pennington	63 min
Aug 26, 3:15 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	60 min
Aug 26, 3:42 PM MDT	Severe Thunderstorm Warning	UNR	Custer	63 min
Aug 26, 3:49 PM MDT	Severe Thunderstorm Warning	LBF	Grant, Hooker, Thomas	56 min
Aug 26, 4:03 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	57 min
Aug 26, 4:18 PM MDT	Tornado Warning	UNR	Custer	42 min
Aug 26, 4:18 PM MDT	Tornado Warning	UNR	Custer	42 min
Aug 26, 4:29 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	61 min
Aug 26, 4:30 PM MDT	Severe Thunderstorm Warning	UNR	Fall River	60 min
Aug 26, 4:42 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	48 min
Aug 26, 4:47 PM MDT	Severe Thunderstorm Warning	LBF	Grant, Hooker, Thomas	58 min
Aug 26, 4:55 PM MDT	Flash Flood Warning	LBF	Grant	2 hr
Aug 26, 5:00 PM MDT	Severe Thunderstorm Warning	UNR	Custer	45 min
Aug 26, 5:15 PM MDT	Severe Thunderstorm Warning	LBF	Garden	60 min
Aug 26, 5:31 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	44 min
Aug 26, 5:31 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	44 min
Aug 26, 5:42 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, McPherson	63 min
Aug 26, 5:58 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	47 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 6.3 hours before the alert went out and 143 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: 1352 J/kg
Mixed-layer CIN: -301 J/kg
Mixed-layer LCL: 1219 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -47 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 26, 1:05 PM MDT	Severe Thunderstorm Watch	SPC	Chase, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more	5 hr
Aug 26, 4:30 PM MDT	Severe Thunderstorm Watch	SPC	Chase, Dundy, Hayes, Hitchcock, Perkins, Red Willow	6 hr
Aug 26, 5:10 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Banner, Box Butte, Cherry, Cheyenne, Dawes and 11 more	5 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2002 Severe Thunderstorm Watches in South Dakota, 2002 Every severe thunderstorm watch in 2002

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.