Alert archive / Nebraska / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 422

May 23, 20035 counties in Nebraska; Bennett County, Oglala Lakota County, Todd County, South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at May 23, 2003, 4:25 PM MDT for 5 counties in Nebraska; Bennett County, Oglala Lakota County, Todd County, South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: May 23, 2003, 4:25 PM MDT (22:25 UTC)
Expired: May 23, 2003, 10:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

Counties Cherry County, NE, Grant County, NE, Hooker County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Oglala Lakota County, SD, Todd County, SD

The radar

The North Platte radar (KLNX), 112 km from the middle of the area, began a volume at 22:25 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

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

Issued	Product	Office	Counties	Lasted
May 23, 4:27 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	63 min
May 23, 4:47 PM MDT	Severe Thunderstorm Warning	UNR	Todd	28 min
May 23, 5:00 PM MDT	Tornado Warning	LBF	Cherry	30 min
May 23, 5:31 PM MDT	Tornado Warning	LBF	Cherry	29 min
May 23, 6:02 PM MDT	Tornado Warning	LBF	Cherry	28 min
May 23, 6:27 PM MDT	Severe Thunderstorm Warning	UNR	Todd	48 min
May 23, 6:33 PM MDT	Tornado Warning	LBF	Cherry	27 min
May 23, 7:07 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	53 min
May 23, 8:03 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	57 min
May 23, 8:52 PM MDT	Severe Thunderstorm Warning	LBF	Thomas	38 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.4 hours before the alert went out and 190 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1422 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 7:48 PM MDT	Mesoscale Discussion	SPC	Arthur, Chase, Dawson, Dundy, Frontier, Furnas and 9 more	87 min
May 23, 1:54 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Garden, Kimball and 4 more	2 hr
May 23, 3:48 PM MDT	Mesoscale Discussion	SPC	Boyd, Brown, Garfield, Holt, Keya Paha, Loup and 1 more	57 min
May 23, 5:50 PM MDT	Mesoscale Discussion	SPC	Cherry, Grant, Hooker, Sheridan, Thomas	85 min

Nearby

Severe Thunderstorm Watches in Nebraska, 2003 Severe Thunderstorm Watches in South Dakota, 2003 Every severe thunderstorm watch 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.