Alert archive / Nebraska / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 404

June 12, 200114 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 12, 2001, 12:45 AM MDT for 14 counties in Nebraska. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2001, 12:45 AM MDT (06:45 UTC)
Expired: Jun 12, 2001, 6:00 AM MDT
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Arthur County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Greeley County, NE, Hall County, NE, Howard County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Sherman County, NE, Valley County, NE

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 12, 1:26 AM MDT	Severe Thunderstorm Warning	LBF	Custer	64 min
Jun 12, 1:27 AM MDT	Severe Thunderstorm Warning	LBF	Lincoln	48 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 6.8 hours before the alert went out and 16 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: 2851 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 1533 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.8

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
Jun 11, 7:00 PM MDT	Severe Thunderstorm Watch	SPC	Boone, Burt, Butler, Clay, Colfax, Cuming and 21 more	6 hr
Jun 12, 12:45 AM MDT	Severe Thunderstorm Watch	SPC	Arthur, Buffalo, Custer, Dawson, Greeley, Hall and 8 more	5 hr
Jun 12, 2:00 PM MDT	Tornado Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more	6 hr
Jun 12, 5:00 PM MDT	Tornado Watch	SPC	Antelope, Boyd, Cedar, Dakota, Dixon, Holt and 4 more	6 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2001 Every severe thunderstorm watch in 2001

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.