Alert archive / Nebraska / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 522

July 7, 200116 counties in Nebraska; 9 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 7, 2001, 9:00 PM MDT for 16 counties in Nebraska; 9 counties in South Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jul 7, 2001, 9:00 PM MDT (03:00 UTC)
Expired: Jul 8, 2001, 2:00 AM MDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 25 counties

Arthur County, NE, Blaine County, NE, Brown County, NE, Cherry County, NE, Custer County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Todd County, SD, Tripp County, SD

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 7, 9:02 PM MDT	Severe Thunderstorm Warning	LBF	Garden	58 min
Jul 7, 9:22 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	53 min
Jul 8, 12:27 AM MDT	Severe Thunderstorm Warning	LBF	McPherson	48 min
Jul 8, 1:03 AM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Logan	42 min
Jul 8, 1:23 AM MDT	Severe Thunderstorm Warning	LBF	Custer	67 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.0 hours before the alert went out and 144 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: 1706 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 2540 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 8, 2:45 AM MDT	Severe Thunderstorm Watch	SPC	Boone, Butler, Colfax, Cuming, Dodge, Garfield and 11 more	3 hr
Jul 8, 2:30 PM MDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more	7 hr
Jul 8, 3:30 PM MDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Butler, Cedar, Colfax and 14 more	6 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2001 Severe Thunderstorm Watches in South Dakota, 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.