Alert archive / Nebraska / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 156

April 20, 200111 counties in Kansas; 31 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Apr 20, 2001, 4:00 PM CDT for 11 counties in Kansas; 31 counties in Nebraska. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 20, 2001, 4:00 PM CDT (21:00 UTC)
Expired
Apr 20, 2001, 9:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 42 counties

Decatur County, KS, Graham County, KS, Jewell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Sheridan County, KS, Smith County, KS, Washington County, KS, Adams County, NE, Buffalo County, NE, Butler County, NE, Clay County, NE, Colfax County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Lincoln County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Saline County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Webster County, NE, York County, NE

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 20, 5:43 PM CDTSevere Thunderstorm WarningGLDDecatur, Gove, Sheridan, Thomas62 min
Apr 20, 5:43 PM CDTSevere Thunderstorm WarningGLDRed Willow62 min
Apr 20, 5:50 PM CDTSevere Thunderstorm WarningGLDGraham, Norton55 min
Apr 20, 5:54 PM CDTSevere Thunderstorm WarningLBFLincoln66 min
Apr 20, 5:59 PM CDTSevere Thunderstorm WarningGIDFurnas, Gosper61 min
Apr 20, 5:59 PM CDTSevere Thunderstorm WarningGIDDawson61 min
Apr 20, 5:59 PM CDTSevere Thunderstorm WarningLBFFrontier61 min
Apr 20, 6:25 PM CDTSevere Thunderstorm WarningGIDPhillips, Rooks65 min
Apr 20, 6:55 PM CDTSevere Thunderstorm WarningGIDFranklin, Harlan65 min
Apr 20, 7:12 PM CDTSevere Thunderstorm WarningGIDOsborne, Smith63 min
Apr 20, 7:30 PM CDTSevere Thunderstorm WarningGIDSherman60 min
Apr 20, 7:50 PM CDTSevere Thunderstorm WarningGIDJewell, Mitchell55 min
Apr 20, 8:08 PM CDTSevere Thunderstorm WarningTOPCloud, Ottawa, Republic47 min
Apr 20, 8:14 PM CDTSevere Thunderstorm WarningGIDClay, Nuckolls46 min
Apr 20, 8:23 PM CDTSevere Thunderstorm WarningGLDDecatur, Sheridan67 min
Apr 20, 8:25 PM CDTSevere Thunderstorm WarningLBFFrontier, Lincoln65 min
Apr 20, 8:28 PM CDTSevere Thunderstorm WarningGIDFillmore, Thayer62 min
Apr 20, 8:30 PM CDTSevere Thunderstorm WarningGLDRed Willow60 min
Apr 20, 8:39 PM CDTSevere Thunderstorm WarningTOPWashington51 min
Apr 20, 8:43 PM CDTSevere Thunderstorm WarningOAXJefferson, Saline47 min
Apr 20, 8:44 PM CDTSevere Thunderstorm WarningGIDHamilton, York46 min
Apr 20, 8:52 PM CDTSevere Thunderstorm WarningOAXSeward38 min
Apr 20, 8:53 PM CDTSevere Thunderstorm WarningLBFLincoln67 min
Apr 20, 8:56 PM CDTSevere Thunderstorm WarningGLDNorton49 min
Apr 20, 8:58 PM CDTTornado WarningGIDFillmore32 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.0 hours before the alert went out and 132 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2001-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2001-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 192 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
2145 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
192 m²/s²
0-3 km storm-relative helicity
341 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.

IssuedProductOfficeCountiesLasted
Apr 20, 6:45 PM CDTSevere Thunderstorm WatchSPCBarton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 13 more2 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2001Severe Thunderstorm Watches in Kansas, 2001Every 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.