Alert archive / Nebraska / Tornado Watches in 1998

Tornado Watch 329

May 11, 199838 counties in Nebraska

The Storm Prediction Center issued this tornado watch at May 11, 1998, 5:00 PM CDT for 38 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 11, 1998, 5:00 PM CDT (22:00 UTC)
Expired
May 11, 1998, 11:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 38 counties

Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Brown County, NE, Buffalo County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Knox County, NE, Loup County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Sherman County, NE, Thayer County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 103 km from the middle of the area, began a volume at 22:03 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

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

IssuedProductOfficeCountiesLasted
May 11, 5:17 PM CDTSevere Thunderstorm WarningGIDBuffalo, Dawson, Sherman58 min
May 11, 5:39 PM CDTSevere Thunderstorm WarningLBFCuster36 min
May 11, 6:03 PM CDTTornado WarningGIDSherman42 min
May 11, 6:08 PM CDTSevere Thunderstorm WarningGIDValley67 min
May 11, 6:10 PM CDTSevere Thunderstorm WarningLBFHolt65 min
May 11, 6:13 PM CDTSevere Thunderstorm WarningLBFGarfield, Wheeler47 min
May 11, 6:26 PM CDTTornado WarningGIDHoward64 min
May 11, 6:35 PM CDTSevere Thunderstorm WarningGIDBuffalo, Hall40 min
May 11, 6:42 PM CDTSevere Thunderstorm WarningGIDSherman48 min
May 11, 6:57 PM CDTSevere Thunderstorm WarningOAXAntelope63 min
May 11, 7:01 PM CDTTornado WarningGIDHall44 min
May 11, 7:13 PM CDTTornado WarningGIDAdams47 min
May 11, 7:18 PM CDTSevere Thunderstorm WarningLBFHolt32 min
May 11, 7:22 PM CDTTornado WarningGIDMerrick38 min
May 11, 7:26 PM CDTSevere Thunderstorm WarningOAXKnox44 min
May 11, 7:28 PM CDTSevere Thunderstorm WarningGIDNuckolls62 min
May 11, 7:32 PM CDTSevere Thunderstorm WarningGIDClay58 min
May 11, 7:34 PM CDTSevere Thunderstorm WarningGIDHamilton56 min
May 11, 7:52 PM CDTSevere Thunderstorm WarningGIDNance38 min
May 11, 8:02 PM CDTSevere Thunderstorm WarningOAXAntelope, Pierce48 min
May 11, 8:03 PM CDTSevere Thunderstorm WarningGIDThayer57 min
May 11, 8:10 PM CDTSevere Thunderstorm WarningGIDFillmore65 min
May 11, 8:19 PM CDTTornado WarningGIDHamilton, Merrick41 min
May 11, 8:27 PM CDTSevere Thunderstorm WarningOAXBoone48 min
May 11, 8:44 PM CDTSevere Thunderstorm WarningGIDMerrick46 min
May 11, 8:58 PM CDTTornado WarningGIDHamilton, Merrick, Polk, York47 min
May 11, 9:03 PM CDTTornado WarningGIDThayer27 min
May 11, 9:25 PM CDTSevere Thunderstorm WarningGIDThayer35 min
May 11, 9:45 PM CDTSevere Thunderstorm WarningGIDPolk, York45 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.0 hours before the alert went out and 138 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 1998-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 163 joules per kilogram.LCLLFCEL10008507005003002001001 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 1998-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.1939Sfc1 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
163 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
620 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
56 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.

Nearby

Tornado Watches in Nebraska, 1998Every tornado watch in 1998

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.