Alert archive / Nebraska / Tornado Warnings in 1998

Tornado Warning 62, NWS Omaha, NE

June 27, 1998Jefferson County, Nebraska

NWS Omaha, NE issued this tornado warning at Jun 27, 1998, 9:46 PM CDT for Jefferson County, Nebraska. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 27, 1998, 9:46 PM CDT (02:46 UTC)
Expired
Jun 27, 1998, 10:20 PM CDT
In force
34 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Jefferson County, NE

The radar

The Grand Island radar (KUEX), 111 km from the middle of the area, began a volume at 02:49 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.8 hours before the alert went out and 143 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, Omaha, NE at 00:00Z on 1998-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4815 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, Omaha, NE at 00:00Z on 1998-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.19395878Sfc1 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
4815 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1274 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
2.3
Supercell composite
15.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KOMA 280246 RRA
TOROMA
NEC095-280320-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
946 PM CDT SAT JUN 27 1998

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN JEFFERSON COUNTY IN SOUTHEASTERN NEBRASKA

* UNTIL 1020 PM CDT

* AT 944 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A POSSIBLE TORNADO 57 MILES SOUTH SOUTHWEST OF LINCOLN OR IN THE
  VICINITY OF STEELE CITY MOVING EAST AT 30 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  STEELE CITY                NOW

IF YOU ARE IN THE WARNED AREA...TAKE SHELTER IN A BASEMENT IF ONE
IS AVAILABLE.  OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR.  CARS AND MOBILE HOMES SHOULD BE ABANDONED.

SMITH

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 27, 8:19 PM CDTSevere Thunderstorm WarningOAXLancaster46 min
Jun 27, 8:28 PM CDTSevere Thunderstorm WarningOAXGage, Lancaster, Saline62 min
Jun 27, 8:50 PM CDTSevere Thunderstorm WarningOAXDouglas, Washington50 min
Jun 27, 8:50 PM CDTSevere Thunderstorm WarningOAXSarpy50 min
Jun 27, 9:10 PM CDTTornado WarningOAXGage50 min
Jun 27, 9:19 PM CDTSevere Thunderstorm WarningOAXJefferson31 min
Jun 27, 9:36 PM CDTSevere Thunderstorm WarningOAXGage49 min
Jun 27, 9:43 PM CDTTornado WarningOAXCass32 min
Jun 27, 10:03 PM CDTTornado WarningOAXGage32 min
Jun 27, 10:19 PM CDTSevere Thunderstorm WarningOAXCass46 min
Jun 27, 10:38 PM CDTSevere Thunderstorm WarningOAXGage47 min
Jun 27, 10:48 PM CDTFlash Flood WarningOAXGage, Jefferson6 hr

Nearby

Tornado Warnings in Nebraska, 1998Every tornado warning in 1998Tornadoes 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.