Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 83, NWS Omaha, NE

July 7, 1997Madison County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 7, 1997, 5:45 PM CDT for Madison County, Nebraska. It was in force for 50 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 7, 1997, 5:45 PM CDT (22:45 UTC)
Expired
Jul 7, 1997, 6:35 PM CDT
In force
50 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Madison County, NE

The radar

The Omaha radar (KOAX), 122 km from the middle of the area, began a volume at 22:49 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.

What was reported inside it

TimeReportWhereRemark
Jul 7, 6:16 PM CDTHail 0.75Norfolk, NE
Jul 7, 6:30 PM CDTHail 2.75Battle Creek, NELarge hail damaged 12,000 acres of corn and 6,000 acres of soybeans.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.8 hours before the alert went out and 122 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 12:00Z on 1997-07-07Temperature 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, Omaha, NE at 12:00Z on 1997-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
929 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 3:44 PM CDTSevere Thunderstorm WarningOAXKnox51 min
Jul 7, 4:17 PM CDTSevere Thunderstorm WarningOAXCedar63 min
Jul 7, 4:28 PM CDTSevere Thunderstorm WarningOAXAntelope62 min
Jul 7, 4:34 PM CDTSevere Thunderstorm WarningOAXKnox31 min
Jul 7, 5:06 PM CDTTornado WarningOAXPierce49 min
Jul 7, 5:20 PM CDTSevere Thunderstorm WarningOAXCedar50 min
Jul 7, 5:58 PM CDTSevere Thunderstorm WarningOAXWayne62 min
Jul 7, 6:03 PM CDTSevere Thunderstorm WarningOAXPierce47 min
Jul 7, 6:11 PM CDTTornado WarningOAXMadison49 min
Jul 7, 6:11 PM CDTTornado WarningOAXStanton64 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1997Every severe thunderstorm warning in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.