Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 18, NWS Omaha, NE

June 13, 1991Jefferson County, Nebraska

NWS Omaha, NE issued this tornado warning at Jun 13, 1991, 9:10 PM CDT for Jefferson County, Nebraska. It was in force for 35 min.

The area

The counties it named.

The facts

Issued: Jun 13, 1991, 9:10 PM CDT (02:10 UTC)
Expired: Jun 13, 1991, 9:45 PM CDT
In force: 35 min
Issued by: NWS Omaha, NE
Area: Whole counties

County Jefferson County, NE

The nearest sounding before it

Omaha, NE (KOVN), launched 00:00Z, 2.2 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-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: 1980 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1429 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 309 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 9.6

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.

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 13, 7:21 PM CDT, 1 hour 49 minutes before

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Special weather statement, Jun 13, 8:19 PM CDT, 51 minutes before

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Special weather statement, Jun 13, 8:52 PM CDT, 18 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 8:47 PM CDT	Severe Thunderstorm Warning	OAX	Butler	58 min
Jun 13, 10:00 PM CDT	Severe Thunderstorm Warning	OAX	Seward	30 min
Jun 13, 10:08 PM CDT	Severe Thunderstorm Warning	OAX	Cass	67 min
Jun 13, 10:27 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Sarpy	45 min
Jun 13, 11:11 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	49 min
Jun 13, 11:40 PM CDT	Flash Flood Warning	OAX	Dodge, Washington	4 hr
Jun 13, 11:40 PM CDT	Flash Flood Warning	OAX	Saunders	4 hr
Jun 14, 12:12 AM CDT	Severe Thunderstorm Warning	OAX	Douglas	48 min
Jun 14, 12:27 AM CDT	Severe Thunderstorm Warning	OAX	Douglas	78 min
Jun 14, 1:27 AM CDT	Flash Flood Warning	OAX	Douglas	4 hr

Nearby

Tornado Warnings in Nebraska, 1991 Every tornado warning in 1991 Tornadoes in 1991

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.