Alert archive / Nebraska / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 215, NWS Omaha, NE

August 6, 2007Washington County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Aug 6, 2007, 9:08 PM CDT for Washington County, Nebraska. It was in force for 25 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: Aug 6, 2007, 9:08 PM CDT (02:08 UTC)
Expired: Aug 6, 2007, 9:33 PM CDT
In force: 25 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Washington County, NE

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.1 hours before the alert went out and 27 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: 2407 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 362 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 22.6

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 6, 3:45 PM CDT, 5 hours 23 minutes earlier.

Area forecast discussion, Aug 6, 3:45 PM CDT, 5 hours 23 minutes before

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Hazardous weather outlook, Aug 6, 5:02 PM CDT, 4 hours 6 minutes before

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In the hours before

Local storm report, Aug 6, 3:50 PM CDT, 5 hours 18 minutes before

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Local storm report, Aug 6, 3:57 PM CDT, 5 hours 11 minutes before

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Local storm report, Aug 6, 7:03 PM CDT, 2 hours 5 minutes before

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Local storm report, Aug 6, 7:19 PM CDT, 1 hour 49 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 10:24 PM CDT	Flash Flood Watch	OAX	Butler, Cass, Dodge, Douglas, Sarpy, Saunders and 1 more	6 hr
Aug 7, 8:00 AM CDT	River Flood Warning	OAX	Butler	4 days
Aug 7, 4:23 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha	67 min
Aug 7, 4:55 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	35 min
Aug 7, 5:27 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	33 min
Aug 6, 9:54 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	25 min
Aug 7, 5:09 PM CDT	Severe Thunderstorm Warning	OAX	Page	51 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2007 Every severe thunderstorm warning in 2007

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.