Alert archive / Nebraska / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 317, NWS Omaha, NE

August 9, 2005Knox County, Pierce County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Aug 9, 2005, 2:37 PM CDT for Knox County, Pierce County, Nebraska. It was in force for 38 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 9, 2005, 2:37 PM CDT (19:37 UTC)
Expired: Aug 9, 2005, 3:15 PM CDT
In force: 38 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

Counties Knox County, NE, Pierce County, NE

The radar

The Sioux Falls radar (KFSD), 151 km from the middle of the area, began a volume at 19:36 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 9, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.6 hours before the alert went out and 170 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: 671 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1805 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 9, 3:20 AM CDT, 11 hours 17 minutes earlier.

Area forecast discussion, Aug 9, 3:20 AM CDT, 11 hours 17 minutes before

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Hazardous weather outlook, Aug 9, 11:22 AM CDT, 3 hours 15 minutes before

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In the hours before

Special weather statement, Aug 9, 2:22 PM CDT, 15 minutes before

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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 9, 2:10 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	50 min
Aug 9, 3:11 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	40 min
Aug 9, 3:16 PM CDT	Severe Thunderstorm Warning	OAX	Pierce	21 min
Aug 9, 4:13 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	29 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2005 Every severe thunderstorm warning in 2005

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.