Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 383, NWS North Platte, NE

August 9, 2009Lincoln County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 9, 2009, 4:02 AM CDT for Lincoln 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: Aug 9, 2009, 4:02 AM CDT (09:02 UTC)
Expired: Aug 9, 2009, 4:36 AM CDT
In force: 34 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Lincoln County, NE

The radar

The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 09:05 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 9.0 hours before the alert went out and 15 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: 383 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1677 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -1.8

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 North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 9, 3:09 AM CDT, 53 minutes earlier.

Area forecast discussion, Aug 9, 3:09 AM CDT, 53 minutes before

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Hazardous weather outlook, Aug 9, 12:44 AM CDT, 3 hours 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 10:56 PM CDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	49 min
Aug 8, 11:35 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Deuel, Garden, Keith	40 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2009 Every severe thunderstorm warning in 2009

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.