Alert archive / Nebraska / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 182, NWS Omaha, NE

July 12, 2007Platte County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 12, 2007, 2:13 PM CDT for Platte County, Nebraska. It was in force for 62 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: Jul 12, 2007, 2:13 PM CDT (19:13 UTC)
Expired: Jul 12, 2007, 3:15 PM CDT
In force: 62 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Platte County, NE

The radar

The Omaha radar (KOAX), 100 km from the middle of the area, began a volume at 19:15 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 12:00Z, 7.2 hours before the alert went out and 262 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: 213 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1092 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Jul 12, 12:44 PM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jul 12, 12:44 PM CDT, 1 hour 29 minutes before

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Hazardous weather outlook, Jul 12, 11:50 AM CDT, 2 hours 23 minutes before

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In the hours before

Local storm report, Jul 12, 11:27 AM CDT, 2 hours 46 minutes before

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Local storm report, Jul 12, 1:23 PM CDT, 50 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
Jul 12, 11:12 AM CDT	Severe Thunderstorm Warning	OAX	Wayne	48 min
Jul 12, 12:55 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	50 min
Jul 12, 1:35 PM CDT	Severe Thunderstorm Warning	OAX	Madison	40 min
Jul 12, 1:54 PM CDT	Severe Thunderstorm Warning	OAX	Boone	36 min
Jul 12, 2:50 PM CDT	Severe Thunderstorm Warning	OAX	Saunders	55 min
Jul 12, 3:39 PM CDT	Severe Thunderstorm Warning	OAX	Butler	36 min
Jul 12, 3:58 PM CDT	Severe Thunderstorm Warning	OAX	Seward	62 min
Jul 12, 6:09 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson	36 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; radar from the NEXRAD Level II archive.