Alert archive / Nebraska / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 27, NWS Omaha, NE

April 30, 2013Burt County, Cuming County, Dodge County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Apr 30, 2013, 9:45 PM CDT for Burt County, Cuming County, Dodge County, Nebraska. It was in force for 30 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: Apr 30, 2013, 9:45 PM CDT (02:45 UTC)
Expired: Apr 30, 2013, 10:15 PM CDT
In force: 30 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Burt County, NE, Cuming County, NE, Dodge County, NE

The radar

The Omaha radar (KOAX), 55 km from the middle of the area, began a volume at 02:45 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

Omaha, NE (KOAX), launched 00:00Z, 2.8 hours before the alert went out and 55 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2170 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 326 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.1

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 Apr 30, 7:15 PM CDT, 2 hours 30 minutes earlier.

Area forecast discussion, Apr 30, 7:15 PM CDT, 2 hours 30 minutes before

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Hazardous weather outlook, Apr 30, 5:56 PM CDT, 3 hours 49 minutes before

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In the hours before

Special weather statement, Apr 30, 9:16 PM CDT, 29 minutes before

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Special weather statement, Apr 30, 9:33 PM CDT, 12 minutes before

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Local storm report, Apr 30, 9:40 PM CDT, 5 minutes before

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Special weather statement, Apr 30, 9:41 PM CDT, 4 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
Apr 30, 9:33 PM CDT	Special Weather Statement	OAX	Cuming	27 min
Apr 30, 9:41 PM CDT	Special Weather Statement	OAX	Thurston, Wayne	34 min
Apr 30, 10:13 PM CDT	Special Weather Statement	OAX	Burt	32 min
Apr 30, 11:34 PM CDT	Special Weather Statement	OAX	Seward	26 min
May 1, 3:53 PM CDT	Winter Weather Advisory	OAX	Burt, Butler, Cass, Colfax, Cuming, Dodge and 13 more	18 hr
May 1, 5:23 PM CDT	Special Weather Statement	OAX	Cass, Jefferson, Lancaster, Otoe, Saline	37 min
Apr 30, 9:16 PM CDT	Special Weather Statement	OAX	Pottawattamie	29 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2013 Every severe thunderstorm warning in 2013

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.