Alert archive / Nebraska / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 164, NWS Omaha, NE

August 1, 2013Cedar County, Knox County, Pierce County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Aug 1, 2013, 2:30 PM CDT for Cedar County, Knox County, Pierce County, Nebraska. It was in force for 45 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 1, 2013, 2:30 PM CDT (19:30 UTC)
Expired: Aug 1, 2013, 3:15 PM CDT
In force: 45 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cedar County, NE, Knox County, NE, Pierce County, NE

The radar

The Sioux Falls radar (KFSD), 139 km from the middle of the area, began a volume at 19:31 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 1, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.5 hours before the alert went out and 165 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: 580 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 1, 12:39 PM CDT, 1 hour 51 minutes earlier.

Area forecast discussion, Aug 1, 12:39 PM CDT, 1 hour 51 minutes before

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Hazardous weather outlook, Aug 1, 11:57 AM CDT, 2 hours 33 minutes before

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In the hours before

Special weather statement, Aug 1, 10:16 AM CDT, 4 hours 14 minutes before

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Special weather statement, Aug 1, 11:09 AM CDT, 3 hours 21 minutes before

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Special weather statement, Aug 1, 1:45 PM CDT, 45 minutes before

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Special weather statement, Aug 1, 2:15 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 1, 10:16 AM CDT	Special Weather Statement	OAX	Boone	44 min
Aug 1, 11:09 AM CDT	Special Weather Statement	OAX	Boone	36 min
Aug 1, 1:45 PM CDT	Special Weather Statement	OAX	Knox	45 min
Aug 1, 1:51 PM CDT	Severe Thunderstorm Warning	OAX	Knox	24 min
Aug 1, 2:15 PM CDT	Special Weather Statement	OAX	Knox	30 min
Aug 1, 2:59 PM CDT	Special Weather Statement	OAX	Knox	31 min
Aug 1, 3:12 PM CDT	Special Weather Statement	OAX	Wayne	33 min
Aug 1, 3:40 PM CDT	Special Weather Statement	OAX	Wayne	35 min
Aug 1, 4:17 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	43 min
Aug 1, 4:31 PM CDT	Special Weather Statement	OAX	Pierce	29 min
Aug 1, 4:58 PM CDT	Special Weather Statement	OAX	Madison, Stanton	32 min
Aug 1, 5:02 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Platte	28 min
Aug 1, 5:28 PM CDT	Severe Thunderstorm Warning	OAX	Boone	47 min
Aug 1, 5:35 PM CDT	Special Weather Statement	OAX	Colfax	40 min
Aug 1, 5:39 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Platte, Stanton	51 min
Aug 1, 6:03 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Dodge, Saunders	42 min
Aug 1, 6:15 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Platte	30 min
Aug 1, 6:27 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders, Washington	48 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.