Alert archive / Nebraska / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 20, NWS Omaha, NE

April 27, 2014Madison County, Platte County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Apr 27, 2014, 6:31 PM CDT for Madison County, Platte County, Nebraska. It was in force for 29 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 27, 2014, 6:31 PM CDT (23:31 UTC)
Expired: Apr 27, 2014, 7:00 PM CDT
In force: 29 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Madison County, NE, Platte County, NE

The radar

The Omaha radar (KOAX), 110 km from the middle of the area, began a volume at 23:34 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 12:00Z, 11.5 hours before the alert went out and 110 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: 406 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 368 m²/s²
0-3 km storm-relative helicity: 415 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.7

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 27, 6:22 PM CDT, 9 minutes earlier.

Area forecast discussion, Apr 27, 6:22 PM CDT, 9 minutes before

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Hazardous weather outlook, Apr 27, 5:31 PM CDT, 1 hour before

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In the hours before

Local storm report, Apr 27, 1:45 PM CDT, 4 hours 46 minutes before

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Local storm report, Apr 27, 2:05 PM CDT, 4 hours 26 minutes before

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Special weather statement, Apr 27, 4:11 PM CDT, 2 hours 20 minutes before

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Local storm report, Apr 27, 4:37 PM CDT, 1 hour 54 minutes before

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Special weather statement, Apr 27, 5:40 PM CDT, 51 minutes before

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Special weather statement, Apr 27, 6:20 PM CDT, 11 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 27, 5:51 AM CDT	Special Weather Statement	OAX	Johnson, Otoe	39 min
Apr 27, 6:12 AM CDT	Special Weather Statement	OAX	Gage	48 min
Apr 27, 6:26 AM CDT	Special Weather Statement	OAX	Gage	49 min
Apr 27, 7:18 AM CDT	Special Weather Statement	OAX	Lancaster	42 min
Apr 27, 9:29 AM CDT	Special Weather Statement	OAX	Johnson, Nemaha, Pawnee, Richardson	31 min
Apr 27, 9:57 AM CDT	Special Weather Statement	OAX	Nemaha	48 min
Apr 27, 4:11 PM CDT	Special Weather Statement	OAX	Saline	19 min
Apr 27, 5:40 PM CDT	Special Weather Statement	OAX	Platte	35 min
Apr 27, 6:20 PM CDT	Special Weather Statement	OAX	Madison	25 min
Apr 27, 6:56 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Stanton, Wayne	49 min
Apr 27, 10:16 AM CDT	Special Weather Statement	OAX	Mills	29 min
Apr 27, 10:39 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	36 min
Apr 27, 11:47 AM CDT	Special Weather Statement	OAX	Montgomery, Page	13 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2014 Every severe thunderstorm warning in 2014

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.