Alert archive / Nebraska / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 155, NWS Omaha, NE

July 31, 2015Boone County, Madison County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 31, 2015, 2:13 PM CDT for Boone County, Madison County, Nebraska. It was in force for 32 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 31, 2015, 2:13 PM CDT (19:13 UTC)
Expired: Jul 31, 2015, 2:45 PM CDT
In force: 32 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Boone County, NE, Madison County, NE

The radar

The Omaha radar (KOAX), 134 km from the middle of the area, began a volume at 19:16 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, 7.2 hours before the alert went out and 134 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: 520 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1401 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

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 31, 1:01 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Jul 31, 1:01 PM CDT, 1 hour 12 minutes before

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Hazardous weather outlook, Jul 31, 11:12 AM CDT, 3 hours 1 minute before

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In the hours before

Local storm report, Jul 31, 8:54 AM CDT, 5 hours 19 minutes before

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Special weather statement, Jul 31, 2:11 PM CDT, 2 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 31, 5:00 AM CDT	Special Weather Statement	OAX	Sarpy	45 min
Jul 31, 2:11 PM CDT	Special Weather Statement	OAX	Boone	49 min
Jul 31, 2:41 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Platte	49 min
Jul 31, 3:49 PM CDT	Special Weather Statement	OAX	Platte	26 min
Jul 31, 3:50 PM CDT	Special Weather Statement	OAX	Colfax	25 min
Jul 31, 4:06 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Madison, Platte, Stanton	39 min
Jul 31, 4:23 PM CDT	Special Weather Statement	OAX	Boone	37 min
Jul 31, 4:51 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Dodge, Stanton	39 min
Jul 31, 5:26 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Dodge	49 min
Jul 31, 5:34 PM CDT	Special Weather Statement	OAX	Saline	41 min
Jul 31, 6:03 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Dodge, Washington	42 min
Jul 31, 6:08 PM CDT	Special Weather Statement	OAX	Saline	52 min
Jul 31, 6:52 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Lancaster, Otoe	38 min
Jul 31, 4:39 PM CDT	Special Weather Statement	OAX	Mills	51 min
Jul 31, 5:53 PM CDT	Special Weather Statement	OAX	Montgomery	67 min
Jul 31, 6:45 PM CDT	Special Weather Statement	OAX	Harrison	60 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2015 Every severe thunderstorm warning in 2015

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.