Alert archive / Nebraska / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 366, NWS Omaha, NE

August 18, 2026Gage County, Lancaster County, Saline County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Aug 18, 2026, 3:49 AM CDT for Gage County, Lancaster County, Saline County, Nebraska. It was in force for 41 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 18, 2026, 3:49 AM CDT (08:49 UTC)
Expired: Aug 18, 2026, 4:30 AM CDT
In force: 41 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Gage County, NE, Lancaster County, NE, Saline County, NE

The radar

The Omaha radar (KOAX), 97 km from the middle of the area, began a volume at 08:48 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 17, 8:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 8.8 hours before the alert went out and 324 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: 2080 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 2076 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 18, 12:50 AM CDT, 2 hours 59 minutes earlier.

Area forecast discussion, Aug 18, 12:50 AM CDT, 2 hours 59 minutes before

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In the hours before

Local storm report, Aug 18, 2:08 AM CDT, 1 hour 41 minutes before

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Local storm report, Aug 18, 2:19 AM CDT, 1 hour 30 minutes before

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Local storm report, Aug 18, 2:21 AM CDT, 1 hour 28 minutes before

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Local storm report, Aug 18, 2:22 AM CDT, 1 hour 27 minutes before

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Local storm report, Aug 18, 2:24 AM CDT, 1 hour 25 minutes before

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Local storm report, Aug 18, 2:31 AM CDT, 1 hour 18 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 17, 8:23 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Antelope, Knox	24 min
Aug 17, 10:56 PM CDT	Severe Thunderstorm Warning	OAX	Boone	49 min
Aug 17, 11:40 PM CDT	Severe Thunderstorm Warning	OAX	Boone	24 min
Aug 18, 12:39 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Platte	36 min
Aug 18, 1:31 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Butler, Seward	44 min
Aug 18, 1:39 AM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	51 min
Aug 18, 1:59 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saunders	61 min
Aug 18, 2:25 AM CDT	Severe Thunderstorm Warning	OAX	Gage	50 min
Aug 18, 2:30 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Johnson, Nemaha, Otoe	60 min
Aug 18, 3:18 AM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	42 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2026 Every severe thunderstorm warning in 2026

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.