Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 40, NWS Omaha, NE

May 23, 2019Jefferson County, Saline County, Seward County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at May 23, 2019, 3:08 PM CDT for Jefferson County, Saline County, Seward County, Nebraska. It was in force for 34 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: May 23, 2019, 3:08 PM CDT (20:08 UTC)
Expired: May 23, 2019, 3:42 PM CDT
In force: 34 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Jefferson County, NE, Saline County, NE, Seward County, NE

The radar

The Omaha radar (KOAX), 110 km from the middle of the area, began a volume at 20:11 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

Topeka, KS (KFOE), launched 12:00Z, 8.1 hours before the alert went out and 213 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: 1804 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 23, 12:13 PM CDT, 2 hours 55 minutes earlier.

Area forecast discussion, May 23, 12:13 PM CDT, 2 hours 55 minutes before

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Hazardous weather outlook, May 23, 11:36 AM CDT, 3 hours 32 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
May 23, 4:17 PM CDT	Flash Flood Watch	OAX	Gage, Jefferson, Johnson, Nemaha, Otoe, Pawnee and 1 more	29 hr

Nearby

Severe Thunderstorm Warnings in Nebraska, 2019 Every severe thunderstorm warning in 2019

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.