Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 45, NWS Omaha, NE

May 27, 20194 counties in Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at May 27, 2019, 12:14 AM CDT for 4 counties in Nebraska. It was in force for 61 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 27, 2019, 12:14 AM CDT (05:14 UTC)
Expired: May 27, 2019, 1:15 AM CDT
In force: 61 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

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

The radar

The Sioux Falls radar (KFSD), 152 km from the middle of the area, began a volume at 05:13 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 00:00Z, 5.2 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: 364 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1557 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

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 May 26, 11:49 PM CDT, 25 minutes earlier.

Area forecast discussion, May 26, 11:49 PM CDT, 25 minutes before

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Hazardous weather outlook, May 26, 8:29 PM CDT, 3 hours 45 minutes before

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In the hours before

Local storm report, May 27, 12:02 AM CDT, 12 minutes before

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Special weather statement, May 27, 12:02 AM CDT, 12 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 27, 12:02 AM CDT	Special Weather Statement	OAX	Antelope	28 min
May 27, 6:41 AM CDT	River Flood Warning	OAX	Seward	6 days
May 27, 10:31 AM CDT	River Flood Warning	OAX	Washington	18 days
May 27, 11:39 AM CDT	River Flood Warning	OAX	Saunders	9 hr
May 27, 1:09 PM CDT	Areal Flood Warning	OAX	Colfax, Madison, Platte, Stanton	4 hr
May 27, 1:50 PM CDT	River Flood Warning	OAX	Saunders	4 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.