Alert archive / Nebraska / Red Flag Warnings in 2022

Red Flag Warning 18, NWS Omaha, NE

April 23, 202222 counties in Nebraska; Monona County, Iowa

NWS Omaha, NE issued this red flag warning at Apr 23, 2022, 2:23 AM CDT for 22 counties in Nebraska; Monona County, Iowa. It took effect at Apr 23, 2022, 1:00 PM CDT. It was in force for 7 hr. 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 23, 2022, 2:23 AM CDT (07:23 UTC)
In effect from: Apr 23, 2022, 1:00 PM CDT
Expired: Apr 23, 2022, 8:00 PM CDT
In force: 7 hr
Issued by: NWS Omaha, NE

All 23 counties

Monona County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Gage County, NE, Jefferson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 66 km from the middle of the area, began a volume at 07:26 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, 7.4 hours before the alert went out and 65 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: 660 J/kg
Mixed-layer CIN: -298 J/kg
Mixed-layer LCL: 1494 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag 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 red flag warning went out at Apr 22, 11:33 PM CDT, 2 hours 50 minutes earlier.

Area forecast discussion, Apr 22, 11:33 PM CDT, 2 hours 50 minutes before

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Hazardous weather outlook, Apr 22, 4:01 PM CDT, 10 hours 22 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 23, 5:01 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Douglas, Sarpy, Washington	29 min
Apr 23, 5:12 AM CDT	Severe Thunderstorm Warning	OAX	Douglas, Washington	33 min
Apr 23, 10:19 AM CDT	High Wind Warning	OAX	Antelope, Boone, Burt, Butler, Cass, Cedar and 16 more	9 hr
Apr 23, 5:27 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	33 min
Apr 23, 5:33 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	27 min
Apr 23, 5:58 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie, Shelby	17 min
Apr 23, 4:42 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	33 min
Apr 23, 4:45 PM CDT	Tornado Warning	OAX	Montgomery	13 min

Nearby

Red Flag Warnings in Nebraska, 2022 Red Flag Warnings in Iowa, 2022 Every red flag warning in 2022

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.