Alert archive / Nebraska / Red Flag Warnings in 2023

Red Flag Warning 8, NWS Omaha, NE

April 15, 202321 counties in Nebraska; Monona County, Iowa

NWS Omaha, NE issued this red flag warning at Apr 15, 2023, 2:39 PM CDT for 21 counties in Nebraska; Monona County, Iowa. It took effect at Apr 16, 2023, 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 15, 2023, 2:39 PM CDT (19:39 UTC)
In effect from: Apr 16, 2023, 1:00 PM CDT
Expired: Apr 16, 2023, 8:00 PM CDT
In force: 7 hr
Issued by: NWS Omaha, NE

All 22 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, Wayne County, NE

The radar

The Omaha radar (KOAX), 69 km from the middle of the area, began a volume at 19:40 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, 7.7 hours before the alert went out and 68 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: 753 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 74 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 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 15, 12:33 PM CDT, 2 hours 6 minutes earlier.

Area forecast discussion, Apr 15, 12:33 PM CDT, 2 hours 6 minutes before

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Hazardous weather outlook, Apr 15, 11:40 AM CDT, 2 hours 59 minutes before

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In the hours before

Local storm report, Apr 15, 9:03 AM CDT, 5 hours 36 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 14, 7:05 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe, Pawnee	55 min
Apr 14, 7:24 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	54 min
Apr 14, 7:26 PM CDT	Flash Flood Warning	OAX	Douglas, Sarpy	3 hr
Apr 14, 7:27 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	63 min
Apr 14, 7:39 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	30 min
Apr 14, 7:44 PM CDT	Flash Flood Warning	OAX	Cass, Lancaster, Otoe, Sarpy	3 hr
Apr 14, 7:54 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Pawnee	47 min
Apr 14, 8:01 PM CDT	Severe Thunderstorm Warning	OAX	Sarpy	59 min
Apr 14, 8:30 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Otoe	47 min
Apr 14, 8:52 PM CDT	Flash Flood Warning	OAX	Sarpy	3 hr
Apr 14, 8:52 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe	41 min
Apr 14, 9:14 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	61 min
Apr 15, 2:40 PM CDT	Wind Advisory	OAX	Antelope, Boone, Burt, Butler, Cass, Cedar and 24 more	28 hr
Apr 14, 8:32 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	58 min
Apr 14, 8:36 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	54 min
Apr 14, 9:41 PM CDT	Special Weather Statement	OAX	Page	49 min
Apr 14, 9:51 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Page, Pottawattamie	54 min
Apr 14, 10:44 PM CDT	Special Weather Statement	OAX	Fremont	16 min
Apr 14, 11:00 PM CDT	Special Weather Statement	OAX	Mills	15 min

Nearby

Red Flag Warnings in Nebraska, 2023 Red Flag Warnings in Iowa, 2023 Every red flag warning in 2023

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.