Alert archive / Nebraska / Areal Flood Warnings in 2021

Areal Flood Warning 14, NWS Omaha, NE

August 31, 202113 counties in Nebraska

NWS Omaha, NE issued this areal flood warning at Aug 31, 2021, 5:41 AM CDT for 13 counties in Nebraska. It was in force for 9 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: Aug 31, 2021, 5:41 AM CDT (10:41 UTC)
Expired: Aug 31, 2021, 2:45 PM CDT
In force: 9 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

Counties Antelope County, NE, Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 99 km from the middle of the area, began a volume at 10:45 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, 10.7 hours before the alert went out and 99 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: 1443 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1305 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood 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 areal flood warning went out at Aug 31, 3:29 AM CDT, 2 hours 12 minutes earlier.

Area forecast discussion, Aug 31, 3:29 AM CDT, 2 hours 12 minutes before

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Hazardous weather outlook, Aug 31, 4:14 AM CDT, 1 hour 27 minutes before

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In the hours before

Local storm report, Aug 31, 2:42 AM CDT, 2 hours 59 minutes before

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Special weather statement, Aug 31, 3:18 AM CDT, 2 hours 23 minutes before

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Local storm report, Aug 31, 4:38 AM CDT, 1 hour 3 minutes before

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Special weather statement, Aug 31, 5:02 AM CDT, 39 minutes before

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Special weather statement, Aug 31, 5:26 AM CDT, 15 minutes before

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Local storm report, Aug 31, 5:35 AM CDT, 6 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 30, 10:29 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox, Pierce, Wayne	46 min
Aug 30, 10:31 PM CDT	Severe Thunderstorm Warning	OAX	Wayne	44 min
Aug 30, 10:54 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	39 min
Aug 30, 11:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Cuming, Stanton, Wayne	44 min
Aug 30, 11:06 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	Pierce, Wayne	54 min
Aug 30, 11:22 PM CDT	Special Weather Statement	OAX	Pierce	23 min
Aug 30, 11:35 PM CDT	Severe Thunderstorm Warning	OAX	Knox	40 min
Aug 30, 11:42 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Stanton, Wayne	48 min
Aug 30, 11:54 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Stanton, Wayne	24 min
Aug 31, 12:00 AM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Dodge, Stanton	45 min
Aug 31, 12:04 AM CDT	Areal Flood Advisory	OAX	Cedar, Cuming, Knox, Pierce, Stanton, Thurston and 1 more	6 hr
Aug 31, 12:09 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	36 min
Aug 31, 12:15 AM CDT	Severe Thunderstorm Warning	OAX	Washington	26 min
Aug 31, 12:25 AM CDT	Areal Flood Advisory	OAX	Burt, Washington	5 hr
Aug 31, 12:31 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Dodge, Saunders, Washington	29 min
Aug 31, 12:47 AM CDT	Areal Flood Advisory	OAX	Knox	5 hr
Aug 31, 12:53 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Dodge, Douglas, Saunders, Washington	37 min
Aug 31, 1:19 AM CDT	Areal Flood Advisory	OAX	Burt, Washington	4 hr
Aug 31, 1:22 AM CDT	Areal Flood Advisory	OAX	Burt, Colfax, Cuming, Dodge, Stanton, Thurston and 1 more	6 hr
Aug 31, 1:22 AM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders, Washington	23 min
Aug 31, 1:35 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Douglas, Sarpy, Saunders	25 min
Aug 31, 1:36 AM CDT	Flash Flood Warning	OAX	Antelope, Knox, Pierce	4 hr
Aug 31, 1:46 AM CDT	Areal Flood Advisory	OAX	Dodge, Douglas, Sarpy, Washington	5 hr
Aug 31, 1:56 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Sarpy, Saunders	34 min
Aug 31, 2:14 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	31 min
Aug 31, 3:18 AM CDT	Special Weather Statement	OAX	Antelope	27 min
Aug 31, 5:02 AM CDT	Special Weather Statement	OAX	Butler	28 min
Aug 31, 5:26 AM CDT	Special Weather Statement	OAX	Butler	34 min
Aug 31, 5:35 AM CDT	Areal Flood Advisory	OAX	Butler, Cass, Colfax, Dodge, Douglas, Lancaster and 4 more	77 min
Aug 31, 5:56 AM CDT	Special Weather Statement	OAX	Seward	34 min
Aug 31, 6:18 AM CDT	Special Weather Statement	OAX	Cass, Lancaster, Otoe, Saline	27 min
Aug 31, 6:28 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Gage, Johnson, Lancaster, Nemaha, Otoe and 1 more	47 min
Aug 31, 6:43 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Johnson, Lancaster, Pawnee, Saline	32 min
Aug 31, 7:12 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Johnson, Nemaha, Otoe, Pawnee and 1 more	48 min
Aug 31, 7:58 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Johnson, Nemaha, Pawnee, Richardson	10 min
Aug 30, 10:25 PM CDT	Special Weather Statement	OAX	Monona	35 min
Aug 30, 10:49 PM CDT	Severe Thunderstorm Warning	OAX	Monona	26 min
Aug 31, 2:09 AM CDT	Areal Flood Advisory	OAX	Pottawattamie	3 hr

Nearby

Areal Flood Warnings in Nebraska, 2021 Every areal flood warning in 2021

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.