Alert archive / Nebraska / Flash Flood Warnings in 2023

Flash Flood Warning 11, NWS Omaha, NE

July 10, 2023Antelope County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jul 10, 2023, 6:31 PM CDT for Antelope County, Nebraska. It was in force for 3 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
Jul 10, 2023, 6:31 PM CDT (23:31 UTC)
Expired
Jul 10, 2023, 9:15 PM CDT
In force
3 hr
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Flood severity
None

County Antelope County, NE

The radar

The Omaha radar (KOAX), 170 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 170 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2023-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2023-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1397 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 3:09 PM CDTSevere Thunderstorm WarningOAXCedar, Knox51 min
Jul 10, 3:15 PM CDTSevere Thunderstorm WarningOAXKnox45 min
Jul 10, 3:53 PM CDTSevere Thunderstorm WarningOAXCedar, Knox52 min
Jul 10, 3:56 PM CDTSevere Thunderstorm WarningOAXKnox49 min
Jul 10, 4:35 PM CDTSevere Thunderstorm Warning Considerable damage threatOAXAntelope, Knox, Pierce40 min
Jul 10, 4:39 PM CDTSevere Thunderstorm Warning Considerable damage threatOAXCedar, Knox, Pierce, Wayne51 min
Jul 10, 5:07 PM CDTSevere Thunderstorm WarningOAXAntelope, Knox, Pierce38 min
Jul 10, 5:16 PM CDTSevere Thunderstorm WarningOAXCedar, Pierce, Stanton, Wayne29 min
Jul 10, 5:38 PM CDTSevere Thunderstorm WarningOAXAntelope, Madison, Pierce, Stanton, Wayne52 min
Jul 10, 5:58 PM CDTSevere Thunderstorm WarningOAXAntelope, Boone, Madison47 min
Jul 10, 6:07 PM CDTAreal Flood AdvisoryOAXAntelope24 min
Jul 10, 6:17 PM CDTSevere Thunderstorm WarningOAXColfax, Madison, Pierce, Platte, Stanton43 min
Jul 10, 6:41 PM CDTSevere Thunderstorm WarningOAXAntelope, Boone, Madison, Platte49 min

Nearby

Flash Flood Warnings in Nebraska, 2023Every flash flood 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.