Alert archive / Nebraska / Flash Flood Warnings in 2013

Flash Flood Warning 20, NWS Omaha, NE

October 2, 2013Antelope County, Nebraska

NWS Omaha, NE issued this flash flood warning at Oct 2, 2013, 6:59 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
Oct 2, 2013, 6:59 PM CDT (23:59 UTC)
Expired
Oct 2, 2013, 10:00 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 00:03 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, 12.0 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 2013-10-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 606 joules per kilogram.LCLLFCEL10008507005003002001001 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 2013-10-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
606 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
819 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 2, 3:09 PM CDTSpecial Weather StatementOAXAntelope, Boone, Cedar, Madison, Pierce, Wayne51 min
Oct 2, 4:06 PM CDTSevere Thunderstorm WarningOAXAntelope, Madison, Pierce24 min
Oct 2, 4:20 PM CDTSevere Thunderstorm WarningOAXAntelope, Knox, Pierce25 min
Oct 2, 4:28 PM CDTSevere Thunderstorm WarningOAXAntelope, Madison, Pierce32 min
Oct 2, 4:35 PM CDTSevere Thunderstorm WarningOAXWayne25 min
Oct 2, 4:44 PM CDTSevere Thunderstorm WarningOAXKnox, Pierce31 min
Oct 2, 4:45 PM CDTSpecial Weather StatementOAXBoone30 min
Oct 2, 4:51 PM CDTSevere Thunderstorm WarningOAXAntelope39 min
Oct 2, 5:31 PM CDTSevere Thunderstorm WarningOAXAntelope, Madison, Pierce44 min
Oct 2, 5:43 PM CDTSpecial Weather StatementOAXKnox32 min
Oct 2, 5:47 PM CDTAreal Flood AdvisoryOAXAntelope, Boone, Madison, Pierce118 min
Oct 2, 6:08 PM CDTSpecial Weather StatementOAXKnox37 min

Nearby

Flash Flood Warnings in Nebraska, 2013Every flash flood warning in 2013

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.