Alert archive / Nebraska / Flash Flood Warnings in 1999

Flash Flood Warning 18, NWS Omaha, NE

June 10, 1999Cedar County, Knox County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jun 10, 1999, 2:56 AM CDT for Cedar County, Knox County, Nebraska. It was in force for 5 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
Jun 10, 1999, 2:56 AM CDT (07:56 UTC)
Expired
Jun 10, 1999, 7:55 AM CDT
In force
5 hr
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Cedar County, NE, Knox County, NE

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 7.9 hours before the alert went out and 175 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 00:00Z on 1999-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1592 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 00:00Z on 1999-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.1939Sfc1 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
1592 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1308 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
145 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 7:30 PM CDTSevere Thunderstorm WarningOAXButler, Seward65 min
Jun 9, 8:33 PM CDTSevere Thunderstorm WarningOAXDodge, Saunders62 min
Jun 9, 8:35 PM CDTSevere Thunderstorm WarningOAXButler35 min
Jun 9, 9:06 PM CDTSevere Thunderstorm WarningOAXSeward64 min
Jun 9, 9:20 PM CDTSevere Thunderstorm WarningOAXGage, Lancaster, Saline60 min
Jun 9, 9:58 PM CDTSevere Thunderstorm WarningOAXSaunders62 min
Jun 9, 10:09 PM CDTSevere Thunderstorm WarningOAXSaline, Seward61 min
Jun 9, 10:20 PM CDTSevere Thunderstorm WarningOAXMadison, Platte45 min
Jun 9, 10:49 PM CDTFlash Flood WarningOAXButler, Saunders, Seward6 hr
Jun 10, 7:53 AM CDTFlash Flood WarningOAXCedar3 hr

Nearby

Flash Flood Warnings in Nebraska, 1999Every flash flood warning in 1999

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.