Alert archive / Nebraska / Flash Flood Warnings in 1999

Flash Flood Warning 7, NWS Omaha, NE

May 30, 1999Gage County, Jefferson County, Saline County, Nebraska

NWS Omaha, NE issued this flash flood warning at May 30, 1999, 4:57 PM CDT for Gage County, Jefferson County, Saline 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
May 30, 1999, 4:57 PM CDT (21:57 UTC)
Expired
May 30, 1999, 8:00 PM CDT
In force
3 hr
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Gage County, NE, Jefferson County, NE, Saline County, NE

The radar

The Omaha radar (KOAX), 123 km from the middle of the area, began a volume at 21:58 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, 10.0 hours before the alert went out and 123 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 1999-05-30Temperature 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 1999-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -48 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1186 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-48 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
May 30, 1:52 PM CDTSevere Thunderstorm WarningOAXLancaster33 min
May 30, 1:59 PM CDTSevere Thunderstorm WarningOAXGage31 min
May 30, 2:20 PM CDTSevere Thunderstorm WarningOAXCass, Lancaster, Saunders50 min
May 30, 2:33 PM CDTSevere Thunderstorm WarningOAXGage47 min
May 30, 2:59 PM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy46 min
May 30, 3:38 PM CDTSevere Thunderstorm WarningOAXJefferson, Saline47 min
May 30, 4:31 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson49 min
May 30, 4:40 PM CDTTornado WarningOAXJefferson35 min
May 30, 5:18 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson47 min
May 30, 6:04 PM CDTSevere Thunderstorm WarningOAXJefferson51 min
May 30, 6:06 PM CDTSevere Thunderstorm WarningOAXPawnee49 min
May 30, 6:57 PM CDTFlash Flood WarningOAXPawnee3 hr
May 30, 5:45 PM CDTFlash Flood WarningOAXPage3 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; radar from the NEXRAD Level II archive.