Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 249, NWS Omaha, NE

July 5, 1998Dodge County, Saunders County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 5, 1998, 4:57 AM CDT for Dodge County, Saunders County, Nebraska. It was in force for 33 min. 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 5, 1998, 4:57 AM CDT (09:57 UTC)
Expired
Jul 5, 1998, 5:30 AM CDT
In force
33 min
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Dodge County, NE, Saunders County, NE

The radar

The Omaha radar (KOAX), 25 km from the middle of the area, began a volume at 09:57 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, 10.0 hours before the alert went out and 25 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 1998-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1706 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 1998-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.193958Sfc1 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
1706 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
848 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
171 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.3

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
Jul 4, 9:46 PM CDTSevere Thunderstorm WarningOAXGage59 min
Jul 5, 1:37 AM CDTFlash Flood WarningOAXRichardson4 hr
Jul 5, 3:53 AM CDTFlash Flood WarningOAXCuming, Dodge6 hr
Jul 5, 6:50 AM CDTFlash Flood WarningOAXDouglas4 hr
Jul 5, 6:58 AM CDTFlash Flood WarningOAXSarpy4 hr
Jul 5, 7:21 AM CDTFlash Flood WarningOAXWashington4 hr
Jul 5, 7:43 AM CDTFlash Flood WarningOAXCass4 hr
Jul 5, 6:40 AM CDTFlash Flood WarningOAXPottawattamie4 hr
Jul 5, 7:12 AM CDTFlash Flood WarningOAXHarrison4 hr

Nearby

Severe Thunderstorm Warnings in Nebraska, 1998Every severe thunderstorm warning in 1998

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.