Alert archive / Ohio / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 8, NWS Wilmington, OH

February 11, 1999Montgomery County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Feb 11, 1999, 11:22 PM EST for Montgomery County, Ohio. It was in force for 48 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
Feb 11, 1999, 11:22 PM EST (04:22 UTC)
Expired
Feb 12, 1999, 12:10 AM EST
In force
48 min
Issued by
NWS Wilmington, OH
Area
Whole counties

County Montgomery County, OH

The radar

The Cincinnati radar (KILN), 55 km from the middle of the area, began a volume at 04:24 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 11, 9:00 PM ESTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.4 hours before the alert went out and 55 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, Cncnati-Daytn, OH at 00:00Z on 1999-02-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 110 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, Cncnati-Daytn, OH at 00:00Z on 1999-02-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 321 square meters per square second.1939587897Sfc1 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
110 J/kg
Mixed-layer CIN
-166 J/kg
Mixed-layer LCL
1175 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
321 m²/s²
0-3 km storm-relative helicity
467 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Wilmington, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 11, 10:41 PM ESTSevere Thunderstorm WarningILNDarke, Preble49 min
Feb 11, 11:11 PM ESTSevere Thunderstorm WarningILNMiami, Shelby49 min
Feb 11, 11:33 PM ESTSevere Thunderstorm WarningILNChampaign42 min
Feb 11, 11:33 PM ESTSevere Thunderstorm WarningILNClark, Greene42 min
Feb 11, 9:47 PM ESTSevere Thunderstorm WarningILNFayette, Wayne28 min
Feb 11, 10:09 PM ESTSevere Thunderstorm WarningILNFranklin26 min
Feb 11, 10:17 PM ESTSevere Thunderstorm WarningILNFayette, Union, Wayne48 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1999Every severe thunderstorm 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.