Alert archive / Illinois / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 167, NWS Lincoln, IL

August 18, 1999Schuyler County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 18, 1999, 10:01 PM CDT for Schuyler County, Illinois. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 18, 1999, 10:01 PM CDT (03:01 UTC)
Expired
Aug 18, 1999, 10:45 PM CDT
In force
44 min
Issued by
NWS Lincoln, IL
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Schuyler County, IL

What was reported inside it

TimeReportWhereRemark
Aug 18, 10:35 PM CDTHail 2.75Rushville, ILHail up to baseball size fell, especially to the north and west of Rushville. Hundreds of cars were damaged by the hail. Numerous houses sustained roof damage and thousands of acres of corn and soybeans damaged.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.0 hours before the alert went out and 163 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, Davenport, at 00:00Z on 1999-08-19Temperature 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, Davenport, at 00:00Z on 1999-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 232 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
974 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
232 m²/s²
0-3 km storm-relative helicity
289 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 Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 18, 10:42 PM CDTSevere Thunderstorm WarningILXCass, Schuyler48 min
Aug 18, 11:25 PM CDTSevere Thunderstorm WarningILXCass, Morgan50 min
Aug 18, 11:50 PM CDTSevere Thunderstorm WarningILXScott40 min
Aug 19, 12:14 AM CDTSevere Thunderstorm WarningILXMorgan46 min
Aug 19, 12:28 AM CDTSevere Thunderstorm WarningILXScott32 min

Nearby

Severe Thunderstorm Warnings in Illinois, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.