Alert archive / Illinois / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 91, NWS Lincoln, IL

August 19, 1994Winnebago County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 19, 1994, 4:08 PM CDT for Winnebago County, Illinois. It was in force for 52 min.

The area

The counties it named.

The facts

Issued
Aug 19, 1994, 4:08 PM CDT (21:08 UTC)
Expired
Aug 19, 1994, 5:00 PM CDT
In force
52 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Winnebago County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.1 hours before the alert went out and 253 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, Green Bay/Straub, WI at 12:00Z on 1994-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 15 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, Green Bay/Straub, WI at 12:00Z on 1994-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 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
15 J/kg
Mixed-layer CIN
-245 J/kg
Mixed-layer LCL
690 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
27 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, 9:30 PM CDTSevere Thunderstorm WarningILXBoone, DeKalb, Ogle, Winnebago45 min
Aug 18, 11:21 PM CDTSevere Thunderstorm WarningILXBoone, Winnebago40 min
Aug 19, 3:31 PM CDTSevere Thunderstorm WarningILXStephenson29 min
Aug 19, 4:08 PM CDTSevere Thunderstorm WarningILXJo Daviess52 min
Aug 19, 4:33 PM CDTTornado WarningILXStephenson, Winnebago42 min
Aug 19, 5:16 PM CDTSevere Thunderstorm WarningILXCarroll, Ogle44 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1994Every severe thunderstorm warning in 1994

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.