Alert archive / Illinois / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 2, NWS Quad Cities, IA

March 22, 1991Henry County, Whiteside County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 22, 1991, 8:25 PM CST for Henry County, Whiteside County, Illinois. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Mar 22, 1991, 8:25 PM CST (02:25 UTC)
Expired
Mar 22, 1991, 9:30 PM CST
In force
65 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Henry County, IL, Whiteside County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.4 hours before the alert went out and 361 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 00:00Z on 1991-03-23Temperature 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, Green Bay/Straub, WI at 00:00Z on 1991-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 square meters per square second.1939587897117136Sfc1 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
521 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
281 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 Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 22, 7:14 PM CSTSevere Thunderstorm WarningDVNCedar, Muscatine41 min
Mar 22, 8:25 PM CSTSevere Thunderstorm WarningDVNClinton45 min
Mar 22, 9:15 PM CSTSevere Thunderstorm WarningDVNJo Daviess60 min
Mar 22, 8:28 PM CSTSevere Thunderstorm WarningDVNGrant47 min
Mar 22, 8:49 PM CSTSevere Thunderstorm WarningDVNLafayette56 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1991Every severe thunderstorm warning in 1991

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.