Alert archive / Illinois / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 4, NWS Lincoln, IL

March 26, 1991McDonough County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Mar 26, 1991, 9:15 PM CST for McDonough County, Illinois. It was in force for 105 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
Mar 26, 1991, 9:15 PM CST (03:15 UTC)
Expired
Mar 26, 1991, 11:00 PM CST
In force
105 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County McDonough County, IL

What was reported inside it

TimeReportWhereRemark
Mar 26, 9:58 PM CSTHail 0.75Mcdonough, IL

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 3.3 hours before the alert went out and 454 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, Topeka, KS at 00:00Z on 1991-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 37 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, Topeka, KS at 00:00Z on 1991-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 413 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
37 J/kg
Mixed-layer CIN
-168 J/kg
Mixed-layer LCL
779 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
413 m²/s²
0-3 km storm-relative helicity
384 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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Mar 26, 8:16 PM CST, 59 minutes before
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Special weather statement, Mar 26, 8:19 PM CST, 56 minutes before
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Special weather statement, Mar 26, 9:06 PM CST, 9 minutes before
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Special weather statement, Mar 26, 9:13 PM CST, 2 minutes before
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The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 26, 9:15 PM CSTSevere Thunderstorm WarningILXHancock60 min
Mar 26, 10:25 PM CSTSevere Thunderstorm WarningILXFulton65 min
Mar 26, 10:36 PM CSTSevere Thunderstorm WarningILXPeoria2 hr
Mar 26, 11:04 PM CSTSevere Thunderstorm WarningILXTazewell, Woodford56 min
Mar 26, 11:32 PM CSTSevere Thunderstorm WarningILXMarshall58 min
Mar 26, 11:55 PM CSTSevere Thunderstorm WarningILXKnox, Warren65 min
Mar 27, 12:32 AM CSTSevere Thunderstorm WarningILXBureau28 min
Mar 27, 12:09 PM CSTSevere Thunderstorm WarningILXHenderson, Warren66 min
Mar 27, 1:04 PM CSTSevere Thunderstorm WarningILXCarroll, Stephenson26 min
Mar 27, 1:31 PM CSTSevere Thunderstorm WarningILXLee, Ogle, Stephenson, Winnebago44 min
Mar 27, 1:46 PM CSTTornado WarningILXOgle, Winnebago44 min
Mar 27, 2:07 PM CSTSevere Thunderstorm WarningILXBoone53 min
Mar 27, 2:07 PM CSTSevere Thunderstorm WarningILXLee53 min
Mar 27, 2:25 PM CSTSevere Thunderstorm WarningILXPeoria35 min
Mar 27, 2:30 PM CSTTornado WarningILXLee, Ogle30 min
Mar 27, 2:30 PM CSTTornado WarningILXBoone, Winnebago30 min
Mar 27, 2:44 PM CSTSevere Thunderstorm WarningILXMarshall, Putnam31 min
Mar 27, 3:00 PM CSTSevere Thunderstorm WarningILXPeoria30 min
Mar 27, 3:13 PM CSTSevere Thunderstorm WarningILXMarshall, Woodford22 min
Mar 27, 3:18 PM CSTSevere Thunderstorm WarningILXDeKalb27 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.