Alert archive / Illinois / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 85, NWS Paducah, KY

May 2, 1997Alexander County, Pulaski County, Illinois

NWS Paducah, KY issued this severe thunderstorm warning at May 2, 1997, 9:11 PM CDT for Alexander County, Pulaski County, Illinois. It was in force for 49 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
May 2, 1997, 9:11 PM CDT (02:11 UTC)
Expired
May 2, 1997, 10:00 PM CDT
In force
49 min
Issued by
NWS Paducah, KY
Area
Whole counties

Counties Alexander County, IL, Pulaski County, IL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.2 hours before the alert went out and 264 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, Nashville Metro, TN at 00:00Z on 1997-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 388 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, Nashville Metro, TN at 00:00Z on 1997-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 365 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
388 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
655 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
365 m²/s²
0-3 km storm-relative helicity
637 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.2

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 Paducah, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 2, 9:37 PM CDTFlash Flood WarningPAHUnion3 hr
May 2, 10:49 PM CDTSevere Thunderstorm WarningPAHGraves26 min
May 2, 11:00 PM CDTSevere Thunderstorm WarningPAHCalloway45 min
May 2, 7:34 PM CDTSevere Thunderstorm WarningPAHRipley26 min
May 2, 8:13 PM CDTSevere Thunderstorm WarningPAHButler32 min
May 2, 8:43 PM CDTSevere Thunderstorm WarningPAHStoddard47 min
May 2, 9:01 PM CDTSevere Thunderstorm WarningPAHScott44 min
May 2, 9:44 PM CDTSevere Thunderstorm WarningPAHMassac46 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1997Every severe thunderstorm warning in 1997

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.