Alert archive / Illinois / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 243, NWS Paducah, KY

August 5, 2008Hamilton County, Wayne County, White County, Illinois

NWS Paducah, KY issued this severe thunderstorm warning at Aug 5, 2008, 3:27 PM CDT for Hamilton County, Wayne County, White County, Illinois. It was in force for 48 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: Aug 5, 2008, 3:27 PM CDT (20:27 UTC)
Expired: Aug 5, 2008, 4:15 PM CDT
In force: 48 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon

Counties Hamilton County, IL, Wayne County, IL, White County, IL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 5, 2:59 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.5 hours before the alert went out and 218 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 618 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 1293 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

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.

NWS Paducah, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 5, 3:08 PM CDT, 19 minutes earlier.

Area forecast discussion, Aug 5, 3:08 PM CDT, 19 minutes before

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Hazardous weather outlook, Aug 5, 3:03 PM CDT, 24 minutes before

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The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 5, 4:15 AM CDT	Heat Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	15 hr
Aug 5, 4:02 PM CDT	Severe Thunderstorm Warning	PAH	White	43 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2008 Every severe thunderstorm warning in 2008

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.