Alert archive / Illinois / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 103, NWS Lincoln, IL

June 17, 1996Macon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 17, 1996, 3:01 PM CDT for Macon County, Illinois. It was in force for 44 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: Jun 17, 1996, 3:01 PM CDT (20:01 UTC)
Expired: Jun 17, 1996, 3:45 PM CDT
In force: 44 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Macon County, IL

The radar

The Lincoln radar (KILX), 45 km from the middle of the area, began a volume at 20:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 17, 3:01 PM CDT	Thunderstorm Wind	Niantic, 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.0 hours before the alert went out and 45 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: 1323 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 45 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.

NWS Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 2:04 PM CDT, 57 minutes earlier.

Area forecast discussion, Jun 17, 2:04 PM CDT, 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
200 PM CDT MON JUN 17 1996

LATEST ADAP AND MAPS DATA SHOWS GOOD MOISTURE CONV ACROSS WRN IL WHERE
TRWS ARE POPPING UP.  SVR WX BOXES POSTED FOR MOST OF CWA...SO NO TIME
FOR A DISCUSSION.

PIA  68/83  +7
SPI  68/85  +7
DEC  68/85  +7
CMI  67/84  +8
SEIL 70/86  +6

KETCHAM

In the hours before

Special weather statement, Jun 17, 11:05 AM CDT, 3 hours 56 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 3:06 PM CDT	Severe Thunderstorm Warning	ILX	Logan	39 min
Jun 17, 3:34 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, McLean	26 min
Jun 17, 5:07 PM CDT	Severe Thunderstorm Warning	ILX	Shelby	38 min
Jun 17, 6:09 PM CDT	Severe Thunderstorm Warning	ILX	Cumberland, Effingham, Jasper	36 min
Jun 17, 6:27 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	48 min
Jun 17, 6:47 PM CDT	Tornado Warning	ILX	Edgar, Vermilion	43 min
Jun 17, 6:57 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Cumberland, Jasper	33 min
Jun 17, 6:57 PM CDT	Severe Thunderstorm Warning	ILX	Crawford	33 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1996 Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.