Alert archive / Illinois / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 157, NWS Lincoln, IL

October 17, 1996Macon County, Piatt County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Oct 17, 1996, 5:27 PM CDT for Macon County, Piatt 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: Oct 17, 1996, 5:27 PM CDT (22:27 UTC)
Expired: Oct 17, 1996, 6:15 PM CDT
In force: 48 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties Macon County, IL, Piatt County, IL

The radar

The Lincoln radar (KILX), 53 km from the middle of the area, began a volume at 22:31 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.5 hours before the alert went out and 28 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: 8 J/kg
Mixed-layer CIN: -442 J/kg
Mixed-layer LCL: 1191 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 185 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 Oct 17, 2:05 PM CDT, 3 hours 22 minutes earlier.

Area forecast discussion, Oct 17, 2:05 PM CDT, 3 hours 22 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
200 PM CDT THU OCT 17 1996

THIS WIL BE SHORT SINCE SVR TSTM WATCH JUST ISSUED AND CONVECTION
APPCHNG.

LTST ILX 88D INDICATED CONVECTION FIRING RAPIDLY JUST AHD OF CDFNT
IN WCENT IL. THESE STORMS MOVG INTO AREA OF MOCONV MAX BTWN STL-SPI
AND LOW LVL THRML AND MOISTURE AXIS. THIS SQUALL LINE WIL MARCH
ACRS OUR CWA REST OF AFTN INTO ERLY EVE AHD OF CDFNT. THE FNT IS
XPCTD TO MOVE EAST OF IL ERLY THIS EVE (01-03Z) ENDING CHC OF
SIGNIF PCPN. DEEP WRAP ARND MOISTURE TO STAY NORTH OF AREA...
BUT LINGERING LOW LVL MOISTURE AND APPCHNG NEG TILT UPR LVL TROF
MAY HELP PRODUCE SCTD SPRNKLS/DRIZZLE OVERNITE. CLDNS TO LINGER
TIL ERLY MRNG THEN BRIEF PERIOD OF CLRNG BFR HTG RAPIDLY DEVELOPS
CLDS AGAIN.

XPCT OVERNITE LOWS ARND 40 WITH ANTICIPATED CLD CVR...WHICH IS
SIMILAR IN BOTH FWC AND FAN. FOR FRIDAY THINK FWC TEMPS TOO WARM
SO WOULD LEAN TWD COOLER FAN TEMPS.

PIA   40/52  31
SPI   41/53  31
DEC   41/53  31
CMI   41/53  51
SEIL  43/55  51

MILLER

In the hours before

Special weather statement, Oct 17, 4:50 PM CDT, 37 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
Oct 17, 2:17 PM CDT	Severe Thunderstorm Warning	ILX	Scott	43 min
Oct 17, 2:50 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Mason, Tazewell	40 min
Oct 17, 2:50 PM CDT	Severe Thunderstorm Warning	ILX	Peoria	40 min
Oct 17, 4:20 PM CDT	Severe Thunderstorm Warning	ILX	Sangamon	40 min
Oct 17, 6:06 PM CDT	Severe Thunderstorm Warning	ILX	Effingham	54 min
Oct 17, 6:32 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland	43 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.