Alert archive / Illinois / Tornado Warnings in 1997

Tornado Warning 18, NWS Lincoln, IL

May 18, 1997Peoria County, Illinois

NWS Lincoln, IL issued this tornado warning at May 18, 1997, 10:13 PM CDT for Peoria County, Illinois. It was in force for 32 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 18, 1997, 10:13 PM CDT (03:13 UTC)
Expired
May 18, 1997, 10:45 PM CDT
In force
32 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Peoria County, IL

The radar

The Lincoln radar (KILX), 79 km from the middle of the area, began a volume at 03:14 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 watch it was issued in

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

IssuedProductOfficeLasted
May 18, 5:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.2 hours before the alert went out and 111 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, Davenport, at 00:00Z on 1997-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2339 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, Davenport, at 00:00Z on 1997-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 145 square meters per square second.19395878Sfc1 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
2339 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1544 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
145 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
1.0
Supercell composite
9.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSPI 190314 RRA
TORSPI
ILC143-190345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1013 PM CDT SUN MAY 18 1997

* TORNADO WARNING FOR
  SOUTHERN PEORIA COUNTY - CENTRAL ILLINOIS

* UNTIL 1045 PM CDT
 
* SOME TOWNS AFFECTED
  HANNA CITY
  PEORIA
  GLASFORD

* AT 1013 PM CDT LINCOLN DOPPLER RADAR INDICATED A POSSIBLE TORNADO
  JUST WEST OF PEORIA...MOVING EAST-SOUTHEAST AT 35 MPH.

TAKE COVER IMMEDIATELY IN A BASEMENT ORj INTERIOR ROOM ON THE LOWEST
FLOOR. ABANDON MOBILE HOMES AND VEHICLES FOR SAFER SHELTER.

GEELHART

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 8:33 PM CDTSevere Thunderstorm WarningILXKnox47 min
May 18, 9:17 PM CDTTornado WarningILXKnox48 min
May 18, 9:31 PM CDTTornado WarningILXFulton, Peoria49 min
May 18, 10:10 PM CDTTornado WarningILXTazewell50 min
May 18, 10:17 PM CDTSevere Thunderstorm WarningILXKnox43 min

Nearby

Tornado Warnings in Illinois, 1997Every tornado warning in 1997Tornadoes 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; radar from the NEXRAD Level II archive.