Alert archive / Illinois / Tornado Warnings in 1996

Tornado Warning 13, NWS Quad Cities, IA

May 9, 1996Warren County, Illinois

NWS Quad Cities, IA issued this tornado warning at May 9, 1996, 8:47 PM CDT for Warren County, Illinois. It was in force for 58 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
May 9, 1996, 8:47 PM CDT (01:47 UTC)
Expired
May 9, 1996, 9:45 PM CDT
In force
58 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Warren County, IL

The radar

The Quad Cities radar (KDVN), 85 km from the middle of the area, began a volume at 01:50 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

TimeReportWhereRemark
May 9, 9:00 PM CDTTornado F0Monmouth, 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

Davenport, (KDVN), launched 00:00Z, 1.8 hours before the alert went out and 86 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 1996-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 552 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 1996-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.1939587897117136156175Sfc1 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
552 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
696 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
-495 m²/s²
Significant tornado parameter
-0.2
Supercell composite
-2.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLI 100148
TORMLI
ILC187-100245-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
847 PM CDT THU MAY 9 1996
 
THE NATIONAL WEATHER SERVICE IN QUAD CITIES IA HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  945 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL ILLINOIS
 
   ...WARREN COUNTY
 
AT 847 PM CDT...A TORNADO WAS DEVELOPING BETWEEN BALD BLUFF AND
LITTLE YORK...MOVING EAST AT 25 MILES AN HOUR. THE TORNADO WILL
REACH LITTLE YORK BY 855 PM...AND TRACK ACROSS NORTHERN WARREN
COUNTY JUST SOUTH OF ALEXIS.
 
ABANDON MOBILE HOMES!  GO INSIDE A NEARBY STURDY BUILDING!
AS A LAST RESORT...LIE FLAT IN A DITCH AND COVER YOUR HEAD.
 
BOEHMKE
 
 (

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 8:06 PM CDTTornado WarningDVNMercer69 min
May 9, 11:38 PM CDTFlash Flood WarningDVNMercer, Rock Island8 hr
May 10, 2:36 AM CDTSevere Thunderstorm WarningDVNWhiteside54 min
May 10, 2:41 AM CDTTornado WarningDVNWhiteside49 min
May 10, 3:00 AM CDTTornado WarningDVNCarroll45 min

Nearby

Tornado Warnings in Illinois, 1996Every tornado warning in 1996Tornadoes 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.