Alert archive / Illinois / Tornado Warnings in 1999

Tornado Warning 28, NWS St. Louis, MO

May 5, 1999Marion County, Illinois

NWS St. Louis, MO issued this tornado warning at May 5, 1999, 6:11 PM CDT for Marion County, Illinois. It was in force for 49 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 5, 1999, 6:11 PM CDT (23:11 UTC)
Expired
May 5, 1999, 7:00 PM CDT
In force
49 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Marion County, IL

The watch it was issued in

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

IssuedProductOfficeLasted
May 5, 3:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.2 hours before the alert went out and 169 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, Lincoln, IL at 12:00Z on 1999-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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, Lincoln, IL at 12:00Z on 1999-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 square meters per square second.1939587897Sfc1 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
49 J/kg
Mixed-layer CIN
-201 J/kg
Mixed-layer LCL
869 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
208 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

999 
WFUS1 KSTL 052312 RRA
TORSTL
ILC121-060000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
611 PM CDT WED MAY 5 1999

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MARION COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS

* UNTIL 700 PM CDT

* AT 610 PM CDT... AREA LAW ENFORCEMENT
INDICATED A TORNADO   NEAR KELL ILLINOIS... MOVING NORTHEAST 35 MPH.

* LOCATIONS IN THE PATH...
  IUKA
  OTHER RURAL COMMUNITIES



A TORNADO IS ON THE GROUND IN YOU ARE IN THE PATH...MOVE
IMMEDIATELY TO A SUBSTANTIAL STRUCTURE NOW FOR PROTECTION. A
BASEMENT OFFERS THE BEST SHELTER. YOUR LIFE AND THE LIVES OF THOSE
AROUND YOU MAY DEPEND ON YOUR ACTIONS.

JP


&

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 2:03 PM CDTSevere Thunderstorm WarningLSXMarion47 min
May 5, 5:24 PM CDTSevere Thunderstorm WarningLSXWashington36 min
May 5, 5:36 PM CDTSevere Thunderstorm WarningLSXMarion49 min
May 5, 6:16 PM CDTSevere Thunderstorm WarningLSXFayette34 min
May 5, 6:23 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair47 min

Nearby

Tornado Warnings in Illinois, 1999Every tornado warning in 1999Tornadoes in 1999

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.