Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 74, NWS St. Louis, MO

April 16, 2000Jersey County, Madison County, Illinois; Saint Charles County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 16, 2000, 6:32 PM CDT for Jersey County, Madison County, Illinois; Saint Charles County, Missouri. It was in force for 43 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
Apr 16, 2000, 6:32 PM CDT (23:32 UTC)
Expired
Apr 16, 2000, 7:15 PM CDT
In force
43 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Jersey County, IL, Madison County, IL, Saint Charles County, MO

The radar

The St Louis radar (KLSX), 39 km from the middle of the area, began a volume at 23:37 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
Apr 16, 7:20 PM CDTHail 1.75Alton, ILStorm spotters reported hail up to golfball size in the Alton area.

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, 11.5 hours before the alert went out and 202 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 2000-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2000-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1031 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
90 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.

000 
WUUS53 KLSX 162333
SVRSTL
ILC083-119-MOC183-170015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
632 PM CDT SUN APR 16 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN JERSEY COUNTY IN SOUTHWESTERN ILLINOIS
  NORTHWESTERN MADISON COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS
  EASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 715 PM CDT

* AT 630 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTH OF ST CHARLES... MOVING
  NORTHEAST AT 25 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  ORCHARD FARM
  PORTAGE DES SIOUX
  BELTREES
  NEWBERN
  DELHI



THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN
CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT
OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY.



GKS/FG

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 3:29 PM CDTSevere Thunderstorm WarningLSXBrown51 min
Apr 16, 3:46 PM CDTSevere Thunderstorm WarningLSXPike49 min
Apr 16, 4:13 PM CDTSevere Thunderstorm WarningLSXMadison47 min
Apr 16, 4:20 PM CDTSevere Thunderstorm WarningLSXMonroe50 min
Apr 16, 4:34 PM CDTSevere Thunderstorm WarningLSXPike36 min
Apr 16, 5:16 PM CDTSevere Thunderstorm WarningLSXGreene49 min
Apr 16, 6:01 PM CDTSevere Thunderstorm WarningLSXGreene44 min
Apr 16, 6:08 PM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair52 min
Apr 16, 6:46 PM CDTSevere Thunderstorm WarningLSXGreene, Macoupin59 min
Apr 16, 1:00 PM CDTSevere Thunderstorm WarningLSXGasconade, Montgomery, Osage35 min
Apr 16, 1:28 PM CDTSevere Thunderstorm WarningLSXGasconade32 min
Apr 16, 2:01 PM CDTSevere Thunderstorm WarningLSXFranklin29 min
Apr 16, 2:23 PM CDTSevere Thunderstorm WarningLSXWarren52 min
Apr 16, 2:30 PM CDTSevere Thunderstorm WarningLSXRalls50 min
Apr 16, 2:36 PM CDTTornado WarningLSXWarren34 min
Apr 16, 2:49 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles46 min
Apr 16, 2:53 PM CDTTornado WarningLSXSaint Charles32 min
Apr 16, 2:59 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington51 min
Apr 16, 3:24 PM CDTTornado WarningLSXSaint Charles, Saint Louis46 min
Apr 16, 3:26 PM CDTSevere Thunderstorm WarningLSXJefferson49 min
Apr 16, 3:36 PM CDTSevere Thunderstorm WarningLSXJefferson49 min
Apr 16, 5:04 PM CDTSevere Thunderstorm WarningLSXLincoln51 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2000Severe Thunderstorm Warnings in Missouri, 2000Every severe thunderstorm warning in 2000

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.