Alert archive / Illinois / Tornado Warnings in 2024

Tornado Warning 33, NWS St. Louis, MO

April 18, 2024Macoupin County, Montgomery County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 18, 2024, 5:45 PM CDT for Macoupin County, Montgomery County, Illinois. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 18, 2024, 5:45 PM CDT (22:45 UTC)
Expired
Apr 18, 2024, 6:30 PM CDT
In force
45 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Macoupin County, IL, Montgomery County, IL

The radar

The Lincoln radar (KILX), 94 km from the middle of the area, began a volume at 22:44 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 18, 5:52 PM CDTTORNADO3 S Standard City, ILA brief tornado touched down south of Standard City where it damaged the roofs of 3 farm sheds. The tornado moved southeast across South Standard City Rd where it caused tree damage before lifting. Path length 0.23 miles. Estimated peak wind speed 95 mph. Rati

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 18, 12:56 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 125 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 2024-04-18Temperature 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 2024-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1827 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
269 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

644 
WFUS53 KLSX 182245
TORLSX
ILC117-135-182330-
/O.NEW.KLSX.TO.W.0033.240418T2245Z-240418T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
545 PM CDT Thu Apr 18 2024

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northeastern Macoupin County in southwestern Illinois...
  Northwestern Montgomery County in south central Illinois...

* Until 630 PM CDT.

* At 543 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Carlinville, moving east at 25 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Raymond around 600 PM CDT.

This includes Interstate 55 in Illinois between exits 60 and 63.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3922 8948 3928 8982 3942 8983 3944 8953
      3935 8953 3935 8947
TIME...MOT...LOC 2243Z 275DEG 23KT 3933 8982 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Pfahler
2 follow-up statements
739 
WWUS53 KLSX 182309
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
609 PM CDT Thu Apr 18 2024

ILC117-182318-
/O.CAN.KLSX.TO.W.0033.000000T0000Z-240418T2330Z/
Macoupin IL-
609 PM CDT Thu Apr 18 2024

...THE TORNADO WARNING FOR NORTHEASTERN MACOUPIN COUNTY IS
CANCELLED...

The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central and southwestern Illinois.

&&

LAT...LON 3922 8948 3922 8949 3926 8970 3935 8971
      3935 8970 3936 8970 3939 8953 3935 8953
      3935 8947
TIME...MOT...LOC 2308Z 281DEG 20KT 3930 8966 

$$

ILC135-182330-
/O.CON.KLSX.TO.W.0033.000000T0000Z-240418T2330Z/
Montgomery IL-
609 PM CDT Thu Apr 18 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR WEST
CENTRAL MONTGOMERY COUNTY...

At 608 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Raymond, moving east at 25 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
  Raymond.

This includes Interstate 55 in Illinois between exits 60 and 63.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3922 8948 3922 8949 3926 8970 3935 8971
      3935 8970 3936 8970 3939 8953 3935 8953
      3935 8947
TIME...MOT...LOC 2308Z 281DEG 20KT 3930 8966 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Pfahler
722 
WWUS53 KLSX 182318
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
618 PM CDT Thu Apr 18 2024

ILC135-182330-
/O.CON.KLSX.TO.W.0033.000000T0000Z-240418T2330Z/
Montgomery IL-
618 PM CDT Thu Apr 18 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR WEST
CENTRAL MONTGOMERY COUNTY...

At 618 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Raymond, moving east at 15 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Raymond and Honey Bend.

This includes Interstate 55 in Illinois between exits 60 and 63.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3933 8970 3935 8953 3935 8947 3922 8948
      3922 8949 3926 8970
TIME...MOT...LOC 2318Z 275DEG 15KT 3928 8962 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Pfahler

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 3:23 PM CDTSevere Thunderstorm WarningLSXCalhoun, Pike52 min
Apr 18, 3:49 PM CDTTornado WarningLSXPike26 min
Apr 18, 4:03 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXGreene57 min
Apr 18, 4:16 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXCalhoun44 min
Apr 18, 4:25 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene50 min
Apr 18, 4:40 PM CDTSevere Thunderstorm WarningLSXCalhoun50 min
Apr 18, 4:47 PM CDTSevere Thunderstorm WarningLSXMacoupin58 min
Apr 18, 4:48 PM CDTTornado WarningLSXCalhoun42 min
Apr 18, 4:52 PM CDTSevere Thunderstorm WarningLSXGreene, Jersey38 min
Apr 18, 5:01 PM CDTTornado Warning Tornado observedLSXGreene, Macoupin29 min
Apr 18, 5:07 PM CDTTornado WarningLSXGreene, Jersey23 min
Apr 18, 5:18 PM CDTSevere Thunderstorm WarningLSXJersey, Madison27 min
Apr 18, 5:25 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair65 min
Apr 18, 5:26 PM CDTTornado WarningLSXMacoupin34 min
Apr 18, 5:30 PM CDTSevere Thunderstorm WarningLSXGreene, Jersey, Macoupin60 min
Apr 18, 5:34 PM CDTTornado WarningLSXGreene, Jersey, Macoupin26 min
Apr 18, 5:37 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXMonroe53 min
Apr 18, 5:39 PM CDTSevere Thunderstorm WarningLSXMadison, Monroe, Saint Clair66 min
Apr 18, 5:45 PM CDTTornado WarningLSXMadison45 min
Apr 18, 5:49 PM CDTTornado WarningLSXMonroe, Saint Clair41 min
Apr 18, 5:53 PM CDTAreal Flood AdvisoryLSXGreene, Macoupin2 hr
Apr 18, 5:56 PM CDTTornado WarningLSXMacoupin, Madison49 min
Apr 18, 5:59 PM CDTTornado WarningLSXMacoupin31 min
Apr 18, 6:10 PM CDTTornado WarningLSXBond, Clinton, Madison, Saint Clair, Washington65 min
Apr 18, 6:13 PM CDTSevere Thunderstorm WarningLSXMonroe, Randolph, Saint Clair, Washington77 min
Apr 18, 6:14 PM CDTTornado WarningLSXMontgomery46 min
Apr 18, 6:34 PM CDTTornado WarningLSXMonroe, Randolph41 min
Apr 18, 6:41 PM CDTTornado WarningLSXFayette49 min

Nearby

Tornado Warnings in Illinois, 2024Every tornado warning in 2024Tornadoes in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.