Alert archive / Illinois / Tornado Warnings in 2018

Tornado Warning 18, NWS St. Louis, MO

December 1, 2018Macoupin County, Montgomery County, Illinois

NWS St. Louis, MO issued this tornado warning at Dec 1, 2018, 4:08 PM CST for Macoupin County, Montgomery County, Illinois. It was in force for 37 min. 9 reports 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: Dec 1, 2018, 4:08 PM CST (22:08 UTC)
Expired: Dec 1, 2018, 4:45 PM CST
In force: 37 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Macoupin County, IL, Montgomery County, IL

The radar

The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 22:10 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

Time	Report	Where	Remark
Dec 1, 4:11 PM CST	HAIL 1	Litchfield, IL
Dec 1, 4:15 PM CST	FUNNEL CLOUD	1 W Litchfield, IL	SEVERAL REPORTS OF A FUNNEL CLOUD EAST OF I-55 BETWEEN 4:05 P.M. AND 4:15 P.M. A CALLER STATED A FUNNEL WAS OBSERVED JUST SOUTH OF LITCHFIELD AS THEY WERE TRAVELING NEAR EXIT 60.
Dec 1, 4:16 PM CST	TORNADO	2 Se Litchfield, IL	NWS SURVEY CREW CONFIRMS EF-2 TORNADO. MAX WINDS WERE 115 MPH. PATH LENGTH WAS 7.93 MILES. PATH WIDTH WAS 100 YARDS.
Dec 1, 4:20 PM CST	HAIL 1.75	Litchfield, IL
Dec 1, 4:21 PM CST	FUNNEL CLOUD	1 Nne Honey Bend, IL	HAM RADIO REPORTED SEVERAL FUNNELS HAD BEEN SITED NORTH OF HONEY BEND WEST OF RAYMOND, IL. EMERGENCY MANAGEMENT RELAYED REPORTS OF A POTENTIAL TOUCH DOWN. LOCATION ESTIMATED BY RADAR.
Dec 1, 4:21 PM CST	HAIL 1.75	2 N Litchfield, IL	DELAYED REPORT. TIME ESTIMATED FROM RADAR. PHOTOS POSTED TO SOCIAL MEDIA WERE TAKEN NORTH OF LITCHFIELD. ONE PHOTO SHOWS HAIL WHICH MAY HAVE BEEN LARGER THAN A GOLF BALL.
Dec 1, 4:21 PM CST	TORNADO	2 Ese Litchfield, IL	EMERGENCY MANAGEMENT RELAYED A REPORT OF A TORNADO ON THE GROUND EAST OF LITCHFIELD. LOCATION IS ESTIMATED BY RADAR DATA AND HAS NOT YET BE CONFIRMED/SURVEYED.
Dec 1, 4:26 PM CST	TORNADO	2 W Butler, IL	FRIEND OF NWS EMPLOYEE SUBMITTED PHOTOS OF STRUCTURAL DAMAGE TO A HOME EAST OF LAKE LOU YAEGER. PHOTO SHOWS CONSIDERABLE DAMAGE WITH WALLS COLLAPSED IN AND ROOF REMOVED. TIME ESTIMATED BY RADAR.
Dec 1, 4:32 PM CST	TORNADO	4 E Honey Bend, IL	NWS SURVEY CREW CONFIRMS AN EF-1 TORNADO. MAX WINDS WERE 100 MPH. PATH LENGTH WAS 2 MILES. PATH WIDTH WAS 50 YARDS.

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.

Issued	Product	Office	Lasted
Dec 1, 2:16 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.1 hours before the alert went out and 138 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 430 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 529 m²/s²
0-3 km storm-relative helicity: 658 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

096 
WFUS53 KLSX 012208
TORLSX
ILC117-135-012245-
/O.NEW.KLSX.TO.W.0018.181201T2208Z-181201T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
408 PM CST SAT DEC 1 2018

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Macoupin County in southwestern Illinois...
  West central Montgomery County in south central Illinois...

* Until 445 PM CST.
    
* At 408 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Mount Olive, moving northeast at 30 mph.

  HAZARD...Tornado and half dollar 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...
  Litchfield around 430 PM CST.
  Hillsboro around 435 PM CST.

Other locations impacted by this tornadic thunderstorm include Honey
Bend, Butler and White City.

This also includes  Lake Lou Yaeger.
 
This includes Interstate 55 in Illinois between exits 44 and 52.
 
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 3923 8943 3903 8972 3907 8977 3930 8960
TIME...MOT...LOC 2208Z 219DEG 25KT 3909 8971 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

TES

2 follow-up statements

197 
WWUS53 KLSX 012217
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
417 PM CST SAT DEC 1 2018

ILC117-012226-
/O.CAN.KLSX.TO.W.0018.000000T0000Z-181201T2245Z/
Macoupin IL-
417 PM CST SAT DEC 1 2018

...THE TORNADO WARNING FOR SOUTHEASTERN 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 Tornado Watch remains in effect until 700 PM CST for south central
Illinois.

LAT...LON 3923 8943 3908 8965 3914 8969 3930 8960
TIME...MOT...LOC 2216Z 213DEG 28KT 3915 8965 

$$

ILC135-012245-
/O.CON.KLSX.TO.W.0018.000000T0000Z-181201T2245Z/
Montgomery IL-
417 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CST FOR WEST
CENTRAL MONTGOMERY COUNTY...
    
At 416 PM CST, a severe thunderstorm capable of producing a tornado
was located over Litchfield, moving northeast at 30 mph.

HAZARD...Tornado and half dollar 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...
  Hillsboro around 430 PM CST.

Other locations impacted by this tornadic thunderstorm include Butler
and Honey Bend.

This also includes  Lake Lou Yaeger.
 
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 3923 8943 3908 8965 3914 8969 3930 8960
TIME...MOT...LOC 2216Z 213DEG 28KT 3915 8965 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

TES

924 
WWUS53 KLSX 012220 CCA
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
420 PM CST SAT DEC 1 2018

ILC117-012226-
/O.COR.KLSX.TO.W.0018.000000T0000Z-181201T2245Z/
Macoupin IL-
420 PM CST SAT DEC 1 2018

...THE TORNADO WARNING FOR 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 Tornado Watch remains in effect until 700 PM CST for south central
Illinois.

LAT...LON 3923 8943 3908 8965 3914 8969 3930 8960
TIME...MOT...LOC 2216Z 213DEG 28KT 3915 8965 

$$

ILC135-012245-
/O.COR.KLSX.TO.W.0018.000000T0000Z-181201T2245Z/
Montgomery IL-
420 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CST FOR WEST
CENTRAL MONTGOMERY COUNTY...
    
At 420 PM CST, a confirmed large and extremely dangerous tornado was
located over Litchfield, moving northeast at 30 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Emergency management confirmed tornado.

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible.

The tornado will be near...
  Hillsboro around 430 PM CST.

Other locations impacted by this tornadic thunderstorm include Butler
and Honey Bend.

This also includes  Lake Lou Yaeger.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, 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 3923 8943 3908 8965 3914 8969 3930 8960
TIME...MOT...LOC 2216Z 213DEG 28KT 3915 8965 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.75IN

$$

TES

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 1, 3:54 AM CST	Severe Thunderstorm Warning	LSX	Randolph	29 min
Dec 1, 2:17 PM CST	Severe Thunderstorm Warning	LSX	Pike	43 min
Dec 1, 2:21 PM CST	Severe Thunderstorm Warning	LSX	Adams, Brown	20 min
Dec 1, 2:28 PM CST	Severe Thunderstorm Warning	LSX	Pike	30 min
Dec 1, 2:37 PM CST	Tornado Warning	LSX	Pike	25 min
Dec 1, 3:34 PM CST	Severe Thunderstorm Warning	LSX	Greene, Jersey	41 min
Dec 1, 3:57 PM CST	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	48 min
Dec 1, 4:28 PM CST	Tornado Warning Tornado observed	LSX	Montgomery	17 min
Dec 1, 4:32 PM CST	Tornado Warning Tornado observedConsiderable damage threat	LSX	Montgomery	28 min
Dec 1, 4:39 PM CST	Severe Thunderstorm Warning	LSX	Macoupin	51 min
Dec 1, 4:43 PM CST	Tornado Warning	LSX	Montgomery	14 min

Nearby

Tornado Warnings in Illinois, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.