Alert archive / Illinois / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 101, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 15, 2020, 5:02 PM CDT for Fayette County, Macoupin County, Montgomery County, Illinois. It was in force for 43 min. 3 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
- Jul 15, 2020, 5:02 PM CDT (22:02 UTC)
- Expired
- Jul 15, 2020, 5:45 PM CDT
- In force
- 43 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Fayette County, IL, Macoupin County, IL, Montgomery County, IL
The radar
The Lincoln radar (KILX), 104 km from the middle of the area, began a volume at 22:03 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 |
|---|---|---|---|
| Jul 15, 5:05 PM CDT | TORNADO | 2 Nne Walshville, IL | A COMBINATION OF A GROUND SURVEY AND SATELLITE DATA SUGGESTS A BRIEF, WEAK TORNADO TOUCHED DOWN NORTHEAST OF WALSHVILLE, IL. THE TORNADO FIRST TOUCHED DOWN IN A CORN FIELD WEST OF DURBIN ROAD. THE TORNADO THEN CONTINUED NORTHEAST, MAINLY CAUSING TREE DAMAGE, A |
| Jul 15, 5:15 PM CDT | TSTM WND DMG | 1 Sse Butler, IL | LARGE TREE DOWN SOUTH OF BUTLER. TIME ESTIMATED FROM RADAR. |
| Jul 15, 5:15 PM CDT | TSTM WND DMG | 1 Sw Hillsboro, IL | LARGE TREE OVER THE ROADWAY IN HILLSBORO. TIME ESTIMATED FROM RADAR. |
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 |
|---|---|---|---|
| Jul 15, 2:10 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.0 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1529 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
611
WUUS53 KLSX 152202
SVRLSX
ILC051-117-135-152245-
/O.NEW.KLSX.SV.W.0101.200715T2202Z-200715T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
502 PM CDT Wed Jul 15 2020
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northwestern Fayette County in south central Illinois...
Southeastern Macoupin County in southwestern Illinois...
Montgomery County in south central Illinois...
* Until 545 PM CDT.
* At 502 PM CDT, a severe thunderstorm was located near Mount Olive,
moving northeast at 60 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Litchfield, Hillsboro, Gillespie, Nokomis, Benld, Raymond, Witt,
Taylor Springs, Coffeen, Schram City, Sawyerville, Mount Clare,
East Gillespie, Eagarville, Irving, Fillmore, Coalton, White City,
Butler and Ohlman.
This includes Interstate 55 in Illinois between exits 52 and 63.
This also includes Lake Lou Yaeger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
and southwestern Illinois.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
This is a DANGEROUS SITUATION. This storm is producing widespread
wind damage. SEEK SHELTER NOW inside a sturdy structure and stay
away from windows!
&&
LAT...LON 3908 8914 3908 8986 3934 8974 3935 8945
3935 8914
TIME...MOT...LOC 2202Z 243DEG 50KT 3909 8963
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
$$
Glass4 follow-up statements
938
WWUS53 KLSX 152210 RRA
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
510 PM CDT Wed Jul 15 2020
ILC117-152219-
/O.CAN.KLSX.SV.W.0101.000000T0000Z-200715T2245Z/
Macoupin IL-
510 PM CDT Wed Jul 15 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MACOUPIN COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for south central
Illinois.
LAT...LON 3908 8914 3908 8964 3934 8970 3935 8945
3935 8914
TIME...MOT...LOC 2209Z 246DEG 48KT 3916 8967 3907 8952 3888 8950
$$
ILC051-135-152245-
/O.CON.KLSX.SV.W.0101.000000T0000Z-200715T2245Z/
Fayette IL-Montgomery IL-
510 PM CDT Wed Jul 15 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR NORTHWESTERN FAYETTE AND MONTGOMERY COUNTIES...
At 509 PM CDT, severe thunderstorms were located along a line
extending from Litchfield to near Taylor Springs to near Pocahontas,
moving northeast at 55 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Litchfield, Hillsboro, Nokomis, Raymond, Witt, Taylor Springs,
Coffeen, Schram City, Irving, Fillmore, Coalton, Butler, Ohlman,
Bingham, Wenonah, Chapman, Bayle City and Honey Bend.
This also includes Lake Lou Yaeger.
This includes Interstate 55 in Illinois between exits 60 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Illinois.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
&&
LAT...LON 3908 8914 3908 8964 3934 8970 3935 8945
3935 8914
TIME...MOT...LOC 2209Z 246DEG 48KT 3916 8967 3907 8952 3888 8950
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
$$
CVKING725
WWUS53 KLSX 152217
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
517 PM CDT Wed Jul 15 2020
ILC051-135-152245-
/O.CON.KLSX.SV.W.0101.000000T0000Z-200715T2245Z/
Fayette IL-Montgomery IL-
517 PM CDT Wed Jul 15 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR NORTHWESTERN FAYETTE AND SOUTHERN MONTGOMERY COUNTIES...
At 517 PM CDT, severe thunderstorms were located along a line
extending from near Hillsboro to near Coffeen to near Greenville,
moving northeast at 55 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Litchfield, Hillsboro, Nokomis, Witt, Taylor Springs, Coffeen, Schram
City, Irving, Fillmore, Coalton, Butler, Bingham, Wenonah, Chapman
and Bayle City.
This also includes Lake Lou Yaeger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Illinois.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
&&
LAT...LON 3908 8914 3908 8964 3923 8967 3935 8914
TIME...MOT...LOC 2217Z 244DEG 47KT 3920 8951 3911 8936 3893 8938
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
$$
CVKING958
WWUS53 KLSX 152231
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
531 PM CDT Wed Jul 15 2020
ILC051-135-152245-
/O.CON.KLSX.SV.W.0101.000000T0000Z-200715T2245Z/
Fayette IL-Montgomery IL-
531 PM CDT Wed Jul 15 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR NORTHWESTERN FAYETTE AND SOUTHEASTERN MONTGOMERY COUNTIES...
At 531 PM CDT, severe thunderstorms were located along a line
extending from Witt to near Ramsey to near Van Burensburg, moving
northeast at 60 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Nokomis, Witt, Coffeen, Fillmore, Coalton, Bingham, Wenonah, Bayle
City and Chapman.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Illinois.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
&&
LAT...LON 3908 8914 3908 8939 3930 8936 3935 8914
TIME...MOT...LOC 2231Z 243DEG 50KT 3927 8933 3918 8918 3900 8920
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
$$
CVKING665 WWUS53 KLSX 152244 SVSLSX Severe Weather Statement National Weather Service St Louis MO 544 PM CDT Wed Jul 15 2020 ILC051-135-152253- /O.EXP.KLSX.SV.W.0101.000000T0000Z-200715T2245Z/ Fayette IL-Montgomery IL- 544 PM CDT Wed Jul 15 2020 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FAYETTE AND SOUTHEASTERN MONTGOMERY COUNTIES WILL EXPIRE AT 545 PM CDT... The storms which prompted the warning have moved out of the warned area. Therefore, the warning will be allowed to expire. A Tornado Watch remains in effect until 900 PM CDT for south central Illinois. LAT...LON 3908 8914 3908 8939 3930 8936 3935 8914 TIME...MOT...LOC 2243Z 243DEG 50KT 3935 8913 3926 8898 3908 8900 $$ CVKING
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 9:56 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 49 min |
| Jul 15, 2:26 PM CDT | Flash Flood Warning | LSX | Adams | 5 hr |
| Jul 15, 4:20 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Monroe, Saint Clair | 40 min |
| Jul 15, 4:38 PM CDT | Tornado Warning | LSX | Macoupin, Montgomery | 23 min |
| Jul 15, 4:48 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Macoupin, Montgomery | 42 min |
| Jul 15, 4:58 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 47 min |
| Jul 15, 5:13 PM CDT | Tornado Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 25 min |
| Jul 15, 5:19 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Madison | 41 min |
| Jul 15, 5:30 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette, Montgomery | 45 min |
| Jul 15, 5:35 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph | 40 min |
| Jul 15, 5:43 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 47 min |
| Jul 15, 5:46 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette | 44 min |
| Jul 15, 6:01 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 44 min |
| Jul 15, 6:10 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 50 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2020Every severe thunderstorm warning in 2020
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.