Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 18, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 27, 2021, 7:43 PM CDT for 7 counties in Illinois. It was in force for 47 min. 2 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
- Mar 27, 2021, 7:43 PM CDT (00:43 UTC)
- Expired
- Mar 27, 2021, 8:30 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bond County, IL, Clinton County, IL, Fayette County, IL, Madison County, IL, Marion County, IL, Saint Clair County, IL, Washington County, IL
The radar
The St Louis radar (KLSX), 125 km from the middle of the area, began a volume at 00:45 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 |
|---|---|---|---|
| Mar 27, 8:15 PM CDT | TSTM WND DMG | Centralia, IL | TREE LIMBS DOWN. |
| Mar 27, 8:29 PM CDT | HAIL 0.75 | 1 Ne Irvington, IL | REPORT FROM MPING: DIME (0.75 IN.). |
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 |
|---|---|---|---|
| Mar 27, 4:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.7 hours before the alert went out and 162 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
- 933 m above ground
- 0-6 km bulk shear
- 86 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
431
WUUS53 KLSX 280043
SVRLSX
ILC005-027-051-119-121-163-189-280130-
/O.NEW.KLSX.SV.W.0018.210328T0043Z-210328T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
743 PM CDT Sat Mar 27 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Clinton County in south central Illinois...
Bond County in south central Illinois...
Southeastern Madison County in southwestern Illinois...
Western Marion County in south central Illinois...
Fayette County in south central Illinois...
Northern Washington County in south central Illinois...
Eastern St. Clair County in southwestern Illinois...
* Until 830 PM CDT.
* At 742 PM CDT, severe thunderstorms were located along a line
extending from Van Burensburg to near Beaver Creek to near Lively
Grove, moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public. Numerous trees and powerlines were
reported snapped in St. Jacobs and south of Pocahontas.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Centralia, Highland, Mascoutah, Vandalia, Greenville, Breese,
Lebanon, Freeburg, New Baden, Carlyle, Nashville, Scott AFB,
Trenton, New Athens, Aviston, Okawville, St. Elmo, St. Rose,
Sandoval and Germantown.
This includes the following highways...
Interstate 70 in Illinois between exits 30 and 76.
Interstate 64 in Illinois between exits 23 and 61.
This also includes Carlyle Lake Recreational Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3847 8914 3834 8915 3832 9000 3899 8954
3903 8939 3903 8925 3906 8925 3917 8881
3891 8881
TIME...MOT...LOC 0042Z 258DEG 35KT 3902 8929 3877 8935 3835 8968
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
BRC1 follow-up statement
089
WWUS53 KLSX 280105
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
805 PM CDT Sat Mar 27 2021
ILC119-163-280114-
/O.CAN.KLSX.SV.W.0018.000000T0000Z-210328T0130Z/
Madison IL-St. Clair IL-
805 PM CDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MADISON AND
EASTERN ST. CLAIR COUNTIES IN SOUTHWESTERN ILLINOIS IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
south central Illinois.
LAT...LON 3847 8914 3834 8915 3833 8969 3891 8930
3899 8927 3903 8925 3906 8925 3917 8881
3891 8881
TIME...MOT...LOC 0104Z 258DEG 35KT 3906 8903 3881 8909 3839 8942
$$
ILC005-027-051-121-189-280130-
/O.CON.KLSX.SV.W.0018.000000T0000Z-210328T0130Z/
Clinton IL-Bond IL-Marion IL-Fayette IL-Washington IL-
805 PM CDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR CLINTON...SOUTHEASTERN BOND...WESTERN MARION...FAYETTE AND
NORTHERN WASHINGTON COUNTIES...
At 804 PM CDT, severe thunderstorms were located along a line
extending from 6 miles northwest of Brownstown to near Shobonier to
near Nashville, moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public. Numerous trees and powerlines were reported snapped
in St. Jacobs, IL and south of Pocahontas, IL.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Centralia, Vandalia, Breese, Carlyle, Nashville, Okawville, St. Elmo,
Sandoval, Germantown, Wamac, Central City, Odin, Beckemeyer,
Brownstown, Irvington, Mulberry Grove, Patoka, Tamalco, Beaver Creek
and Shobonier.
This also includes Carlyle Lake Recreational Area.
This includes the following highways...
Interstate 70 in Illinois between exits 52 and 76.
Interstate 64 in Illinois between exits 41 and 61.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3847 8914 3834 8915 3833 8969 3891 8930
3899 8927 3903 8925 3906 8925 3917 8881
3891 8881
TIME...MOT...LOC 0104Z 258DEG 35KT 3906 8903 3881 8909 3839 8942
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
BRCThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 7:03 PM CDT | Tornado Warning | LSX | Bond, Clinton, Madison, Saint Clair | 42 min |
| Mar 27, 7:06 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 39 min |
| Mar 27, 7:13 PM CDT | Tornado Warning | LSX | Clinton, Saint Clair, Washington | 47 min |
| Mar 27, 7:27 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair, Washington | 48 min |
| Mar 27, 7:45 PM CDT | Tornado Warning | LSX | Bond, Clinton, Fayette, Marion | 45 min |
| Mar 27, 7:59 PM CDT | Tornado Warning | LSX | Clinton, Marion, Washington | 31 min |
| Mar 27, 8:11 PM CDT | Severe Thunderstorm Warning | LSX | Randolph, Saint Clair, Washington | 64 min |
| Mar 27, 8:21 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion, Washington | 39 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2021Every severe thunderstorm warning in 2021
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.