Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 21, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 27, 2021, 8:21 PM CDT for 4 counties in Illinois. It was in force for 39 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
- Mar 27, 2021, 8:21 PM CDT (01:21 UTC)
- Expired
- Mar 27, 2021, 9:00 PM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Clinton County, IL, Fayette County, IL, Marion County, IL, Washington County, IL
The radar
The Evansville,IN radar (KVWX), 122 km from the middle of the area, began a volume at 01:22 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, 8:29 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, 1.4 hours before the alert went out and 166 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.
739
WUUS53 KLSX 280121
SVRLSX
ILC027-051-121-189-280200-
/O.NEW.KLSX.SV.W.0021.210328T0121Z-210328T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
821 PM CDT Sat Mar 27 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northeastern Clinton County in south central Illinois...
Marion County in south central Illinois...
Central Fayette County in south central Illinois...
Northeastern Washington County in south central Illinois...
* Until 900 PM CDT.
* At 818 PM CDT, severe thunderstorms were located along a line
extending from near Altamont to 6 miles southwest of Kinmundy to
near Ashley, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Centralia, Salem, Nashville, St. Elmo, Sandoval, Wamac, Central
City, Odin, Kinmundy, Brownstown, Irvington, Patoka, Farina, Omega,
Stephen Forbes Station, Shobonier, Fairman, Wrights Corner, Shattuc
and Helm.
This includes the following highways...
Interstate 70 in Illinois between exits 68 and 76.
Interstate 57 in Illinois between exits 109 and 135.
Interstate 64 in Illinois between exits 50 and 61.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3847 8914 3835 8915 3833 8945 3869 8917
3911 8904 3917 8881 3891 8881 3891 8869
3848 8870
TIME...MOT...LOC 0118Z 256DEG 44KT 3909 8881 3873 8895 3830 8924
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
BRC1 follow-up statement
643
WWUS53 KLSX 280141
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
841 PM CDT Sat Mar 27 2021
ILC027-051-121-189-280200-
/O.CON.KLSX.SV.W.0021.000000T0000Z-210328T0200Z/
Clinton IL-Marion IL-Fayette IL-Washington IL-
841 PM CDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR EAST CENTRAL CLINTON...MARION...SOUTHEASTERN FAYETTE AND
NORTHEASTERN WASHINGTON COUNTIES...
At 840 PM CDT, severe thunderstorms were located along a line
extending from Teutopolis to near Iola to near Mount Vernon, moving
east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Centralia, Salem, Nashville, Wamac, Central City, Odin, Kinmundy,
Irvington, Farina, Omega, Stephen Forbes Station, Helm, Tonti, La
Clede, Beaucoup, Hoyleton, Iuka, Junction City, St. Peter and Alma.
This includes the following highways...
Interstate 57 in Illinois between exits 109 and 135.
Interstate 64 in Illinois between exits 50 and 61.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3833 8945 3847 8934 3862 8906 3884 8887
3891 8881 3891 8869 3848 8870 3847 8914
3835 8915
TIME...MOT...LOC 0140Z 256DEG 44KT 3915 8850 3879 8864 3836 8893
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
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, 7:43 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Madison, Marion, Saint Clair and 1 more | 47 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 |
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.