Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS St. Louis, MO

June 19, 2021Calhoun County, Jersey County, Illinois; Lincoln County, Saint Charles County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 2021, 3:31 PM CDT for Calhoun County, Jersey County, Illinois; Lincoln County, Saint Charles County, Missouri. It was in force for 44 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: Jun 19, 2021, 3:31 PM CDT (20:31 UTC)
Expired: Jun 19, 2021, 4:15 PM CDT
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Calhoun County, IL, Jersey County, IL, Lincoln County, MO, Saint Charles County, MO

The radar

The St Louis radar (KLSX), 34 km from the middle of the area, began a volume at 20:32 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
Jun 19, 3:38 PM CDT	TSTM WND DMG	1 Nnw Beechville, IL	SEVERAL LARGE TREES BLOWN DOWN TO THE SOUTH OF BATCHTOWN.

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
Jun 19, 2:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.5 hours before the alert went out and 219 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: 1960 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

586 
WUUS53 KLSX 192031
SVRLSX
ILC013-083-MOC113-183-192115-
/O.NEW.KLSX.SV.W.0065.210619T2031Z-210619T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
331 PM CDT Sat Jun 19 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Calhoun County in southwestern Illinois...
  Southwestern Jersey County in southwestern Illinois...
  North central St. Charles County in east central Missouri...
  East central Lincoln County in east central Missouri...

* Until 415 PM CDT.

* At 330 PM CDT, a severe thunderstorm was located near Winfield,
  moving southeast at 20 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Grafton, Elsah and Orchard Farms.

This also includes Pere Marquette State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

&&

LAT...LON 3903 9087 3914 9080 3901 9031 3879 9050
TIME...MOT...LOC 2030Z 297DEG 17KT 3903 9064 

HAIL...1.50IN
WIND...60MPH
 
$$

KD

1 follow-up statement

356 
WWUS53 KLSX 192041
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
341 PM CDT Sat Jun 19 2021

ILC013-083-MOC113-183-192115-
/O.CON.KLSX.SV.W.0065.000000T0000Z-210619T2115Z/
Calhoun IL-Jersey IL-St. Charles MO-Lincoln MO-
341 PM CDT Sat Jun 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR SOUTHEASTERN CALHOUN...SOUTHWESTERN JERSEY...NORTH CENTRAL ST.
CHARLES AND EAST CENTRAL LINCOLN COUNTIES...

At 340 PM CDT, a severe thunderstorm was located 8 miles east of
Winfield, moving southeast at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Law enforcement reported power lines down in Elsberry.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
St. Charles, Winfield, Grafton, Elsah, Orchard Farms, Batchtown,
Foley, Brussels, Meppen, Deer Plain, Kampville, Golden Eagle and
Beechville.

This also includes Pere Marquette State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3903 9087 3914 9080 3901 9031 3879 9050
TIME...MOT...LOC 2040Z 297DEG 17KT 3901 9058 

HAIL...1.00IN
WIND...60MPH
 
$$

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 5:44 AM CDT	Severe Thunderstorm Warning	LSX	Marion	18 min
Jun 19, 10:45 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	45 min
Jun 19, 2:15 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	31 min
Jun 19, 2:44 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	32 min
Jun 19, 2:52 PM CDT	Severe Thunderstorm Warning	LSX	Pike	38 min
Jun 19, 2:55 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	50 min
Jun 19, 3:21 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	25 min
Jun 19, 4:10 PM CDT	Flash Flood Warning	LSX	Calhoun	6 hr
Jun 19, 4:16 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Madison	44 min
Jun 19, 4:35 PM CDT	Flash Flood Warning	LSX	Calhoun, Greene, Jersey	6 hr
Jun 19, 4:43 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	47 min
Jun 19, 5:17 PM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	43 min
Jun 19, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	35 min
Jun 19, 6:00 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	45 min
Jun 19, 5:09 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	51 min
Jun 19, 5:31 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Ralls	59 min
Jun 19, 5:46 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	59 min
Jun 19, 5:58 PM CDT	Flash Flood Warning	LSX	Marion, Pike, Ralls	6 hr
Jun 19, 6:46 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	44 min
Jun 19, 6:54 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Ralls	51 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2021 Severe Thunderstorm Warnings in Missouri, 2021 Every 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.