Alert archive / Illinois / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 182, NWS St. Louis, MO

July 19, 2018Adams County, Pike County, Illinois; Lewis County, Marion County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 19, 2018, 7:56 PM CDT for Adams County, Pike County, Illinois; Lewis County, Marion County, Missouri. It was in force for 64 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: Jul 19, 2018, 7:56 PM CDT (00:56 UTC)
Expired: Jul 19, 2018, 9:00 PM CDT
In force: 64 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Adams County, IL, Pike County, IL, Lewis County, MO, Marion County, MO

The radar

The St Louis radar (KLSX), 154 km from the middle of the area, began a volume at 01:00 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 19, 8:16 PM CDT	FUNNEL CLOUD	2 N Ewing, MO
Jul 19, 8:16 PM CDT	HAIL 0.88	Monticello, MO
Jul 19, 8:28 PM CDT	HAIL 1.75	La Grange, MO	CORRECTS PREVIOUS HAIL REPORT FROM LA GRANGE. REPORTED RELAYED VIA LEWIS COUNTY 911.
Jul 19, 8:33 PM CDT	HAIL 1	3 Se Ewing, MO	REPORTED IN THE COMMUNITY OF DURHAM.
Jul 19, 8:33 PM CDT	HAIL 1	3 Se Ewing, MO
Jul 19, 8:34 PM CDT	HAIL 1	Maywood, MO	REPORT RELAYED VIA LEWIS COUNTY 911.
Jul 19, 8:35 PM CDT	HAIL 0.5	La Grange, MO
Jul 19, 8:36 PM CDT	HAIL 1.75	La Grange, MO	REPORTED RELAYED VIA LEWIS COUNTY 911.
Jul 19, 8:50 PM CDT	HAIL 1	Quincy, IL	REPORT RELAYED VIA NWS CHAT.

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 19, 6:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.9 hours before the alert went out and 203 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: 1195 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 291 m²/s²
0-3 km storm-relative helicity: 344 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 8.1

Open this sounding in Storm Lab

The text

As transmitted.

398 
WUUS53 KLSX 200056
SVRLSX
ILC001-149-MOC111-127-200200-
/O.NEW.KLSX.SV.W.0182.180720T0056Z-180720T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
756 PM CDT THU JUL 19 2018

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Northwestern Pike County in west central Illinois...
  Western Adams County in west central Illinois...
  Central Marion County in northeastern Missouri...
  Lewis County in northeastern Missouri...

* Until 900 PM CDT.

* At 756 PM CDT, a severe thunderstorm was located near Lewistown,
  moving southeast at 40 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...
  Quincy, Hannibal, Palmyra, Canton, Payson, La Grange, La Belle,
  Lewistown, Fall Creek, Ewing, Maywood, Adams, Burton, Ursa,
  Richfield, Plainville, Taylor, Monticello, Meyer and Marblehead.

This includes the following highways...
 Interstate 172 between exits 2 and 19.
 Interstate 72 near exit 4.

This also includes  Wakonda State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3982 9111 3969 9131 3969 9155 4012 9194
      4025 9162 4025 9156
TIME...MOT...LOC 0056Z 317DEG 36KT 4013 9175 

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

BSH

4 follow-up statements

090 
WWUS53 KLSX 200120
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
820 PM CDT THU JUL 19 2018

ILC001-149-MOC111-127-200200-
/O.CON.KLSX.SV.W.0182.000000T0000Z-180720T0200Z/
Pike IL-Adams IL-Marion MO-Lewis MO-
820 PM CDT THU JUL 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHWESTERN PIKE AND WESTERN ADAMS COUNTIES IN WEST CENTRAL
ILLINOIS...CENTRAL MARION AND SOUTHERN LEWIS COUNTIES IN NORTHEASTERN
MISSOURI...

At 820 PM CDT, a severe thunderstorm was located near Maywood, moving
southeast at 40 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...
Quincy, Hannibal, Palmyra, Canton, Payson, La Grange, Fall Creek,
Ewing, Maywood, Adams, Burton, Ursa, Richfield, Plainville, Taylor,
Meyer, Marblehead and Seehorn.

This also includes  Wakonda State Park.
 
This includes the following highways...
 Interstate 172 between exits 2 and 19.
 Interstate 72 near exit 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3982 9111 3969 9131 3969 9155 4002 9185
      4021 9152
TIME...MOT...LOC 0120Z 317DEG 36KT 3995 9154 

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

BSH

502 
WWUS53 KLSX 200134
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
834 PM CDT THU JUL 19 2018

ILC001-149-MOC111-127-200200-
/O.CON.KLSX.SV.W.0182.000000T0000Z-180720T0200Z/
Pike IL-Adams IL-Marion MO-Lewis MO-
834 PM CDT THU JUL 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHWESTERN PIKE AND SOUTHWESTERN ADAMS COUNTIES IN WEST CENTRAL
ILLINOIS...CENTRAL MARION AND SOUTHEASTERN LEWIS COUNTIES IN
NORTHEASTERN MISSOURI...

At 833 PM CDT, a severe thunderstorm was located near Quincy, moving
southeast at 40 mph.

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

SOURCE...Law enforcement reports quarter size hail.

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

Locations impacted include...
Quincy, Hannibal, Palmyra, Payson, La Grange, Fall Creek, Maywood,
Adams, Burton, Ursa, Richfield, Plainville, Taylor, Marblehead and
Seehorn.

This also includes  Wakonda State Park.
 
This includes the following highways...
 Interstate 172 between exits 2 and 19.
 Interstate 72 near exit 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3982 9111 3969 9131 3969 9155 3994 9178
      4012 9142
TIME...MOT...LOC 0133Z 317DEG 36KT 3985 9142 

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

BSH

756 
WWUS53 KLSX 200141
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
841 PM CDT THU JUL 19 2018

ILC001-149-MOC111-127-200200-
/O.CON.KLSX.SV.W.0182.000000T0000Z-180720T0200Z/
Pike IL-Adams IL-Marion MO-Lewis MO-
841 PM CDT THU JUL 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHWESTERN PIKE AND SOUTHWESTERN ADAMS COUNTIES IN WEST CENTRAL
ILLINOIS...CENTRAL MARION AND SOUTHEASTERN LEWIS COUNTIES IN
NORTHEASTERN MISSOURI...

At 840 PM CDT, a severe thunderstorm was located over Fall Creek,
moving southeast at 40 mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Law enforcement reports quarter size hail.

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...
Quincy, Hannibal, Palmyra, Payson, Fall Creek, Maywood, Adams,
Burton, Ursa, Richfield, Plainville, Taylor, Marblehead and Seehorn.

This also includes  Wakonda State Park.
 
This includes the following highways...
 Interstate 172 between exits 2 and 15.
 Interstate 72 near exit 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3982 9111 3969 9131 3969 9155 3992 9167
      4008 9139
TIME...MOT...LOC 0140Z 317DEG 36KT 3979 9135 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...60MPH
 
$$

BSH

811 
WWUS53 KLSX 200145
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
845 PM CDT THU JUL 19 2018

ILC001-149-MOC111-127-200200-
/O.CON.KLSX.SV.W.0182.000000T0000Z-180720T0200Z/
Pike IL-Adams IL-Marion MO-Lewis MO-
845 PM CDT THU JUL 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHWESTERN PIKE AND SOUTHWESTERN ADAMS COUNTIES IN WEST CENTRAL
ILLINOIS...CENTRAL MARION AND SOUTHEASTERN LEWIS COUNTIES IN
NORTHEASTERN MISSOURI...

At 845 PM CDT, a severe thunderstorm was located over Fall Creek,
moving southeast at 40 mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Law enforcement reported gold ball sized hail in La Grange.

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...
Quincy, Hannibal, Palmyra, Payson, Fall Creek, Maywood, Adams,
Burton, Ursa, Richfield, Plainville, Taylor, Marblehead and Seehorn.

This also includes  Wakonda State Park.
 
This includes the following highways...
 Interstate 172 between exits 2 and 15.
 Interstate 72 near exit 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3982 9111 3969 9131 3969 9155 3992 9167
      4008 9139
TIME...MOT...LOC 0145Z 317DEG 36KT 3975 9131 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...60MPH
 
$$

BSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:04 PM CDT	Severe Thunderstorm Warning	LSX	Adams	56 min
Jul 19, 7:26 PM CDT	Tornado Warning	LSX	Adams	37 min
Jul 19, 7:53 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	67 min
Jul 19, 8:50 PM CDT	Special Weather Statement	LSX	Adams	25 min
Jul 19, 8:54 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	66 min
Jul 19, 8:58 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	62 min
Jul 19, 9:18 PM CDT	Special Weather Statement	LSX	Adams	27 min
Jul 19, 9:38 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey	52 min
Jul 19, 9:41 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	49 min
Jul 19, 10:19 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin, Madison	41 min
Jul 19, 10:59 PM CDT	Special Weather Statement	LSX	Macoupin, Madison	46 min
Jul 19, 11:36 PM CDT	Special Weather Statement	LSX	Bond, Clinton, Fayette, Montgomery	39 min
Jul 20, 12:11 AM CDT	Tornado Warning	LSX	Fayette, Marion	34 min
Jul 20, 12:21 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Marion	39 min
Jul 19, 7:12 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis	48 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2018 Severe Thunderstorm Warnings in Missouri, 2018 Every severe thunderstorm warning 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.