Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS St. Louis, MO

May 3, 2021Adams County, Illinois; Lewis County, Marion County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 3, 2021, 2:54 PM CDT for Adams County, Illinois; Lewis County, Marion County, Missouri. It was in force for 51 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: May 3, 2021, 2:54 PM CDT (19:54 UTC)
Expired: May 3, 2021, 3:45 PM CDT
In force: 51 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

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

The radar

The St Louis radar (KLSX), 152 km from the middle of the area, began a volume at 19:55 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
May 3, 3:09 PM CDT	HAIL 1	3 Nne Quincy, IL	ONE INCH HAIL REPORTED AT QUINCY WAREHOUSE BARGAINS.
May 3, 3:28 PM CDT	HAIL 1	3 Sw Coatsburg, IL	QUARTER SIZED HAIL SOUTHWEST OF COATSBURG, IL.

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
May 3, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 7.9 hours before the alert went out and 205 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: 29 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 509 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

258 
WUUS53 KLSX 031954
SVRLSX
ILC001-MOC111-127-032045-
/O.NEW.KLSX.SV.W.0032.210503T1954Z-210503T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
254 PM CDT Mon May 3 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Central Adams County in west central Illinois...
  North central Marion County in northeastern Missouri...
  Southeastern Lewis County in northeastern Missouri...

* Until 345 PM CDT.

* At 254 PM CDT, a severe thunderstorm was located near Maywood,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Law Enforcement.

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

* Locations impacted include...
  Quincy, Quincy Regional Airport, Maywood, Adams, Burton, Taylor,
  Coatsburg, Columbus, Paloma and Fowler.

This includes Interstate 172 between exits 10 and 19.
 
This also includes Wakonda State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3986 9172 4001 9160 4008 9110 3983 9113
TIME...MOT...LOC 1954Z 268DEG 33KT 3995 9153 

HAIL...1.25IN
WIND...60MPH
 
$$

Glass

4 follow-up statements

120 
WWUS53 KLSX 032010
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
310 PM CDT Mon May 3 2021

MOC111-127-032019-
/O.CAN.KLSX.SV.W.0032.000000T0000Z-210503T2045Z/
Marion MO-Lewis MO-
310 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MARION AND
SOUTHEASTERN LEWIS COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
west central Illinois.

LAT...LON 4008 9110 3987 9113 3989 9129 3989 9137
      3991 9142 3993 9142 3995 9144 4002 9148
      4003 9145
TIME...MOT...LOC 2009Z 257DEG 42KT 3998 9136 

$$

ILC001-032045-
/O.CON.KLSX.SV.W.0032.000000T0000Z-210503T2045Z/
Adams IL-
310 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR CENTRAL ADAMS COUNTY...

At 309 PM CDT, a severe thunderstorm was located near Quincy, moving
east at 50 mph.

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

SOURCE...Train spotter reported 50 to 60 mph winds in north 
         Quincy.

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

Locations impacted include...
Quincy, Quincy Regional Airport, Burton, Coatsburg, Columbus, Paloma
and Fowler.

This includes Interstate 172 between exits 14 and 19.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4008 9110 3987 9113 3989 9129 3989 9137
      3991 9142 3993 9142 3995 9144 4002 9148
      4003 9145
TIME...MOT...LOC 2009Z 257DEG 42KT 3998 9136 

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

Glass

982 
WWUS53 KLSX 032021
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
321 PM CDT Mon May 3 2021

ILC001-032045-
/O.CON.KLSX.SV.W.0032.000000T0000Z-210503T2045Z/
Adams IL-
321 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR CENTRAL ADAMS COUNTY...

At 321 PM CDT, a severe thunderstorm was located near Quincy Regional
Airport, moving east at 35 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, Quincy Regional Airport, Burton, Coatsburg, Columbus, Paloma
and Fowler.

This includes Interstate 172 between exits 14 and 19.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4008 9110 3989 9113 3990 9129 3990 9136
      3991 9140 3995 9144 4001 9138 4005 9130
TIME...MOT...LOC 2021Z 264DEG 29KT 3999 9124 

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

Glass

740 
WWUS53 KLSX 032032
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
332 PM CDT Mon May 3 2021

ILC001-032045-
/O.CON.KLSX.SV.W.0032.000000T0000Z-210503T2045Z/
Adams IL-
332 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR CENTRAL ADAMS COUNTY...

At 332 PM CDT, a severe thunderstorm was located near Camp Point,
moving east 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, Quincy Regional Airport, Burton, Coatsburg, Columbus, Paloma
and Fowler.

This includes Interstate 172 between exits 14 and 15.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4008 9110 3989 9113 3990 9127 3990 9134
      3995 9133 4000 9128 4003 9122
TIME...MOT...LOC 2032Z 268DEG 33KT 3999 9111 

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

Glass

832 
WWUS53 KLSX 032044
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
344 PM CDT Mon May 3 2021

ILC001-032054-
/O.EXP.KLSX.SV.W.0032.000000T0000Z-210503T2045Z/
Adams IL-
344 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ADAMS COUNTY WILL
EXPIRE AT 345 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
west central Illinois.

LAT...LON 4008 9110 3989 9113 3990 9127 3990 9134
      3995 9133 4000 9128 4003 9122
TIME...MOT...LOC 2044Z 268DEG 33KT 3999 9097 

$$

Glass

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 3:27 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	48 min
May 3, 4:13 PM CDT	Severe Thunderstorm Warning	LSX	Brown	28 min
May 3, 6:13 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	47 min
May 3, 6:32 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	32 min
May 3, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	23 min
May 3, 2:22 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion, Shelby	38 min
May 3, 2:42 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion	29 min

Nearby

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