Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 116, NWS St. Louis, MO

July 9, 2021Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 9, 2021, 8:58 PM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 62 min. 13 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 9, 2021, 8:58 PM CDT (01:58 UTC)
Expired: Jul 9, 2021, 10:00 PM CDT
In force: 62 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 36 km from the middle of the area, began a volume at 02:00 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 9, 9:14 PM CDT	HAIL 0.25	Bridgeton, MO
Jul 9, 9:18 PM CDT	HAIL 1.25	1 Ssw Bridgeton, MO	REPORT NEAR I-70 AND I-270 INTERCHANGE.
Jul 9, 9:20 PM CDT	HAIL 1	Bridgeton, MO
Jul 9, 9:21 PM CDT	HAIL 1	Overland, MO
Jul 9, 9:21 PM CDT	HAIL 1	Saint Ann, MO
Jul 9, 9:22 PM CDT	HAIL 2	2 Ese Maryland Heights, MO	FACEBOOK PICTURE OF 2 INCH HAIL.
Jul 9, 9:23 PM CDT	HAIL 0.88	2 E Maryland Heights, MO
Jul 9, 9:23 PM CDT	HAIL 1.75	2 S Bridgeton, MO	REPORTED NEAR PARKWOOD AND ST. CHARLES ROCK ROAD.
Jul 9, 9:27 PM CDT	TSTM WND GST 60	2 E Maryland Heights, MO	HAM OPERATOR RELAYED A REPORT OF 60 MPH WIND (ESTIMATED) NEAR DORSETT AND 270.
Jul 9, 9:31 PM CDT	HAIL 1.25	2 Nne Creve Coeur, MO	REPORT FROM MPING: HALF DOLLAR (1.25 IN.).
Jul 9, 9:32 PM CDT	HAIL 1.75	1 N Creve Coeur, MO	REPORT FROM MPING: GOLF BALL (1.75 IN.).
Jul 9, 9:32 PM CDT	HAIL 2	2 N Creve Coeur, MO	REPORT TAKEN BETWEEN SCHULTE ROAD AND CRAIG ROAD.
Jul 9, 9:42 PM CDT	HAIL 1	1 Ene Creve Coeur, MO

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 9, 8:18 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.0 hours before the alert went out and 211 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: 1282 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

816 
WUUS53 KLSX 100158
SVRLSX
MOC183-189-100300-
/O.NEW.KLSX.SV.W.0116.210710T0158Z-210710T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
858 PM CDT Fri Jul 9 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  North central St. Charles County in east central Missouri...
  Northeastern St. Louis County in east central Missouri...

* Until 1000 PM CDT.

* At 857 PM CDT, a severe thunderstorm was located near St. Charles,
  moving southeast at 20 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Maryland Heights around 905 PM CDT.
  Florissant, Hazelwood, Bridgeton and Champ around 915 PM CDT.

Other locations in the path of this severe thunderstorm include
Lambert-St. Louis International Airport, Overland, St. Ann, Berkeley,
Breckenridge Hills, Calverton Park, Edmundson, Ferguson, Creve Coeur,
Ladue, Olivette, Black Jack, St. John, Woodson Terrace, Kinloch,
Dellwood, Normandy, Frontenac, Bel-Ridge, Cool Valley, Spanish Lake,
Hanley Hills, Vinita Park, Charlack, Sycamore Hills, University City,
Clayton, Jennings, Bellefontaine Neighbors, Northwoods, Pagedale,
Moline Acres, Bel-Nor, Velda City, Country Club Hills, St. Louis,
Riverview, Hillsdale, Pine Lawn, Wellston, Velda Village Hills,
Uplands Park and Glasgow Village.

This includes Interstate 70 in Missouri between exits 229 and 231.
 
This also includes First Missouri State Capitol Historic Site.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3877 9017 3877 9018 3875 9019 3873 9022
      3872 9025 3870 9026 3862 9040 3885 9055
      3892 9046 3879 9013
TIME...MOT...LOC 0157Z 311DEG 16KT 3883 9047 

HAIL...1.00IN
WIND...<50MPH
 
$$

CVKING

4 follow-up statements

702 
WWUS53 KLSX 100215
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
915 PM CDT Fri Jul 9 2021

MOC183-100225-
/O.CAN.KLSX.SV.W.0116.000000T0000Z-210710T0300Z/
St. Charles MO-
915 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ST. CHARLES
COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3874 9021 3872 9025 3869 9027 3862 9040
      3876 9049 3877 9048 3880 9047 3883 9044
      3883 9043 3882 9037 3884 9035
TIME...MOT...LOC 0215Z 335DEG 16KT 3876 9043 

$$

MOC189-100300-
/O.CON.KLSX.SV.W.0116.000000T0000Z-210710T0300Z/
St. Louis MO-
915 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR NORTHEASTERN ST. LOUIS COUNTY...

At 915 PM CDT, a severe thunderstorm was located over Bridgeton,
moving southeast at 20 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
  Ferguson, Berkeley, Lambert-St. Louis International Airport, 
  Calverton Park, St. Ann, Dellwood, Woodson Terrace, Kinloch, 
  Breckenridge Hills, Edmundson, Creve Coeur, Overland, Jennings, 
  St. John, Normandy, Bel-Ridge, Cool Valley, Charlack, Bellerive, 
  Ladue, Olivette, Northwoods, Hanley Hills, Vinita Park, Bel-Nor, 
  Country Club Hills, Norwood Court, Pasadena Hills, Flordell Hills, 
  University City, Frontenac, Hillsdale, Pagedale, Pine Lawn, 
  Wellston, Velda City, Velda Village Hills, Uplands Park, Glen Echo 
  Park and Clayton.

This includes Interstate 70 in Missouri near exit 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3874 9021 3872 9025 3869 9027 3862 9040
      3876 9049 3877 9048 3880 9047 3883 9044
      3883 9043 3882 9037 3884 9035
TIME...MOT...LOC 0215Z 335DEG 16KT 3876 9043 

HAIL...1.50IN
WIND...<50MPH
 
$$

CVKING

198 
WWUS53 KLSX 100222
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
922 PM CDT Fri Jul 9 2021

MOC189-100300-
/O.CON.KLSX.SV.W.0116.000000T0000Z-210710T0300Z/
St. Louis MO-
922 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR NORTHEASTERN ST. LOUIS COUNTY...

At 922 PM CDT, a severe thunderstorm was located over St. Ann, moving
south at 25 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Trained weather spotters have reported severe hail in north 
         St. Louis County with this thunderstorm.

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

Locations impacted include...
University City, Maryland Heights, Hazelwood, Ferguson, Creve Coeur,
Overland, Clayton, Jennings, St. Ann, Bridgeton, Berkeley, Ladue,
Olivette, St. John, Normandy, Northwoods, Woodson Terrace, Frontenac,
Bel-Ridge and Hillsdale.

This includes Interstate 70 in Missouri near exit 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 200 AM CDT for east central
Missouri.

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

&&

LAT...LON 3872 9025 3869 9027 3862 9040 3876 9049
      3879 9042 3877 9034
TIME...MOT...LOC 0222Z 352DEG 23KT 3872 9042 

HAIL...1.50IN
WIND...<50MPH
 
$$

CVKING

196 
WWUS53 KLSX 100224
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
924 PM CDT Fri Jul 9 2021

MOC189-100300-
/O.CON.KLSX.SV.W.0116.000000T0000Z-210710T0300Z/
St. Louis MO-
924 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR CENTRAL ST. LOUIS COUNTY...

At 924 PM CDT, a severe thunderstorm was located over St. Ann, moving
south at 15 mph.

HAZARD...Golf ball size hail.

SOURCE...Trained weather spotters.

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

Locations impacted include...
University City, Maryland Heights, Hazelwood, Ferguson, Creve Coeur,
Overland, Clayton, Jennings, St. Ann, Bridgeton, Berkeley, Ladue,
Olivette, St. John, Normandy, Northwoods, Woodson Terrace, Frontenac,
Bel-Ridge and Hillsdale.

This includes Interstate 70 in Missouri near exit 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 200 AM CDT for east central
Missouri.

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

&&

LAT...LON 3872 9025 3869 9027 3862 9040 3876 9049
      3878 9041
TIME...MOT...LOC 0224Z 343DEG 14KT 3871 9043 

HAIL...1.75IN
WIND...<50MPH
 
$$

CVKING

750 
WWUS53 KLSX 100233
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
933 PM CDT Fri Jul 9 2021

MOC189-100300-
/O.CON.KLSX.SV.W.0116.000000T0000Z-210710T0300Z/
St. Louis MO-
933 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR CENTRAL ST. LOUIS COUNTY...

At 933 PM CDT, a severe thunderstorm was located over Creve Coeur,
moving south at 15 mph.

HAZARD...Two inch hail near Maryland Heights.

SOURCE...Trained weather spotters.

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

Locations impacted include...
University City, Maryland Heights, Creve Coeur, Overland, Clayton,
St. Ann, Bridgeton, Ladue, Olivette, St. John, Normandy, Northwoods,
Woodson Terrace, Frontenac, Bel-Ridge, Hillsdale, Breckenridge Hills,
Pagedale, Pine Lawn and Wellston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 200 AM CDT for east central
Missouri.

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

&&

LAT...LON 3869 9027 3862 9040 3873 9047 3874 9039
TIME...MOT...LOC 0233Z 346DEG 14KT 3867 9043 

HAIL...2.00IN
WIND...<50MPH
 
$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:21 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion	39 min
Jul 9, 8:55 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Ralls	50 min
Jul 9, 9:00 PM CDT	Severe Thunderstorm Warning	LSX	Knox	45 min
Jul 9, 9:08 PM CDT	Areal Flood Advisory	LSX	Lewis, Marion	32 min
Jul 9, 9:10 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis, Marion, Shelby	65 min
Jul 9, 9:14 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	48 min
Jul 9, 9:36 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Monroe, Pike, Ralls, Shelby	54 min
Jul 9, 9:40 PM CDT	Flash Flood Warning	LSX	Lewis, Marion	3 hr
Jul 9, 10:10 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Monroe, Pike, Ralls	50 min
Jul 9, 10:32 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Shelby	23 min
Jul 9, 10:45 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Lincoln, Montgomery, Pike, Warren	45 min
Jul 9, 11:08 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Osage, Warren	67 min
Jul 9, 11:10 PM CDT	River Flood Warning	LSX	Lewis	5 days
Jul 9, 11:10 PM CDT	River Flood Warning	LSX	Lewis	32 hr
Jul 9, 11:10 PM CDT	River Flood Warning	LSX	Marion	4 days
Jul 9, 11:24 PM CDT	Areal Flood Advisory	LSX	Audrain, Marion, Monroe, Pike, Ralls, Shelby	3 hr
Jul 9, 11:28 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	47 min
Jul 9, 11:57 PM CDT	Areal Flood Advisory	LSX	Lincoln, Pike	3 hr
Jul 9, 11:59 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more	61 min
Jul 10, 12:26 AM CDT	Areal Flood Advisory	LSX	Lincoln, Saint Charles	3 hr
Jul 10, 12:41 AM CDT	Areal Flood Advisory	LSX	Saint Louis, City of Saint Louis	3 hr
Jul 10, 12:42 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	63 min
Jul 10, 1:08 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	52 min
Jul 10, 1:49 AM CDT	River Flood Warning	LSX	Marion	18 hr
Jul 10, 1:50 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois, Washington	40 min
Jul 10, 2:29 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	21 min
Jul 10, 6:14 AM CDT	River Flood Warning	LSX	Monroe	4 days
Jul 10, 8:30 AM CDT	River Flood Warning	LSX	Lincoln	3 days
Jul 10, 2:15 PM CDT	Areal Flood Advisory	LSX	Saint Charles, Saint Louis	3 hr

Nearby

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.