Alert archive / Missouri / Tornado Warnings in 2019

Tornado Warning 15, NWS St. Louis, MO

May 21, 2019Jefferson County, Saint Louis County, City of Saint Louis, Missouri; Monroe County, Saint Clair County, Illinois

NWS St. Louis, MO issued this tornado warning at May 21, 2019, 6:48 PM CDT for Jefferson County, Saint Louis County, City of Saint Louis, Missouri; Monroe County, Saint Clair County, Illinois. It was in force for 42 min. 4 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 21, 2019, 6:48 PM CDT (23:48 UTC)
Expired: May 21, 2019, 7:30 PM CDT
In force: 42 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Monroe County, IL, Saint Clair County, IL, City of Saint Louis, MO, Jefferson County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 47 km from the middle of the area, began a volume at 23:48 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 21, 6:55 PM CDT	TSTM WND DMG	2 Ene Foster Pond, IL	TWO UPROOTED TREES, TWO TREES TOPS ARE TWISTED OFF AND OTHER TREES DOWN AT NEARBY NEIGHBORS HOURS. COULD BE TORNADO DAMAGE.
May 21, 7:01 PM CDT	TSTM WND DMG	Columbia, IL	POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
May 21, 7:01 PM CDT	TORNADO	2 N Waterloo, IL	CORRECTS PREVIOUS TORNADO REPORT FROM 2 N WATERLOO. A WEAK TORNADO CAUSED MINOR STRUCTURAL DAMAGE AND TREE DAMAGE IN THE NORTHERN SECTION OF WATERLOO, IL. THE TORNADO WAS ESTIMATED TO ONLY BE ON THE GROUND FOR A MINUTE AND TRAVELED LESS THAN A HALF MILE.
May 21, 7:15 PM CDT	TSTM WND GST 60	Glendale, 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
May 21, 3:10 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.8 hours before the alert went out and 232 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: 1157 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 331 m²/s²
0-3 km storm-relative helicity: 917 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

542 
WFUS53 KLSX 212348
TORLSX
ILC133-163-MOC099-189-510-220030-
/O.NEW.KLSX.TO.W.0015.190521T2348Z-190522T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
648 PM CDT Tue May 21 2019

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northwestern Monroe County in southwestern Illinois...
  Northwestern St. Clair County in southwestern Illinois...
  St. Louis City in east central Missouri...
  Northeastern Jefferson County in east central Missouri...
  South central St. Louis County in east central Missouri...

* Until 730 PM CDT.

* At 647 PM CDT, multiple areas capable of producing tornadoes were 
  observed along a line extending from Sappington to near Crystal 
  City, moving northeast at 65 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  St. Louis, Belleville, University City, Kirkwood, East St. Louis,
  Webster Groves, Arnold, Clayton, Cahokia, Swansea, Crestwood,
  Waterloo, Columbia, Richmond Heights, Ladue, Sunset Hills, Des
  Peres, Brentwood, Maplewood and Shrewsbury.

This also includes Scott Joplin Historic Site, Mastodon Historic
Site, and Gov. Dunklin's Grave Historic Site.
 
This includes the following highways...
 Interstate 44 in Missouri between exits 276 and 277.
 Interstate 55 in Missouri between exits 187 and 191.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Heavy rainfall may hide these tornadoes. Do not wait to see or hear 
the tornadoes. TAKE COVER NOW!

&&

LAT...LON 3815 9035 3860 9045 3871 9021 3866 9018
      3866 9012 3843 8990
TIME...MOT...LOC 2347Z 216DEG 55KT 3850 9038 3819 9032 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Kanofsky

3 follow-up statements

015 
WWUS53 KLSX 220003
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
703 PM CDT Tue May 21 2019

MOC099-220012-
/O.CAN.KLSX.TO.W.0015.000000T0000Z-190522T0030Z/
Jefferson MO-
703 PM CDT Tue May 21 2019

...THE TORNADO WARNING FOR NORTHEASTERN JEFFERSON COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM CDT for southwestern
Illinois...and east central Missouri.

LAT...LON 3821 9026 3863 9039 3871 9021 3866 9018
      3866 9012 3843 8990
TIME...MOT...LOC 0002Z 216DEG 55KT 3867 9022 3836 9016 

$$

ILC133-163-MOC189-510-220030-
/O.CON.KLSX.TO.W.0015.000000T0000Z-190522T0030Z/
Monroe IL-St. Clair IL-St. Louis City MO-St. Louis MO-
703 PM CDT Tue May 21 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHWESTERN MONROE...NORTHWESTERN ST. CLAIR AND SOUTH CENTRAL ST.
LOUIS COUNTIES AND ST. LOUIS CITY...
    
At 702 PM CDT, severe thunderstorms capable of producing tornadoes
were located along a line extending from near Venice to near
Waterloo, moving northeast at 65 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
St. Louis, Belleville, University City, East St. Louis, Webster
Groves, Clayton, Cahokia, Swansea, Crestwood, Waterloo, Columbia,
Richmond Heights, Ladue, Brentwood, Maplewood, Shrewsbury, Glendale,
Centreville, Freeburg and Washington Park.

This also includes Scott Joplin Historic Site.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3821 9026 3863 9039 3871 9021 3866 9018
      3866 9012 3843 8990
TIME...MOT...LOC 0002Z 216DEG 55KT 3867 9022 3836 9016 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Kanofsky

755 
WWUS53 KLSX 220014
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
714 PM CDT Tue May 21 2019

ILC133-MOC189-510-220024-
/O.CAN.KLSX.TO.W.0015.000000T0000Z-190522T0030Z/
Monroe IL-St. Louis City MO-St. Louis MO-
714 PM CDT Tue May 21 2019

...THE TORNADO WARNING FOR NORTHWESTERN MONROE AND SOUTH CENTRAL ST.
LOUIS COUNTIES AND ST. LOUIS CITY IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM CDT for southwestern
Illinois.

LAT...LON 3843 8990 3834 9006 3836 9008 3866 9018
      3866 9012
TIME...MOT...LOC 0014Z 216DEG 55KT 3879 9010 3848 9004 

$$

ILC163-220030-
/O.CON.KLSX.TO.W.0015.000000T0000Z-190522T0030Z/
St. Clair IL-
714 PM CDT Tue May 21 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHWESTERN ST. CLAIR COUNTY...
    
At 714 PM CDT, severe thunderstorms capable of producing tornadoes
were located along a line extending from near Hartford to near
Millstadt, moving northeast at 65 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Belleville, East St. Louis, Cahokia, Swansea, Centreville, Freeburg,
Washington Park, Millstadt, Madison, Cahokia Parks Airport, Smithton,
Fairmont City, Alorton, Brooklyn, Sauget, Floraville and Paderborn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3843 8990 3834 9006 3836 9008 3866 9018
      3866 9012
TIME...MOT...LOC 0014Z 216DEG 55KT 3879 9010 3848 9004 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

BSH

552 
WWUS53 KLSX 220028
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
728 PM CDT Tue May 21 2019

ILC163-220038-
/O.EXP.KLSX.TO.W.0015.000000T0000Z-190522T0030Z/
St. Clair IL-
728 PM CDT Tue May 21 2019

...THE TORNADO WARNING FOR NORTHWESTERN ST. CLAIR COUNTY WILL EXPIRE
AT 730 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer appear capable of producing a tornado.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 1000 PM CDT for southwestern
Illinois.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of St. Clair County.

LAT...LON 3843 8990 3834 9006 3836 9008 3866 9018
      3866 9012
TIME...MOT...LOC 0028Z 216DEG 55KT 3896 8995 3865 8989 

$$

Kanofsky

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 11:33 PM CDT	Special Weather Statement	LSX	Cole, Osage	42 min
May 21, 12:25 AM CDT	Special Weather Statement	LSX	Crawford, Franklin, Washington	65 min
May 21, 1:32 AM CDT	Special Weather Statement	LSX	Jefferson, Saint Charles, Saint Francois, Saint Louis, City of Saint Louis	43 min
May 21, 2:14 AM CDT	Special Weather Statement	LSX	Sainte Genevieve, Saint Louis, City of Saint Louis	61 min
May 21, 3:40 AM CDT	Flash Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 23 more	20 hr
May 21, 8:10 AM CDT	River Flood Warning	LSX	Lewis	3 days
May 21, 8:10 AM CDT	River Flood Warning	LSX	Lewis	4 days
May 21, 8:10 AM CDT	River Flood Warning	LSX	Marion	4 days
May 21, 8:10 AM CDT	River Flood Warning	LSX	Marion	61 hr
May 21, 8:10 AM CDT	River Flood Warning	LSX	Monroe	4 days
May 21, 10:01 AM CDT	River Flood Warning	LSX	Cole	61 hr
May 21, 11:18 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	42 days
May 21, 11:18 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	41 days
May 21, 12:50 PM CDT	River Flood Warning	LSX	Crawford, Washington	4 days
May 21, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Osage	46 min
May 21, 4:40 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Gasconade, Montgomery, Osage	50 min
May 21, 4:42 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	63 min
May 21, 4:48 PM CDT	Tornado Warning	LSX	Callaway, Gasconade, Montgomery, Osage	27 min
May 21, 5:06 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds, Washington	54 min
May 21, 5:12 PM CDT	Tornado Warning Tornado observed	LSX	Audrain, Callaway, Lincoln, Montgomery, Pike, Warren	48 min
May 21, 5:22 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Saint Charles, Warren, Washington	38 min
May 21, 5:34 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Washington	26 min
May 21, 5:40 PM CDT	Tornado Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	50 min
May 21, 5:54 PM CDT	River Flood Warning	LSX	Cole	41 hr
May 21, 5:57 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	33 min
May 21, 5:59 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Iron, Jefferson, Madison, Reynolds and 3 more	76 min
May 21, 6:19 PM CDT	Tornado Warning Tornado observed	LSX	Saint Charles, Saint Louis	41 min
May 21, 6:32 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Jefferson, Madison, Sainte Genevieve, Saint Francois, Saint Louis and 2 more	88 min
May 21, 6:55 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	50 min

Nearby

Tornado Warnings in Missouri, 2019 Tornado Warnings in Illinois, 2019 Every tornado warning in 2019 Tornadoes in 2019

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.