Alert archive / Missouri / Tornado Warnings in 2019

Tornado Warning 14, NWS St. Louis, MO

May 21, 2019Saint Charles County, Saint Louis County, Missouri; Calhoun County, Illinois

NWS St. Louis, MO issued this tornado warning at May 21, 2019, 6:19 PM CDT for Saint Charles County, Saint Louis County, Missouri; Calhoun County, Illinois. It was in force for 41 min. 5 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, 6:19 PM CDT (23:19 UTC)
Expired: May 21, 2019, 7:00 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Observed
Hail: 1.5 in

Counties Calhoun County, IL, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 22 km from the middle of the area, began a volume at 23:18 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, 6:25 PM CDT	TSTM WND DMG	1 Nw Cottleville, MO	LARGE TREE BRANCHES DOWN ALONG KNAUST RD NEAR AVONDALE DR.
May 21, 6:32 PM CDT	HAIL 1	1 Nw Saint Peters, MO
May 21, 6:34 PM CDT	FUNNEL CLOUD	3 E Harvester, MO	FUNNEL CLOUD SPOTTED.
May 21, 6:42 PM CDT	HAIL 0.88	1 Ese Saint Charles, MO
May 21, 6:50 PM CDT	FUNNEL CLOUD	1 Ssw Bridgeton, 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, 11.3 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: 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.

977 
WFUS53 KLSX 212319
TORLSX
ILC013-MOC183-189-220000-
/O.NEW.KLSX.TO.W.0014.190521T2319Z-190522T0000Z/

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

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Calhoun County in southwestern Illinois...
  Central St. Charles County in east central Missouri...
  St. Louis County in east central Missouri...

* Until 700 PM CDT.

* At 619 PM CDT, a confirmed tornado was located over Weldon Spring,
  moving northeast at 45 mph.

  HAZARD...Damaging tornado and ping pong ball size hail.

  SOURCE...Weather spotters confirmed tornado.

  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.

* The tornado will be near...
  St. Peters, Town and Country and Harvester around 625 PM CDT.
  St. Charles, Maryland Heights, Lambert-St. Louis International 
  Airport and Champ around 635 PM CDT.
  Hazelwood, St. Ann, Bridgeton, Berkeley, Lambert Field, Calverton 
  Park, Edmundson and Orchard Farms around 640 PM CDT.
  Florissant and Ferguson around 645 PM CDT.
  Black Jack, Spanish Lake, West Alton and Portage Des Sioux around 
  650 PM CDT.
  Alton around 700 PM CDT.

Other locations impacted by this tornadic thunderstorm include Golden
Eagle, Deer Plain, Kampville and Brussels.

This also includes Babler Memorial State Park, Confluence State Park,
and First Missouri State Capitol Historic Site.
 
This includes Interstate 70 in Missouri between exits 214 and 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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.

&&

LAT...LON 3881 9012 3858 9048 3851 9067 3861 9073
      3864 9073 3863 9075 3875 9087 3892 9064
      3896 9054 3895 9052 3897 9048 3896 9041
      3892 9031 3891 9023 3886 9014 3883 9011
TIME...MOT...LOC 2319Z 232DEG 40KT 3870 9066 

TORNADO...OBSERVED
HAIL...1.50IN

$$

BSH

1 follow-up statement

991 
WWUS53 KLSX 212342
SVSLSX

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

ILC013-MOC183-189-220000-
/O.CON.KLSX.TO.W.0014.000000T0000Z-190522T0000Z/
Calhoun IL-St. Charles MO-St. Louis MO-
642 PM CDT Tue May 21 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHEASTERN CALHOUN...NORTHEASTERN ST. CHARLES AND NORTHEASTERN ST.
LOUIS COUNTIES...
    
At 641 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Orchard Farms, moving northeast at 45 mph.

HAZARD...Tornado and quarter size hail.

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.

This dangerous storm will be near...
  Black Jack, West Alton and Portage Des Sioux around 650 PM CDT.

Other locations impacted by this tornadic thunderstorm include Golden
Eagle, Deer Plain, Kampville and Brussels.

This also includes Confluence State Park and First Missouri State
Capitol Historic Site.
 
This includes Interstate 70 in Missouri between exits 227 and 231.
 
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.

&&

LAT...LON 3881 9012 3865 9043 3892 9064 3896 9054
      3895 9052 3897 9048 3896 9041 3892 9031
      3891 9023 3886 9014 3883 9011
TIME...MOT...LOC 2341Z 232DEG 40KT 3886 9040 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BSH

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, 6:32 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Jefferson, Madison, Sainte Genevieve, Saint Francois, Saint Louis and 2 more	88 min
May 21, 6:48 PM CDT	Tornado Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	42 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.