Alert archive / Missouri / Tornado Warnings in 2019

Tornado Warning 11, NWS St. Louis, MO

May 21, 20194 counties in Missouri

NWS St. Louis, MO issued this tornado warning at May 21, 2019, 4:48 PM CDT for 4 counties in Missouri. It was in force for 27 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, 4:48 PM CDT (21:48 UTC)
Expired: May 21, 2019, 5:15 PM CDT
In force: 27 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Callaway County, MO, Gasconade County, MO, Montgomery County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 107 km from the middle of the area, began a volume at 21:50 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, 4:56 PM CDT	TSTM WND DMG	4 Ese Kingdom City, MO	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 7 SSE MURRY. MANY LIMBS OVER HIGHWAY JJ IN NORTHERN CALLAWAY COUNTY SOUTHEAST OF AUXVASSE. TIME ESTIMATED FROM RADAR.
May 21, 5:04 PM CDT	TSTM WND DMG	Fulton, MO	TREE DOWN INTO HOUSE.
May 21, 5:05 PM CDT	TORNADO	5 Ssw Williamsburg, MO	THE WEAK TORNADO TOUCHED DOWN NORTHWEST OF THE INTERSECTION OF COUNTY ROAD 170 AND COUNTY ROAD 171 DESTROYING A SMALL BARN AND CAUSING TREE DAMAGE. THE TORNADO CONTINUE NORTHEAST WIDENING TO A WIDTH OF 250 YARDS AND CAUSING MORE TREE DAMAGE BEFORE LIFTING NEAR
May 21, 5:07 PM CDT	TSTM WND DMG	5 Wsw Shamrock, MO	EQUIPMENT SHED DESTROYED.
May 21, 5:11 PM CDT	TORNADO	5 Se Auxvasse, MO	FIRE STATION CALLED TO REPORT TORNADO ON THE GROUND.

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

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 268 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: 1076 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 401 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

502 
WFUS53 KLSX 212148
TORLSX
MOC027-073-139-151-212215-
/O.NEW.KLSX.TO.W.0011.190521T2148Z-190521T2215Z/

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

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southwestern Montgomery County in east central Missouri...
  Callaway County in central Missouri...
  Northeastern Osage County in central Missouri...
  Northwestern Gasconade County in east central Missouri...

* Until 515 PM CDT.
    
* At 447 PM CDT, severe thunderstorms capable of producing a tornado
  were located along a line extending from near Columbia Regional
  Airport to near Chamois to near Linn, moving northeast at 55 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.

* These dangerous storms will be near...
  Auxvasse around 505 PM CDT.
  Mineola and Williamsburg around 510 PM CDT.

Other locations impacted by these tornadic storms include Gasconade,
Portland, Morrison, Carrington, Hatton, Americus, Frankenstein,
Guthrie, Reform and Steedman.

This also includes Graham Cave State Park.
 
This includes Interstate 70 in Missouri between exits 144 and 161.
 
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.

This line of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3881 9213 3882 9214 3906 9203 3906 9178
      3893 9156 3864 9146 3844 9185 3859 9192
      3879 9216
TIME...MOT...LOC 2147Z 220DEG 47KT 3889 9221 3867 9185 3850 9179 

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

$$

BSH

2 follow-up statements

639 
WWUS53 KLSX 212158
SVSLSX

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

MOC027-073-139-151-212215-
/O.CON.KLSX.TO.W.0011.000000T0000Z-190521T2215Z/
Montgomery MO-Callaway MO-Osage MO-Gasconade MO-
458 PM CDT Tue May 21 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR
SOUTHWESTERN MONTGOMERY...CALLAWAY...NORTHEASTERN OSAGE AND
NORTHWESTERN GASCONADE COUNTIES...
    
At 458 PM CDT, severe thunderstorms capable of producing tornadoes
were located along a line extending from 6 miles south of Murry to
near Chamois to 8 miles northwest of Mount Sterling, moving northeast
at 45 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.

These dangerous storms will be near...
  Auxvasse, Mineola and Williamsburg around 515 PM CDT.

Other locations impacted by these tornadic storms include Gasconade,
Hatton, Portland, Americus, Morrison, Reform, Steedman, Kingdom City
and Rhineland.

This also includes Graham Cave State Park.
 
This includes Interstate 70 in Missouri between exits 144 and 161.
 
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.

This line of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3906 9203 3906 9178 3893 9156 3864 9146
      3848 9177 3869 9185 3886 9211
TIME...MOT...LOC 2158Z 221DEG 41KT 3895 9214 3873 9178 3856 9172 

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

$$

BSH

372 
WWUS53 KLSX 212206
SVSLSX

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

MOC027-073-139-151-212215-
/O.CON.KLSX.TO.W.0011.000000T0000Z-190521T2215Z/
Montgomery MO-Callaway MO-Osage MO-Gasconade MO-
506 PM CDT Tue May 21 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR
SOUTHWESTERN MONTGOMERY...NORTHEASTERN CALLAWAY...NORTHEASTERN OSAGE
AND NORTHWESTERN GASCONADE COUNTIES...
    
At 506 PM CDT, severe thunderstorms capable of producing tornadoes
were located along a line extending from 6 miles east of Murry to 7
miles south of Williamsburg to 7 miles east of Chamois, moving
northeast at 55 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.

These dangerous storms will be near...
  Auxvasse around 510 PM CDT.
  Mineola and Williamsburg around 515 PM CDT.

Other locations impacted by these tornadic storms include Gasconade,
Hatton, Portland, Americus, Morrison, Kingdom City and Rhineland.

This also includes Graham Cave State Park.
 
This includes Interstate 70 in Missouri between exits 148 and 161.
 
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.

This line of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3906 9203 3906 9178 3893 9156 3864 9146
      3852 9169 3879 9177 3899 9205
TIME...MOT...LOC 2206Z 220DEG 47KT 3903 9206 3881 9170 3864 9164 

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

$$

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, 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, 6:48 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 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.