Alert archive / Missouri / Tornado Warnings in 2023

Tornado Warning 12, NWS St. Louis, MO

April 15, 2023Crawford County, Franklin County, Gasconade County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 15, 2023, 4:36 PM CDT for Crawford County, Franklin County, Gasconade County, Missouri. It was in force for 39 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: Apr 15, 2023, 4:36 PM CDT (21:36 UTC)
Expired: Apr 15, 2023, 5:15 PM CDT
In force: 39 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Crawford County, MO, Franklin County, MO, Gasconade County, MO

The radar

The St Louis radar (KLSX), 87 km from the middle of the area, began a volume at 21:38 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
Apr 15, 4:55 PM CDT	HAIL 2	Bland, MO	VERY HIGH WINDS ALSO REPORTED BY LAW ENFORCEMENT.
Apr 15, 5:06 PM CDT	TSTM WND DMG	4 Nw Oak Hill, MO	PHOTO ON TWITTER SHOWS LARGE TREE DOWN ACROSS HIGHWAY 19. TIME ESTIMATED FROM RADAR.
Apr 15, 5:06 PM CDT	HAIL 1	1 Wnw Cuba, MO	REPORT FROM MPING: QUARTER (1.00 IN.).
Apr 15, 5:12 PM CDT	HAIL 0.5	1 Nnw Cuba, MO	REPORT FROM MPING: HALF-INCH (0.50 IN.).
Apr 15, 5:14 PM CDT	HAIL 0.75	1 S Owensville, MO	REPORT FROM MPING: DIME (0.75 IN.).

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
Apr 15, 12:48 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 15, 4:03 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.6 hours before the alert went out and 252 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: 382 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

461 
WFUS53 KLSX 152136
TORLSX
MOC055-071-073-152215-
/O.NEW.KLSX.TO.W.0012.230415T2136Z-230415T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
436 PM CDT Sat Apr 15 2023

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northern Crawford County in east central Missouri...
  Southwestern Franklin County in east central Missouri...
  Southern Gasconade County in east central Missouri...

* Until 515 PM CDT.
    
* At 436 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles east of Vienna, moving northeast at 40 mph.

  HAZARD...Tornado and golf ball 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.

* Locations impacted include...
  Owensville.

This also includes Onondaga Cave State Park.
 
This includes Interstate 44 in Missouri between exits 203 and 218.
 
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 3842 9139 3804 9119 3804 9153 3815 9153
      3815 9164 3830 9165
TIME...MOT...LOC 2136Z 245DEG 34KT 3816 9182 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN

$$

MRB

2 follow-up statements

852 
WWUS53 KLSX 152149
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
449 PM CDT Sat Apr 15 2023

MOC055-071-073-152215-
/O.CON.KLSX.TO.W.0012.000000T0000Z-230415T2215Z/
Crawford MO-Franklin MO-Gasconade MO-
449 PM CDT Sat Apr 15 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR NORTHERN
CRAWFORD...SOUTHWESTERN FRANKLIN AND SOUTHERN GASCONADE COUNTIES...
    
At 449 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Belle, moving northeast at 40 mph.

HAZARD...Tornado and ping pong ball 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.

Locations impacted include...
Cuba, Owensville, Bourbon, Bland, Rosebud, Leasburg, Canaan, Japan,
and Oak Hill.

This also includes Onondaga Cave State Park.
 
This includes Interstate 44 in Missouri between exits 203 and 218.
 
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 3842 9139 3804 9119 3804 9153 3815 9153
      3815 9164 3830 9165
TIME...MOT...LOC 2149Z 239DEG 35KT 3820 9165 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN

$$

MRB

051 
WWUS53 KLSX 152156
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
456 PM CDT Sat Apr 15 2023

MOC055-071-073-152215-
/O.CON.KLSX.TO.W.0012.000000T0000Z-230415T2215Z/
Crawford MO-Franklin MO-Gasconade MO-
456 PM CDT Sat Apr 15 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR NORTHERN
CRAWFORD...SOUTHWESTERN FRANKLIN AND SOUTHERN GASCONADE COUNTIES...
    
At 456 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bland, moving northeast at 40 mph.

HAZARD...Tornado and ping pong ball size hail.

SOURCE...Radar indicated rotation. Law enforcement also reported 
         tennis ball sized hail in Bland, Missouri.

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...
Cuba, Owensville, Bourbon, Bland, Rosebud, Leasburg, Canaan, Japan,
and Oak Hill.

This also includes Onondaga Cave State Park.
 
This includes Interstate 44 in Missouri between exits 203 and 218.
 
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 3815 9153 3815 9164 3830 9165 3842 9139
      3804 9119 3804 9153
TIME...MOT...LOC 2156Z 245DEG 34KT 3823 9157 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN

$$

MRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 3:48 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Warren	42 min
Apr 15, 3:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Cole, Osage	51 min
Apr 15, 4:28 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Franklin, Gasconade, Montgomery, Warren	47 min
Apr 15, 4:43 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	35 min
Apr 15, 4:55 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	50 min
Apr 15, 4:58 PM CDT	Areal Flood Advisory	LSX	Osage	3 hr
Apr 15, 5:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Crawford, Franklin, Gasconade, Washington	47 min
Apr 15, 5:28 PM CDT	Flash Flood Warning	LSX	Franklin	5 hr
Apr 15, 5:31 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Louis	44 min
Apr 15, 5:47 PM CDT	Areal Flood Advisory	LSX	Franklin, Gasconade	3 hr
Apr 15, 5:52 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis, Washington	38 min
Apr 15, 6:07 PM CDT	Tornado Warning	LSX	Franklin, Jefferson	35 min
Apr 15, 6:11 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis	49 min
Apr 15, 6:13 PM CDT	Flash Flood Warning	LSX	Franklin	4 hr
Apr 15, 6:17 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	43 min
Apr 15, 6:19 PM CDT	Tornado Warning	LSX	Saint Louis, City of Saint Louis	41 min
Apr 15, 6:23 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	53 min
Apr 15, 6:27 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	52 min
Apr 15, 6:34 PM CDT	Tornado Warning	LSX	Jefferson	41 min
Apr 15, 6:36 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	39 min
Apr 15, 6:39 PM CDT	Flash Flood Warning	LSX	Jefferson, Saint Louis	4 hr
Apr 15, 6:39 PM CDT	Tornado Warning	LSX	Saint Louis, City of Saint Louis	51 min

Nearby

Tornado Warnings in Missouri, 2023 Every tornado warning in 2023 Tornadoes in 2023

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.