Alert archive / Missouri / Tornado Warnings in 2026

Tornado Warning 19, NWS St. Louis, MO

April 17, 20264 counties in Missouri

NWS St. Louis, MO issued this tornado warning at Apr 17, 2026, 7:42 PM CDT for 4 counties in Missouri. It was in force for 48 min. 6 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 17, 2026, 7:42 PM CDT (00:42 UTC)
Expired: Apr 17, 2026, 8:30 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO

The radar

The St Louis radar (KLSX), 147 km from the middle of the area, began a volume at 00:43 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 17, 8:08 PM CDT	TORNADO	2 S Marion, MO	Corrects previous tornado report from 2 SSE Marion. High-resolution satellite imagery revealed 2 seperate tornado tracks. This 3.5 mile track ran from 2 S Marion, MO to Hartsburg, MO. This tornado was rated EF-0.
Apr 17, 8:08 PM CDT	TORNADO	2 Sse Marion, MO	NWS survey team found an EF-0 tornado from near the Missouri River, northeastward through Hartsburg, ending near Fulton. The tornado produced mainly tree damage along its 23.7 mi track, but also partially uplifted the rood of an airport hanger.
Apr 17, 8:09 PM CDT	TSTM WND DMG	Hartsburg, MO	Small tree, 6-8 inches in diameter, broken near base. Time estimated from radar.
Apr 17, 8:09 PM CDT	TORNADO	Hartsburg, MO	Corrects previous tstm wnd dmg report from Hartsburg. Small tree, 6-8 inches in diameter, broken near base. Time estimated from radar.
Apr 17, 8:20 PM CDT	TSTM WND DMG	2 Sse Marion, MO	Tree limb down near 179 and Sunflower Road. Time estimated from radar.
Apr 17, 8:20 PM CDT	TORNADO	2 Sse Marion, MO	Corrects previous tstm wnd dmg report from 2 SSE Marion. Tree limb down near 179 and Sunflower Road. Time estimated from radar.

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 17, 3:31 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.7 hours before the alert went out and 225 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: 404 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 1486 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 418 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

As transmitted.

427 
WFUS53 KLSX 180042
TORLSX
MOC019-027-051-135-180130-
/O.NEW.KLSX.TO.W.0019.260418T0042Z-260418T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
742 PM CDT Fri Apr 17 2026

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Boone County in central Missouri...
  Southwestern Callaway County in central Missouri...
  Northern Cole County in central Missouri...
  Southern Moniteau County in central Missouri...

* Until 830 PM CDT.

* At 742 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over High Point, or 10 miles south of California,
  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 tornado will be near...
  High Point around 745 PM CDT.
  Russellville, McGirk and California around 755 PM CDT.
  Centertown around 800 PM CDT.

Other locations impacted by the tornado include Latham, Enon, Lohman,
Elston, Marion, Hartsburg, Wainwright and Guthrie.

This includes the following State Parks...
Jefferson Landing Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built building
away from 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 3856 9279 3889 9219 3859 9195 3859 9198
      3857 9201 3843 9261 3843 9262
TIME...MOT...LOC 0042Z 245DEG 39KT 3850 9262

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore

2 follow-up statements

216 
WWUS53 KLSX 180101
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
801 PM CDT Fri Apr 17 2026

MOC019-027-051-135-180130-
/O.CON.KLSX.TO.W.0019.000000T0000Z-260418T0130Z/
Boone MO-Callaway MO-Cole MO-Moniteau MO-
801 PM CDT Fri Apr 17 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHEASTERN BOONE, SOUTHWESTERN CALLAWAY, NORTHERN COLE AND SOUTHERN
MONITEAU COUNTIES...

At 801 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Centertown, or 8 miles southeast of California,
moving northeast at 40 mph. Another storm with rotation is moving
into southern Moniteau County.

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 tornado will be near...
  Centertown, McGirk, Russellville and California around 805 PM CDT.
  St. Martins around 810 PM CDT.
  Jefferson City around 815 PM CDT.

Other locations impacted by the tornado include Lohman, Elston,
Marion, Hartsburg, Wilton and Guthrie.

This includes the following State Parks...
Jefferson Landing Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built building
away from 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.

Tornadoes are difficult to observe at night. Take cover now!

&&

LAT...LON 3856 9279 3889 9219 3859 9195 3859 9198
      3857 9201 3843 9261 3843 9262
TIME...MOT...LOC 0042Z 240DEG 34KT 3850 9263

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore

919 
WWUS53 KLSX 180118
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
818 PM CDT Fri Apr 17 2026

MOC019-027-051-135-180130-
/O.CON.KLSX.TO.W.0019.000000T0000Z-260418T0130Z/
Boone MO-Callaway MO-Cole MO-Moniteau MO-
818 PM CDT Fri Apr 17 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHEASTERN BOONE, SOUTHWESTERN CALLAWAY, NORTHERN COLE AND
SOUTHEASTERN MONITEAU COUNTIES...

At 818 PM CDT, a severe thunderstorm capable of producing a tornado
was located 6 miles south of Ashland, moving northeast at 45 mph.
Another area of rotation is located west of Russellville.

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.

This tornado will be near...
  Holts Summit, Ashland and Jefferson City around 820 PM CDT.
  New Bloomfield, Lake Mykee Town, Lake Mykee and Columbia Regional
  Airport around 825 PM CDT.

Other locations impacted by the tornado include Hartsburg and
Guthrie.

This includes the following State Parks...
Jefferson Landing Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built building
away from 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.

Tornadoes are difficult to observe at night. Take cover now!

&&

LAT...LON 3862 9268 3889 9219 3859 9195 3859 9198
      3857 9201 3845 9250
TIME...MOT...LOC 0101Z 237DEG 39KT 3860 9242

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN

$$

Elmore

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 7:21 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Marion, Monroe, Pike, Ralls	54 min
Apr 17, 7:57 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Boone, Callaway, Cole, Moniteau, Osage	63 min
Apr 17, 8:17 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole, Moniteau	43 min
Apr 17, 8:30 PM CDT	Tornado Warning	LSX	Callaway, Cole, Osage	45 min
Apr 17, 8:45 PM CDT	Tornado Warning	LSX	Audrain, Callaway, Montgomery	45 min
Apr 17, 8:57 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Osage, Warren	48 min
Apr 17, 9:23 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike	52 min
Apr 17, 9:29 PM CDT	Tornado Warning	LSX	Lincoln, Montgomery, Warren	31 min
Apr 17, 9:36 PM CDT	Tornado Warning Tornado observed	LSX	Warren	20 min
Apr 17, 9:42 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	48 min
Apr 17, 9:50 PM CDT	Tornado Warning	LSX	Lincoln	25 min
Apr 17, 10:02 PM CDT	River Flood Warning	LSX	Lewis	12 days
Apr 17, 10:14 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	31 min
Apr 18, 12:52 AM CDT	River Flood Warning	LSX	Lewis	11 hr
Apr 18, 6:04 AM CDT	River Flood Warning	LSX	Osage	15 hr
Apr 18, 9:59 AM CDT	River Flood Warning	LSX	Marion	10 hr
Apr 18, 10:49 AM CDT	River Flood Warning	LSX	Cole	63 hr
Apr 18, 12:05 PM CDT	River Flood Warning	LSX	Marion	21 days
Apr 18, 12:05 PM CDT	River Flood Warning	LSX	Marion	9 hr
Apr 18, 5:05 PM CDT	River Flood Warning	LSX	Reynolds	16 hr

Nearby

Tornado Warnings in Missouri, 2026 Every tornado warning in 2026 Tornadoes in 2026

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.