Alert archive / Missouri / Tornado Warnings in 2018

Tornado Warning 6, NWS St. Louis, MO

June 26, 2018Franklin County, Missouri

NWS St. Louis, MO issued this tornado warning at Jun 26, 2018, 4:19 PM CDT for Franklin County, Missouri. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 26, 2018, 4:19 PM CDT (21:19 UTC)
Expired: Jun 26, 2018, 4:45 PM CDT
In force: 26 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Franklin County, MO

The radar

The St Louis radar (KLSX), 60 km from the middle of the area, began a volume at 21:20 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 26, 2:22 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.3 hours before the alert went out and 279 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: 710 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 289 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

As transmitted.

564 
WFUS53 KLSX 262119
TORLSX
MOC071-262145-
/O.NEW.KLSX.TO.W.0006.180626T2119Z-180626T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
419 PM CDT TUE JUN 26 2018

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  West central Franklin County in east central Missouri...

* Until 445 PM CDT.
    
* At 419 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Gerald, moving east at 50 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.

* This dangerous storm will be near...
  Beaufort around 425 PM CDT.

Other locations impacted by this tornadic thunderstorm include Noser
Mill and Leslie.

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 3833 9136 3846 9136 3844 9107 3833 9105
TIME...MOT...LOC 2119Z 262DEG 43KT 3844 9129 

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

$$

Glass

1 follow-up statement

859 
WWUS53 KLSX 262126
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
426 PM CDT TUE JUN 26 2018

MOC071-262145-
/O.CON.KLSX.TO.W.0006.000000T0000Z-180626T2145Z/
Franklin MO-
426 PM CDT TUE JUN 26 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR WEST
CENTRAL FRANKLIN COUNTY...
    
At 426 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Beaufort, moving east 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.

This tornadic thunderstorm will remain over mainly rural areas of
west central Franklin County, including the following locations...
Noser Mill and Leslie.

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 3833 9130 3846 9130 3844 9107 3833 9105
TIME...MOT...LOC 2126Z 272DEG 40KT 3842 9119 

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

$$

Glass

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:04 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	41 min
Jun 25, 7:12 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis	48 min
Jun 25, 7:43 PM CDT	Special Weather Statement	LSX	City of Saint Louis	47 min
Jun 25, 7:48 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis	42 min
Jun 26, 5:34 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	26 min
Jun 26, 8:46 AM CDT	Areal Flood Advisory	LSX	Saint Francois	4 hr
Jun 26, 9:58 AM CDT	Special Weather Statement	LSX	Cole	47 min
Jun 26, 2:03 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds, Washington	42 min
Jun 26, 2:19 PM CDT	Flash Flood Warning	LSX	Boone, Callaway	6 hr
Jun 26, 2:33 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Cole, Moniteau	42 min
Jun 26, 2:51 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois, Washington	39 min
Jun 26, 3:01 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	44 min
Jun 26, 3:05 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	40 min
Jun 26, 3:22 PM CDT	Flash Flood Warning	LSX	Lincoln, Montgomery, Warren	5 hr
Jun 26, 3:25 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Sainte Genevieve, Saint Francois	20 min
Jun 26, 3:39 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Franklin, Gasconade, Montgomery, Osage and 1 more	51 min
Jun 26, 3:44 PM CDT	Severe Thunderstorm Warning	LSX	Madison	46 min
Jun 26, 4:09 PM CDT	Tornado Warning	LSX	Franklin, Gasconade	36 min
Jun 26, 4:35 PM CDT	Tornado Warning	LSX	Franklin	40 min
Jun 26, 4:58 PM CDT	Special Weather Statement	LSX	Crawford, Washington	62 min
Jun 26, 5:02 PM CDT	Tornado Warning	LSX	Franklin	4 min
Jun 26, 5:10 PM CDT	Special Weather Statement	LSX	Jefferson	50 min
Jun 26, 5:43 PM CDT	Special Weather Statement	LSX	Reynolds	17 min

Nearby

Tornado Warnings in Missouri, 2018 Every tornado warning in 2018 Tornadoes in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.