Alert archive / Missouri / Tornado Warnings in 2018

Tornado Warning 15, NWS St. Louis, MO

November 25, 2018Saint Charles County, Saint Louis County, Missouri; Jersey County, Illinois

NWS St. Louis, MO issued this tornado warning at Nov 25, 2018, 4:46 PM CST for Saint Charles County, Saint Louis County, Missouri; Jersey County, Illinois. It was in force for 29 min. 1 report 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: Nov 25, 2018, 4:46 PM CST (22:46 UTC)
Expired: Nov 25, 2018, 5:15 PM CST
In force: 29 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

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

The radar

The St Louis radar (KLSX), 40 km from the middle of the area, began a volume at 22:45 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
Nov 25, 4:48 PM CST	FUNNEL CLOUD	2 Ne Maryland Heights, MO	FUNNEL CLOUD NOT TOUCHING THE GROUND, HEADING NORTHEAST.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 204 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: 1517 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 409 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

888 
WFUS53 KLSX 252246
TORLSX
ILC083-MOC183-189-252315-
/O.NEW.KLSX.TO.W.0015.181125T2246Z-181125T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
446 PM CST SUN NOV 25 2018

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  South central Jersey County in southwestern Illinois...
  Northeastern St. Charles County in east central Missouri...
  Northeastern St. Louis County in east central Missouri...

* Until 515 PM CST.
    
* At 445 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Maryland Heights, moving northeast at 40 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...
  Overland, St. Ann, St. John, Lambert-St. Louis International 
  Airport, Breckenridge Hills, Vinita Park, Charlack and Sycamore 
  Hills around 450 PM CST.
  Hazelwood, Bridgeton, Berkeley, Woodson Terrace, Bel-Ridge, 
  Kinloch, Lambert Field, Calverton Park and Edmundson around 455 PM 
  CST.
  Florissant, Ferguson, Dellwood and Orchard Farms around 500 PM 
  CST.
  Black Jack, Spanish Lake and Portage Des Sioux around 505 PM CST.
  Elsah and West Alton around 510 PM CST.

This also includes  Confluence State Park and First Missouri State
Capitol Historic Site.
 
This includes Interstate 70 in Missouri between exits 225 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 3877 9018 3877 9019 3860 9049
      3873 9064 3903 9035 3897 9027 3892 9028
      3891 9023 3889 9020 3886 9015 3883 9011
TIME...MOT...LOC 2245Z 223DEG 37KT 3874 9050 

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

$$

Britt

2 follow-up statements

583 
WWUS53 KLSX 252258
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
458 PM CST SUN NOV 25 2018

ILC083-MOC183-189-252315-
/O.CON.KLSX.TO.W.0015.000000T0000Z-181125T2315Z/
Jersey IL-St. Charles MO-St. Louis MO-
458 PM CST SUN NOV 25 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CST FOR SOUTH
CENTRAL JERSEY...NORTHEASTERN ST. CHARLES AND NORTH CENTRAL ST. LOUIS
COUNTIES...
    
At 457 PM CST, a severe thunderstorm capable of producing a tornado
was located near Hazelwood, moving northeast at 40 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...
  Elsah, West Alton and Portage Des Sioux around 510 PM CST.

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 3880 9026 3875 9042 3882 9055 3903 9035
      3897 9027 3892 9028 3891 9023 3889 9020
      3886 9015 3884 9019
TIME...MOT...LOC 2257Z 222DEG 34KT 3883 9039 

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

$$

Britt

643 
WWUS53 KLSX 252308
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
508 PM CST SUN NOV 25 2018

ILC083-MOC183-189-252317-
/O.EXP.KLSX.TO.W.0015.000000T0000Z-181125T2315Z/
Jersey IL-St. Charles MO-St. Louis MO-
508 PM CST SUN NOV 25 2018

...THE TORNADO WARNING FOR SOUTH CENTRAL JERSEY...NORTHEASTERN ST.
CHARLES AND NORTH CENTRAL ST. LOUIS COUNTIES WILL EXPIRE AT 515 PM
CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

LAT...LON 3880 9026 3875 9042 3882 9055 3903 9035
      3897 9027 3892 9028 3891 9023 3889 9020
      3886 9015 3884 9019
TIME...MOT...LOC 2307Z 223DEG 37KT 3890 9031 

$$

Britt

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 25, 1:48 AM CST	Dense Fog Advisory	LSX	Iron, Madison, Reynolds, Saint Francois	6 hr
Nov 25, 11:22 AM CST	Blizzard Warning	LSX	Audrain, Boone, Knox, Lewis, Marion, Moniteau and 4 more	16 hr
Nov 25, 11:22 AM CST	Wind Advisory	LSX	Crawford, Franklin, Gasconade, Iron, Jefferson, Lincoln and 10 more	19 hr
Nov 25, 11:22 AM CST	Winter Weather Advisory	LSX	Audrain, Boone, Callaway, Cole, Lincoln, Moniteau and 4 more	16 hr
Nov 25, 3:52 PM CST	Special Weather Statement	LSX	Franklin, Lincoln, Montgomery, Saint Charles, Warren	38 min
Nov 25, 4:30 PM CST	Special Weather Statement	LSX	Saint Charles, Saint Louis	30 min
Nov 25, 5:28 PM CST	Special Weather Statement	LSX	Macoupin, Madison	32 min

Nearby

Tornado Warnings in Missouri, 2018 Tornado Warnings in Illinois, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.