Alert archive / Missouri / Tornado Warnings in 2018

Tornado Warning 16, NWS St. Louis, MO

December 1, 2018Madison County, Missouri

NWS St. Louis, MO issued this tornado warning at Dec 1, 2018, 3:32 AM CST for Madison County, Missouri. It was in force for 15 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: Dec 1, 2018, 3:32 AM CST (09:32 UTC)
Expired: Dec 1, 2018, 3:47 AM CST
In force: 15 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Madison County, MO

The radar

The Paducah radar (KPAH), 135 km from the middle of the area, began a volume at 09:34 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
Dec 1, 3:40 AM CST	TSTM WND DMG	6 N Marquand, MO	TREES DOWN.

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

The nearest sounding before it

Little Rock, AR (KBYH), launched 00:00Z, 9.5 hours before the alert went out and 288 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: 389 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

126 
WFUS53 KLSX 010932
TORLSX
MOC123-011000-
/O.NEW.KLSX.TO.W.0016.181201T0932Z-181201T1000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
332 AM CST SAT DEC 1 2018

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Madison County in southeastern Missouri...

* Until 400 AM CST.
    
* At 332 AM CST, a severe thunderstorm capable of producing a tornado
  was located near Marquand, moving northeast at 60 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
  southeastern Madison County in southeastern Missouri.

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 3732 9030 3754 9036 3758 9015 3741 9014
      3731 9015
TIME...MOT...LOC 0932Z 242DEG 50KT 3740 9022 

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

$$

Glass

1 follow-up statement

330 
WWUS53 KLSX 010947
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
347 AM CST SAT DEC 1 2018

MOC123-010957-
/O.CAN.KLSX.TO.W.0016.000000T0000Z-181201T1000Z/
Madison MO-
347 AM CST SAT DEC 1 2018

...THE TORNADO WARNING FOR SOUTHEASTERN MADISON COUNTY IN
SOUTHEASTERN MISSOURI IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
St Louis.

LAT...LON 3732 9030 3754 9036 3758 9015 3741 9014
      3731 9015
TIME...MOT...LOC 0945Z 242DEG 50KT 3750 8999 

$$

Glass

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 1, 2:37 AM CST	Severe Thunderstorm Warning	LSX	Iron, Reynolds	38 min
Dec 1, 2:54 AM CST	Special Weather Statement	LSX	Crawford, Gasconade, Osage, Washington	51 min
Dec 1, 3:11 AM CST	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois, Washington	49 min
Dec 1, 3:54 AM CST	Severe Thunderstorm Warning	LSX	Sainte Genevieve	29 min
Dec 1, 9:24 AM CST	River Flood Warning	LSX	Marion	13 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.