Alert archive / Missouri / Tornado Warnings in 2015

Tornado Warning 45, NWS St. Louis, MO

December 23, 2015Madison County, Missouri

NWS St. Louis, MO issued this tornado warning at Dec 23, 2015, 10:20 AM CST for Madison County, Missouri. It was in force for 25 min. 2 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: Dec 23, 2015, 10:20 AM CST (16:20 UTC)
Expired: Dec 23, 2015, 10:45 AM CST
In force: 25 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), 139 km from the middle of the area, began a volume at 16:24 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 23, 10:34 AM CST	TSTM WND GST 40	Marquand, MO
Dec 23, 10:34 AM CST	HAIL 0.7	Marquand, MO

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
Dec 23, 9:13 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 4.3 hours before the alert went out and 285 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: 343 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 568 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 331 m²/s²
0-3 km storm-relative helicity: 353 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

355 
WFUS53 KLSX 231620
TORLSX
MOC123-231645-
/O.NEW.KLSX.TO.W.0045.151223T1620Z-151223T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1020 AM CST WED DEC 23 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MADISON COUNTY IN SOUTHEASTERN MISSOURI...

* UNTIL 1045 AM CST
    
* AT 1020 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR BUCKHORN...MOVING NORTHEAST AT 65 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...
  MARQUAND AROUND 1035 AM 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 3732 9045 3755 9014 3731 9015
TIME...MOT...LOC 1620Z 234DEG 55KT 3730 9035 

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

$$

BRITT

1 follow-up statement

876 
WWUS53 KLSX 231642
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1042 AM CST WED DEC 23 2015

MOC123-231651-
/O.EXP.KLSX.TO.W.0045.000000T0000Z-151223T1645Z/
MADISON MO-
1042 AM CST WED DEC 23 2015

...THE TORNADO WARNING FOR SOUTHEASTERN MADISON COUNTY IN
SOUTHEASTERN MISSOURI WILL EXPIRE AT 1045 AM CST...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CST FOR SOUTHEASTERN
MISSOURI.

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 9045 3755 9014 3731 9015
TIME...MOT...LOC 1638Z 234DEG 55KT 3730 9035 

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 23, 5:55 AM CST	Special Weather Statement	LSX	Sainte Genevieve, Saint Francois	50 min
Dec 23, 9:36 AM CST	Severe Thunderstorm Warning	LSX	Reynolds	39 min
Dec 23, 9:58 AM CST	Severe Thunderstorm Warning	LSX	Iron, Madison, Saint Francois	47 min
Dec 23, 10:37 AM CST	Severe Thunderstorm Warning	LSX	Sainte Genevieve	38 min
Dec 23, 1:29 PM CST	Wind Advisory	LSX	Audrain, Boone, Callaway, Cole, Gasconade, Marion and 6 more	9 hr
Dec 23, 2:46 PM CST	Severe Thunderstorm Warning	LSX	Marion, Monroe, Ralls	44 min
Dec 23, 3:09 PM CST	Severe Thunderstorm Warning	LSX	Marion	51 min
Dec 23, 3:13 PM CST	Severe Thunderstorm Warning	LSX	Marion	16 min
Dec 23, 3:40 PM CST	Severe Thunderstorm Warning	LSX	Lincoln, Pike	50 min
Dec 23, 3:45 PM CST	Severe Thunderstorm Warning	LSX	Pike	45 min

Nearby

Tornado Warnings in Missouri, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.