Alert archive / Missouri / Tornado Warnings in 2013

Tornado Warning 1, NWS St. Louis, MO

January 29, 2013Saint Charles County, Warren County, Missouri

NWS St. Louis, MO issued this tornado warning at Jan 29, 2013, 3:12 PM CST for Saint Charles County, Warren County, Missouri. It was in force for 33 min. 4 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: Jan 29, 2013, 3:12 PM CST (21:12 UTC)
Expired: Jan 29, 2013, 3:45 PM CST
In force: 33 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Saint Charles County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 25 km from the middle of the area, began a volume at 21:14 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
Jan 29, 3:15 PM CST	TORNADO	4 N Marthasville, MO	SIDING DAMAGE... 16 FOOT STRIPS BLOWN ONE QUARTER MILE DOWNWIND... OVERHANG BLEW OFF SHED... PICKED UP WATER TANKS AND MOVED THEM... TREE TOPS SHREDDED
Jan 29, 3:15 PM CST	TORNADO	4 Nw Marthasville, MO	SEVERAL LARGE TREES WERE SNAPPED SOUTH OF CONCORD HILL ROAD. OUTBUILDING WAS SEVERELY DAMAGED AND THE DEBRIS WAS THROWN UP INTO TREES. SOME MEDIUM TO ALRGE SIZE TREES WERE SNAPPED. THERE WAS DAMAGE TO OTHER BUILDINGS.
Jan 29, 3:29 PM CST	TSTM WND DMG	Flint Hill, MO	8 INCH TREE UPROOTED AND SEVERAL LIMBS DOWNED ALONG TOWNVIEW DRIVE
Jan 29, 3:31 PM CST	TSTM WND GST 50	Wentzville, MO	SPOTTER ALSO REPORTED EXTREMELY HEAVY RAIN...ABOUT 1 MILE NORTH OF I-70

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
Jan 29, 12:35 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.2 hours before the alert went out and 324 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: 285 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 728 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

697 
WFUS53 KLSX 292112
TORLSX
MOC183-219-292145-
/O.NEW.KLSX.TO.W.0001.130129T2112Z-130129T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
312 PM CST TUE JAN 29 2013

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  EAST CENTRAL WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 345 PM CST

* AT 311 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR MARTHASVILLE...AND MOVING NORTHEAST AT 50
  MPH.

  HAZARD...DEVELOPING TORNADO.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE
           HOMES COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR
           SNAPPED. VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.

* LOCATIONS IMPACTED INCLUDE...
  WENTZVILLE...NEW MELLE...FORISTELL AND FLINT HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3888 9087 3873 9077 3863 9111 3869 9116
TIME...MOT...LOC 2112Z 237DEG 45KT 3867 9109

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

$$

CVKING

1 follow-up statement

782 
WWUS53 KLSX 292132
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
332 PM CST TUE JAN 29 2013

MOC183-219-292143-
/O.CAN.KLSX.TO.W.0001.000000T0000Z-130129T2145Z/
ST. CHARLES MO-WARREN MO-
332 PM CST TUE JAN 29 2013

...THE TORNADO WARNING FOR EAST CENTRAL WARREN AND WEST CENTRAL ST.
CHARLES COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 8 PM.

LAT...LON 3888 9087 3873 9077 3863 9111 3869 9116
TIME...MOT...LOC 2133Z 237DEG 45KT 3881 9081

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 29, 10:38 AM CST	River Flood Warning	LSX	Saint Charles	52 hr
Jan 29, 12:57 PM CST	Severe Thunderstorm Warning	LSX	Boone, Callaway	48 min
Jan 29, 1:21 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery	39 min
Jan 29, 1:35 PM CST	Severe Thunderstorm Warning	LSX	Montgomery	25 min
Jan 29, 1:50 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	40 min
Jan 29, 2:27 PM CST	Severe Thunderstorm Warning	LSX	Gasconade, Osage	48 min
Jan 29, 2:52 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Warren	38 min
Jan 29, 3:30 PM CST	Tornado Warning	LSX	Lincoln, Saint Charles	30 min
Jan 29, 3:42 PM CST	Tornado Warning	LSX	Lincoln	33 min
Jan 29, 4:08 PM CST	Winter Weather Advisory	LSX	Knox, Lewis, Shelby	23 hr

Nearby

Tornado Warnings in Missouri, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.