Alert archive / Missouri / Tornado Warnings in 2010

Tornado Warning 89, NWS St. Louis, MO

December 31, 2010Jefferson County, Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this tornado warning at Dec 31, 2010, 12:29 PM CST for Jefferson County, Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 31 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: Dec 31, 2010, 12:29 PM CST (18:29 UTC)
Expired: Dec 31, 2010, 1:00 PM CST
In force: 31 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Jefferson County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 74 km from the middle of the area, began a volume at 18:30 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
Dec 31, 7:29 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.5 hours before the alert went out and 274 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: 506 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 450 m²/s²
0-3 km storm-relative helicity: 427 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

954 
WFUS53 KLSX 311829
TORLSX
MOC099-186-187-311900-
/O.NEW.KLSX.TO.W.0089.101231T1829Z-101231T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1229 PM CST FRI DEC 31 2010

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
  NORTHWESTERN STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 100 PM CST

* AT 1226 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR BONNE TERRE...AND MOVING NORTHEAST AT 50
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  CRYSTAL CITY...OLYMPIAN VILLAGE...BLOOMSDALE...VALLES MILL AND
  FRENCH VILLAGE.

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 3802 9063 3824 9037 3822 9036 3819 9034
      3816 9028 3809 9021 3808 9018 3804 9012
      3803 9012 3790 9054
TIME...MOT...LOC 1828Z 236DEG 44KT 3798 9053

$$

MILLER

1 follow-up statement

992 
WWUS53 KLSX 311845
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1245 PM CST FRI DEC 31 2010

MOC187-311855-
/O.CAN.KLSX.TO.W.0089.000000T0000Z-101231T1900Z/
ST. FRANCOIS MO-
1245 PM CST FRI DEC 31 2010

...THE TORNADO WARNING FOR ST. FRANCOIS COUNTY IS CANCELLED...

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

LAT...LON 3808 9043 3819 9034 3816 9028 3810 9022
      3807 9016 3802 9034
TIME...MOT...LOC 1845Z 236DEG 44KT 3809 9031

$$

MOC099-186-311900-
/O.CON.KLSX.TO.W.0089.000000T0000Z-101231T1900Z/
STE. GENEVIEVE MO-JEFFERSON MO-
1245 PM CST FRI DEC 31 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN JEFFERSON AND
NORTHWESTERN STE. GENEVIEVE COUNTIES UNTIL 100 PM CST...

AT 1243 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 8 MILES SOUTHEAST OF OLYMPIAN VILLAGE...OR 10 MILES
SOUTH OF CRYSTAL CITY...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EXTREME NORTHERN STE. GENEVIEVE AND EXTREME
  SOUTHEASTERN JEFFERSON COUNTIES.

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 3808 9043 3819 9034 3816 9028 3810 9022
      3807 9016 3802 9034
TIME...MOT...LOC 1845Z 236DEG 44KT 3809 9031

$$

MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 31, 2:26 AM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	49 min
Dec 31, 3:05 AM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	40 min
Dec 31, 9:41 AM CST	Severe Thunderstorm Warning	LSX	Callaway	34 min
Dec 31, 10:08 AM CST	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Pike	37 min
Dec 31, 10:11 AM CST	Tornado Warning	LSX	Crawford, Franklin, Gasconade	64 min
Dec 31, 10:13 AM CST	Tornado Warning	LSX	Crawford, Franklin, Washington	62 min
Dec 31, 10:22 AM CST	Tornado Warning	LSX	Pike	38 min
Dec 31, 10:47 AM CST	Tornado Warning	LSX	Montgomery, Pike	13 min
Dec 31, 10:56 AM CST	Tornado Warning	LSX	Crawford, Franklin, Jefferson, Saint Charles, Saint Louis, Warren and 1 more	64 min
Dec 31, 11:00 AM CST	Tornado Warning	LSX	Lincoln, Pike	60 min
Dec 31, 11:15 AM CST	Tornado Warning	LSX	Lincoln, Montgomery, Pike	45 min
Dec 31, 11:22 AM CST	Tornado Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Washington, City of Saint Louis	53 min
Dec 31, 11:59 AM CST	Tornado Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	61 min
Dec 31, 12:57 PM CST	Tornado Warning	LSX	Sainte Genevieve	48 min
Dec 31, 1:11 PM CST	Tornado Warning	LSX	Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois	49 min
Dec 31, 1:44 PM CST	Tornado Warning	LSX	Sainte Genevieve	61 min
Dec 31, 2:00 PM CST	Tornado Warning	LSX	Madison, Sainte Genevieve, Saint Francois	60 min

Nearby

Tornado Warnings in Missouri, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.