Alert archive / Missouri / Tornado Warnings in 2010

Tornado Warning 92, NWS St. Louis, MO

December 31, 20105 counties in Missouri; Randolph County, Illinois

NWS St. Louis, MO issued this tornado warning at Dec 31, 2010, 1:11 PM CST for 5 counties in Missouri; Randolph County, Illinois. It was in force for 49 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, 1:11 PM CST (19:11 UTC)
Expired: Dec 31, 2010, 2:00 PM CST
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Randolph County, IL, Iron County, MO, Madison County, MO, Reynolds County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 150 km from the middle of the area, began a volume at 19:11 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

Little Rock, AR (KLZK), launched 12:00Z, 7.2 hours before the alert went out and 286 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: 874 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 360 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

271 
WFUS53 KLSX 311911
TORLSX
ILC157-MOC093-123-179-186-187-312000-
/O.NEW.KLSX.TO.W.0092.101231T1911Z-101231T2000Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
  IRON COUNTY IN SOUTHEAST MISSOURI...
  MADISON COUNTY IN SOUTHEAST MISSOURI...
  SOUTHEASTERN REYNOLDS COUNTY IN SOUTHEAST MISSOURI...
  STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 200 PM CST

* AT 107 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE SQUALL LINE CAPABLE OF PRODUCING BRIEF RAIN-WRAPPED
  TORNADOES IN ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE.
  THESE DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6
  MILES NORTHWEST OF ROCKY RIDGE TO GARWOOD...AND MOVING NORTHEAST AT
  50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FARMINGTON...FREDERICKTOWN...ROSELLE...ANNAPOLIS...ROCKY RIDGE...
  KNOB LICK...WEINGARTEN...COFFMAN...SACO...JUNCTION CITY...WOMAC...
  BUCKHORN...ST. MARY...MARQUAND...SABULA...VULCAN...DES ARC...
  LIBERTYVILLE...CATHERINE PLACE AND RIVER AUX VASES.

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 3705 9098 3709 9098 3716 9104 3805 9041
      3792 8985 3783 9000 3765 9014 3731 9016
      3731 9055 3727 9056 3727 9073 3717 9074
      3714 9078 3706 9078
TIME...MOT...LOC 1911Z 236DEG 43KT 3800 9030 3711 9092

$$

MILLER

1 follow-up statement

747 
WWUS53 KLSX 311946
SVSLSX

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

MOC179-311956-
/O.CAN.KLSX.TO.W.0092.000000T0000Z-101231T2000Z/
REYNOLDS MO-
146 PM CST FRI DEC 31 2010

...THE TORNADO WARNING FOR SOUTHEASTERN REYNOLDS COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF
THE WARNED AREA.

LAT...LON 3727 9074 3764 9059 3800 9026 3792 8985
      3783 9000 3765 9014 3731 9016 3731 9055
      3727 9056
TIME...MOT...LOC 1946Z 236DEG 43KT 3823 8986 3734 9048

$$

ILC157-MOC093-123-186-187-312000-
/O.CON.KLSX.TO.W.0092.000000T0000Z-101231T2000Z/
RANDOLPH IL-MADISON MO-IRON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-
146 PM CST FRI DEC 31 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR STE. GENEVIEVE...ST.
FRANCOIS...IRON...MADISON AND SOUTH CENTRAL RANDOLPH COUNTIES UNTIL
200 PM CST...

AT 143 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES.  THESE DANGEROUS STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM BALDWIN TO SACO...MOVING
NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  FREDERICKTOWN...SACO...JUNCTION CITY...WOMAC...BUCKHORN...ST.
  MARY...MARQUAND...MINE LA MOTTE...MINNITH AND KASKASKIA.

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 3727 9074 3764 9059 3800 9026 3792 8985
      3783 9000 3765 9014 3731 9016 3731 9055
      3727 9056
TIME...MOT...LOC 1946Z 236DEG 43KT 3823 8986 3734 9048

$$

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, 12:29 PM CST	Tornado Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	31 min
Dec 31, 12:57 PM CST	Tornado Warning	LSX	Sainte Genevieve	48 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
Dec 31, 9:43 AM CST	Tornado Warning	LSX	Adams, Brown	32 min
Dec 31, 11:54 AM CST	Tornado Warning	LSX	Calhoun, Greene, Pike	51 min
Dec 31, 12:38 PM CST	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion, Montgomery	67 min
Dec 31, 1:40 PM CST	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion, Washington	50 min
Dec 31, 2:22 PM CST	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion, Washington	53 min

Nearby

Tornado Warnings in Missouri, 2010 Tornado Warnings in Illinois, 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.