Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 16, NWS St. Louis, MO

January 17, 20124 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jan 17, 2012, 6:25 AM CST for 4 counties in Missouri. It was in force for 50 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: Jan 17, 2012, 6:25 AM CST (12:25 UTC)
Expired: Jan 17, 2012, 7:15 AM CST
In force: 50 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Iron County, MO, Madison County, MO, Reynolds County, MO, Saint Francois County, MO

The radar

The St Louis radar (KLSX), 153 km from the middle of the area, began a volume at 12:27 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
Jan 16, 11:47 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 0.4 hours before the alert went out and 281 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: 504 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 45 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.

312 
WUUS53 KLSX 171225
SVRLSX
MOC093-123-179-187-171315-
/O.NEW.KLSX.SV.W.0016.120117T1225Z-120117T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
625 AM CST TUE JAN 17 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  IRON COUNTY IN SOUTHEAST MISSOURI...
  MADISON COUNTY IN SOUTHEAST MISSOURI...
  SOUTHEASTERN REYNOLDS COUNTY IN SOUTHEAST MISSOURI...
  SOUTHERN ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 715 AM CST

* AT 624 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM PILOT KNOB TO 6 MILES EAST OF
  EMINENCE...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  IRONTON...FREDERICKTOWN...ARCADIA...GLOVER...ROSELLE...ELLINGTON...
  KNOB LICK...ANNAPOLIS...GARWOOD...JUNCTION CITY...SACO...
  BUCKHORN...MARQUAND...LESTERVILLE...HOGAN...REDFORD...CHLORIDE...
  SABULA...MINE LA MOTTE AND CATHERINE PLACE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3705 9096 3709 9097 3709 9101 3716 9104
      3720 9113 3725 9113 3726 9117 3770 9065
      3770 9023 3767 9020 3770 9015 3767 9011
      3764 9014 3731 9015 3731 9054 3727 9055
      3727 9073 3717 9073 3713 9077 3705 9078
TIME...MOT...LOC 1225Z 267DEG 36KT 3764 9062 3716 9124
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

3 follow-up statements

285 
WWUS53 KLSX 171249
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
649 AM CST TUE JAN 17 2012

MOC093-123-179-187-171315-
/O.CON.KLSX.SV.W.0016.000000T0000Z-120117T1315Z/
IRON MO-MADISON MO-REYNOLDS MO-ST. FRANCOIS MO-
649 AM CST TUE JAN 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ST.
FRANCOIS...SOUTHEASTERN REYNOLDS...MADISON AND IRON COUNTIES UNTIL
715 AM CST...

AT 645 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM JUNCTION CITY TO 6 MILES
NORTHWEST OF GARWOOD...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  FREDERICKTOWN...GARWOOD...JUNCTION CITY...SACO...MARQUAND...
  BUCKHORN...MINE LA MOTTE...CATHERINE PLACE...VULCAN AND DES ARC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3709 9097 3710 9101 3716 9103 3770 9028
      3767 9020 3770 9015 3767 9011 3764 9014
      3731 9015 3731 9054 3727 9055 3727 9073
      3717 9073 3713 9077 3705 9078 3705 9096
TIME...MOT...LOC 1249Z 274DEG 38KT 3762 9030 3714 9092
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

403 
WWUS53 KLSX 171311
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
711 AM CST TUE JAN 17 2012

MOC093-179-187-171320-
/O.CAN.KLSX.SV.W.0016.000000T0000Z-120117T1315Z/
IRON MO-REYNOLDS MO-ST. FRANCOIS MO-
711 AM CST TUE JAN 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ST. 
FRANCOIS...SOUTHEASTERN REYNOLDS AND SOUTHERN IRON COUNTIES IS 
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED 
OUT OF THE WARNED AREA.

LAT...LON 3731 9015 3731 9047 3758 9014
TIME...MOT...LOC 1310Z 277DEG 41KT 3752 9009 3730 9036

$$

MOC123-171315-
/O.CON.KLSX.SV.W.0016.000000T0000Z-120117T1315Z/
MADISON MO-
711 AM CST TUE JAN 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
MADISON COUNTY UNTIL 715 AM CST...

AT 707 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
LINE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES 
NORTH OF MARQUAND TO SACO...MOVING EAST AT 45 MPH.

THE LINE OF STORMS HAS WEAKENED...BUT BRIEF WIND GUSTS TO NEAR 60 
MPH AND SMALL HAIL IS STILL POSSIBLE.     

LOCATIONS IMPACTED INCLUDE...
  BUCKHORN AND MARQUAND.

LAT...LON 3731 9015 3731 9047 3758 9014
TIME...MOT...LOC 1310Z 277DEG 41KT 3752 9009 3730 9036
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

206 
WWUS53 KLSX 171318
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
718 AM CST TUE JAN 17 2012

MOC123-171327-
/O.EXP.KLSX.SV.W.0016.000000T0000Z-120117T1315Z/
MADISON MO-
718 AM CST TUE JAN 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MADISON COUNTY
HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED AS IT 
MOVES INTO EXTREME SOUTHEAST MADISON COUNTY.   

WIND GUSTS OF 30 TO 40 MPH...AND BRIEF HEAVY RAINS...WILL STILL BE 
POSSIBLE EAST OF THE BUCKHORN AREA UNTIL 730 AM.

LAT...LON 3731 9015 3731 9047 3758 9014
TIME...MOT...LOC 1311Z 277DEG 41KT 3752 9007 3730 9035

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 16, 11:59 PM CST	Severe Thunderstorm Warning	LSX	Callaway, Cole, Gasconade, Montgomery, Osage	58 days
Jan 17, 12:39 AM CST	Tornado Warning	LSX	Gasconade, Osage	36 min
Jan 17, 12:55 AM CST	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	35 min
Jan 17, 1:14 AM CST	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	31 min
Jan 17, 1:23 AM CST	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	37 min
Jan 17, 1:39 AM CST	Tornado Warning	LSX	Franklin, Jefferson	36 min
Jan 17, 1:41 AM CST	Tornado Warning	LSX	Crawford, Franklin	34 min
Jan 17, 2:08 AM CST	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	37 min
Jan 17, 2:12 AM CST	Tornado Warning	LSX	Franklin, Jefferson, Washington	33 min
Jan 17, 2:35 AM CST	Tornado Warning	LSX	Jefferson, Saint Louis	40 min
Jan 17, 4:18 AM CST	Severe Thunderstorm Warning	LSX	Crawford	27 min
Jan 17, 4:34 AM CST	Areal Flood Advisory	LSX	Cole, Crawford, Franklin, Gasconade, Jefferson, Saint Charles and 3 more	60 days
Jan 17, 5:22 AM CST	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve	38 min
Jan 17, 6:01 AM CST	Severe Thunderstorm Warning	LSX	Iron, Sainte Genevieve, Saint Francois, Washington	44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every severe thunderstorm warning in 2012

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.