Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 15, NWS St. Louis, MO

January 17, 20124 counties in Missouri; Randolph County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jan 17, 2012, 6:01 AM CST for 4 counties in Missouri; Randolph County, Illinois. It was in force for 44 min. 1 report 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 17, 2012, 6:01 AM CST (12:01 UTC)
Expired: Jan 17, 2012, 6:45 AM CST
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Randolph County, IL, Iron County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 109 km from the middle of the area, began a volume at 12:04 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 17, 6:22 AM CST	TSTM WND GST 61	1 S Farmington, 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
Jan 16, 11:47 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 0.0 hours before the alert went out and 304 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: 557 m above ground
0-6 km bulk shear: 87 kt
0-1 km storm-relative helicity: -88 m²/s²
0-3 km storm-relative helicity: -55 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.

893 
WUUS53 KLSX 171201
SVRLSX
ILC157-MOC093-186-187-221-171245-
/O.NEW.KLSX.SV.W.0015.120117T1201Z-120117T1245Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
  IRON COUNTY IN SOUTHEAST MISSOURI...
  STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
  SOUTHEASTERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 645 AM CST

* AT 557 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 BONNE TERRE TO 7 MILES WEST OF
  BELLEVIEW...AND MOVING EAST AT 45 MPH.

  AT 555 AM...A CARPORT WAS DAMAGED BY HIGH WINDS IN THE BELGRADE
  AREA.

* LOCATIONS IMPACTED INCLUDE...
  DESLOGE...BISMARCK...FARMINGTON...STE. GENEVIEVE...BELLEVIEW...PARK
  HILLS...PILOT KNOB...IRON MOUNTAIN...ROCKY RIDGE...WEINGARTEN...
  KNOB LICK...COFFMAN...WOMAC...ST. MARY...FRENCH VILLAGE...
  GRANITE...LEADINGTON...DOE RUN...LIBERTYVILLE AND RIVER AUX VASES.

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 3760 9103 3799 9050 3802 8972 3787 8990
      3787 8994 3782 8999 3771 9007 3764 9015
      3764 9053 3763 9054
TIME...MOT...LOC 1201Z 260DEG 41KT 3794 9046 3768 9082
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

2 follow-up statements

353 
WWUS53 KLSX 171223
SVSLSX

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

MOC093-221-171231-
/O.CAN.KLSX.SV.W.0015.000000T0000Z-120117T1245Z/
IRON MO-WASHINGTON MO-
623 AM CST TUE JAN 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON AND 
NORTHERN IRON COUNTIES IS CANCELLED...

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

LAT...LON 3765 9065 3799 9019 3802 8972 3787 8990
      3787 8994 3782 8999 3770 9008 3764 9015
TIME...MOT...LOC 1221Z 260DEG 41KT 3800 9013 3764 9060

$$

ILC157-MOC186-187-171245-
/O.CON.KLSX.SV.W.0015.000000T0000Z-120117T1245Z/
RANDOLPH IL-STE. GENEVIEVE MO-ST. FRANCOIS MO-
623 AM CST TUE JAN 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ST.
FRANCOIS...STE. GENEVIEVE AND SOUTH CENTRAL RANDOLPH COUNTIES UNTIL
645 AM CST...

AT 617 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 BLOOMSDALE TO PILOT KNOB...MOVING
EAST AT 45 MPH.

AT 622 AM...WINDS OF 61 MPH WERE REPORTED AT FARMINGTON REGIONAL 
AIRPORT.

LOCATIONS IMPACTED INCLUDE...
  STE. GENEVIEVE...WEINGARTEN...KNOB LICK...COFFMAN...ST. MARY...
  WOMAC...RIVER AUX VASES...LIBERTYVILLE...NEW PALESTINE...KASKASKIA
  AND MINNITH.

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 3765 9065 3799 9019 3802 8972 3787 8990
      3787 8994 3782 8999 3770 9008 3764 9015
TIME...MOT...LOC 1221Z 260DEG 41KT 3800 9013 3764 9060
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

595 
WWUS53 KLSX 171247
SVSLSX

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

ILC157-MOC186-187-171257-
/O.EXP.KLSX.SV.W.0015.000000T0000Z-120117T1245Z/
RANDOLPH IL-STE. GENEVIEVE MO-ST. FRANCOIS MO-
647 AM CST TUE JAN 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR ST. FRANCOIS...STE. GENEVIEVE
AND SOUTH CENTRAL RANDOLPH COUNTIES HAS EXPIRED...

AT 645 AM...THE LINE OF STORMS WHICH PROMPTED THE WARNING WAS NEAR 
THE STE GENEVIEVE....PERRY COUNTY LINE...AND WAS WEAKENING AS IT 
MOVED OUT OF THE WARNED AREA.

LAT...LON 3765 9065 3799 9019 3802 8972 3787 8990
      3787 8994 3782 8999 3770 9008 3764 9015
TIME...MOT...LOC 1223Z 260DEG 41KT 3800 9010 3764 9057

$$

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, 6:25 AM CST	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds, Saint Francois	50 min
Jan 17, 2:17 AM CST	Severe Thunderstorm Warning	LSX	Madison	28 min
Jan 17, 2:38 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Madison, Saint Clair	52 min
Jan 17, 2:39 AM CST	Severe Thunderstorm Warning	LSX	Bond	36 min
Jan 17, 3:07 AM CST	Tornado Warning	LSX	Clinton, Monroe, Saint Clair, Washington	38 min
Jan 17, 3:23 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Marion	35 min
Jan 17, 3:46 AM CST	Tornado Warning	LSX	Clinton, Washington	29 min
Jan 17, 5:14 AM CST	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison, Saint Clair	46 min
Jan 17, 5:47 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Fayette, Marion	43 min
Jan 17, 5:53 AM CST	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair, Washington	52 min
Jan 17, 6:35 AM CST	Severe Thunderstorm Warning	LSX	Randolph	25 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Severe Thunderstorm Warnings in Illinois, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.