Alert archive / Missouri / Tornado Warnings in 2015

Tornado Warning 9, NWS St. Louis, MO

April 8, 2015Madison County, Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 8, 2015, 5:05 PM CDT for Madison County, Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 25 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: Apr 8, 2015, 5:05 PM CDT (22:05 UTC)
Expired: Apr 8, 2015, 5:30 PM CDT
In force: 25 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.5 in

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

The radar

The St Louis radar (KLSX), 124 km from the middle of the area, began a volume at 22:06 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
Apr 8, 1:05 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 8, 4:07 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.1 hours before the alert went out and 313 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: 195 J/kg
Mixed-layer CIN: -238 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

598 
WFUS53 KLSX 082205
TORLSX
MOC123-186-187-082230-
/O.NEW.KLSX.TO.W.0009.150408T2205Z-150408T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
505 PM CDT WED APR 8 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MADISON COUNTY IN SOUTHEAST MISSOURI...
  SOUTH CENTRAL STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 530 PM CDT

* AT 503 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR KNOB LICK...AND MOVING EAST AT 35 MPH.

  HAZARD...TORNADO AND TENNIS BALL SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
           TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
           LIKELY.

* THIS DANGEROUS STORM WILL BE NEAR...
  WOMAC AROUND 515 PM CDT.

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 3765 9052 3781 9039 3775 9005 3767 9010
      3764 9014 3755 9013 3752 9013 3751 9014
TIME...MOT...LOC 2205Z 283DEG 30KT 3769 9029

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

TRUETT

1 follow-up statement

531 
WWUS53 KLSX 082219
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
519 PM CDT WED APR 8 2015

MOC123-186-187-082230-
/O.CON.KLSX.TO.W.0009.000000T0000Z-150408T2230Z/
MADISON MO-STE. GENEVIEVE MO-ST. FRANCOIS MO-
519 PM CDT WED APR 8 2015

...A TORNADO WARNING REMAINS IN EFFECT FOR ST. FRANCOIS...SOUTH
CENTRAL STE. GENEVIEVE AND NORTHEASTERN MADISON COUNTIES UNTIL 530 PM
CDT...

AT 516 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED NEAR WOMAC...AND MOVING EAST AT 25 MPH.  IN ADDITION...
TENNIS BALL SIZED HAIL IS OCCURRING TO THE NORTHWEST OF THE POSSIBLE 
TORNADO...FROM NEAR KNOB LICK TO NORTHAST OF LIBERTYVILLE.   

HAZARD...TORNADO AND TENNIS BALL SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
         LIKELY.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF NORTHEASTERN
MADISON...SOUTH CENTRAL STE. GENEVIEVE AND ST. FRANCOIS 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 3765 9052 3781 9039 3775 9005 3767 9010
      3764 9014 3755 9013 3752 9013 3751 9014
TIME...MOT...LOC 2218Z 291DEG 23KT 3766 9019

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 9:23 AM CDT	River Flood Warning	LSX	Jefferson	4 days
Apr 8, 11:33 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	42 min
Apr 8, 12:36 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Osage	39 min
Apr 8, 12:46 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	44 min
Apr 8, 1:07 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	38 min
Apr 8, 1:11 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	34 min
Apr 8, 1:33 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	27 min
Apr 8, 1:43 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Warren, Washington	47 min
Apr 8, 2:23 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	52 min
Apr 8, 2:26 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	49 min
Apr 8, 3:05 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Iron, Jefferson, Washington	55 min
Apr 8, 3:07 PM CDT	Tornado Warning	LSX	Crawford, Washington	23 min
Apr 8, 3:20 PM CDT	Tornado Warning	LSX	Jefferson, Saint Francois, Washington	25 min
Apr 8, 3:24 PM CDT	Flash Flood Watch	LSX	Boone, Callaway, Cole, Crawford, Franklin, Gasconade and 11 more	31 hr
Apr 8, 3:40 PM CDT	Tornado Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	35 min
Apr 8, 3:59 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	31 min
Apr 8, 4:20 PM CDT	Areal Flood Advisory	LSX	Washington	4 hr
Apr 8, 4:26 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	34 min
Apr 8, 4:53 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	37 min
Apr 8, 4:57 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois, Washington	4 hr
Apr 8, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois, Washington	22 min
Apr 8, 5:28 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Sainte Genevieve, Saint Francois	47 min
Apr 8, 5:50 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois	3 hr
Apr 8, 6:14 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Sainte Genevieve, Saint Francois	46 min
Apr 8, 6:27 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Moniteau, Monroe	33 min
Apr 8, 6:56 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Monroe, Shelby	49 min

Nearby

Tornado Warnings in Missouri, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.