Alert archive / Missouri / Tornado Warnings in 2015

Tornado Warning 44, NWS St. Louis, MO

July 20, 2015Iron County, Madison County, Missouri

NWS St. Louis, MO issued this tornado warning at Jul 20, 2015, 6:00 PM CDT for Iron County, Madison County, Missouri. It was in force for 14 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: Jul 20, 2015, 6:00 PM CDT (23:00 UTC)
Expired: Jul 20, 2015, 6:14 PM CDT
In force: 14 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Iron County, MO, Madison County, MO

The radar

The St Louis radar (KLSX), 132 km from the middle of the area, began a volume at 23:01 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 nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.0 hours before the alert went out and 287 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: 868 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

287 
WFUS53 KLSX 202300
TORLSX
MOC093-123-202330-
/O.NEW.KLSX.TO.W.0044.150720T2300Z-150720T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
600 PM CDT MON JUL 20 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN MADISON COUNTY IN SOUTHEASTERN MISSOURI...
  EAST CENTRAL IRON COUNTY IN SOUTHEASTERN MISSOURI...

* UNTIL 630 PM CDT
    
* AT 559 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR GLOVER...MOVING SOUTHEAST AT 25 MPH.

  HAZARD...TORNADO. 

  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. 

* LOCATIONS IMPACTED INCLUDE...
  IRONTON...PILOT KNOB...ARCADIA...GLOVER...CHLORIDE AND HOGAN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3749 9077 3755 9077 3763 9069 3755 9037
      3735 9056
TIME...MOT...LOC 2259Z 299DEG 22KT 3755 9069 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

KANOFSKY

1 follow-up statement

517 
WWUS53 KLSX 202314
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
614 PM CDT MON JUL 20 2015

MOC093-123-202324-
/O.CAN.KLSX.TO.W.0044.000000T0000Z-150720T2330Z/
MADISON MO-IRON MO-
614 PM CDT MON JUL 20 2015

...THE TORNADO WARNING FOR NORTHWESTERN MADISON AND EAST CENTRAL IRON
COUNTIES IN SOUTHEASTERN MISSOURI IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER HEAVY RAIN IS
STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3749 9077 3755 9077 3763 9069 3755 9037
      3735 9056
TIME...MOT...LOC 2311Z 299DEG 22KT 3750 9059 

$$

KANOFSKY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:49 PM CDT	River Flood Warning	LSX	Lewis	3 days
Jul 19, 9:21 PM CDT	River Flood Warning	LSX	Lewis	48 hr
Jul 20, 3:36 AM CDT	Flash Flood Warning	LSX	Reynolds	6 hr
Jul 20, 7:28 AM CDT	Flash Flood Warning	LSX	Moniteau	6 hr
Jul 20, 9:43 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	47 min
Jul 20, 5:02 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	43 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.