Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 13, NWS St. Louis, MO

April 13, 2018Gasconade County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 13, 2018, 8:05 PM CDT for Gasconade County, Osage County, Missouri. It was in force for 40 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 13, 2018, 8:05 PM CDT (01:05 UTC)
Expired: Apr 13, 2018, 8:45 PM CDT
In force: 40 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Gasconade County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 01:09 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 13, 5:27 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.1 hours before the alert went out and 250 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: 505 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

As transmitted.

782 
WUUS53 KLSX 140105
SVRLSX
MOC073-151-140145-
/O.NEW.KLSX.SV.W.0013.180414T0105Z-180414T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
805 PM CDT FRI APR 13 2018

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Osage County in central Missouri...
  Southern Gasconade County in east central Missouri...

* Until 845 PM CDT.

* At 804 PM CDT, a severe thunderstorm was located near Vienna,
  moving northeast at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Owensville, Belle, Bland, Freeburg, Rich Fountain, Mount Sterling,
  Argyle and Canaan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A tornado watch remains in effect until 100 AM CDT for central and
east central Missouri.

LAT...LON 3858 9164 3832 9137 3823 9164 3829 9165
      3829 9208
TIME...MOT...LOC 0104Z 240DEG 38KT 3822 9201 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Glass

3 follow-up statements

082 
WWUS53 KLSX 140119
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
819 PM CDT FRI APR 13 2018

MOC073-151-140145-
/O.CON.KLSX.SV.W.0013.000000T0000Z-180414T0145Z/
Osage MO-Gasconade MO-
819 PM CDT FRI APR 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN OSAGE AND SOUTHERN GASCONADE COUNTIES...

At 819 PM CDT, a severe thunderstorm was located near Freeburg,
moving northeast at 45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Owensville, Belle, Bland, Freeburg, Rich Fountain, Mount Sterling,
Argyle and Canaan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A tornado watch remains in effect until 100 AM CDT for central and
east central Missouri.

LAT...LON 3858 9164 3832 9137 3823 9164 3829 9165
      3829 9208
TIME...MOT...LOC 0119Z 240DEG 38KT 3830 9183 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Glass

282 
WWUS53 KLSX 140133
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
833 PM CDT FRI APR 13 2018

MOC073-151-140145-
/O.CON.KLSX.SV.W.0013.000000T0000Z-180414T0145Z/
Osage MO-Gasconade MO-
833 PM CDT FRI APR 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN OSAGE AND WEST CENTRAL GASCONADE COUNTIES...

At 833 PM CDT, a severe thunderstorm was located near Belle, moving
northeast at 35 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Owensville, Belle, Bland, Rich Fountain, Mount Sterling and Canaan. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A tornado watch remains in effect until 100 AM CDT for central and
east central Missouri.

LAT...LON 3840 9145 3829 9153 3829 9190 3841 9190
      3858 9164
TIME...MOT...LOC 0133Z 233DEG 31KT 3837 9174 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Glass

174 
WWUS53 KLSX 140145
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
845 PM CDT FRI APR 13 2018

MOC073-151-140155-
/O.EXP.KLSX.SV.W.0013.000000T0000Z-180414T0145Z/
Osage MO-Gasconade MO-
845 PM CDT FRI APR 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OSAGE AND WEST
CENTRAL GASCONADE COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A tornado watch remains in effect until 100 AM CDT for central and
east central Missouri.

LAT...LON 3840 9145 3829 9153 3829 9190 3841 9190
      3858 9164
TIME...MOT...LOC 0145Z 240DEG 38KT 3843 9160 

$$

Glass

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:31 PM CDT	Special Weather Statement	LSX	Lincoln, Montgomery	44 min
Apr 13, 8:44 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	46 min
Apr 13, 8:51 PM CDT	Tornado Warning	LSX	Crawford	24 min
Apr 13, 9:13 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Washington	47 min
Apr 13, 9:24 PM CDT	Special Weather Statement	LSX	Lincoln	51 min
Apr 13, 9:53 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Sainte Genevieve, Saint Francois, Saint Louis and 3 more	67 min
Apr 13, 10:32 PM CDT	Special Weather Statement	LSX	Sainte Genevieve	43 min
Apr 13, 10:36 PM CDT	Special Weather Statement	LSX	Reynolds	39 min
Apr 14, 5:48 AM CDT	River Flood Warning	LSX	Reynolds	27 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2018 Every severe thunderstorm warning in 2018

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.