Alert archive / Missouri / Tornado Warnings in 2018

Tornado Warning 3, NWS St. Louis, MO

April 13, 2018Crawford County, Franklin County, Washington County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 13, 2018, 9:13 PM CDT for Crawford County, Franklin County, Washington County, Missouri. It was in force for 47 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: Apr 13, 2018, 9:13 PM CDT (02:13 UTC)
Expired: Apr 13, 2018, 10:00 PM CDT
In force: 47 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Crawford County, MO, Franklin County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 79 km from the middle of the area, began a volume at 02:14 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
Apr 13, 9:49 PM CDT	TSTM WND DMG	Saint Clair, MO	AMEREN REPORTS TREES DOWN ON POWERLINES IN SAINT CLAIR.

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
Apr 13, 5:27 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.2 hours before the alert went out and 263 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.

274 
WFUS53 KLSX 140213
TORLSX
MOC055-071-221-140300-
/O.NEW.KLSX.TO.W.0003.180414T0213Z-180414T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
913 PM CDT FRI APR 13 2018

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northern Crawford County in east central Missouri...
  Northwestern Washington County in east central Missouri...
  Southern Franklin County in east central Missouri...

* Until 1000 PM CDT.

* At 913 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Leasburg, moving northeast at 40 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. 

* This dangerous storm will be near...
  Bourbon around 925 PM CDT. 
  Oak Grove around 935 PM CDT. 
  Sullivan and Miramiguoa Park around 940 PM CDT. 
  St. Clair and Parkway around 955 PM CDT. 
  Union around 1000 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Noser
Mill, Japan, St. Cloud, Stanton and Piney Park.

This also includes  Onondaga Cave State Park and Meramec State Park.
 
This includes Interstate 44 in Missouri between exits 203 and 242.
 
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 3788 9135 3803 9153 3821 9138 3821 9137
      3823 9137 3856 9110 3827 9077
TIME...MOT...LOC 0213Z 218DEG 33KT 3808 9134 

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

$$

CVKING

3 follow-up statements

194 
WWUS53 KLSX 140221
SVSLSX

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

MOC055-071-221-140300-
/O.CON.KLSX.TO.W.0003.000000T0000Z-180414T0300Z/
Crawford MO-Washington MO-Franklin MO-
921 PM CDT FRI APR 13 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR NORTHERN
CRAWFORD...NORTHWESTERN WASHINGTON AND SOUTHERN FRANKLIN COUNTIES...

At 921 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located along a
line extending from 7 miles northwest of Leasburg to Bourbon to near
Anthonies Mill, moving northeast at 50 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...
Union, Sullivan, St. Clair, Cuba, Bourbon, Anthonies Mill, Parkway,
Leasburg, Miramiguoa Park, Beaufort, Lonedell, St. Cloud, Noser Mill,
Japan, Stanton and Piney Park.

This also includes  Onondaga Cave State Park and Meramec State Park.
 
This includes Interstate 44 in Missouri between exits 208 and 242.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3795 9125 3811 9147 3821 9138 3821 9137
      3823 9137 3856 9110 3827 9077
TIME...MOT...LOC 0221Z 224DEG 43KT 3818 9139 3816 9122 3805 9111 

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

$$

CVKING

155 
WWUS53 KLSX 140231
SVSLSX

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

MOC055-071-221-140300-
/O.CON.KLSX.TO.W.0003.000000T0000Z-180414T0300Z/
Crawford MO-Washington MO-Franklin MO-
931 PM CDT FRI APR 13 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NORTHEASTERN CRAWFORD...NORTHWESTERN WASHINGTON AND SOUTHERN FRANKLIN
COUNTIES...

At 930 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located along a
line extending from 6 miles northwest of Sullivan to near Miramiguoa
Park to 8 miles northeast of Anthonies Mill, moving northeast at 55
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...
Union, Sullivan, St. Clair, Bourbon, Anthonies Mill, Parkway,
Miramiguoa Park, Beaufort, Lonedell, St. Cloud, Noser Mill, Japan,
Stanton and Piney Park.

This also includes  Meramec State Park.
 
This includes Interstate 44 in Missouri between exits 218 and 242.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3805 9110 3821 9137 3823 9137 3856 9110
      3827 9077
TIME...MOT...LOC 0230Z 223DEG 49KT 3828 9125 3824 9111 3819 9101 

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

$$

CVKING

297 
WWUS53 KLSX 140256
SVSLSX

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

MOC055-071-221-140305-
/O.EXP.KLSX.TO.W.0003.000000T0000Z-180414T0300Z/
Crawford MO-Washington MO-Franklin MO-
956 PM CDT FRI APR 13 2018

...THE TORNADO WARNING FOR NORTHEASTERN CRAWFORD...NORTHWESTERN
WASHINGTON AND SOUTHERN FRANKLIN COUNTIES WILL EXPIRE AT 1000 PM
CDT...

The immediate tornado threat has diminished and the Tornado Warning 
has been cancelled. However, damaging winds remain likely and a 
quick spin up tornado is still possible, therefore a Severe 
Thunderstorm Warning has been issued for portions of the 
area.

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

LAT...LON 3805 9110 3821 9137 3823 9137 3856 9110
      3827 9077
TIME...MOT...LOC 0255Z 218DEG 33KT 3845 9108 3841 9094 3836 9084 

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:05 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	40 min
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, 9:24 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

Tornado Warnings in Missouri, 2018 Every tornado warning in 2018 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.