Alert archive / Missouri / Tornado Warnings in 2018

Tornado Warning 2, NWS St. Louis, MO

April 13, 2018Crawford County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 13, 2018, 8:51 PM CDT for Crawford County, Missouri. It was in force for 24 min. 2 reports 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, 8:51 PM CDT (01:51 UTC)
Expired: Apr 13, 2018, 9:15 PM CDT
In force: 24 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Crawford County, MO

The radar

The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 01:50 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, 9:03 PM CDT	TSTM WND DMG	Steelville, MO	TREES AND POWER LINES DOWN IN TOWN.
Apr 13, 9:08 PM CDT	TSTM WND DMG	Cuba, MO	MULTIPLE TREES/LARGE LIMBS DOWN. FACEBOOK REPORT. TIME ESTIMATED FROM RADAR.

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, 1.9 hours before the alert went out and 246 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.

764 
WFUS53 KLSX 140151
TORLSX
MOC055-140215-
/O.NEW.KLSX.TO.W.0002.180414T0151Z-180414T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
851 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...

* Until 915 PM CDT.

* At 851 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles south of St. James, 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. 

* This dangerous storm will be near...
  Steelville around 905 PM CDT. 
  Cuba around 910 PM CDT. 
  Bourbon and Leasburg around 915 PM CDT. 

This also includes  Onondaga Cave State Park.
 
This includes Interstate 44 in Missouri between exits 203 and 214.
 
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 3804 9152 3821 9137 3808 9114 3786 9153
TIME...MOT...LOC 0151Z 225DEG 44KT 3788 9160 

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

$$

CVKING

1 follow-up statement

327 
WWUS53 KLSX 140208
SVSLSX

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

MOC055-140215-
/O.CON.KLSX.TO.W.0002.000000T0000Z-180414T0215Z/
Crawford MO-
908 PM CDT FRI APR 13 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR NORTHERN
CRAWFORD COUNTY...
    
At 908 PM CDT, a severe thunderstorm capable of producing a tornado
was located just south of Cuba, 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. 

This tornadic thunderstorm will remain over mainly rural areas of
northern Crawford County.

This also includes  Onondaga Cave State Park.
 
This includes Interstate 44 in Missouri between exits 203 and 214.
 
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 3804 9152 3821 9137 3808 9114 3792 9142
      3793 9153
TIME...MOT...LOC 0208Z 219DEG 42KT 3803 9136 

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

$$

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, 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

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.