Alert archive / Missouri / Tornado Warnings in 2017

Tornado Warning 19, NWS St. Louis, MO

May 27, 2017Crawford County, Missouri

NWS St. Louis, MO issued this tornado warning at May 27, 2017, 12:55 PM CDT for Crawford County, Missouri. It was in force for 11 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: May 27, 2017, 12:55 PM CDT (17:55 UTC)
Expired: May 27, 2017, 1:06 PM CDT
In force: 11 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Crawford County, MO

The radar

The St Louis radar (KLSX), 90 km from the middle of the area, began a volume at 17:57 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
May 27, 12:13 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 5.9 hours before the alert went out and 254 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: 3187 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

As transmitted.

553 
WFUS53 KLSX 271755
TORLSX
MOC055-271845-
/O.NEW.KLSX.TO.W.0019.170527T1755Z-170527T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
1255 PM CDT SAT MAY 27 2017

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northern Crawford County in east central Missouri...

* Until 145 PM CDT.

* At 1255 PM CDT, a severe thunderstorm capable of producing a
  tornado was located near Cuba, moving east at 25 mph.

  HAZARD...Tornado and quarter 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...
  Cuba around 100 PM CDT. 
  Bourbon and Leasburg around 115 PM CDT. 

This also includes  Onondaga Cave State Park.
 
This includes Interstate 44 in Missouri between exits 208 and 218.
 
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 3808 9152 3819 9145 3813 9110 3791 9110
TIME...MOT...LOC 1755Z 291DEG 20KT 3811 9143 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Tilly

1 follow-up statement

122 
WWUS53 KLSX 271806
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
106 PM CDT SAT MAY 27 2017

MOC055-271816-
/O.CAN.KLSX.TO.W.0019.000000T0000Z-170527T1845Z/
Crawford MO-
106 PM CDT SAT MAY 27 2017

...THE TORNADO WARNING FOR NORTHERN CRAWFORD COUNTY 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.

A tornado watch remains in effect until 700 PM CDT for east central
Missouri.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
St Louis.

LAT...LON 3808 9152 3819 9145 3813 9110 3791 9110
TIME...MOT...LOC 1804Z 291DEG 20KT 3809 9136 

$$

Tilly

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 11:37 AM CDT	Special Weather Statement	LSX	Gasconade	38 min
May 27, 11:51 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	39 min
May 27, 12:31 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Washington	44 min
May 27, 1:14 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Osage	46 min
May 27, 1:21 PM CDT	Tornado Warning	LSX	Cole, Osage	39 min
May 27, 1:33 PM CDT	Special Weather Statement	LSX	Sainte Genevieve	42 min
May 27, 1:39 PM CDT	Severe Thunderstorm Warning	LSX	Boone	37 min
May 27, 1:44 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	61 min
May 27, 1:48 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	42 min
May 27, 1:52 PM CDT	Tornado Warning	LSX	Reynolds	38 min
May 27, 1:56 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, City of Saint Louis	23 min
May 27, 1:58 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	51 min
May 27, 2:24 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Cole, Moniteau	51 min
May 27, 2:27 PM CDT	Tornado Warning	LSX	Reynolds	48 min
May 27, 2:58 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Osage	47 min
May 27, 3:10 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	54 min
May 27, 3:35 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Osage, Warren	55 min
May 27, 3:37 PM CDT	Severe Thunderstorm Warning	LSX	Madison	53 min
May 27, 4:06 PM CDT	Tornado Warning	LSX	Crawford, Iron, Reynolds, Washington	54 min
May 27, 4:12 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	34 min
May 27, 4:19 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	56 min
May 27, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Sainte Genevieve, Saint Francois	45 min

Nearby

Tornado Warnings in Missouri, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.