Alert archive / Missouri / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 5, NWS St. Louis, MO

February 28, 2017Crawford County, Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 28, 2017, 4:01 PM CST for Crawford County, Washington County, Missouri. It was in force for 44 min. 3 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: Feb 28, 2017, 4:01 PM CST (22:01 UTC)
Expired: Feb 28, 2017, 4:45 PM CST
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Crawford County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 22:05 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
Feb 28, 4:15 PM CST	HAIL 1.75	Cherryville, MO	DELAYED REPORT. GOLF BALL HAIL CAUSED EXTENSIVE SIDING AND ROOF DAMAGE TO A HOME IN CHERRYVILLE.
Feb 28, 4:45 PM CST	HAIL 1	12 N Potosi, MO	DELAYED REPORT. PHOTO POSTED ON SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Feb 28, 4:51 PM CST	HAIL 1	Richwoods, MO

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
Feb 28, 2:19 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.0 hours before the alert went out and 270 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: 573 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 708 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 370 m²/s²
0-3 km storm-relative helicity: 379 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

As transmitted.

481 
WUUS53 KLSX 282201
SVRLSX
MOC055-221-282245-
/O.NEW.KLSX.SV.W.0005.170228T2201Z-170228T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
401 PM CST TUE FEB 28 2017

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southern Crawford County in east central Missouri...
  Washington County in east central Missouri...

* Until 445 PM CST.

* At 400 PM CST, a severe thunderstorm was located near Cherryville,
  moving northeast at 55 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Potosi, Anthonies Mill, Viburnum, Mineral Point, Richwoods,
  Courtois, Old Mines, Cherryville, Cadet, Dillard, Latty, Shirley,
  Cook Station and Davisville.

This also includes  Washington State Park and Dillard Mill Historic
Site.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

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

&&

A tornado watch remains in effect until 900 PM CST for southeastern
and east central Missouri.

LAT...LON 3770 9131 3779 9131 3779 9149 3821 9097
      3820 9078 3810 9068 3809 9068 3806 9064
      3788 9064 3774 9104 3774 9114 3770 9115
TIME...MOT...LOC 2200Z 236DEG 47KT 3776 9131 

HAIL...1.00IN
WIND...60MPH
 
$$

Britt

3 follow-up statements

077 
WWUS53 KLSX 282220
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
420 PM CST TUE FEB 28 2017

MOC055-221-282245-
/O.CON.KLSX.SV.W.0005.000000T0000Z-170228T2245Z/
Crawford MO-Washington MO-
420 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CST
FOR SOUTHEASTERN CRAWFORD AND WASHINGTON COUNTIES...

At 420 PM CST, a severe thunderstorm was located 10 miles northeast
of Cherryville, moving northeast at 60 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Potosi, Anthonies Mill, Mineral Point, Old Mines, Richwoods,
Courtois, Latty, Cadet, Shirley and Davisville.

This also includes  Washington State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

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

&&

A tornado watch remains in effect until 900 PM CST for southeastern
and east central Missouri.

LAT...LON 3779 9122 3793 9131 3821 9097 3820 9078
      3810 9068 3809 9068 3806 9064 3788 9064
      3774 9104 3774 9114
TIME...MOT...LOC 2220Z 230DEG 52KT 3793 9112 

HAIL...1.00IN
WIND...60MPH
 
$$

Kanofsky

654 
WWUS53 KLSX 282232
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
432 PM CST TUE FEB 28 2017

MOC055-282242-
/O.CAN.KLSX.SV.W.0005.000000T0000Z-170228T2245Z/
Crawford MO-
432 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CRAWFORD COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 900 PM CST for southeastern
and east central Missouri.

LAT...LON 3782 9110 3810 9110 3821 9097 3820 9078
      3810 9068 3809 9068 3806 9064 3788 9064
      3779 9089
TIME...MOT...LOC 2232Z 236DEG 47KT 3802 9095 

$$

MOC221-282245-
/O.CON.KLSX.SV.W.0005.000000T0000Z-170228T2245Z/
Washington MO-
432 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CST
FOR WASHINGTON COUNTY...

At 432 PM CST, a severe thunderstorm was located 8 miles southeast of
Anthonies Mill, moving northeast at 55 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Potosi, Anthonies Mill, Mineral Point, Old Mines, Richwoods, Latty,
Cadet and Shirley.

This also includes  Washington State Park.
 
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 900 PM CST for southeastern
and east central Missouri.

LAT...LON 3782 9110 3810 9110 3821 9097 3820 9078
      3810 9068 3809 9068 3806 9064 3788 9064
      3779 9089
TIME...MOT...LOC 2232Z 236DEG 47KT 3802 9095 

HAIL...1.00IN
WIND...60MPH
 
$$

Kanofsky

312 
WWUS53 KLSX 282250
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
450 PM CST TUE FEB 28 2017

MOC221-282300-
/O.EXP.KLSX.SV.W.0005.000000T0000Z-170228T2245Z/
Washington MO-
450 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON COUNTY HAS
EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been allowed to expire.

A tornado watch remains in effect until 900 PM CST for southeastern
and east central Missouri.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Washington County u ntil 515 PM CST.

LAT...LON 3782 9110 3810 9110 3821 9097 3820 9078
      3810 9068 3809 9068 3806 9064 3788 9064
      3779 9089
TIME...MOT...LOC 2250Z 236DEG 47KT 3815 9070 

$$

Kanofsky

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 12:50 PM CST	Wind Advisory	LSX	Audrain, Boone, Callaway, Cole, Gasconade, Knox and 11 more	5 hr
Feb 28, 2:32 PM CST	Severe Thunderstorm Warning	LSX	Crawford	43 min
Feb 28, 3:02 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Washington	43 min
Feb 28, 3:38 PM CST	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	52 min
Feb 28, 4:07 PM CST	Severe Thunderstorm Warning	LSX	Sainte Genevieve	26 min
Feb 28, 4:15 PM CST	Severe Thunderstorm Warning	LSX	Lincoln	32 min
Feb 28, 4:41 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	34 min
Feb 28, 4:58 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Washington	33 min
Feb 28, 5:10 PM CST	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	33 min
Feb 28, 5:16 PM CST	Severe Thunderstorm Warning	LSX	Jefferson, Washington	44 min
Feb 28, 5:29 PM CST	Severe Thunderstorm Warning	LSX	City of Saint Louis	46 min
Feb 28, 5:36 PM CST	Severe Thunderstorm Warning	LSX	Jefferson	39 min
Feb 28, 5:44 PM CST	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve	31 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2017 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.