Alert archive / Missouri / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS St. Louis, MO

February 28, 2017Marion County, Monroe County, Shelby County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 28, 2017, 7:57 PM CST for Marion County, Monroe County, Shelby County, Missouri. It was in force for 48 min. 5 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, 7:57 PM CST (01:57 UTC)
Expired: Feb 28, 2017, 8:45 PM CST
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Marion County, MO, Monroe County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 152 km from the middle of the area, began a volume at 01:58 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
Feb 28, 8:05 PM CST	TSTM WND GST 43	7 N Holliday, MO
Feb 28, 8:05 PM CST	HAIL 0.75	7 N Holliday, MO
Feb 28, 8:11 PM CST	HAIL 1.25	5 S Shelbina, MO
Feb 28, 8:30 PM CST	TSTM WND GST 60	Monroe City, MO
Feb 28, 8:30 PM CST	HAIL 1	Monroe City, 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, 2:57 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.0 hours before the alert went out and 251 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: 23 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

202 
WUUS53 KLSX 010157
SVRLSX
MOC127-137-205-010245-
/O.NEW.KLSX.SV.W.0021.170301T0157Z-170301T0245Z/

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

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southwestern Marion County in northeastern Missouri...
  Southeastern Shelby County in northeastern Missouri...
  Monroe County in northeastern Missouri...

* Until 845 PM CST.

* At 756 PM CST, a severe thunderstorm was located near Woodlawn,
  moving northeast at 55 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Trained weather spotters. 

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

* Locations impacted include...
  Monroe City, Shelbina, Paris, Warren, Madison, Maud, Woodlawn,
  Granville, Emden, Philadelphia, Hunnewell, Holliday, Stoutsville,
  Florida, Duncans Bridge and Indian Creek.

This also includes  Union Covered Bridge Historic Site and Mark Twain
Lake Recreational Area.
 
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 1000 PM CST for northeastern
Missouri.

LAT...LON 3988 9171 3947 9172 3939 9231 3960 9230
TIME...MOT...LOC 0156Z 243DEG 46KT 3954 9225 

HAIL...1.25IN
WIND...60MPH
 
$$

Britt

2 follow-up statements

391 
WWUS53 KLSX 010217
SVSLSX

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

MOC127-137-205-010245-
/O.CON.KLSX.SV.W.0021.000000T0000Z-170301T0245Z/
Marion MO-Shelby MO-Monroe MO-
817 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CST
FOR SOUTHWESTERN MARION...SOUTHEASTERN SHELBY AND NORTHEASTERN MONROE
COUNTIES...

At 816 PM CST, a severe thunderstorm was located 7 miles southeast of
Shelbina, moving northeast at 55 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

SOURCE...Trained weather spotters. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Monroe City, Paris, Warren, Philadelphia, Hunnewell, Stoutsville,
Florida and Indian Creek.

This also includes  Mark Twain Lake Recreational Area.
 
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 1000 PM CST for northeastern
Missouri.

LAT...LON 3988 9171 3947 9172 3947 9209 3965 9208
TIME...MOT...LOC 0216Z 245DEG 49KT 3963 9193 

HAIL...1.50IN
WIND...60MPH
 
$$

Britt

299 
WWUS53 KLSX 010240
SVSLSX

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

MOC127-137-205-010249-
/O.EXP.KLSX.SV.W.0021.000000T0000Z-170301T0245Z/
Marion MO-Shelby MO-Monroe MO-
840 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MARION...
SOUTHEASTERN SHELBY AND NORTHEASTERN MONROE COUNTIES WILL EXPIRE AT
845 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 1000 PM CST for northeastern
Missouri.

LAT...LON 3988 9171 3947 9172 3947 9209 3965 9208
TIME...MOT...LOC 0239Z 243DEG 46KT 3976 9160 

$$

Britt

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 6:14 PM CST	Tornado Warning	LSX	Reynolds	30 min
Feb 28, 6:16 PM CST	Severe Thunderstorm Warning	LSX	Iron, Reynolds	44 min
Feb 28, 6:56 PM CST	Tornado Warning	LSX	Iron, Madison, Reynolds, Saint Francois	34 min
Feb 28, 6:59 PM CST	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois	46 min
Feb 28, 7:30 PM CST	Tornado Warning	LSX	Madison, Sainte Genevieve, Saint Francois	19 min
Feb 28, 7:34 PM CST	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	17 min
Feb 28, 8:29 PM CST	Severe Thunderstorm Warning	LSX	Marion, Ralls	33 min
Feb 28, 8:37 PM CST	Tornado Warning	LSX	Marion, Ralls	27 min
Feb 28, 9:19 PM CST	Severe Thunderstorm Warning	LSX	Madison	17 min
Feb 28, 9:23 PM CST	Tornado Warning	LSX	Madison	11 min
Feb 28, 11:04 PM CST	Severe Thunderstorm Warning	LSX	Boone, Moniteau	41 min
Mar 1, 1:43 AM CST	Special Weather Statement	LSX	Crawford, Franklin, Washington	47 min
Mar 1, 1:56 AM CST	Special Weather Statement	LSX	Saint Louis, City of Saint Louis	34 min
Mar 1, 2:15 AM CST	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	34 min
Mar 1, 2:17 AM CST	Special Weather Statement	LSX	Iron, Sainte Genevieve, Saint Francois, Washington	43 min
Mar 1, 3:11 AM CST	Severe Thunderstorm Warning	LSX	Iron, Reynolds	36 min
Mar 1, 3:37 AM CST	Special Weather Statement	LSX	Madison	23 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.