Alert archive / Missouri / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 19, NWS St. Louis, MO

February 28, 20174 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 28, 2017, 6:59 PM CST for 4 counties in Missouri. It was in force for 46 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, 6:59 PM CST (00:59 UTC)
Expired: Feb 28, 2017, 7:45 PM CST
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Iron County, MO, Madison County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 119 km from the middle of the area, began a volume at 01:00 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, 7:08 PM CST	TSTM WND DMG	1 Se Iron Mountain, MO	DELAYED REPORT. ROOFING BLOWN OFF OF A BUILDING AT IRON MOUNTAIN LAKE. TIME ESTIMATED FROM RADAR.
Feb 28, 7:16 PM CST	TORNADO	12 Wnw Fredericktown, MO	EF0 TORNADO WITH MAXIMUM WIND SPEED OF 85 MPH. 4.5 MILES LONG AND 50 YARDS WIDE. MAINLY TREE DAMAGE NOTED ALONG PATH... WITH ONE BARN DESTROYED.
Feb 28, 7:23 PM CST	TSTM WND DMG	5 E Roselle, MO	BARN DESTROYED ALONG MADISON COUNTY ROAD 529. 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
Feb 28, 2:19 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.0 hours before the alert went out and 311 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: 1117 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 315 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

As transmitted.

088 
WUUS53 KLSX 010059
SVRLSX
MOC093-123-186-187-010145-
/O.NEW.KLSX.SV.W.0019.170301T0059Z-170301T0145Z/

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

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Northeastern Iron County in southeastern Missouri...
  Southwestern Ste. Genevieve County in southeastern Missouri...
  Northern Madison County in southeastern Missouri...
  Southern St. Francois County in southeastern Missouri...

* Until 745 PM CST.

* At 658 PM CST, a severe thunderstorm was located near Glover,
  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...
  Farmington, Fredericktown, Ironton, Park Hills, Pilot Knob, Iron
  Mountain Lake, Arcadia, Junction City, Cobalt, Womac, Knob Lick,
  Iron Mountain, Weingarten, Coffman, Glover, Roselle, Catherine
  Place, Hogan, Granite and Mine La Motte.

This also includes  Hawn State Park, Fort Davidson Historic Site, and
Elephant Rocks 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
Missouri.

LAT...LON 3767 9077 3790 9021 3770 9009 3764 9015
      3750 9014 3744 9077
TIME...MOT...LOC 0058Z 246DEG 51KT 3755 9069 

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

Kanofsky

3 follow-up statements

880 
WWUS53 KLSX 010110
SVSLSX

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

MOC093-123-186-187-010145-
/O.CON.KLSX.SV.W.0019.000000T0000Z-170301T0145Z/
Iron MO-Ste. Genevieve MO-Madison MO-St. Francois MO-
710 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CST
FOR NORTHEASTERN IRON...SOUTHWESTERN STE. GENEVIEVE...NORTHERN
MADISON AND SOUTHERN ST. FRANCOIS COUNTIES IN SOUTHEASTERN
MISSOURI...

At 710 PM CST, a severe thunderstorm was located over Roselle, 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...
Farmington, Fredericktown, Ironton, Park Hills, Pilot Knob, Iron
Mountain Lake, Arcadia, Junction City, Cobalt, Womac, Knob Lick, Iron
Mountain, Weingarten, Coffman, Roselle, Catherine Place, Mine La
Motte, Libertyville and Doe Run.

This also includes  Hawn State Park and Fort Davidson Historic Site.
 
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
Missouri.

LAT...LON 3771 9067 3790 9021 3770 9009 3764 9015
      3753 9014 3749 9066
TIME...MOT...LOC 0110Z 246DEG 51KT 3762 9049 

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

Kanofsky

210 
WWUS53 KLSX 010120
SVSLSX

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

MOC093-010129-
/O.CAN.KLSX.SV.W.0019.000000T0000Z-170301T0145Z/
Iron MO-
720 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN IRON 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
Missouri.

LAT...LON 3764 9053 3764 9054 3775 9054 3790 9021
      3770 9009 3764 9015 3754 9014 3752 9054
TIME...MOT...LOC 0119Z 246DEG 51KT 3768 9033 

$$

MOC123-186-187-010145-
/O.CON.KLSX.SV.W.0019.000000T0000Z-170301T0145Z/
Ste. Genevieve MO-Madison MO-St. Francois MO-
720 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CST
FOR SOUTHWESTERN STE. GENEVIEVE...NORTHERN MADISON AND SOUTHERN ST.
FRANCOIS COUNTIES IN SOUTHEASTERN MISSOURI...

At 719 PM CST, a severe thunderstorm was located over Knob Lick,
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...
Farmington, Fredericktown, Park Hills, Junction City, Cobalt, Womac,
Knob Lick, Weingarten, Coffman, Roselle, Catherine Place, Mine La
Motte, Libertyville and Doe Run.

This also includes  Hawn 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
Missouri.

LAT...LON 3764 9053 3764 9054 3775 9054 3790 9021
      3770 9009 3764 9015 3754 9014 3752 9054
TIME...MOT...LOC 0119Z 246DEG 51KT 3768 9033 

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

Kanofsky

327 
WWUS53 KLSX 010139
SVSLSX

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

MOC123-186-187-010148-
/O.EXP.KLSX.SV.W.0019.000000T0000Z-170301T0145Z/
Ste. Genevieve MO-Madison MO-St. Francois MO-
739 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN STE. GENEVIEVE...
NORTHERN MADISON AND SOUTHERN ST. FRANCOIS COUNTIES IN SOUTHEASTERN
MISSOURI WILL EXPIRE AT 745 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 900 PM CST for southeastern
Missouri.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Ste. Genevieve and St. Francois Counties. 

Remember, a Tornado Warning still remains in effect for portions of 
St. Francois and Ste. Genevieve Counties.

LAT...LON 3764 9053 3764 9054 3775 9054 3790 9021
      3770 9009 3764 9015 3754 9014 3752 9054
TIME...MOT...LOC 0138Z 246DEG 51KT 3779 9002 

$$

Kanofsky

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, 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, 7:57 PM CST	Severe Thunderstorm Warning	LSX	Marion, Monroe, Shelby	48 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.