Alert archive / Missouri / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 25, NWS St. Louis, MO

February 28, 2017Boone County, Moniteau County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 28, 2017, 11:04 PM CST for Boone County, Moniteau County, Missouri. It was in force for 41 min. 1 report 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, 11:04 PM CST (05:04 UTC)
Expired: Feb 28, 2017, 11:45 PM CST
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Boone County, MO, Moniteau County, MO

The radar

The St Louis radar (KLSX), 141 km from the middle of the area, began a volume at 05:08 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, 11:21 PM CST	HAIL 1	Columbia, MO	REPORTED ON THE WEST SIDE OF COLUMBIA.

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, 9:04 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.1 hours before the alert went out and 256 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.

135 
WUUS53 KLSX 010504
SVRLSX
MOC019-135-010545-
/O.NEW.KLSX.SV.W.0025.170301T0504Z-170301T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1104 PM CST TUE FEB 28 2017

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Central Boone County in central Missouri...
  Northeastern Moniteau County in central Missouri...

* Until 1145 PM CST.

* At 1104 PM CST, a severe thunderstorm was located 8 miles southeast
  of Boonville, moving east at 55 mph.

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

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Columbia, Ashland, Columbia Regional Airport, Jamestown, Easley,
  Murry, Midway, Lupus, McBaine, Sandy Hook and Wilton.

This includes Interstate 70 in Missouri between exits 115 and 133.
 
This also includes  Rock Bridge State Park and Jewell Cemetery
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 400 AM CST for central
Missouri.

LAT...LON 3892 9250 3897 9255 3906 9213 3903 9214
      3902 9213 3898 9215 3893 9215 3890 9217
      3889 9216 3872 9220 3871 9222 3872 9235
      3874 9239 3873 9240 3873 9259
TIME...MOT...LOC 0504Z 257DEG 46KT 3886 9265 

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

Glass

3 follow-up statements

525 
WWUS53 KLSX 010520
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1120 PM CST TUE FEB 28 2017

MOC019-135-010545-
/O.CON.KLSX.SV.W.0025.000000T0000Z-170301T0545Z/
Boone MO-Moniteau MO-
1120 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CST
FOR CENTRAL BOONE AND NORTHEASTERN MONITEAU COUNTIES...

At 1120 PM CST, a severe thunderstorm was located over Columbia,
moving east at 70 mph.

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

SOURCE...Radar indicated. 

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

Locations impacted include...
Columbia, Columbia Regional Airport, Murry, Midway, Lupus and
McBaine.

This also includes  Rock Bridge State Park and Jewell Cemetery
Historic Site.
 
This includes Interstate 70 in Missouri between exits 115 and 133.
 
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 400 AM CST for central
Missouri.

LAT...LON 3892 9250 3897 9255 3906 9213 3903 9214
      3902 9213 3898 9215 3893 9215 3890 9217
      3889 9216 3880 9218 3881 9237 3885 9252
TIME...MOT...LOC 0520Z 253DEG 59KT 3894 9236 

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

Glass

177 
WWUS53 KLSX 010525
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1125 PM CST TUE FEB 28 2017

MOC135-010535-
/O.CAN.KLSX.SV.W.0025.000000T0000Z-170301T0545Z/
Moniteau MO-
1125 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONITEAU 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 400 AM CST for central
Missouri.

LAT...LON 3892 9244 3900 9243 3906 9213 3903 9214
      3902 9213 3898 9215 3893 9215 3890 9217
      3889 9216 3880 9218 3883 9234 3886 9242
TIME...MOT...LOC 0525Z 257DEG 46KT 3895 9228 

$$

MOC019-010545-
/O.CON.KLSX.SV.W.0025.000000T0000Z-170301T0545Z/
Boone MO-
1125 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CST
FOR CENTRAL BOONE COUNTY...

At 1125 PM CST, a severe thunderstorm was located over Columbia,
moving east at 55 mph.

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

SOURCE...Trained weather spotters. Several reports of quarter size 
         hail from spotters.

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

Locations impacted include...
Columbia, Columbia Regional Airport and Murry. 

This also includes  Rock Bridge State Park and Jewell Cemetery
Historic Site.
 
This includes Interstate 70 in Missouri between exits 121 and 133.
 
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 400 AM CST for central
Missouri.

LAT...LON 3892 9244 3900 9243 3906 9213 3903 9214
      3902 9213 3898 9215 3893 9215 3890 9217
      3889 9216 3880 9218 3883 9234 3886 9242
TIME...MOT...LOC 0525Z 257DEG 46KT 3895 9228 

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

Glass

443 
WWUS53 KLSX 010537
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1137 PM CST TUE FEB 28 2017

MOC019-010546-
/O.EXP.KLSX.SV.W.0025.000000T0000Z-170301T0545Z/
Boone MO-
1137 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BOONE COUNTY WILL
EXPIRE AT 1145 PM CST...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds and heavy rain are still
possible with this thunderstorm.

A tornado watch remains in effect until 400 AM CST for central
Missouri.

LAT...LON 3892 9244 3900 9243 3906 9213 3903 9214
      3902 9213 3898 9215 3893 9215 3890 9217
      3889 9216 3880 9218 3883 9234 3886 9242
TIME...MOT...LOC 0536Z 257DEG 46KT 3898 9211 

$$

Glass

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, 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
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.