Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 7, NWS St. Louis, MO

April 3, 2018Iron County, Reynolds County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 3, 2018, 3:13 PM CDT for Iron County, Reynolds County, Missouri. It was in force for 47 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: Apr 3, 2018, 3:13 PM CDT (20:13 UTC)
Expired: Apr 3, 2018, 4:00 PM CDT
In force: 47 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Iron County, MO, Reynolds County, MO

The radar

The St Louis radar (KLSX), 150 km from the middle of the area, began a volume at 20:12 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
Apr 3, 3:21 PM CDT	HAIL 1.5	Centerville, MO	DELAYED REPORT WITH PHOTO ON SOCIAL MEDIA. 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
Apr 3, 1:33 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.2 hours before the alert went out and 248 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: 893 J/kg
Mixed-layer CIN: -325 J/kg
Mixed-layer LCL: 584 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 514 m²/s²
0-3 km storm-relative helicity: 499 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

942 
WUUS53 KLSX 032013
SVRLSX
MOC093-179-032100-
/O.NEW.KLSX.SV.W.0007.180403T2013Z-180403T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
313 PM CDT TUE APR 3 2018

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Iron County in southeastern Missouri...
  Northern Reynolds County in southeastern Missouri...

* Until 400 PM CDT.

* At 312 PM CDT, a severe thunderstorm was located over Reynolds,
  moving east at 45 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...
  Reynolds, Bunker, Annapolis, Glover, Centerville, Sabula, Chloride,
  Corridon, Redford, Hogan, Lesterville and Black.

This also includes  Johnsons Shut-Ins State Park and Taum Sauk
Mountain 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 800 PM CDT for southeastern
Missouri.

LAT...LON 3731 9116 3732 9118 3741 9118 3742 9121
      3748 9121 3763 9070 3733 9065 3725 9116
TIME...MOT...LOC 2012Z 252DEG 40KT 3743 9108 

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

KD

2 follow-up statements

117 
WWUS53 KLSX 032039
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
339 PM CDT TUE APR 3 2018

MOC093-179-032100-
/O.CON.KLSX.SV.W.0007.000000T0000Z-180403T2100Z/
Iron MO-Reynolds MO-
339 PM CDT TUE APR 3 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR SOUTHEASTERN IRON AND EAST CENTRAL REYNOLDS COUNTIES...

At 338 PM CDT, a severe thunderstorm was located near Glover, moving
east at 45 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...
Annapolis, Glover, Sabula, Chloride, Redford, Hogan and Lesterville. 

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 800 PM CDT for southeastern
Missouri.

LAT...LON 3731 9106 3739 9097 3755 9069 3733 9065
      3725 9116
TIME...MOT...LOC 2038Z 252DEG 40KT 3752 9072 

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

KD

093 
WWUS53 KLSX 032051
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
351 PM CDT TUE APR 3 2018

MOC093-179-032100-
/O.EXP.KLSX.SV.W.0007.000000T0000Z-180403T2100Z/
Iron MO-Reynolds MO-
351 PM CDT TUE APR 3 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN IRON AND EAST
CENTRAL REYNOLDS COUNTIES WILL EXPIRE AT 400 PM CDT...
    
The severe thunderstorm which prompted the warning has moved out of 
most of the warned area. A new warning has replaced some of the 
eastern portions of the warning. Therefore, the warning will be 
allowed to expire.

A tornado watch remains in effect until 800 PM CDT for southeastern
Missouri.

LAT...LON 3731 9106 3739 9097 3755 9069 3733 9065
      3725 9116
TIME...MOT...LOC 2050Z 252DEG 40KT 3756 9056 

$$

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 10:37 PM CDT	Special Weather Statement	LSX	Iron, Madison, Saint Francois	53 min
Apr 2, 11:13 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	32 min
Apr 2, 11:16 PM CDT	Special Weather Statement	LSX	Crawford	29 min
Apr 2, 11:22 PM CDT	Special Weather Statement	LSX	Saint Charles	38 min
Apr 3, 12:02 AM CDT	Special Weather Statement	LSX	Saint Louis, City of Saint Louis	43 min
Apr 3, 12:38 AM CDT	Special Weather Statement	LSX	City of Saint Louis	52 min
Apr 3, 4:27 AM CDT	Freeze Warning	LSX	Iron, Madison, Reynolds	30 hr
Apr 3, 2:02 PM CDT	Special Weather Statement	LSX	Crawford, Washington	43 min
Apr 3, 2:20 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	40 min
Apr 3, 2:37 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Washington	38 min
Apr 3, 2:51 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	39 min
Apr 3, 3:14 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds, Saint Francois	46 min
Apr 3, 3:26 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	49 min
Apr 3, 3:46 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds	49 min
Apr 3, 3:58 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Sainte Genevieve, Saint Francois	25 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2018 Every severe thunderstorm warning in 2018

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.