Alert archive / Missouri / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 52, NWS St. Louis, MO

April 30, 2016Crawford County, Iron County, Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 30, 2016, 8:34 PM CDT for Crawford County, Iron County, Washington 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: Apr 30, 2016, 8:34 PM CDT (01:34 UTC)
Expired: Apr 30, 2016, 9:15 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Crawford County, MO, Iron County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 110 km from the middle of the area, began a volume at 01:33 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 30, 9:22 PM CDT	HAIL 0.25	12 S Sullivan, MO	PEA SIZED HAIL COVERING THE GROUND.

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 30, 3:59 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.6 hours before the alert went out and 249 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: 756 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1187 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

443 
WUUS53 KLSX 010134
SVRLSX
MOC055-093-221-010215-
/O.NEW.KLSX.SV.W.0052.160501T0134Z-160501T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
834 PM CDT SAT APR 30 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN IRON COUNTY IN SOUTHEASTERN MISSOURI...
  CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 915 PM CDT

* AT 834 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CHERRYVILLE...
  MOVING NORTHEAST AT 35 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* LOCATIONS IMPACTED INCLUDE...
  CUBA...POTOSI...STEELVILLE...BOURBON...ANTHONIES MILL...VIBURNUM...
  LEASBURG...CHERRYVILLE...COURTOIS...DILLARD...COOK STATION...DAVISVILLE...
  LATTY AND SHIRLEY.

THIS INCLUDES INTERSTATE 44 IN MISSOURI BETWEEN EXITS 214 AND 218.
 
THIS ALSO INCLUDES  ONONDAGA CAVE STATE PARK AND DILLARD MILL
HISTORIC SITE.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3770 9116 3770 9131 3779 9131 3779 9149
      3781 9152 3820 9131 3790 9067 3769 9115
TIME...MOT...LOC 0134Z 221DEG 29KT 3781 9137 

HAIL...1.00IN
WIND...<50MPH
 
$$

GKS

2 follow-up statements

729 
WWUS53 KLSX 010201
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
901 PM CDT SAT APR 30 2016

MOC055-093-221-010215-
/O.CON.KLSX.SV.W.0052.000000T0000Z-160501T0215Z/
IRON MO-CRAWFORD MO-WASHINGTON MO-
901 PM CDT SAT APR 30 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN IRON...CRAWFORD AND SOUTHERN WASHINGTON COUNTIES...

AT 900 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ANTHONIES MILL...
MOVING NORTHEAST AT 30 MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

LOCATIONS IMPACTED INCLUDE...
CUBA...POTOSI...STEELVILLE...BOURBON...ANTHONIES MILL...VIBURNUM...
LEASBURG...CHERRYVILLE...COURTOIS...DILLARD...COOK STATION...DAVISVILLE...
LATTY AND SHIRLEY.

THIS ALSO INCLUDES  ONONDAGA CAVE STATE PARK AND DILLARD MILL
HISTORIC SITE.
 
THIS INCLUDES INTERSTATE 44 IN MISSOURI BETWEEN EXITS 214 AND 218.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3770 9116 3770 9131 3779 9131 3779 9149
      3781 9152 3820 9131 3790 9067 3769 9115
TIME...MOT...LOC 0200Z 222DEG 35KT 3801 9114 

HAIL...1.00IN
WIND...<50MPH
 
$$

GKS

841 
WWUS53 KLSX 010217
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
917 PM CDT SAT APR 30 2016

MOC055-093-221-010226-
/O.EXP.KLSX.SV.W.0052.000000T0000Z-160501T0215Z/
IRON MO-CRAWFORD MO-WASHINGTON MO-
917 PM CDT SAT APR 30 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN IRON...CRAWFORD
AND SOUTHERN WASHINGTON COUNTIES HAS EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.  HOWEVER SMALL
HAIL...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
SOUTHEASTERN MISSOURI.

LAT...LON 3770 9116 3770 9131 3779 9131 3779 9149
      3781 9152 3820 9131 3790 9067 3769 9115
TIME...MOT...LOC 0212Z 221DEG 29KT 3801 9114 

$$

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:02 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis	43 min
Apr 30, 7:25 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	50 min
Apr 30, 7:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Washington	49 min
Apr 30, 7:43 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	47 min
Apr 30, 8:31 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2016 Every severe thunderstorm warning in 2016

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.