Alert archive / Illinois / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 78, NWS St. Louis, MO

May 11, 2016Monroe County, Randolph County, Saint Clair County, Illinois; Jefferson County, Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2016, 3:15 PM CDT for Monroe County, Randolph County, Saint Clair County, Illinois; Jefferson County, Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 45 min. 4 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: May 11, 2016, 3:15 PM CDT (20:15 UTC)
Expired: May 11, 2016, 4:00 PM CDT
In force: 45 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Jefferson County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 74 km from the middle of the area, began a volume at 20:15 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
May 11, 3:18 PM CDT	HAIL 0.5	Red Bud, IL
May 11, 3:30 PM CDT	HAIL 1.25	Red Bud, IL
May 11, 3:34 PM CDT	HAIL 2	Red Bud, IL
May 11, 3:38 PM CDT	HAIL 1	Red Bud, IL

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
May 11, 12:10 PM CDT	Severe Thunderstorm Watch	SPC	12 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.3 hours before the alert went out and 272 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

106 
WUUS53 KLSX 112015
SVRLSX
ILC133-157-163-MOC099-186-187-112100-
/O.NEW.KLSX.SV.W.0078.160511T2015Z-160511T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
315 PM CDT WED MAY 11 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
  NORTHERN RANDOLPH COUNTY IN SOUTHWESTERN ILLINOIS...
  SOUTHERN MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
  NORTHWESTERN ST. FRANCOIS COUNTY IN SOUTHEASTERN MISSOURI...
  NORTHWESTERN STE. GENEVIEVE COUNTY IN SOUTHEASTERN MISSOURI...
  SOUTHEASTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 400 PM CDT

* AT 315 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR OLYMPIAN
  VILLAGE...MOVING EAST AT 65 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...
  FESTUS...DE SOTO...CRYSTAL CITY...SPARTA...RED BUD...NEW ATHENS...
  MARISSA...OLYMPIAN VILLAGE...EVANSVILLE...BLOOMSDALE...BALDWIN...NEW
  DESIGN...PRESTON...BLAIR...PRAIRIE DU ROCHER...PRAIRIE...LENZBURG...ELLIS
  GROVE...RUMA AND HOUSTON.

THIS INCLUDES INTERSTATE 55 IN MISSOURI BETWEEN EXITS 157 AND 175.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3800 9064 3803 9064 3821 9059 3834 8971
      3801 8971
TIME...MOT...LOC 2015Z 268DEG 57KT 3814 9036 

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

GLASS

1 follow-up statement

096 
WWUS53 KLSX 112038 RRA
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
338 PM CDT WED MAY 11 2016

ILC133-157-163-MOC099-186-187-112100-
/O.CON.KLSX.SV.W.0078.000000T0000Z-160511T2100Z/
ST. CLAIR IL-RANDOLPH IL-MONROE IL-ST. FRANCOIS MO-STE. GENEVIEVE MO-
JEFFERSON MO-
338 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR SOUTHEASTERN ST. CLAIR...NORTHERN RANDOLPH...SOUTHERN MONROE...
NORTHWESTERN ST. FRANCOIS...NORTHWESTERN STE. GENEVIEVE AND
SOUTHEASTERN JEFFERSON COUNTIES...

AT 337 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER RED BUD...MOVING
EAST AT 15 MPH.

HAZARD...TENNIS BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

SOURCE...TRAINED WEATHER SPOTTERS REPORTED TWO INCH HAIL AT RED
         BUD. LARGER HAIL IS LIKELY WITH THIS STORM. 

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...
FESTUS...DE SOTO...CRYSTAL CITY...SPARTA...RED BUD...NEW ATHENS...MARISSA...
OLYMPIAN VILLAGE...EVANSVILLE...BLOOMSDALE...BALDWIN...NEW DESIGN...
PRESTON...BLAIR...PRAIRIE DU ROCHER...PRAIRIE...LENZBURG...ELLIS GROVE...
RUMA AND HOUSTON.

THIS INCLUDES INTERSTATE 55 IN MISSOURI BETWEEN EXITS 157 AND 175.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THIS IS A DANGEROUS STORM. PREPARE IMMEDIATELY FOR LARGE DESTRUCTIVE
HAIL CAPABLE OF PRODUCING SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD
MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

THIS IS A POTENTIALLY DEADLY STORM. SEEK SHELTER IN AN INTERIOR ROOM
ON THE LOWEST FLOOR OF A WELL-BUILT STRUCTURE. ABANDON VEHICLES IN
SEARCH OF A MORE SUBSTANTIAL PERMANENT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3800 9064 3803 9064 3821 9059 3834 8971
      3801 8971
TIME...MOT...LOC 2037Z 259DEG 14KT 3820 8999 

TORNADO...POSSIBLE
HAIL...2.50IN
WIND...60MPH
 
$$

TES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 3:19 AM CDT	Dense Fog Advisory	LSX	Bond, Brown, Calhoun, Clinton, Fayette, Greene and 10 more	6 hr
May 11, 1:08 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	52 min
May 11, 1:12 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	48 min
May 11, 1:51 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	54 min
May 11, 1:55 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	65 min
May 11, 2:12 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	63 min
May 11, 2:32 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Madison, Washington	43 min
May 11, 3:02 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	43 min
May 11, 3:13 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Washington	47 min
May 11, 3:43 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	33 min
May 11, 3:52 PM CDT	Flash Flood Warning	LSX	Clinton, Monroe, Randolph, Saint Clair, Washington	4 hr
May 11, 3:57 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	63 min
May 11, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair, Washington	19 min
May 11, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	60 min
May 11, 5:23 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	52 min
May 11, 5:26 PM CDT	Flash Flood Warning	LSX	Randolph	4 hr
May 11, 6:50 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Pike	40 min
May 11, 10:08 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone	52 min
May 11, 10:25 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway	50 min
May 11, 10:52 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery, Pike	38 min
May 11, 11:24 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike	51 min
May 11, 12:26 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	49 min
May 11, 12:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	46 min
May 11, 12:47 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis	28 min
May 11, 3:11 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	49 min
May 11, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois, Washington	40 min
May 11, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike, Ralls	44 min
May 11, 5:18 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	27 min
May 11, 5:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	42 min
May 11, 5:35 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	40 min
May 11, 5:45 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	45 min
May 11, 5:56 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	64 min
May 11, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Lincoln, Montgomery, Warren	48 min
May 11, 6:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Francois, Washington	46 min
May 11, 6:42 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	48 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2016 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.