Alert archive / Illinois / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 70, NWS St. Louis, MO

May 11, 2016Monroe County, Saint Clair County, Illinois; Jefferson County, Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2016, 1:12 PM CDT for Monroe County, Saint Clair County, Illinois; Jefferson County, Saint Louis County, Missouri. It was in force for 48 min. 22 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, 1:12 PM CDT (18:12 UTC)
Expired: May 11, 2016, 2:00 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Monroe County, IL, Saint Clair County, IL, Jefferson County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 39 km from the middle of the area, began a volume at 18:11 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
May 11, 1:12 PM CDT	HAIL 0.7	Byrnes Mill, MO
May 11, 1:20 PM CDT	TSTM WND DMG	4 Wsw Arnold, MO	TREE DOWN
May 11, 1:20 PM CDT	HAIL 1	4 Wsw Arnold, MO	TREE DOWN
May 11, 1:25 PM CDT	HAIL 0.25	High Ridge, MO
May 11, 1:34 PM CDT	HAIL 0.75	Barnhart, MO
May 11, 1:34 PM CDT	HAIL 1.25	Arnold, MO	ALONG RICHARDSON ROAD IN ARNOLD.
May 11, 1:35 PM CDT	TSTM WND DMG	Arnold, MO	TREES AND POWER LINES DOWN
May 11, 1:35 PM CDT	TSTM WND DMG	Imperial, MO	TREES AND POWER LINES DOWN
May 11, 1:37 PM CDT	HAIL 1.75	Arnold, MO
May 11, 1:38 PM CDT	HAIL 1	Imperial, MO
May 11, 1:38 PM CDT	HAIL 1	Kimmswick, MO
May 11, 1:38 PM CDT	HAIL 2.5	Arnold, MO
May 11, 1:41 PM CDT	HAIL 1	Arnold, MO	HWY 141 AT 1-55
May 11, 1:45 PM CDT	TSTM WND GST 50	Oakville, MO
May 11, 1:45 PM CDT	HAIL 1	Oakville, MO
May 11, 1:45 PM CDT	HAIL 1	Pevely, MO
May 11, 1:46 PM CDT	HAIL 0.88	Oakville, MO
May 11, 1:50 PM CDT	HAIL 0.7	Arnold, MO
May 11, 1:50 PM CDT	HAIL 1	New Handover, IL
May 11, 1:55 PM CDT	HAIL 1	1 Ne Eureka, MO	OBSERVED IN CRESCENT MO.
May 11, 1:55 PM CDT	HAIL 1	New Handover, IL
May 11, 1:58 PM CDT	HAIL 1	1 N Columbia, IL	NORTHERN SIDE OF TOWN.

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, 6.2 hours before the alert went out and 240 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.

870 
WUUS53 KLSX 111812
SVRLSX
ILC133-163-MOC099-189-111900-
/O.NEW.KLSX.SV.W.0070.160511T1812Z-160511T1900Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
  NORTHWESTERN MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
  SOUTHWESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
  NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 200 PM CDT

* AT 112 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HOUSE
  SPRINGS...MOVING EAST AT 30 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* LOCATIONS IMPACTED INCLUDE...
  BELLEVILLE...WILDWOOD...KIRKWOOD...EAST ST. LOUIS...ARNOLD...CAHOKIA...
  CRESTWOOD...EUREKA...WATERLOO...COLUMBIA...SUNSET HILLS...VALLEY PARK...
  PEVELY...CENTREVILLE...DUPO...FENTON...MILLSTADT...HERCULANEUM...BYRNES
  MILL AND LAKESHIRE.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 44 IN MISSOURI BETWEEN EXITS 264 AND 276.
 INTERSTATE 55 IN MISSOURI BETWEEN EXITS 180 AND 191.

THIS ALSO INCLUDES  ROUTE 66 STATE PARK...MASTODON HISTORIC SITE...
SANDY CREEK COVERED BRIDGE HISTORIC SITE...AND GOV. DUNKLIN'S GRAVE
HISTORIC SITE.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3825 9071 3853 9065 3857 9030 3855 9027
      3853 9027 3853 9026 3858 9021 3860 9006
      3829 9006
TIME...MOT...LOC 1812Z 256DEG 24KT 3842 9051 

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

GLASS

2 follow-up statements

333 
WWUS53 KLSX 111827
SVSLSX

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

ILC133-163-MOC099-189-111900-
/O.CON.KLSX.SV.W.0070.000000T0000Z-160511T1900Z/
ST. CLAIR IL-MONROE IL-ST. LOUIS MO-JEFFERSON MO-
127 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR NORTHWESTERN ST. CLAIR...NORTHWESTERN MONROE...SOUTHWESTERN ST.
LOUIS AND NORTHEASTERN JEFFERSON COUNTIES...

AT 127 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER ARNOLD...MOVING
EAST AT 30 MPH.

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

SOURCE...RADAR INDICATED. 

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...
BELLEVILLE...WILDWOOD...KIRKWOOD...EAST ST. LOUIS...ARNOLD...CAHOKIA...
CRESTWOOD...EUREKA...WATERLOO...COLUMBIA...SUNSET HILLS...VALLEY PARK...
PEVELY...CENTREVILLE...DUPO...FENTON...MILLSTADT...HERCULANEUM...BYRNES
MILL AND LAKESHIRE.

THIS ALSO INCLUDES  ROUTE 66 STATE PARK...MASTODON HISTORIC SITE...
SANDY CREEK COVERED BRIDGE HISTORIC SITE...AND GOV. DUNKLIN'S GRAVE
HISTORIC SITE.
 
THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 44 IN MISSOURI BETWEEN EXITS 264 AND 276.
 INTERSTATE 55 IN MISSOURI BETWEEN EXITS 180 AND 191.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3827 9059 3853 9065 3857 9030 3855 9027
      3853 9027 3853 9026 3858 9021 3860 9006
      3829 9006
TIME...MOT...LOC 1827Z 256DEG 24KT 3844 9039 

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

GLASS

197 
WWUS53 KLSX 111838
SVSLSX

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

ILC133-163-MOC099-189-111900-
/O.CON.KLSX.SV.W.0070.000000T0000Z-160511T1900Z/
ST. CLAIR IL-MONROE IL-ST. LOUIS MO-JEFFERSON MO-
138 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR NORTHWESTERN ST. CLAIR...NORTHWESTERN MONROE...SOUTHWESTERN ST.
LOUIS AND NORTHEASTERN JEFFERSON COUNTIES...

AT 138 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER ARNOLD...MOVING
EAST AT 35 MPH.

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

SOURCE...TRAINED WEATHER SPOTTERS. MULTIPLE REPORTS OF HAIL TO THE
         SIZE OF GOLFBALLS NEAR ARNOLD.

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...
BELLEVILLE...WILDWOOD...KIRKWOOD...EAST ST. LOUIS...ARNOLD...CAHOKIA...
CRESTWOOD...EUREKA...WATERLOO...COLUMBIA...SUNSET HILLS...VALLEY PARK...
PEVELY...CENTREVILLE...DUPO...FENTON...MILLSTADT...HERCULANEUM...BYRNES
MILL AND LAKESHIRE.

THIS ALSO INCLUDES  ROUTE 66 STATE PARK...MASTODON HISTORIC SITE...
SANDY CREEK COVERED BRIDGE HISTORIC SITE...AND GOV. DUNKLIN'S GRAVE
HISTORIC SITE.
 
THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 44 IN MISSOURI BETWEEN EXITS 264 AND 276.
 INTERSTATE 55 IN MISSOURI BETWEEN EXITS 180 AND 191.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3827 9059 3853 9065 3857 9030 3855 9027
      3853 9027 3853 9026 3858 9021 3860 9006
      3829 9006
TIME...MOT...LOC 1838Z 257DEG 29KT 3842 9036 

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

GLASS

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, 1:51 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, 3:15 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	45 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.