Alert archive / Missouri / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 66, NWS St. Louis, MO

May 11, 20164 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2016, 12:26 PM CDT for 4 counties in Missouri. It was in force for 49 min. 30 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, 12:26 PM CDT (17:26 UTC)
Expired: May 11, 2016, 1:15 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Franklin County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 15 km from the middle of the area, began a volume at 17:27 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, 12:28 PM CDT	HAIL 0.5	2 N Marthasville, MO
May 11, 12:37 PM CDT	HAIL 1	Dutzow, MO
May 11, 12:50 PM CDT	HAIL 1	O'Fallon, MO	FLAT 1 INCH HAIL
May 11, 12:54 PM CDT	HAIL 1	O'Fallon, MO
May 11, 12:56 PM CDT	HAIL 1	Dardenne Prairie, MO
May 11, 12:57 PM CDT	HAIL 2.75	1 Wnw Cottleville, MO
May 11, 12:57 PM CDT	HAIL 4	1 Wnw Cottleville, MO	MEASURED HAIL STONE...4 INCHES IN DIAMETER.
May 11, 12:59 PM CDT	HAIL 1.75	Weldon Spring, MO	FROM TROOP C AT HIGHWAY 94 AND I-64.
May 11, 1:01 PM CDT	HAIL 2.5	O'Fallon, MO
May 11, 1:01 PM CDT	HAIL 2.75	2 W Weldon Spring, MO	120 OF 150 CARS AT DEALERSHIP SUSTAINED BUSTED WINDOWS AND LOTS OF DENTS FROM LARGE HAIL...SOME UP TO BASEBALL SIZE.
May 11, 1:02 PM CDT	HAIL 1.75	2 Nnw Cottleville, MO	OAK HOLLOW DRIVE NEAR BIRDIE HILLS ROAD.
May 11, 1:02 PM CDT	HAIL 1.75	Cottleville, MO
May 11, 1:02 PM CDT	HAIL 3	2 Wnw Weldon Spring, MO	ON OFALLON ROAD NEAR FRANCIS HOWELL MIDDLE SCHOOL.
May 11, 1:03 PM CDT	HAIL 2.75	Weldon Spring, MO
May 11, 1:03 PM CDT	HAIL 3.5	Weldon Spring, MO	MEASURED HAIL STONE...3.5 INCHES IN DIAMETER.
May 11, 1:04 PM CDT	HAIL 1.5	2 Sw Cottleville, MO
May 11, 1:04 PM CDT	HAIL 2	2 Sw Cottleville, MO
May 11, 1:04 PM CDT	HAIL 2.5	St. Peters, MO
May 11, 1:06 PM CDT	HAIL 0.88	St. Peters, MO
May 11, 1:06 PM CDT	HAIL 2	St. Peters, MO	NEAR INTERSECTION OF SPENCER AND WILLOT.
May 11, 1:08 PM CDT	HAIL 2	Cottleville, MO
May 11, 1:08 PM CDT	HAIL 2	St. Peters, MO	KISKER RD AT 94
May 11, 1:09 PM CDT	HAIL 1	St. Charles, MO	I-70 AND ZUMBEHL
May 11, 1:10 PM CDT	HAIL 2	Harvester, MO
May 11, 1:13 PM CDT	HAIL 1	2 W St. Charles, MO	NEAR EXIT 225 ON I-70.
May 11, 1:13 PM CDT	HAIL 1.75	St. Charles, MO	HIGHWAY 370 ADN ELM ST.
May 11, 1:14 PM CDT	HAIL 1.75	St. Peters, MO	HWY 94 AT HWY 364
May 11, 1:20 PM CDT	HAIL 1.25	Chesterfield, MO
May 11, 1:20 PM CDT	HAIL 3	3 Sw St. Charles, MO	AT THE ST. PETERS LINE WITH ST. CHARLES
May 11, 1:25 PM CDT	HAIL 1.75	Maryland Heights, MO

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, 5.4 hours before the alert went out and 255 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.

300 
WUUS53 KLSX 111726
SVRLSX
MOC071-183-189-219-111815-
/O.NEW.KLSX.SV.W.0066.160511T1726Z-160511T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1226 PM CDT WED MAY 11 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
  ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  NORTHEASTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHEASTERN WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 115 PM CDT

* AT 1222 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
  MARTHASVILLE...MOVING EAST AT 50 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...
  O'FALLON...ST. CHARLES...ST. PETERS...FLORISSANT...CHESTERFIELD...
  WILDWOOD...UNIVERSITY CITY...BALLWIN...WENTZVILLE...KIRKWOOD...MARYLAND
  HEIGHTS...HAZELWOOD...WEBSTER GROVES...MANCHESTER...CREVE COEUR...
  OVERLAND...CLAYTON...LAKE ST. LOUIS...WASHINGTON AND ST. ANN.

THIS INCLUDES INTERSTATE 70 IN MISSOURI BETWEEN EXITS 209 AND 231.
 
THIS ALSO INCLUDES  BABLER MEMORIAL STATE PARK...CASTLEWOOD STATE
PARK...AND FIRST MISSOURI STATE CAPITOL HISTORIC SITE.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3847 9114 3874 9120 3892 9034 3857 9033
TIME...MOT...LOC 1722Z 256DEG 43KT 3865 9106 

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

GLASS

4 follow-up statements

656 
WWUS53 KLSX 111738
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1238 PM CDT WED MAY 11 2016

MOC071-183-189-219-111815-
/O.CON.KLSX.SV.W.0066.000000T0000Z-160511T1815Z/
ST. LOUIS MO-ST. CHARLES MO-FRANKLIN MO-WARREN MO-
1238 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM CDT
FOR NORTHWESTERN ST. LOUIS...ST. CHARLES...NORTHEASTERN FRANKLIN AND
SOUTHEASTERN WARREN COUNTIES...

AT 1237 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER DUTZOW...MOVING
EAST AT 30 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...TRAINED WEATHER SPOTTERS REPORTED QUARTER SIZE HAIL IN
         DUTZOW.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
O'FALLON...ST. CHARLES...ST. PETERS...FLORISSANT...CHESTERFIELD...
WILDWOOD...UNIVERSITY CITY...BALLWIN...WENTZVILLE...KIRKWOOD...MARYLAND
HEIGHTS...HAZELWOOD...WEBSTER GROVES...MANCHESTER...CREVE COEUR...
OVERLAND...CLAYTON...LAKE ST. LOUIS...WASHINGTON AND ST. ANN.

THIS ALSO INCLUDES  BABLER MEMORIAL STATE PARK...CASTLEWOOD STATE
PARK...AND FIRST MISSOURI STATE CAPITOL HISTORIC SITE.
 
THIS INCLUDES INTERSTATE 70 IN MISSOURI BETWEEN EXITS 209 AND 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3848 9110 3876 9109 3892 9034 3857 9033
TIME...MOT...LOC 1737Z 265DEG 26KT 3863 9096 

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

GLASS

518 
WWUS53 KLSX 111752
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1252 PM CDT WED MAY 11 2016

MOC071-183-189-219-111815-
/O.CON.KLSX.SV.W.0066.000000T0000Z-160511T1815Z/
ST. LOUIS MO-ST. CHARLES MO-FRANKLIN MO-WARREN MO-
1252 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM CDT
FOR NORTHWESTERN ST. LOUIS...ST. CHARLES...NORTHEASTERN FRANKLIN AND
SOUTHEASTERN WARREN COUNTIES...

AT 1251 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DEFIANCE...
MOVING EAST AT 40 MPH. A SECOND SEVERE THUNDERSTORM WAS LOCATED NEAR
O'FALLON...MOVING EAST AT 30 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...TRAINED WEATHER SPOTTERS REPORTED QUARTER SIZE HAIL IN
         O'FALLON.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
O'FALLON...ST. CHARLES...ST. PETERS...FLORISSANT...CHESTERFIELD...
WILDWOOD...UNIVERSITY CITY...BALLWIN...WENTZVILLE...KIRKWOOD...MARYLAND
HEIGHTS...HAZELWOOD...WEBSTER GROVES...MANCHESTER...CREVE COEUR...
OVERLAND...CLAYTON...LAKE ST. LOUIS...WASHINGTON AND ST. ANN.

THIS ALSO INCLUDES  BABLER MEMORIAL STATE PARK...CASTLEWOOD STATE
PARK...AND FIRST MISSOURI STATE CAPITOL HISTORIC SITE.
 
THIS INCLUDES INTERSTATE 70 IN MISSOURI BETWEEN EXITS 209 AND 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3848 9110 3876 9109 3892 9034 3857 9033
TIME...MOT...LOC 1751Z 256DEG 36KT 3867 9082 

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

GLASS

517 
WWUS53 KLSX 111758
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1258 PM CDT WED MAY 11 2016

MOC219-111807-
/O.CAN.KLSX.SV.W.0066.000000T0000Z-160511T1815Z/
WARREN MO-
1258 PM CDT WED MAY 11 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WARREN COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHWESTERN ILLINOIS...AND EAST CENTRAL MISSOURI.

LAT...LON 3850 9096 3879 9096 3892 9034 3857 9033
TIME...MOT...LOC 1757Z 264DEG 17KT 3868 9079 

$$

MOC071-183-189-111815-
/O.CON.KLSX.SV.W.0066.000000T0000Z-160511T1815Z/
ST. LOUIS MO-ST. CHARLES MO-FRANKLIN MO-
1258 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM CDT
FOR CENTRAL ST. LOUIS...ST. CHARLES AND EAST CENTRAL FRANKLIN
COUNTIES...

AT 1257 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER DEFIANCE...
MOVING EAST AT 20 MPH. ANOTHER SEVERE THUNDERSTORM WAS LOCATED NEAR
DARDENNE PRAIRIE MOVING EAST AT 20 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...TRAINED WEATHER SPOTTERS. MULTIPLE REPORTS OF QUARTER SIZE
         HAIL.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
O'FALLON...ST. CHARLES...ST. PETERS...FLORISSANT...CHESTERFIELD...
WILDWOOD...UNIVERSITY CITY...BALLWIN...WENTZVILLE...KIRKWOOD...MARYLAND
HEIGHTS...HAZELWOOD...WEBSTER GROVES...MANCHESTER...CREVE COEUR...
OVERLAND...CLAYTON...LAKE ST. LOUIS...ST. ANN AND CRESTWOOD.

THIS ALSO INCLUDES  BABLER MEMORIAL STATE PARK...CASTLEWOOD STATE
PARK...AND FIRST MISSOURI STATE CAPITOL HISTORIC SITE.
 
THIS INCLUDES INTERSTATE 70 IN MISSOURI BETWEEN EXITS 209 AND 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3850 9096 3879 9096 3892 9034 3857 9033
TIME...MOT...LOC 1757Z 264DEG 17KT 3868 9079 

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

GLASS

581 
WWUS53 KLSX 111800
SVSLSX

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

MOC071-183-189-111815-
/O.CON.KLSX.SV.W.0066.000000T0000Z-160511T1815Z/
ST. LOUIS MO-ST. CHARLES MO-FRANKLIN MO-
100 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM CDT
FOR CENTRAL ST. LOUIS...ST. CHARLES AND EAST CENTRAL FRANKLIN
COUNTIES...

AT 100 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
COTTLEVILLE... MOVING EAST AT 25 MPH. ANOTHER SEVERE STORM WAS
LOCATED NEAR DEFIANCE MOVING EAST AT 20 MPH.

THIS IS A VERY DANGEROUS STORM.

HAZARD...BASEBALL SIZE HAIL AND 60 MPH WIND GUSTS. 

SOURCE...TRAINED WEATHER SPOTTERS. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE SEVERELY INJURED. 
         EXPECT SHATTERED WINDOWS...EXTENSIVE DAMAGE TO ROOFS...
         SIDING...AND VEHICLES. 

LOCATIONS IMPACTED INCLUDE...
O'FALLON...ST. CHARLES...ST. PETERS...FLORISSANT...CHESTERFIELD...
WILDWOOD...UNIVERSITY CITY...BALLWIN...WENTZVILLE...KIRKWOOD...MARYLAND
HEIGHTS...HAZELWOOD...WEBSTER GROVES...MANCHESTER...CREVE COEUR...
OVERLAND...CLAYTON...LAKE ST. LOUIS...ST. ANN AND CRESTWOOD.

THIS ALSO INCLUDES  BABLER MEMORIAL STATE PARK...CASTLEWOOD STATE
PARK...AND FIRST MISSOURI STATE CAPITOL HISTORIC SITE.
 
THIS INCLUDES INTERSTATE 70 IN MISSOURI BETWEEN EXITS 209 AND 231.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3850 9096 3879 9096 3892 9034 3857 9033
TIME...MOT...LOC 1800Z 262DEG 24KT 3876 9066 

HAIL...2.75IN
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	Jefferson, Lincoln, Madison, Pike, Saint Charles, Sainte Genevieve and 3 more	6 hr
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, 12:29 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, 1:08 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	52 min
May 11, 1:12 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	48 min
May 11, 1:51 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	54 min
May 11, 1:55 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis	65 min
May 11, 2:12 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve	63 min
May 11, 3:11 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	49 min
May 11, 3:15 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	45 min
May 11, 3:52 PM CDT	Flash Flood Warning	LSX	Jefferson, Sainte Genevieve	4 hr
May 11, 3:57 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve	63 min
May 11, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois, Washington	40 min
May 11, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	60 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, 5:26 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois	4 hr
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
May 11, 6:50 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike, Saint Charles, Warren	40 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.