Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 80, NWS St. Louis, MO

April 19, 2011Madison County, Saint Clair County, Illinois; Saint Charles County, Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 19, 2011, 6:26 AM CDT for Madison County, Saint Clair County, Illinois; Saint Charles County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 49 min. 28 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
Apr 19, 2011, 6:26 AM CDT (11:26 UTC)
Expired
Apr 19, 2011, 7:15 AM CDT
In force
49 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 44 km from the middle of the area, began a volume at 11:26 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

TimeReportWhereRemark
Apr 19, 6:31 AM CDTHAIL 0.7Maryland Heights, MO
Apr 19, 6:35 AM CDTHAIL 0.25Overland, MOPEA SIZED AND SLIGHTLY BIGGER HAIL
Apr 19, 6:39 AM CDTHAIL 1Overland, MO2 REPORTS OF 1 INCH HAIL FROM THIS AREA
Apr 19, 6:42 AM CDTHAIL 0.75St. Louis, MO
Apr 19, 6:43 AM CDTHAIL 0.25Florissant, MO
Apr 19, 6:43 AM CDTHAIL 11 Wnw Jennings, MO
Apr 19, 6:44 AM CDTHAIL 0.7Ferguson, MO
Apr 19, 6:44 AM CDTHAIL 1.5Overland, MO
Apr 19, 6:46 AM CDTHAIL 1.75Ferguson, MO
Apr 19, 6:48 AM CDTHAIL 1Granite City, IL
Apr 19, 6:50 AM CDTHAIL 1Granite City, IL
Apr 19, 6:50 AM CDTHAIL 1Spanish Lake, MO
Apr 19, 6:52 AM CDTHAIL 1.75Granite City, IL
Apr 19, 6:53 AM CDTHAIL 1.75Granite City, IL
Apr 19, 6:54 AM CDTHAIL 0.7Granite City, IL
Apr 19, 6:56 AM CDTHAIL 0.88Bridgeton, MOAT INTERSECTION OF INTERSTATE 270 ST. CHARLES ROCK ROAD.
Apr 19, 6:58 AM CDTHAIL 13 W Florissant, MOA FEW STONES UP TO 1.00 INCH DIAMETER....MOSTLY PEA SIZE.
Apr 19, 6:58 AM CDTHAIL 1.753 W Florissant, MOLARGEST HAILSTONE WAS 1.75 INCHES. PEA SIZE HAIL ALSO OCCURRED.
Apr 19, 7:00 AM CDTHAIL 0.7Edwardsville, IL
Apr 19, 7:04 AM CDTHAIL 0.7Belleville, ILON EAST SIDE OF TOWN.
Apr 19, 7:05 AM CDTHAIL 1.5Granite City, IL
Apr 19, 7:06 AM CDTTSTM WND DMGSpanish Lake, MOROOFING DAMAGE TO A CHURCH REPORTED BY LOCAL TV STATIONS. TIME ESTIMATED FROM RADAR.
Apr 19, 7:09 AM CDTHAIL 1.5Granite City, IL
Apr 19, 7:14 AM CDTHAIL 1Edwardsville, ILON CAMPUS OF SIU-EDWARDSVILLE.
Apr 19, 7:15 AM CDTHAIL 0.25Belleville, ILAT GREENMOUNT RD AND HIGHWAY 161.
Apr 19, 7:15 AM CDTHAIL 0.88Granite City, ILPENNY TO NICKEL.
Apr 19, 7:17 AM CDTHAIL 0.25Scott Afb, IL
Apr 19, 7:18 AM CDTHAIL 0.51 E Belleville, 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.

IssuedProductOfficeLasted
Apr 19, 3:11 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 11.4 hours before the alert went out and 223 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2011-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2011-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 194 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1035 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
194 m²/s²
0-3 km storm-relative helicity
347 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

843 
WUUS53 KLSX 191126
SVRLSX
ILC119-163-MOC183-189-510-191215-
/O.NEW.KLSX.SV.W.0080.110419T1126Z-110419T1215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
626 AM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
  NORTHWESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS... 
  EASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  EASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
  ST. LOUIS CITY IN EAST CENTRAL MISSOURI...

* UNTIL 715 AM CDT

* AT 622 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR TOWN AND COUNTRY...AND MOVING EAST AT 40
  MPH.  AT 621 AM CDT...EMERGENCY MANAGEMENT REPORTED QUARTER SIZE 
  IN CHESTERFIELD

* LOCATIONS IMPACTED INCLUDE...
  CREVE COEUR...SUNSET HILLS...KIRKWOOD...FRONTENAC...BRIDGETON...
  WARSON WOODS...CRESTWOOD...OAKLAND...GLENDALE...LADUE...ST. ANN...
  OLIVETTE...WEBSTER GROVES...OVERLAND...BRENTWOOD...LAKESHIRE...
  WOODSON TERRACE...AFFTON...HAZELWOOD AND ST. JOHN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3850 8984 3846 9020 3852 9027 3846 9029
      3850 9041 3854 9057 3878 9057 3889 8984
TIME...MOT...LOC 1125Z 264DEG 37KT 3864 9045
WIND...HAIL <50MPH 1.00IN

$$

BRITT
2 follow-up statements
766 
WWUS53 KLSX 191138
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
638 AM CDT TUE APR 19 2011

MOC183-191147-
/O.CAN.KLSX.SV.W.0080.000000T0000Z-110419T1215Z/
ST. CHARLES MO-
638 AM CDT TUE APR 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ST. CHARLES
COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.  STRONG THUNDERSTORMS ARE STILL POSSIBLE...AS A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM CDT.

LAT...LON 3846 9019 3852 9027 3846 9029 3851 9045
      3880 9044 3883 9021 3882 9020 3883 9015
      3880 9012 3883 9011 3885 9013 3889 8984
      3850 8984
TIME...MOT...LOC 1137Z 264DEG 37KT 3864 9028

$$

ILC119-163-MOC189-510-191215-
/O.CON.KLSX.SV.W.0080.000000T0000Z-110419T1215Z/
ST. CLAIR IL-MADISON IL-ST. LOUIS CITY MO-ST. LOUIS MO-
638 AM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN ST.
LOUIS...ST. LOUIS CITY...SOUTHWESTERN MADISON AND NORTHWESTERN ST.
CLAIR COUNTIES UNTIL 715 AM CDT...

AT 631 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR LADUE...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  DELLWOOD...JENNINGS...ST. LOUIS...BLACK JACK...DUPO...BELLEFONTAINE
  NEIGHBORS...RIVERVIEW...SPANISH LAKE...CAHOKIA...VENICE...
  MADISON...EAST ST. LOUIS...GRANITE CITY...CENTREVILLE...WASHINGTON
  PARK...PONTOON BEACH...CASEYVILLE...BELLEVILLE...FAIRVIEW HEIGHTS
  AND SWANSEA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3846 9019 3852 9027 3846 9029 3851 9045
      3880 9044 3883 9021 3882 9020 3883 9015
      3880 9012 3883 9011 3885 9013 3889 8984
      3850 8984
TIME...MOT...LOC 1137Z 264DEG 37KT 3864 9028
WIND...HAIL <50MPH 1.00IN

$$

BRITT
322 
WWUS53 KLSX 191151
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
651 AM CDT TUE APR 19 2011

ILC119-163-MOC189-510-191215-
/O.CON.KLSX.SV.W.0080.000000T0000Z-110419T1215Z/
ST. CLAIR IL-MADISON IL-ST. LOUIS CITY MO-ST. LOUIS MO-
651 AM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
ST. LOUIS...ST. LOUIS CITY...SOUTHWESTERN MADISON AND NORTHWESTERN
ST. CLAIR COUNTIES UNTIL 715 AM CDT...

AT 646 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  GOLF 
BALL SIZE HAIL HAS BEEN REPORTED WITH THIS STORM IN FERGUSON. THIS 
STORM WAS LOCATED NEAR GRANITE CITY...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  PONTOON BEACH...CASEYVILLE...BELLEVILLE...FAIRVIEW HEIGHTS...
  SWANSEA...COLLINSVILLE...GLEN CARBON...MARYVILLE...EDWARDSVILLE...
  O'FALLON...SHILOH...TROY...SCOTT AFB...HARTFORD...ROXANA...
  MITCHELL...POAG...KUHN...FRUIT AND HAMEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3846 9019 3852 9027 3871 9044 3880 9044
      3883 9021 3882 9020 3883 9015 3880 9012
      3883 9011 3885 9013 3889 8984 3850 8984
TIME...MOT...LOC 1150Z 263DEG 41KT 3873 9011
WIND...HAIL <50MPH 1.75IN

$$

BRITT

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 4:35 AM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Pike40 min
Apr 19, 5:14 AM CDTSevere Thunderstorm WarningLSXGreene, Pike31 min
Apr 19, 6:21 AM CDTAreal Flood AdvisoryLSXMadison, Monroe, Saint Clair3 hr
Apr 19, 6:22 AM CDTSevere Thunderstorm WarningLSXMonroe, Randolph, Saint Clair38 min
Apr 19, 6:56 AM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair49 min
Apr 19, 7:08 AM CDTSevere Thunderstorm WarningLSXJersey, Macoupin, Madison, Montgomery37 min
Apr 19, 7:36 AM CDTSevere Thunderstorm WarningLSXBond, Macoupin, Madison, Montgomery39 min
Apr 19, 8:07 AM CDTSevere Thunderstorm WarningLSXBond, Fayette, Montgomery38 min
Apr 19, 8:25 AM CDTSevere Thunderstorm WarningLSXFayette, Marion29 min
Apr 19, 8:41 AM CDTSevere Thunderstorm WarningLSXFayette34 min
Apr 19, 11:18 AM CDTRiver Flood WarningLSXCalhoun, Greene, Jersey85 days
Apr 19, 3:46 PM CDTSevere Thunderstorm WarningLSXPike44 min
Apr 19, 3:59 PM CDTTornado WarningLSXPike46 min
Apr 19, 4:18 PM CDTTornado WarningLSXCalhoun, Greene, Pike42 min
Apr 19, 4:31 PM CDTTornado WarningLSXCalhoun44 min
Apr 19, 4:41 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Jersey, Macoupin, Madison49 min
Apr 19, 4:59 PM CDTTornado WarningLSXGreene, Pike46 min
Apr 19, 5:28 PM CDTSevere Thunderstorm WarningLSXGreene, Jersey, Macoupin47 min
Apr 19, 5:28 PM CDTSevere Thunderstorm WarningLSXCalhoun47 min
Apr 19, 5:36 PM CDTTornado WarningLSXMacoupin39 min
Apr 19, 5:42 PM CDTSevere Thunderstorm WarningLSXGreene34 min
Apr 19, 5:44 PM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey34 min
Apr 19, 6:01 PM CDTTornado WarningLSXMontgomery44 min
Apr 19, 6:05 PM CDTTornado WarningLSXMacoupin, Montgomery40 min
Apr 19, 6:12 PM CDTSevere Thunderstorm WarningLSXCalhoun48 min
Apr 19, 6:14 PM CDTSevere Thunderstorm WarningLSXJersey, Macoupin, Madison61 min
Apr 19, 6:31 PM CDTTornado WarningLSXMontgomery27 min
Apr 19, 6:56 PM CDTSevere Thunderstorm WarningLSXBond, Macoupin, Madison, Montgomery64 min
Apr 19, 2:51 AM CDTSevere Thunderstorm WarningLSXCole, Moniteau, Osage39 min
Apr 19, 3:19 AM CDTSevere Thunderstorm WarningLSXBoone, Callaway, Cole, Moniteau, Osage41 min
Apr 19, 3:26 AM CDTSevere Thunderstorm WarningLSXCallaway, Gasconade, Osage49 min
Apr 19, 3:39 AM CDTSevere Thunderstorm WarningLSXMoniteau21 min
Apr 19, 3:57 AM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 4 more48 min
Apr 19, 4:43 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Montgomery, Warren47 min
Apr 19, 4:58 AM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade, Washington32 min
Apr 19, 5:23 AM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Saint Charles, Warren, Washington37 min
Apr 19, 5:43 AM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis, Washington47 min
Apr 19, 8:05 AM CDTRiver Flood WarningLSXSaint Charles30 hr
Apr 19, 11:06 AM CDTRiver Flood WarningLSXLincoln19 days
Apr 19, 11:33 AM CDTRiver Flood WarningLSXJefferson, Saint Louis30 days
Apr 19, 3:48 PM CDTSevere Thunderstorm WarningLSXAudrain, Montgomery, Pike42 min
Apr 19, 3:54 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway, Cole, Osage51 min
Apr 19, 4:24 PM CDTSevere Thunderstorm WarningLSXCole, Franklin, Gasconade, Osage51 min
Apr 19, 4:31 PM CDTSevere Thunderstorm WarningLSXCallaway, Montgomery, Warren44 min
Apr 19, 5:01 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Saint Charles, Warren44 min
Apr 19, 5:13 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Montgomery, Saint Charles, Warren47 min
Apr 19, 5:56 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Warren34 min
Apr 19, 5:58 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade32 min
Apr 19, 6:14 PM CDTSevere Thunderstorm WarningLSXFranklin, Warren31 min
Apr 19, 6:15 PM CDTSevere Thunderstorm WarningLSXReynolds60 min
Apr 19, 6:30 PM CDTFlash Flood WarningLSXSaint Charles3 hr
Apr 19, 6:37 PM CDTSevere Thunderstorm WarningLSXIron, Madison, Reynolds, Saint Francois, Washington53 min
Apr 19, 6:45 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles30 min
Apr 19, 6:51 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds39 min
Apr 19, 6:56 PM CDTAreal Flood AdvisoryLSXFranklin, Warren5 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2011Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning in 2011

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.