Alert archive / Illinois / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 22, NWS St. Louis, MO

April 26, 2016Madison County, Saint Clair County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 26, 2016, 2:27 PM CDT for Madison County, Saint Clair County, Illinois. It was in force for 48 min. 3 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 26, 2016, 2:27 PM CDT (19:27 UTC)
Expired
Apr 26, 2016, 3:15 PM CDT
In force
48 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Madison County, IL, Saint Clair County, IL

The radar

The St Louis radar (KLSX), 64 km from the middle of the area, began a volume at 19:30 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 26, 2:50 PM CDTTSTM WND GST 47Scott Afb, IL
Apr 26, 3:00 PM CDTTSTM WND DMG3 W New Baden, ILEARLIER LOCAL STORM REPORT OF MULTIPLE CARS BLOWN OFF I-64 NEAR MILE POST 27 WAS ERRONEOUS.
Apr 26, 3:00 PM CDTTSTM WND DMG3 W New Baden, ILMULTIPLE CARS INCLUDING A SEMI BLOWN OVER ON I-64 NEAR MILE MARKER 27.

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 26, 11:52 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.5 hours before the alert went out and 205 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 12:00Z on 2016-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 449 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2016-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
449 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
792 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

450 
WUUS53 KLSX 261927
SVRLSX
ILC119-163-262015-
/O.NEW.KLSX.SV.W.0022.160426T1927Z-160426T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
227 PM CDT TUE APR 26 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
  SOUTHWESTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS...

* UNTIL 315 PM CDT

* AT 226 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR ORCHARD FARMS TO BROOKLYN TO NEAR COLUMBIA...
  MOVING EAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...TRAINED WEATHER SPOTTERS. A 60 MPH WIND GUST WAS REPORTED
           AT LAMBERT AIRPORT.

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  BELLEVILLE...GRANITE CITY...O'FALLON...EAST ST. LOUIS...COLLINSVILLE...
  EDWARDSVILLE...FAIRVIEW HEIGHTS...SWANSEA...GLEN CARBON...SHILOH...WOOD
  RIVER...TROY...MARYVILLE...MASCOUTAH...PONTOON BEACH...CENTREVILLE...
  LEBANON...FREEBURG...CASEYVILLE AND WASHINGTON PARK.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 70 IN ILLINOIS NEAR EXIT 21.
 INTERSTATE 55 IN ILLINOIS NEAR EXIT 23.
 INTERSTATE 64 IN ILLINOIS BETWEEN EXITS 9 AND 23.

THIS ALSO INCLUDES  HORSESHOE LAKE STATE PARK.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3835 8974 3846 9011 3863 9010 3879 9013
      3881 9012 3885 9011 3886 8981 3861 8973
TIME...MOT...LOC 1926Z 277DEG 34KT 3884 9043 3864 9019 3842 9024 

HAIL...<.75IN
WIND...60MPH
 
$$

KANOFSKY
1 follow-up statement
291 
WWUS53 KLSX 262010
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
310 PM CDT TUE APR 26 2016

ILC119-163-262020-
/O.EXP.KLSX.SV.W.0022.000000T0000Z-160426T2015Z/
ST. CLAIR IL-MADISON IL-
310 PM CDT TUE APR 26 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. CLAIR AND
SOUTHWESTERN MADISON COUNTIES IN SOUTHWESTERN ILLINOIS WILL EXPIRE AT
315 PM CDT...
    
THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

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

LAT...LON 3835 8974 3846 9011 3863 9010 3879 9013
      3881 9012 3885 9011 3886 8981 3861 8973
TIME...MOT...LOC 2009Z 277DEG 34KT 3884 9043 3864 9019 3842 9024 

$$

KANOFSKY

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 2:00 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair45 min
Apr 26, 3:01 PM CDTSevere Thunderstorm WarningLSXClinton, Madison, Saint Clair, Washington31 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2016Every 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.