Alert archive / Illinois / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 165, NWS St. Louis, MO

June 28, 20184 counties in Missouri; 10 counties in Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 28, 2018, 5:22 PM CDT for 4 counties in Missouri; 10 counties in Illinois. It was in force for 83 min. 46 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
Jun 28, 2018, 5:22 PM CDT (22:22 UTC)
Expired
Jun 28, 2018, 6:45 PM CDT
In force
83 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Bond County, IL, Clinton County, IL, Fayette County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Saint Clair County, IL, Washington County, IL, City of Saint Louis, MO, Jefferson County, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 96 km from the middle of the area, began a volume at 22:25 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
Jun 28, 5:28 PM CDTTSTM WND DMG3 Nne Saint Louis, MOHIGH VOLTAGE POWER LINES DOWN; POLE TO POLE. TIME ESTIMATED BY RADAR.
Jun 28, 5:28 PM CDTTSTM WND GST 501 Nne Woodson Terrace, MO
Jun 28, 5:33 PM CDTTSTM WND DMG1 Ene Riverview, MOLARGE TREE FELL ONTO HOUSE BREAKING THROUGH HALF OF THE HOUSE AND DESTROYING THE ENTIRE ROOM.
Jun 28, 5:38 PM CDTTSTM WND DMG1 Ese Riverview, MOLARGE TREE BRANCHES ON POWER LINES AND BLOCKING RIVERVIEW DRIVE NEAR CHAMBERS ROAD.
Jun 28, 5:41 PM CDTTSTM WND DMG1 Ene Edwardsville, ILDELAYED REPORT VIA SOCIAL MEDIA: PUBLIC STATED THAT SEVERAL LARGE AND HEALTHY TREES WERE DOWN THROUGHOUT PARTS OF EDWARDSVILLE. A COUPLE OF TREES WERE ON POWER LINES.
Jun 28, 5:41 PM CDTTSTM WND DMG2 Nnw Saint Louis, MOLARGE TREE UPROOTED BLOCKING FOUNTAIN AVENUE.
Jun 28, 5:41 PM CDTTSTM WND DMG2 W Saint Louis, MODELAYED REPORT: LARGE TREE DOWN NEAR THE ROUND ABOUT HEADING INTO FORREST PARK NEAR THE ZOO OFF 64/40.
Jun 28, 5:41 PM CDTTSTM WND DMGWorden, ILPICTURE OF TWO TREES UPROOTED RECEIVED VIA TWITTER POST.
Jun 28, 5:42 PM CDTTSTM WND DMG3 Ese Saint Louis, MOLIGHT POLE SNAPPED NEAR BASE. TIME ESTIMATED FROM RADAR. TWITTER REPORT.
Jun 28, 5:44 PM CDTTSTM WND DMG1 Sw Granite City, ILMEDIA REPORT VIA SOCIAL MEDIA OF TREE DOWN IN GRANITE CITY.
Jun 28, 5:44 PM CDTTSTM WND DMG1 Wsw Granite City, ILMEDIA REPORT VIA SOCIAL MEDIA OF LARGE TREES UPROOTED. TIME ESTIMATED FROM RADAR.
Jun 28, 5:45 PM CDTTSTM WND DMGGlen Carbon, ILSMALL TREE SNAPPED. FACEBOOK REPORT.
Jun 28, 5:46 PM CDTTSTM WND DMG2 Se Madison, IL500 FT RADIO BROADCAST TOWER KNOCKED DOWN.
Jun 28, 5:46 PM CDTTSTM WND DMGFairmont City, ILDELAYED REPORT: SEVERAL LIMBS DOWN, SOME SNAPPED AT THE MIDPOINT OF THE TREES. MANY SMALLER TREE LIMBS AND DEBRIS SCATTERED ABOUT THE GROUND.
Jun 28, 5:49 PM CDTTSTM WND DMG2 W Collinsville, ILTRACTOR TRAILER BLOWN OVER AT THE INTERSECTION OF I-55 AND 203 VIA SOCIAL MEDIA POST. TIME ESTIMATED BY RADAR.
Jun 28, 5:49 PM CDTTSTM WND DMGGranite City, ILSEVERAL LARGE TREES DOWN IN WILSON PARK.
Jun 28, 5:54 PM CDTTSTM WND DMG2 Nne Saint Louis, MOMEDIA REPORT VIA SOCIAL MEDIA. TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
Jun 28, 5:55 PM CDTTSTM WND DMGHighland, ILSEVERAL WOODEN FENCES DOWN. POWER OUTAGES ALSO REPORTED.
Jun 28, 5:56 PM CDTTSTM WND DMG2 Nnw Saint Louis, MOLARGE HEALTHY TREES TOPPLED.
Jun 28, 5:57 PM CDTTSTM WND DMGOakland, MOREPORT VIA SOCIAL MEDIA OF TREE DOWN. TIME ESTIMATED FROM RADAR.
Jun 28, 5:58 PM CDTFUNNEL CLOUDCaseyville, ILFUNNEL CLOUD SPOTTED AT THE INTERSECTION OF BETHEL MINE ROAD AND NORTH ILLINOIS STREET IN CASEYVILLE.
Jun 28, 5:58 PM CDTTSTM WND DMG1 Se Fairview Heights, ILDELAYED REPORT: LARGE HEALTHY TREE SNAPPED AT THE BASE NEAR THE INTERSECTION OF S RUBY LANE AND ST. CLAIR DRIVE. PHOTO SUBMITTED VIA SOCIAL MEDIA.
Jun 28, 6:00 PM CDTTSTM WND DMGBrownstown, ILTREE DOWNED ON CAR. ADDITIONAL REPORTS OF TREES AND POWER LINES DOWN SPORADICALLY ACROSS THE COUNTY.
Jun 28, 6:00 PM CDTTSTM WND GST 501 Se Sauget, IL
Jun 28, 6:02 PM CDTTSTM WND DMG1 Ese Belleville, ILREPORT VIA SOCIAL MEDIA OF TREE UPROOTED. TIME ESTIMATED FROM RADAR.
Jun 28, 6:02 PM CDTTSTM WND DMG2 Se Swansea, ILDELAYED REPORT: FEW LIMBS DOWN AT THE 1700 BLOCK OF LASALLE.
Jun 28, 6:02 PM CDTTSTM WND DMGFairview Heights, ILSEVERAL TREES DOWN.
Jun 28, 6:02 PM CDTTSTM WND DMGGreenville, ILTREE DOWN ACROSS POWER LINE.
Jun 28, 6:02 PM CDTTSTM WND DMGSaint Jacob, ILTREE DOWN AT DOUGLAS AND THIRD STREET. TIME ESTIMATED BY RADAR.
Jun 28, 6:03 PM CDTFUNNEL CLOUD1 N Millstadt, ILSPOTTER SAW FUNNEL FROM THE CITY OF COLUMBIA, IL.
Jun 28, 6:03 PM CDTTSTM WND DMG2 Ese Fairview Heights, ILMINOR DAMAGE TO AN APARTMENT COMPLEX ALONG JOSEPH DRIVE IN FAIRVIEW HEIGHTS. TIME ESTIMATED FROM RADAR.
Jun 28, 6:05 PM CDTTSTM WND DMG1 S Scott Afb, ILDELAYED REPORT: SMALL TREE SNAPPED AT THE BASE. BASED IS JUDGED TO BE 10 TO 12 INCHES IN DIAMETER.
Jun 28, 6:05 PM CDTTSTM WND DMG2 E Centreville, ILPUBLIC REPORT VIA SOCIAL MEDIA OF TREES AND POWER POLES SNAPPED OFF. TIME ESTIMATED FROM RADAR.
Jun 28, 6:07 PM CDTTSTM WND DMG1 Nne Scott Afb, ILLARGE TREES DOWN AND DEBRIS.
Jun 28, 6:07 PM CDTTSTM WND DMGAlbers, ILPOWER POLES DOWN IN TOWN. ESTIMATED BY RADAR.
Jun 28, 6:08 PM CDTTSTM WND DMGAviston, IL6 INCH IN DIAMETER TREE LIMB DOWN AND AT LEAST 50 MPH WIND GUST. CURRENTLY WITHOUT POWER.
Jun 28, 6:10 PM CDTTSTM WND DMGGermantown, ILLARGE TREES DOWN.
Jun 28, 6:15 PM CDTTSTM WND DMGGermantown, ILNUMEROUS TREES BLOWN DOWN. TIME ESTIMATED BY RADAR.
Jun 28, 6:18 PM CDTTSTM WND DMGAviston, ILPART OF THE ROOF OF THE AVISTON FAMILY RESTAURANT IS MISSING.
Jun 28, 6:20 PM CDTTSTM WND DMGSandoval, ILDELAYED REPORT: SOCIAL MEDIA USER SUBMITTED SEVERAL PICTURE OF WIND DAMAGE TO TREES. MULTIPLE LARGE LIMBS WERE DOWN IN THE YARD.
Jun 28, 6:23 PM CDTTSTM WND DMGBartelso, ILTRAINED SPOTTER REPORTED 4 TO 5 INCH DIAMETER TREE LIMBS DOWN.
Jun 28, 6:29 PM CDTTSTM WND GST 441 Sse Tonti, IL
Jun 28, 6:30 PM CDTTSTM WND GST 412 E Centralia, IL
Jun 28, 6:30 PM CDTTSTM WND GST 45Hoyleton, IL
Jun 28, 6:31 PM CDTTSTM WND DMGCentralia, ILNUMEROUS TREES SNAPPED. TIME ESTIMATED FROM RADAR. TWITTER REPORT.
Jun 28, 6:37 PM CDTTSTM WND GST 522 E Centralia, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 39 storm reports to this severe thunderstorm warning; the first came 6 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 28, 1:04 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.4 hours before the alert went out and 183 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 2018-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2018-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.193958Sfc1 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
7 J/kg
Mixed-layer CIN
-572 J/kg
Mixed-layer LCL
1140 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

109 
WUUS53 KLSX 282222
SVRLSX
ILC005-027-051-117-119-121-133-135-163-189-MOC099-183-189-510-282345-
/O.NEW.KLSX.SV.W.0165.180628T2222Z-180628T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
522 PM CDT THU JUN 28 2018

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Bond County in south central Illinois...
  Monroe County in southwestern Illinois...
  Southeastern Macoupin County in southwestern Illinois...
  Southern Montgomery County in south central Illinois...
  St. Clair County in southwestern Illinois...
  Clinton County in south central Illinois...
  Northern Washington County in south central Illinois...
  Madison County in southwestern Illinois...
  Marion County in south central Illinois...
  Fayette County in south central Illinois...
  Southeastern St. Charles County in east central Missouri...
  Northeastern Jefferson County in east central Missouri...
  St. Louis City in east central Missouri...
  Central St. Louis County in east central Missouri...

* Until 645 PM CDT.

* At 521 PM CDT, severe thunderstorms were located along a line
  extending from near Taylorville to Witt to near Carlinville to near
  Orchard Farms, moving southeast at 60 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Trained weather spotters. Numerous trees and power lines 
           have been reported down when this line of storms moved 
           through parts of Missouri and Illinois.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  St. Louis, Chesterfield, Belleville, University City, Ballwin,
  Granite City, O'Fallon, Kirkwood, Maryland Heights, East St. Louis,
  Collinsville, Edwardsville, Webster Groves, Ferguson, Arnold,
  Manchester, Creve Coeur, Fairview Heights, Overland and Clayton.

This includes the following highways...
 Interstate 70 in Illinois between exits 21 and 76.
 Interstate 55 in Illinois between exits 23 and 44.
 Interstate 57 in Illinois between exits 116 and 135.
 Interstate 64 in Illinois between exits 9 and 41.
 Interstate 44 in Missouri between exits 272 and 277.
 Interstate 55 in Missouri between exits 187 and 191.

This also includes  Scott Joplin Historic Site, Mastodon Historic
Site, Ramsey Lake State Park, Carlyle Lake Recreational Area, and
Horseshoe Lake State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3822 8987 3822 9003 3815 9004 3809 9019
      3871 9065 3881 8991 3907 8998 3919 8925
      3922 8925 3922 8881 3891 8881 3891 8869
      3864 8870
TIME...MOT...LOC 2221Z 320DEG 52KT 3959 8931 3926 8936 3929 8993 3891
9043

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

Kanofsky
4 follow-up statements
601 
WWUS53 KLSX 282306
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
606 PM CDT THU JUN 28 2018

ILC117-282315-
/O.CAN.KLSX.SV.W.0165.000000T0000Z-180628T2345Z/
Macoupin IL-
606 PM CDT THU JUN 28 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MACOUPIN COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
south central and southwestern Illinois...and east central Missouri.
A Severe Thunderstorm Watch also remains in effect until 100 AM CDT
for southwestern Illinois.

LAT...LON 3822 8987 3822 9003 3815 9004 3809 9019
      3871 9065 3881 8991 3895 8972 3915 8915
      3922 8881 3891 8881 3891 8869 3864 8870
TIME...MOT...LOC 2305Z 353DEG 31KT 3927 8875 3898 8920 3875 8965 3863
9027

$$

ILC005-027-051-119-121-133-135-163-189-MOC099-183-189-510-282345-
/O.CON.KLSX.SV.W.0165.000000T0000Z-180628T2345Z/
Bond IL-Monroe IL-Montgomery IL-St. Clair IL-Clinton IL-
Washington IL-Madison IL-Marion IL-Fayette IL-St. Charles MO-
Jefferson MO-St. Louis City MO-St. Louis MO-
606 PM CDT THU JUN 28 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR BOND COUNTY IN SOUTH CENTRAL ILLINOIS...MONROE COUNTY IN
SOUTHWESTERN ILLINOIS...SOUTHEASTERN MONTGOMERY COUNTY IN SOUTH
CENTRAL ILLINOIS...ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
CLINTON AND NORTHERN WASHINGTON COUNTIES IN SOUTH CENTRAL ILLINOIS...
SOUTHEASTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS...MARION AND
FAYETTE COUNTIES IN SOUTH CENTRAL ILLINOIS...SOUTHEASTERN ST.
CHARLES...NORTHEASTERN JEFFERSON AND CENTRAL ST. LOUIS COUNTIES IN
EAST CENTRAL MISSOURI AND ST. LOUIS CITY...

At 605 PM CDT, severe thunderstorms were located along a line
extending from 6 miles east of Cowden to near Mulberry Grove to
Highland to St. Louis, moving south at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters. Numerous trees and power lines 
         have been reported down across the area. 

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
St. Louis, Chesterfield, Belleville, University City, Ballwin,
Granite City, O'Fallon, Kirkwood, Maryland Heights, East St. Louis,
Collinsville, Edwardsville, Webster Groves, Ferguson, Arnold,
Manchester, Creve Coeur, Fairview Heights, Overland and Clayton.

This also includes  Scott Joplin Historic Site, Mastodon Historic
Site, Carlyle Lake Recreational Area, and Horseshoe Lake State Park.
 
This includes the following highways...
 Interstate 70 in Illinois between exits 21 and 76.
 Interstate 55 in Illinois near exit 23.
 Interstate 57 in Illinois between exits 116 and 135.
 Interstate 64 in Illinois between exits 9 and 41.
 Interstate 44 in Missouri between exits 272 and 277.
 Interstate 55 in Missouri between exits 187 and 191.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3822 8987 3822 9003 3815 9004 3809 9019
      3871 9065 3881 8991 3895 8972 3915 8915
      3922 8881 3891 8881 3891 8869 3864 8870
TIME...MOT...LOC 2305Z 353DEG 31KT 3927 8875 3898 8920 3875 8965 3863
9027

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

Kanofsky
800 
WWUS53 KLSX 282325
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
625 PM CDT THU JUN 28 2018

ILC135-MOC183-282334-
/O.CAN.KLSX.SV.W.0165.000000T0000Z-180628T2345Z/
Montgomery IL-St. Charles MO-
625 PM CDT THU JUN 28 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTGOMERY AND
SOUTHEASTERN ST. CHARLES COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central and southwestern Illinois...and east central Missouri.
A Severe Thunderstorm Watch also remains in effect until 100 AM CDT
for southwestern Illinois.

LAT...LON 3822 8987 3822 9003 3815 9004 3809 9019
      3854 9052 3872 8982 3880 8953 3887 8907
      3891 8881 3891 8869 3864 8870
TIME...MOT...LOC 2324Z 332DEG 51KT 3906 8853 3877 8898 3845 8964 3858
9022

$$

ILC005-027-051-119-121-133-163-189-MOC099-189-510-282345-
/O.CON.KLSX.SV.W.0165.000000T0000Z-180628T2345Z/
Clinton IL-Bond IL-Monroe IL-Washington IL-Madison IL-Marion IL-
Fayette IL-St. Clair IL-St. Louis City MO-Jefferson MO-St. Louis MO-
625 PM CDT THU JUN 28 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR CLINTON AND SOUTHERN BOND COUNTIES IN SOUTH CENTRAL ILLINOIS...
MONROE COUNTY IN SOUTHWESTERN ILLINOIS...NORTHERN WASHINGTON COUNTY
IN SOUTH CENTRAL ILLINOIS...SOUTHEASTERN MADISON COUNTY IN
SOUTHWESTERN ILLINOIS...MARION AND SOUTHERN FAYETTE COUNTIES IN SOUTH
CENTRAL ILLINOIS...ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
NORTHEASTERN JEFFERSON AND SOUTH CENTRAL ST. LOUIS COUNTIES IN EAST
CENTRAL MISSOURI AND SOUTHERN ST. LOUIS CITY...

At 624 PM CDT, severe thunderstorms were located along a line
extending from near Watson to 6 miles east of Patoka to near New
Memphis to near Cahokia, moving southeast at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters. Tree limbs were recently reported 
         down in Bartelso. 

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
St. Louis, Belleville, O'Fallon, Kirkwood, East St. Louis,
Collinsville, Webster Groves, Arnold, Fairview Heights, Cahokia,
Swansea, Centralia, Shiloh, Crestwood, Highland, Waterloo, Columbia,
Sunset Hills, Salem and Mascoutah.

This also includes  Mastodon Historic Site and Carlyle Lake
Recreational Area.
 
This includes the following highways...
 Interstate 57 in Illinois between exits 116 and 135.
 Interstate 64 in Illinois between exits 9 and 41.
 Interstate 44 in Missouri between exits 272 and 277.
 Interstate 55 in Missouri between exits 187 and 191.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3822 8987 3822 9003 3815 9004 3809 9019
      3854 9052 3872 8982 3880 8953 3887 8907
      3891 8881 3891 8869 3864 8870
TIME...MOT...LOC 2324Z 332DEG 51KT 3906 8853 3877 8898 3845 8964 3858
9022

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

Kanofsky
344 
WWUS53 KLSX 282328
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
628 PM CDT THU JUN 28 2018

MOC099-189-282338-
/O.CAN.KLSX.SV.W.0165.000000T0000Z-180628T2345Z/
Jefferson MO-St. Louis MO-
628 PM CDT THU JUN 28 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON AND
SOUTH CENTRAL ST. LOUIS COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central and southwestern Illinois...and east central Missouri.
A Severe Thunderstorm Watch also remains in effect until 100 AM CDT
for southwestern Illinois.

LAT...LON 3864 8870 3822 8987 3822 9003 3852 9027
      3853 9026 3859 9032 3880 8953 3891 8881
      3891 8869
TIME...MOT...LOC 2328Z 320DEG 52KT 3903 8850 3874 8895 3842 8961 3855
9019

$$

ILC005-027-051-119-121-133-163-189-MOC510-282345-
/O.CON.KLSX.SV.W.0165.000000T0000Z-180628T2345Z/
Clinton IL-Bond IL-Monroe IL-Washington IL-Madison IL-Marion IL-
Fayette IL-St. Clair IL-St. Louis City MO-
628 PM CDT THU JUN 28 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR CLINTON AND SOUTHERN BOND COUNTIES IN SOUTH CENTRAL ILLINOIS...
NORTHEASTERN MONROE COUNTY IN SOUTHWESTERN ILLINOIS...NORTHERN
WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS...SOUTHEASTERN MADISON
COUNTY IN SOUTHWESTERN ILLINOIS...MARION AND SOUTHERN FAYETTE
COUNTIES IN SOUTH CENTRAL ILLINOIS...ST. CLAIR  IN SOUTHWESTERN
ILLINOIS AND SOUTHERN ST. LOUIS CITY...

At 628 PM CDT, severe thunderstorms were located along a line
extending from near Watson to near Kinmundy to near Okawville to
Cahokia, moving southeast at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters. Many trees and power lines have 
         been reported down.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
St. Louis, Belleville, O'Fallon, East St. Louis, Collinsville,
Fairview Heights, Cahokia, Swansea, Centralia, Shiloh, Highland,
Waterloo, Columbia, Salem, Mascoutah, Centreville, Breese, Lebanon,
Freeburg and Caseyville.

This also includes  Carlyle Lake Recreational Area.
 
This includes the following highways...
 Interstate 57 in Illinois between exits 116 and 135.
 Interstate 64 in Illinois between exits 9 and 41.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3864 8870 3822 8987 3822 9003 3852 9027
      3853 9026 3859 9032 3880 8953 3891 8881
      3891 8869
TIME...MOT...LOC 2328Z 320DEG 52KT 3903 8850 3874 8895 3842 8961 3855
9019

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

Kanofsky
139 
WWUS53 KLSX 282344
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
644 PM CDT THU JUN 28 2018

ILC005-027-051-119-121-133-163-189-MOC510-282354-
/O.EXP.KLSX.SV.W.0165.000000T0000Z-180628T2345Z/
Clinton IL-Bond IL-Monroe IL-Washington IL-Madison IL-Marion IL-
Fayette IL-St. Clair IL-St. Louis City MO-
644 PM CDT THU JUN 28 2018

...THE SEVERE THUNDERSTORM WARNING FOR CLINTON AND SOUTHERN BOND
COUNTIES IN SOUTH CENTRAL ILLINOIS...NORTHEASTERN MONROE COUNTY IN
SOUTHWESTERN ILLINOIS...NORTHERN WASHINGTON COUNTY IN SOUTH CENTRAL
ILLINOIS...SOUTHEASTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS...
MARION AND SOUTHERN FAYETTE COUNTIES IN SOUTH CENTRAL ILLINOIS...ST.
CLAIR  IN SOUTHWESTERN ILLINOIS AND SOUTHERN ST. LOUIS CITY WILL
EXPIRE AT 645 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 800 PM CDT for
south central and southwestern Illinois...and east central Missouri.
A Severe Thunderstorm Watch also remains in effect until 100 AM CDT
for southwestern Illinois.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of these counties.

LAT...LON 3864 8870 3822 8987 3822 9003 3852 9027
      3853 9026 3859 9032 3880 8953 3891 8881
      3891 8869
TIME...MOT...LOC 2344Z 320DEG 52KT 3887 8833 3858 8878 3826 8944 3839
9002

$$

Kanofsky

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 28, 3:44 PM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, Jun 28, 3:44 PM CDT, 1 hour 38 minutes before
Area Forecast Discussion
National Weather Service Saint Louis MO
344 PM CDT Thu Jun 28 2018

.SHORT TERM...  (Through Late Friday Afternoon)
Issued at 344 PM CDT Thu Jun 28 2018

The complex of thunderstorms originating over eastern Nebraska and
western Iowa early this morning has matured into a well-organized
thunderstorm complex. This system is capable of producing damaging
winds and frequent lightning and will continue to be the focus this
afternoon into this evening.

As upper ridging continues to build in, a warm front draped across
the region will be the dividing line between sunny and warm
conditions through central Missouri, to slightly cooler and active
weather along and east of the Mississippi River. Mesoanalysis
continues to show a steep CAPE gradients centered over the CWA with
MUCAPE values exceeding 5000 J/kg over northeast Missouri and
trending down to near 3000 J/kg over Illinois. Capping has also
weakened and even eroded through much of the region.

High res guidance has struggled to recognize the origin and
evolution of this complex. HRRR only recently picked up on this,
while NAMNest was much further west. As upper ridging builds
northeast, relatively stable air will become more solidified over
central portions of the state. As a result, the MCS will continue to
track around the eastern periphery of the ridge and along the
instability gradient. Should thunderstorms survive, expect the line
to push along and east the Mississippi through about 02-03z before
exiting to the southeast.

Beyond this evening, skies clear and conditions calm with the next
concern being heat and humidity for Friday. As the warm front pushes
east, temperatures will climb well into the 90s, possibly touching
100 in spots. Provided dewpoints well into the 70s, heat indices
will likely become dangerous through the afternoon, mainly in far
east-central Missouri and into Illinois. Heat indices may exceed 110
degree east in many places in Illinois.

Maples

.LONG TERM...  (Friday Night through Next Thursday)
Issued at 344 PM CDT Thu Jun 28 2018

(Friday Night - Saturday Night)

Main focus at the beginning of the extended will continue to be on
the ongoing heat wave. Have relatively high confidence in
temperatures and dewpoints on Saturday. Very hot and humid airmass
will remain in place as upper-level ridge slowly slides eastward
into the Ohio Valley. Probably will see some slight lowering of
dewpoints due to deeper mixing and soil moisture drying out ever so
slightly. All that being said, am expecting high temperatures on
Saturday in the low to mid 90s, with peak heat index values of 100-
110 across the area. Highest values are forecast for the St. Louis
metro area and portions of western Illinois. Because of two days of
expected HI values near or just above 110 degrees, will upgrade
these areas to an excessive heat warning.

(Sunday - Next Thursday)

At least a little relief from the oppressive heat is expected by
Sunday or Monday as a weak cold front attempts to move through the
CWA. Model guidance is in fairly good agreement that the front will
either just clear or at least make it into far southern portions of
the forecast area by Monday afternoon. Along with slightly cooler
air behind the boundary, an increase in overall cloud cover along
with chances for showers and thunderstorms should yield high
temperatures back into the upper 80s to low 90s by Monday. No
changes made to the heat headlines in terms of duration, but could
need an additional day (Sunday) for the advisory/warning if
confidence in temperatures increases.

Unfortunately, the brief reprieve expected from the really hot and
humid conditions on Monday will be very short lived. The mid/upper
level ridge elongates and strengthens toward the middle of next week
which should yield increasing temperatures with continued humid
conditions. Weak frontal boundary that went through as a cold front
Sunday/Monday is expected to retreat back northward as a warm front
on Tuesday. This boundary may provide a focus for showers and
thunderstorms as well.

As alluded to yesterday, no end in sight to the overall hot/humid
pattern with mid/upper level ridge really flexing its muscles nearly
from coast to coast.

Gosselin

&&

.AVIATION...  (For the 18z TAFs through 18z Friday Afternoon)
Issued at 1247 PM CDT Thu Jun 28 2018

The main challenge will come within the first 6-8 hours of the
TAF period with regard to afternoon convection. Otherwise, VFR is
expected through a large portion of the forecast.

Current satellite imagery makes it easy to pick out the
thunderstorm complex over south-central Iowa. Thoughts are that
this complex will track southeast through the afternoon along a
frontal boundary, which is currently draped across sections of
eastern Missouri and far southern Illinois. Out ahead of this
complex, clear skies and increasing instability may result in
widely scattered/isolated storms. While coverage/intensity will
heavily rely on the health of the Iowa system, enough confidence
exists to keep VCTS in for all eastern sites this afternoon. Cigs
and vsbys are expected to remain VFR outside of storms with
periodic dips into MVFR for those affected by storms.

More stable air is expected to build far enough east to keep KCOU
west of the development. Therefore, held off on VCTS mention.

SPECIFICS FOR KSTL:

Much of the cloud cover from morning convection has eroded with
sct/few mid-to-high VFR cigs for now. Currently watching trends
in the thunderstorm complex over south-central Iowa. This, along
with scattered/isolated afternoon thunderstorms developing along a
frontal boundary, may impact KSTL. Given some question into the
overall health and persistence with the complex, maintaining VCTS
was the best option. Most likely time for storms will be from mid
afternoon through sunset. Cigs/vsbys will remain VFR outside of
storms, but may periodically dip, should thunderstorms directly
impact KSTL.

Conditions improve after 00z with VFR conditions expected through
the rest of the period.

Maples

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Heat Advisory until 10 PM CDT Saturday for Audrain MO-Boone MO-
     Callaway MO-Cole MO-Crawford MO-Franklin MO-Gasconade MO-
     Iron MO-Knox MO-Lewis MO-Lincoln MO-Madison MO-Marion MO-
     Moniteau MO-Monroe MO-Montgomery MO-Osage MO-Pike MO-Ralls
     MO-Reynolds MO-Saint Francois MO-Sainte Genevieve MO-Shelby
     MO-Warren MO-Washington MO.

     Excessive Heat Warning until 10 PM CDT Saturday for Jefferson MO-
     Saint Charles MO-Saint Louis City MO-Saint Louis MO.

IL...Heat Advisory until 10 PM CDT Saturday for Adams IL-Brown IL-
     Pike IL-Randolph IL-Washington IL.

     Excessive Heat Warning until 10 PM CDT Saturday for Calhoun IL-
     Clinton IL-Greene IL-Jersey IL-Macoupin IL-Madison IL-
     Monroe IL-Saint Clair IL.

     Excessive Heat Warning from 11 AM Friday to 10 PM CDT Saturday
     for Bond IL-Fayette IL-Marion IL-Montgomery IL.

&&

WFO LSX
Hazardous weather outlook, Jun 28, 3:58 PM CDT, 1 hour 24 minutes before
Hazardous Weather Outlook
National Weather Service Saint Louis MO
358 PM CDT Thu Jun 28 2018

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-291115-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
358 PM CDT Thu Jun 28 2018

This hazardous weather outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Tonight

Thunderstorms are likely through early this evening across
portions of northeast Missouri and west-central Illinois. Some of
these storms are expected to be strong to severe with damaging
straight-line winds and large hail the primary threats.

Heat products are currently in effect. Heat index values of 105
to 110+ are expected. For more details, please see the heat
advisory and excessive heat warning for more details.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Heat products remain in effect through Saturday. Heat index
values of 105 to 110+ are expected each day. For more details,
please see the heat advisory and excessive heat warning for more
details.

There is a low chance of thunderstorms Saturday night through
Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this evening across
portions of northeast Missouri and west-central Illinois.

Gosselin

In the hours before

Local storm report, Jun 28, 5:01 PM CDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
501 PM CDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0441 PM     TSTM WND GST     WHITE HALL              39.44N 90.40W
06/28/2018  E45 MPH          GREENE             IL   PUBLIC

&&
Local storm report, Jun 28, 5:07 PM CDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
507 PM CDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0345 PM     TSTM WND DMG     3 SSW SAVERTON          39.61N 91.30W
06/28/2018                   RALLS              MO   LAW ENFORCEMENT

            TREE ACROSS ROAD.

&&
Local storm report, Jun 28, 5:13 PM CDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
513 PM CDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0509 PM     TSTM WND GST     4 NNW ORCHARD FARMS     38.92N 90.48W
06/28/2018  M46 MPH          ST. CHARLES        MO   TRAINED SPOTTER

            TRAINED SPOTTER MEASURED 46MPH WIND GUST.

&&

AE
Local storm report, Jun 28, 5:16 PM CDT, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
516 PM CDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0510 PM     TSTM WND GST     3 NNE ORCHARD FARMS     38.93N 90.43W
06/28/2018  M45 MPH          ST. CHARLES        MO   ASOS

&&
Local storm report, Jun 28, 5:18 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
518 PM CDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0517 PM     TSTM WND GST     3 NNE ORCHARD FARMS     38.93N 90.43W
06/28/2018  M59 MPH          ST. CHARLES        MO   AWOS

&&
Local storm report, Jun 28, 5:21 PM CDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
521 PM CDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0521 PM     TSTM WND GST     1 N IRVING              39.21N 89.40W
06/28/2018  E45 MPH          MONTGOMERY         IL   LAW ENFORCEMENT

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 4:34 AM CDTSevere Thunderstorm WarningLSXBoone41 min
Jun 28, 4:51 AM CDTSevere Thunderstorm WarningLSXAudrain, Montgomery, Pike39 min
Jun 28, 5:12 AM CDTSevere Thunderstorm WarningLSXAudrain, Boone2 min
Jun 28, 5:18 AM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Callaway42 min
Jun 28, 5:26 AM CDTFlash Flood WarningLSXBoone4 hr
Jun 28, 5:58 AM CDTSevere Thunderstorm WarningLSXBoone, Callaway47 min
Jun 28, 6:17 AM CDTFlash Flood WarningLSXAudrain, Callaway3 hr
Jun 28, 6:54 AM CDTSpecial Weather StatementLSXMarion, Ralls36 min
Jun 28, 7:34 AM CDTSevere Thunderstorm WarningLSXMonroe, Ralls41 min
Jun 28, 7:58 AM CDTSevere Thunderstorm WarningLSXRalls47 min
Jun 28, 8:03 AM CDTSevere Thunderstorm WarningLSXJefferson42 min
Jun 28, 8:23 AM CDTSpecial Weather StatementLSXRalls37 min
Jun 28, 8:37 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois38 min
Jun 28, 8:49 AM CDTSpecial Weather StatementLSXMadison41 min
Jun 28, 8:53 AM CDTSevere Thunderstorm WarningLSXAudrain, Pike, Ralls33 min
Jun 28, 8:59 AM CDTSevere Thunderstorm WarningLSXMadison34 min
Jun 28, 2:00 PM CDTSevere Thunderstorm WarningLSXKnox, Lewis, Shelby60 min
Jun 28, 2:37 PM CDTSevere Thunderstorm WarningLSXLewis, Marion53 min
Jun 28, 2:50 PM CDTSevere Thunderstorm WarningLSXKnox, Lewis, Marion, Shelby40 min
Jun 28, 3:21 PM CDTSevere Thunderstorm WarningLSXMarion, Monroe, Pike, Ralls, Shelby69 min
Jun 28, 3:52 PM CDTExcessive Heat WarningLSXJefferson, Saint Charles, Sainte Genevieve, Saint Louis, City of Saint Louis3 days
Jun 28, 4:00 PM CDTSevere Thunderstorm WarningLSXPike, Ralls60 min
Jun 28, 4:35 PM CDTSevere Thunderstorm WarningLSXLincoln40 min
Jun 28, 5:02 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles, Saint Louis73 min
Jun 28, 5:29 PM CDTTornado WarningLSXSaint Charles, Saint Louis, City of Saint Louis16 min
Jun 28, 4:18 PM CDTSpecial Weather StatementLSXGreene, Macoupin57 min
Jun 28, 4:39 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Jersey, Macoupin, Montgomery, Pike66 min
Jun 28, 5:54 PM CDTTornado WarningLSXSaint Clair17 min
Jun 28, 5:59 PM CDTAreal Flood AdvisoryLSXJersey, Madison3 hr
Jun 28, 6:21 PM CDTSevere Thunderstorm WarningLSXClinton, Marion, Monroe, Randolph, Saint Clair, Washington69 min
Jun 28, 6:48 PM CDTAreal Flood AdvisoryLSXBond, Clinton, Fayette, Madison, Marion, Monroe and 2 more3 hr
Jun 28, 6:56 PM CDTSevere Thunderstorm WarningLSXMonroe, Randolph64 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2018Severe Thunderstorm Warnings in Missouri, 2018Every severe thunderstorm warning in 2018

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.