Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 67, NWS St. Louis, MO

June 19, 2021Saint Charles County, Saint Louis County, Missouri; Calhoun County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 2021, 4:43 PM CDT for Saint Charles County, Saint Louis County, Missouri; Calhoun County, Illinois. It was in force for 47 min. 6 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 19, 2021, 4:43 PM CDT (21:43 UTC)
Expired
Jun 19, 2021, 5:30 PM CDT
In force
47 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Calhoun County, IL, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 18 km from the middle of the area, began a volume at 21:42 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 19, 4:48 PM CDTTSTM WND DMGHarvester, MOVIA TWITTER PHOTO. MULTIPLE TREE LIMBS DOWNED. TIME ESTIMATED FROM RADAR.
Jun 19, 4:48 PM CDTTSTM WND DMGHarvester, MOVIA TWITTER PHOTO. SEVERAL TREE LIMBS DOWNED. TIME ESTIMATED FROM RADAR.
Jun 19, 5:10 PM CDTHAIL 1Saint Charles, MO
Jun 19, 5:17 PM CDTTSTM WND GST 601 Wsw Harvester, MOALSO, VERY HEAVY RAINFALL.
Jun 19, 5:30 PM CDTHAIL 0.25Creve Coeur, MO
Jun 19, 5:35 PM CDTTSTM WND DMG2 Se Harvester, MOMULTIPLE 8 INCH TREE LIMBS DOWNED.

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
Jun 19, 2:43 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 226 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 2021-06-19Temperature 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 12:00Z on 2021-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.19395878Sfc1 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
1960 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

937 
WUUS53 KLSX 192143
SVRLSX
ILC013-MOC183-189-192230-
/O.NEW.KLSX.SV.W.0067.210619T2143Z-210619T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
443 PM CDT Sat Jun 19 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  South central Calhoun County in southwestern Illinois...
  Northwestern St. Charles County in east central Missouri...
  Central St. Louis County in east central Missouri...

* Until 530 PM CDT.

* At 442 PM CDT, a severe thunderstorm was located over St. Paul,
  moving southeast at 30 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.

* This severe thunderstorm will be near...
  St. Charles, St. Peters, Weldon Spring and Harvester around 455 PM 
  CDT.
  Maryland Heights around 500 PM CDT.

Other locations in the path of this severe thunderstorm include
Chesterfield, Town and Country, Champ, Florissant, Hazelwood,
Overland, St. Ann, Bridgeton, Berkeley, Lambert-St. Louis
International Airport, Kirkwood, Ferguson, Creve Coeur, Ladue, Des
Peres, Olivette, St. John, Woodson Terrace, Frontenac, Bel-Ridge,
University City, Clayton, Jennings, Bellefontaine Neighbors, Richmond
Heights, Brentwood, Glendale, Dellwood, Normandy and Northwoods.

This includes Interstate 70 in Missouri between exits 214 and 231.
 
This also includes 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 3859 9038 3884 9086 3892 9077 3893 9073
      3893 9072 3892 9074 3891 9072 3892 9071
      3892 9069 3893 9070 3893 9067 3895 9067
      3874 9023
TIME...MOT...LOC 2142Z 299DEG 33KT 3885 9069 

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

KD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 2:15 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike31 min
Jun 19, 2:44 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike32 min
Jun 19, 2:52 PM CDTSevere Thunderstorm WarningLSXPike38 min
Jun 19, 2:55 PM CDTSevere Thunderstorm WarningLSXLincoln50 min
Jun 19, 3:21 PM CDTSevere Thunderstorm WarningLSXPike25 min
Jun 19, 3:31 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles44 min
Jun 19, 4:16 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles, Saint Louis44 min
Jun 19, 4:35 PM CDTFlash Flood WarningLSXSaint Charles6 hr
Jun 19, 5:09 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis51 min
Jun 19, 5:17 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis43 min
Jun 19, 5:25 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis35 min
Jun 19, 5:31 PM CDTSevere Thunderstorm WarningLSXMarion, Ralls59 min
Jun 19, 5:46 PM CDTSevere Thunderstorm WarningLSXPike, Ralls59 min
Jun 19, 5:58 PM CDTFlash Flood WarningLSXMarion, Pike, Ralls6 hr
Jun 19, 6:00 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis45 min
Jun 19, 6:46 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike44 min
Jun 19, 6:54 PM CDTSevere Thunderstorm WarningLSXMonroe, Ralls51 min
Jun 19, 5:44 AM CDTSevere Thunderstorm WarningLSXMarion18 min
Jun 19, 10:45 AM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery45 min
Jun 19, 4:10 PM CDTFlash Flood WarningLSXCalhoun6 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2021Severe Thunderstorm Warnings in Illinois, 2021Every severe thunderstorm warning in 2021

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.