Alert archive / Missouri / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 68, NWS St. Louis, MO

May 11, 2016Franklin County, Jefferson County, Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2016, 12:47 PM CDT for Franklin County, Jefferson County, Saint Louis County, Missouri. It was in force for 28 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
May 11, 2016, 12:47 PM CDT (17:47 UTC)
Expired
May 11, 2016, 1:15 PM CDT
In force
28 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Franklin County, MO, Jefferson County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 29 km from the middle of the area, began a volume at 17:47 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
May 11, 12:54 PM CDTHAIL 0.75House Springs, MO
May 11, 12:57 PM CDTHAIL 12 S Byrnes Mill, MO
May 11, 1:12 PM CDTHAIL 0.7Byrnes Mill, MO
May 11, 1:20 PM CDTTSTM WND DMG4 Wsw Arnold, MOTREE DOWN
May 11, 1:20 PM CDTHAIL 14 Wsw Arnold, MOTREE DOWN
May 11, 1:25 PM CDTHAIL 0.25High Ridge, 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.

IssuedProductOfficeLasted
May 11, 12:10 PM CDTSevere Thunderstorm WatchSPC12 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.8 hours before the alert went out and 258 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 2016-05-11Temperature 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 2016-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
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.

565 
WUUS53 KLSX 111747
SVRLSX
MOC071-099-189-111815-
/O.NEW.KLSX.SV.W.0068.160511T1747Z-160511T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1247 PM CDT WED MAY 11 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
  NORTHWESTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
  EAST CENTRAL FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 115 PM CDT

* AT 1247 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER BYRNES MILL...
  MOVING EAST 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. 

* LOCATIONS IMPACTED INCLUDE...
  WILDWOOD...KIRKWOOD...WEBSTER GROVES...ARNOLD...CRESTWOOD...EUREKA...
  SUNSET HILLS...PACIFIC...VALLEY PARK...FENTON...BYRNES MILL...GRAY
  SUMMIT...HIGH RIDGE...MURPHY...AFFTON...MARLBOROUGH...GRANTWOOD VILLAGE...
  HOUSE SPRINGS...SAPPINGTON AND CONCORD.

THIS INCLUDES INTERSTATE 44 IN MISSOURI BETWEEN EXITS 257 AND 277.
 
THIS ALSO INCLUDES  ROUTE 66 STATE PARK.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3836 9078 3851 9082 3857 9034 3841 9040
TIME...MOT...LOC 1747Z 255DEG 27KT 3846 9061 

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

GLASS

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 3:19 AM CDTDense Fog AdvisoryLSXJefferson, Lincoln, Madison, Pike, Saint Charles, Sainte Genevieve and 3 more6 hr
May 11, 10:08 AM CDTSevere Thunderstorm WarningLSXAudrain, Boone52 min
May 11, 10:25 AM CDTSevere Thunderstorm WarningLSXAudrain, Callaway50 min
May 11, 10:52 AM CDTSevere Thunderstorm WarningLSXAudrain, Callaway, Montgomery, Pike38 min
May 11, 11:24 AM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike51 min
May 11, 12:26 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis, Warren49 min
May 11, 12:29 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Washington46 min
May 11, 1:08 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis, City of Saint Louis52 min
May 11, 1:12 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis48 min
May 11, 1:51 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis, City of Saint Louis54 min
May 11, 1:55 PM CDTSevere Thunderstorm WarningLSXSaint Louis65 min
May 11, 2:12 PM CDTSevere Thunderstorm WarningLSXJefferson, Sainte Genevieve63 min
May 11, 3:11 PM CDTSevere Thunderstorm WarningLSXSaint Francois, Washington49 min
May 11, 3:15 PM CDTSevere Thunderstorm WarningLSXJefferson, Sainte Genevieve, Saint Francois45 min
May 11, 3:52 PM CDTFlash Flood WarningLSXJefferson, Sainte Genevieve4 hr
May 11, 3:57 PM CDTSevere Thunderstorm WarningLSXJefferson, Sainte Genevieve63 min
May 11, 4:05 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois, Washington40 min
May 11, 4:45 PM CDTSevere Thunderstorm WarningLSXJefferson, Sainte Genevieve, Saint Francois, Washington60 min
May 11, 5:16 PM CDTSevere Thunderstorm WarningLSXAudrain, Montgomery, Pike, Ralls44 min
May 11, 5:18 PM CDTSevere Thunderstorm WarningLSXCrawford27 min
May 11, 5:18 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Montgomery, Osage, Warren42 min
May 11, 5:26 PM CDTFlash Flood WarningLSXSainte Genevieve, Saint Francois4 hr
May 11, 5:35 PM CDTSevere Thunderstorm WarningLSXCallaway, Montgomery40 min
May 11, 5:45 PM CDTSevere Thunderstorm WarningLSXSaint Francois, Washington45 min
May 11, 5:56 PM CDTSevere Thunderstorm WarningLSXAudrain, Lincoln, Montgomery, Pike, Ralls64 min
May 11, 6:12 PM CDTSevere Thunderstorm WarningLSXCallaway, Lincoln, Montgomery, Warren48 min
May 11, 6:29 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Sainte Genevieve, Saint Francois, Washington46 min
May 11, 6:42 PM CDTSevere Thunderstorm WarningLSXPike, Ralls48 min
May 11, 6:50 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike, Saint Charles, Warren40 min

Nearby

Severe Thunderstorm Warnings in Missouri, 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.