Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 433, NWS St. Louis, MO

July 3, 2011Franklin County, Warren County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 3, 2011, 2:24 PM CDT for Franklin County, Warren County, Missouri. It was in force for 51 min. 2 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
Jul 3, 2011, 2:24 PM CDT (19:24 UTC)
Expired
Jul 3, 2011, 3:15 PM CDT
In force
51 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Franklin County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 34 km from the middle of the area, began a volume at 19:27 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
Jul 3, 2:33 PM CDTHAIL 13 S New Haven, MO
Jul 3, 2:37 PM CDTHAIL 0.253 N Union, 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
Jul 3, 1:15 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.4 hours before the alert went out and 273 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 2011-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1911 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 2011-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
1911 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
884 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

467 
WUUS53 KLSX 031924
SVRLSX
MOC071-219-032015-
/O.NEW.KLSX.SV.W.0433.110703T1924Z-110703T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
224 PM CDT SUN JUL 3 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHEASTERN WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 315 PM CDT

* AT 223 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  NEW HAVEN...AND MOVING EAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WASHINGTON...TRELOAR...DUTZOW...MARTHASVILLE...LYON AND HOLSTEIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3871 9097 3855 9097 3854 9093 3848 9088
      3845 9128 3863 9132
TIME...MOT...LOC 1924Z 259DEG 8KT 3856 9119
WIND...HAIL 60MPH 1.00IN

$$

CARNEY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 1:18 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade42 min
Jul 3, 1:29 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis, Warren46 min
Jul 3, 1:29 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Washington46 min
Jul 3, 1:41 PM CDTSevere Thunderstorm WarningLSXBoone49 min
Jul 3, 1:54 PM CDTSevere Thunderstorm WarningLSXFranklin51 min
Jul 3, 2:02 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway58 min
Jul 3, 2:12 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis48 min
Jul 3, 2:13 PM CDTSevere Thunderstorm WarningLSXFranklin47 min
Jul 3, 2:16 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois44 min
Jul 3, 2:22 PM CDTSevere Thunderstorm WarningLSXSaint Francois20 min
Jul 3, 2:29 PM CDTSevere Thunderstorm WarningLSXCole, Osage46 min
Jul 3, 2:33 PM CDTSevere Thunderstorm WarningLSXCallaway42 min
Jul 3, 2:34 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis26 min
Jul 3, 2:50 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis, Warren, City of Saint Louis40 min
Jul 3, 2:51 PM CDTSevere Thunderstorm WarningLSXCallaway, Osage24 min
Jul 3, 2:55 PM CDTSevere Thunderstorm WarningLSXCallaway, Franklin, Gasconade, Montgomery, Warren35 min
Jul 3, 3:05 PM CDTSevere Thunderstorm WarningLSXCallaway, Gasconade, Montgomery, Osage25 min
Jul 3, 3:24 PM CDTAreal Flood AdvisoryLSXSainte Genevieve, Saint Louis6 hr
Jul 3, 3:26 PM CDTSevere Thunderstorm WarningLSXCallaway, Franklin, Gasconade, Lincoln, Montgomery, Osage and 2 more64 min
Jul 3, 3:56 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles, Saint Louis49 min
Jul 3, 4:34 PM CDTAreal Flood AdvisoryLSXFranklin, Lincoln, Saint Charles, Warren5 hr
Jul 3, 5:25 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds35 min

Nearby

Severe Thunderstorm Warnings in Missouri, 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.