Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 431, NWS St. Louis, MO

July 3, 2011Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 3, 2011, 2:16 PM CDT for Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 3, 2011, 2:16 PM CDT (19:16 UTC)
Expired: Jul 3, 2011, 3:00 PM CDT
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 89 km from the middle of the area, began a volume at 19:18 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 3, 1:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.3 hours before the alert went out and 288 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

351 
WUUS53 KLSX 031916
SVRLSX
MOC186-187-032000-
/O.NEW.KLSX.SV.W.0431.110703T1916Z-110703T2000Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 300 PM CDT

* AT 214 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 5 MILES
  WEST OF ROCKY RIDGE...OR 11 MILES NORTHEAST OF DESLOGE...AND MOVING
  EAST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROCKY RIDGE...WEINGARTEN AND BLOOMSDALE.

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 3787 9048 3804 9043 3805 9041 3803 9011
      3779 9018
TIME...MOT...LOC 1916Z 283DEG 2KT 3794 9034
WIND...HAIL 60MPH 1.00IN

$$

CARNEY

1 follow-up statement

599 
WWUS53 KLSX 031956
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
256 PM CDT SUN JUL 3 2011

MOC186-187-032006-
/O.EXP.KLSX.SV.W.0431.000000T0000Z-110703T2000Z/
STE. GENEVIEVE MO-ST. FRANCOIS MO-
256 PM CDT SUN JUL 3 2011

...THE SEVERE THUNDERSTORM WARNING FOR ST. FRANCOIS AND CENTRAL STE.
GENEVIEVE COUNTIES WILL EXPIRE AT 300 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM.

LAT...LON 3787 9048 3804 9043 3805 9041 3803 9011
      3779 9018
TIME...MOT...LOC 1956Z 283DEG 2KT 3793 9031

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 1:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	42 min
Jul 3, 1:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	46 min
Jul 3, 1:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	46 min
Jul 3, 1:41 PM CDT	Severe Thunderstorm Warning	LSX	Boone	49 min
Jul 3, 1:54 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	51 min
Jul 3, 2:02 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	58 min
Jul 3, 2:12 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis	48 min
Jul 3, 2:13 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	47 min
Jul 3, 2:22 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	20 min
Jul 3, 2:24 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	51 min
Jul 3, 2:29 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	46 min
Jul 3, 2:33 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	42 min
Jul 3, 2:34 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	26 min
Jul 3, 2:50 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Warren, City of Saint Louis	40 min
Jul 3, 2:51 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Osage	24 min
Jul 3, 2:55 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Warren	35 min
Jul 3, 3:05 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	25 min
Jul 3, 3:24 PM CDT	Areal Flood Advisory	LSX	Sainte Genevieve, Saint Louis	6 hr
Jul 3, 3:26 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Lincoln, Montgomery, Osage and 2 more	64 min
Jul 3, 3:56 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis	49 min
Jul 3, 4:34 PM CDT	Areal Flood Advisory	LSX	Franklin, Lincoln, Saint Charles, Warren	5 hr
Jul 3, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	35 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.