Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 269, NWS St. Louis, MO

June 10, 2011Franklin County, Warren County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 10, 2011, 5:46 PM CDT for Franklin County, Warren County, Missouri. It was in force for 44 min. 4 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 10, 2011, 5:46 PM CDT (22:46 UTC)
Expired: Jun 10, 2011, 6:30 PM CDT
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Franklin County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 48 km from the middle of the area, began a volume at 22:49 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

Time	Report	Where	Remark
Jun 10, 6:01 PM CDT	HAIL 0.5	3 E New Haven, MO	BRIEF WIND GUST ESTIMATED BETWEEN 50 TO 60 MPH.
Jun 10, 6:05 PM CDT	HAIL 1	5 Ese New Haven, MO
Jun 10, 6:11 PM CDT	HAIL 1	7 S New Haven, MO	HAIL RANGES FROM PEA SIZED TO QUARTER SIZED
Jun 10, 6:14 PM CDT	HAIL 0.7	Marthasville, 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.

Issued	Product	Office	Lasted
Jun 10, 4:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 286 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: 581 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 670 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

553 
WUUS53 KLSX 102246
SVRLSX
MOC071-219-102330-
/O.NEW.KLSX.SV.W.0269.110610T2246Z-110610T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
546 PM CDT FRI JUN 10 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 630 PM CDT

* AT 545 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES
  NORTHWEST OF BEAUFORT...OR 9 MILES SOUTH OF NEW HAVEN...AND MOVING
  NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NEW HAVEN...WASHINGTON...MARTHASVILLE...DUTZOW AND LYON.

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.

&&

LAT...LON 3859 9134 3869 9097 3866 9096 3847 9102
      3835 9126 3845 9137 3855 9137
TIME...MOT...LOC 2246Z 229DEG 15KT 3848 9125
WIND...HAIL 60MPH 1.75IN

$$

TES

2 follow-up statements

931 
WWUS53 KLSX 102305
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
605 PM CDT FRI JUN 10 2011

MOC071-219-102330-
/O.CON.KLSX.SV.W.0269.000000T0000Z-110610T2330Z/
FRANKLIN MO-WARREN MO-
605 PM CDT FRI JUN 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
WARREN AND NORTHWESTERN FRANKLIN COUNTIES UNTIL 630 PM CDT...

AT 603 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
SOUTH OF NEW HAVEN...MOVING NORTHEAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  NEW HAVEN...WASHINGTON...MARTHASVILLE AND DUTZOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL. PEOPLE OUTSIDE SHOULD MOVE 
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM 
WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3859 9134 3869 9097 3866 9096 3847 9102
      3835 9126 3845 9137 3855 9137
TIME...MOT...LOC 2305Z 229DEG 15KT 3853 9117
WIND...HAIL 60MPH 1.75IN

$$

TES

889 
WWUS53 KLSX 102330
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
630 PM CDT FRI JUN 10 2011

MOC071-219-102340-
/O.EXP.KLSX.SV.W.0269.000000T0000Z-110610T2330Z/
FRANKLIN MO-WARREN MO-
630 PM CDT FRI JUN 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WARREN AND
NORTHWESTERN FRANKLIN COUNTIES HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3859 9134 3869 9097 3866 9096 3847 9102
      3835 9126 3845 9137 3855 9137
TIME...MOT...LOC 2305Z 229DEG 15KT 3853 9117

$$

TES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 9:55 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis	50 min
Jun 9, 10:28 PM CDT	Flash Flood Warning	LSX	Knox	6 hr
Jun 9, 10:53 PM CDT	Flash Flood Warning	LSX	Lewis	6 hr
Jun 9, 11:07 PM CDT	River Flood Warning	LSX	Lewis	11 hr
Jun 9, 11:07 PM CDT	River Flood Warning	LSX	Lewis	11 hr
Jun 9, 11:16 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Shelby	44 min
Jun 10, 11:38 AM CDT	River Flood Warning	LSX	Lewis	13 days
Jun 10, 11:38 AM CDT	River Flood Warning	LSX	Marion	14 days
Jun 10, 11:38 AM CDT	River Flood Warning	LSX	Ralls	14 days
Jun 10, 3:49 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Osage	41 min
Jun 10, 4:38 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery	52 min
Jun 10, 4:40 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway	50 min
Jun 10, 4:42 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Montgomery, Warren	48 min
Jun 10, 4:48 PM CDT	Severe Thunderstorm Warning	LSX	Knox	27 min
Jun 10, 5:02 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	28 min
Jun 10, 5:06 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike, Ralls	39 min
Jun 10, 5:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Montgomery, Warren	31 min
Jun 10, 5:36 PM CDT	Severe Thunderstorm Warning	LSX	Lewis	39 min
Jun 10, 5:42 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Pike	48 min
Jun 10, 5:49 PM CDT	Tornado Warning	LSX	Lewis	41 min
Jun 10, 6:53 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe	52 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.