Alert archive / Missouri / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 39, NWS St. Louis, MO

May 8, 20094 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 8, 2009, 7:51 AM CDT for 4 counties in Missouri. It was in force for 39 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: May 8, 2009, 7:51 AM CDT (12:51 UTC)
Expired: May 8, 2009, 8:30 AM CDT
In force: 39 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Crawford County, MO, Franklin County, MO, Gasconade County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 12:53 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
May 8, 7:58 AM CDT	HAIL 1.5	5 S Bland, MO
May 8, 8:00 AM CDT	HAIL 1.75	7 Sse Bland, MO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 0.9 hours before the alert went out and 247 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: 3210 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 556 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 256 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 081251
SVRLSX
MOC055-071-073-151-081330-
/O.NEW.KLSX.SV.W.0039.090508T1251Z-090508T1330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
751 AM CDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHWESTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHEASTERN OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 830 AM CDT

* AT 749 AM 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
  BELLE...OR 11 MILES SOUTHWEST OF OWENSVILLE...AND MOVING EAST AT 30
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  OWENSVILLE...BLAND...ROSEBUD...GERALD...CANAAN...OAK HILL AND
  JAPAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
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 3838 9182 3841 9127 3814 9129 3818 9166
      3828 9166 3829 9183
TIME...MOT...LOC 1252Z 271DEG 27KT 3827 9165

$$

TES

2 follow-up statements

000 
WWUS53 KLSX 081317
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
817 AM CDT FRI MAY 8 2009

MOC151-081324-
/O.CAN.KLSX.SV.W.0039.000000T0000Z-090508T1330Z/
OSAGE MO-
817 AM CDT FRI MAY 8 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OSAGE COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM HAS MOVED OUT OF OSAGE COUNTY...SO THE 
WARNING HAS BEEN CANCELLED.

LAT...LON 3839 9165 3841 9127 3814 9129 3818 9164
      3818 9165
TIME...MOT...LOC 1314Z 272DEG 16KT 3827 9142

$$

MOC055-071-073-081330-
/O.CON.KLSX.SV.W.0039.000000T0000Z-090508T1330Z/
CRAWFORD MO-FRANKLIN MO-GASCONADE MO-
817 AM CDT FRI MAY 8 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR GASCONADE...SOUTHWESTERN FRANKLIN AND NORTHWESTERN CRAWFORD
COUNTIES...

AT 812 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR OAK HILL...OR 7 MILES SOUTHEAST OF OWENSVILLE...MOVING EAST AT 
20 MPH.

LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE JAPAN AND 
GERALD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
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.

GOLFBALL SIZE HAIL HAS BEEN REPORTED 5 MILES SOUTH OF BLAND AND ALSO 
7 MILES SOUTH SOUTHEAST OF BLAND AT 8 AM WITH THIS STORM. IF YOU ARE 
IN THE PATH OF THE STORM...SEEK SAFE SHELTER IN A STURDY BUILDING 
AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3839 9165 3841 9127 3814 9129 3818 9164
      3818 9165
TIME...MOT...LOC 1314Z 272DEG 16KT 3827 9142

$$

BRITT

000 
WWUS53 KLSX 081328
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
828 AM CDT FRI MAY 8 2009

MOC055-071-073-081338-
/O.EXP.KLSX.SV.W.0039.000000T0000Z-090508T1330Z/
CRAWFORD MO-FRANKLIN MO-GASCONADE MO-
828 AM CDT FRI MAY 8 2009

...THE SEVERE THUNDERSTORM WARNING FOR GASCONADE...SOUTHWESTERN
FRANKLIN AND NORTHWESTERN CRAWFORD COUNTIES EXPIRES AT 830 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER 
APPEARED TO BE SEVERE.  THE THUNDERSTORMS WILL STILL BE CAPABLE OF 
PRODUCING HAIL UP TO PENNY SIZE AS IT MOVES INTO SOUTHERN FRANKLIN 
COUNTY THROUGH 9 AM.

LAT...LON 3839 9165 3841 9127 3814 9129 3818 9164
      3818 9165
TIME...MOT...LOC 1328Z 272DEG 16KT 3827 9134

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 10:04 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Moniteau	56 min
May 7, 10:26 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	47 min
May 7, 10:52 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	53 min
May 7, 11:20 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Osage	55 min
May 7, 11:36 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	54 min
May 7, 11:38 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	57 min
May 8, 12:07 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau	38 min
May 8, 12:15 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Gasconade, Washington	30 min
May 8, 12:32 AM CDT	Tornado Warning	LSX	Crawford, Washington	28 min
May 8, 12:58 AM CDT	Tornado Warning	LSX	Crawford, Iron, Saint Francois, Washington	37 min
May 8, 1:29 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois	46 min
May 8, 8:06 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin	39 min
May 8, 8:38 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Washington	37 min
May 8, 9:01 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Washington	44 min
May 8, 9:12 AM CDT	Flash Flood Warning	LSX	Osage	5 hr
May 8, 9:37 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Francois, Washington	38 min
May 8, 9:53 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	52 min
May 8, 10:01 AM CDT	Flash Flood Warning	LSX	Crawford, Gasconade	6 hr
May 8, 10:02 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	43 min
May 8, 10:32 AM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Francois, Washington	43 min
May 8, 10:47 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds	58 min
May 8, 11:01 AM CDT	Flash Flood Warning	LSX	Iron, Jefferson, Sainte Genevieve, Saint Francois, Washington	6 hr
May 8, 11:12 AM CDT	Severe Thunderstorm Warning	LSX	Washington	33 min
May 8, 11:31 AM CDT	Tornado Warning	LSX	Iron, Madison, Saint Francois, Washington	29 min
May 8, 11:45 AM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	45 min
May 8, 12:05 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Francois	40 min
May 8, 12:18 PM CDT	River Flood Warning	LSX	Osage	20 hr
May 8, 12:18 PM CDT	River Flood Warning	LSX	Cole	28 hr
May 8, 12:27 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	50 min
May 8, 12:31 PM CDT	Tornado Warning	LSX	Madison	15 min
May 8, 3:51 PM CDT	Areal Flood Warning	LSX	Crawford, Gasconade	12 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2009 Every severe thunderstorm warning in 2009

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.