Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 274, NWS St. Louis, MO

September 7, 2012Crawford County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 7, 2012, 3:02 PM CDT for Crawford County, Missouri. It was in force for 43 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: Sep 7, 2012, 3:02 PM CDT (20:02 UTC)
Expired: Sep 7, 2012, 3:45 PM CDT
In force: 43 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Crawford County, MO

The radar

The St Louis radar (KLSX), 85 km from the middle of the area, began a volume at 20:03 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
Sep 7, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.0 hours before the alert went out and 262 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: 1095 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

593 
WUUS53 KLSX 072002
SVRLSX
MOC055-072045-
/O.NEW.KLSX.SV.W.0274.120907T2002Z-120907T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
302 PM CDT FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL AND NORTHEASTERN CRAWFORD COUNTY IN EAST CENTRAL 
  MISSOURI...

* UNTIL 345 PM CDT

* AT 259 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  STEELVILLE...AND MOVING NORTHEAST AT 25 MPH.

  HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
           DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

* LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL CRAWFORD COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3819 9117 3812 9109 3796 9110 3789 9131
      3795 9138
TIME...MOT...LOC 2002Z 236DEG 20KT 3796 9132

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

$$

TES

2 follow-up statements

693 
WWUS53 KLSX 072025
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
325 PM CDT FRI SEP 7 2012

MOC055-072045-
/O.CON.KLSX.SV.W.0274.000000T0000Z-120907T2045Z/
CRAWFORD MO-
325 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN 
AND CENTRAL CRAWFORD COUNTY UNTIL 345 PM CDT...

AT 320 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTHEAST
OF CHERRYVILLE...AND MOVING EAST AT 15 MPH.

HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
         DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EASTERN CRAWFORD COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3819 9117 3812 9109 3796 9110 3789 9131
      3795 9138
TIME...MOT...LOC 2025Z 264DEG 15KT 3793 9119

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

$$

TES

895 
WWUS53 KLSX 072044
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
344 PM CDT FRI SEP 7 2012

MOC055-072054-
/O.EXP.KLSX.SV.W.0274.000000T0000Z-120907T2045Z/
CRAWFORD MO-
344 PM CDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CRAWFORD COUNTY
WILL EXPIRE AT 345 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM 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 3819 9117 3812 9109 3796 9110 3789 9131
      3795 9138
TIME...MOT...LOC 2044Z 264DEG 15KT 3794 9109

$$

TES

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 3:18 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	42 min
Sep 7, 3:33 PM CDT	Severe Thunderstorm Warning	LSX	Boone	57 min
Sep 7, 3:36 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	54 min
Sep 7, 3:51 PM CDT	Severe Thunderstorm Warning	LSX	Washington	39 min
Sep 7, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Washington	35 min
Sep 7, 4:13 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	62 min
Sep 7, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	42 min
Sep 7, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Iron	51 min
Sep 7, 4:46 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	44 min
Sep 7, 4:50 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	40 min
Sep 7, 5:00 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	45 min
Sep 7, 5:03 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	42 min
Sep 7, 5:13 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds	32 min
Sep 7, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	30 min
Sep 7, 5:22 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	23 min
Sep 7, 5:24 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	31 min
Sep 7, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Osage	35 min
Sep 7, 5:49 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	41 min
Sep 7, 5:50 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	40 min
Sep 7, 6:00 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	30 min
Sep 7, 6:03 PM CDT	Areal Flood Advisory	LSX	Iron, Reynolds	6 hr
Sep 7, 6:22 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Washington	53 min
Sep 7, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds	49 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every severe thunderstorm warning in 2012

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.