Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 412, NWS St. Louis, MO

June 27, 20116 counties in Missouri; Adams County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 27, 2011, 12:26 AM CDT for 6 counties in Missouri; Adams County, Illinois. It was in force for 49 min. 16 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 27, 2011, 12:26 AM CDT (05:26 UTC)
Expired: Jun 27, 2011, 1:15 AM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 80.0 mph

Counties Adams County, IL, Knox County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Ralls County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 169 km from the middle of the area, began a volume at 05:27 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

Time	Report	Where	Remark
Jun 27, 12:27 AM CDT	TSTM WND DMG	Edina, MO	TREES AND POWER LINES DOWN COUNTYWIDE...BETWEEN 1227 AM AND 1 AM.
Jun 27, 12:40 AM CDT	TSTM WND DMG	Edina, MO	UP TO THREE FOOT DIAMETER TREES DOWNED
Jun 27, 12:43 AM CDT	TSTM WND DMG	3 S Clarence, MO	3 FT DIAMETER TREES UPROOTED POWER LINES DOWN
Jun 27, 12:45 AM CDT	TSTM WND GST 70	Clarence, MO	TREES...TREE LIMBS AND POWER LINES DOWN THROUGHOUT TOWN...FROM CHIEL OF POLICE
Jun 27, 12:55 AM CDT	TSTM WND DMG	1 Ssw Shelbina, MO	THREE TO FIVE TREES BLOWN DOWN IN YARD. ONE TREE WAS AT LEAST 10 INCHES IN DIAMETER.
Jun 27, 12:55 AM CDT	TSTM WND DMG	Lewistown, MO	DAMAGE REPORTED ALL ACROSS LEWIS COUNTY...LARGE TREES DOWN...POWER LINES DOWN...MOBILE HOMES BLOWN OFF FOUNDATIONS.
Jun 27, 12:55 AM CDT	TSTM WND DMG	Shelbina, MO	STRONG WINDS LASTED FOR ABOUT 15 MINUTES. TREES TOPPED IN YARD...NUMEROUS LARGE TREE LIMBS BLOWN DOWN AROUND TOWN. SMALL METAL SHED DESTROYED...ONE LARGE LIMB THROUGH NEIGHBORS ROOF.
Jun 27, 1:03 AM CDT	TSTM WND GST 60	Lewistown, MO	ESTIMATED 50-60 WIND GUSTS...POWER IS OUT AS WELL.
Jun 27, 1:04 AM CDT	HAIL 0.25	Lewistown, MO	LOTS OF HEAVY RAIN AND STRONG WINDS.
Jun 27, 1:07 AM CDT	TSTM WND DMG	Lewistown, MO	5-6 INCH LIMBS DOWN...QUARTER SIZED HAIL.
Jun 27, 1:07 AM CDT	HAIL 1	Lewistown, MO	5-6 INCH LIMBS DOWN...QUARTER SIZED HAIL.
Jun 27, 1:14 AM CDT	TSTM WND DMG	Monroe City, MO	ROOF PARTIALLY BLOWN OFF OF A BUILDING NEAR POTTERFIELD TRUCKING ON U.S. HIGHWAY 24 36 EAST.
Jun 27, 1:15 AM CDT	TSTM WND GST 80	La Grange, MO	SEVERAL TREES UPROOTED AS WELL
Jun 27, 1:20 AM CDT	TSTM WND GST 62	Canton, MO	MEASURED AT LOCK AND DAM 20
Jun 27, 1:25 AM CDT	TSTM WND DMG	Palmyra, MO	SEVERAL LARGE TREES BLOWN DOWN IN TOWN.
Jun 27, 1:25 AM CDT	TSTM WND GST 80	2 Ssw Mendon, IL	SEVERAL TREES DOWNED AND POWER OUT

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 26, 6:55 PM CDT	Tornado Watch	SPC	7 hr
Jun 26, 7:12 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 5.4 hours before the alert went out and 208 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: 15 J/kg
Mixed-layer CIN: -398 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

951 
WUUS53 KLSX 270526
SVRLSX
ILC001-MOC103-111-127-137-173-205-270615-
/O.NEW.KLSX.SV.W.0412.110627T0526Z-110627T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1226 AM CDT MON JUN 27 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  KNOX COUNTY IN NORTHEAST MISSOURI...
  LEWIS COUNTY IN NORTHEAST MISSOURI...
  MARION COUNTY IN NORTHEAST MISSOURI...
  MONROE COUNTY IN NORTHEAST MISSOURI...
  NORTHWESTERN RALLS COUNTY IN NORTHEAST MISSOURI...
  SHELBY COUNTY IN NORTHEAST MISSOURI...

* UNTIL 115 AM CDT

* AT 1222 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM SOUTH GORIN TO 10 MILES
  SOUTHEAST OF MARCELINE...AND MOVING EAST AT 70 MPH.

  AT 1219 AM...NUMEROUS POWER LINES WERE REPORTED DOWNED IN THE 
  KIRKSVILLE AREA DUE TO HIGH WINDS.

* LOCATIONS IMPACTED INCLUDE...
  SHELBINA...CANTON...PARIS...MONROE CITY...QUINCY...PALMYRA...SANTA
  FE...HANNIBAL...COLONY...KNOX CITY...PLEVNA...LA BELLE...
  CLARENCE...LEWISTOWN...STEFFENVILLE...SHELBYVILLE...MAUD...
  WOODLAWN...EWING AND MADISON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR PARTS OF THE WARNED AREA. 
TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 
NOT IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND 
MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A 
BASEMENT OR SMALL INTERIOR ROOM.

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE 
ACROSS NORTH CENTRAL MISSOURI. THIS IS AN EXTREMELY DANGEROUS 
SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY 
FROM WINDOWS.

&&

LAT...LON 4031 9195 4026 9194 4025 9150 4020 9150
      4019 9091 4016 9091 3976 9131 3976 9137
      3971 9136 3934 9173 3935 9231 3995 9229
      3996 9235 4031 9234
TIME...MOT...LOC 0524Z 288DEG 60KT 4036 9199 3961 9276
WIND...HAIL 80MPH 1.00IN

$$

TRUETT

1 follow-up statement

934 
WWUS53 KLSX 270551
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1251 AM CDT MON JUN 27 2011

ILC001-MOC103-111-127-137-173-205-270615-
/O.CON.KLSX.SV.W.0412.000000T0000Z-110627T0615Z/
ADAMS IL-KNOX MO-LEWIS MO-MARION MO-MONROE MO-RALLS MO-SHELBY MO-
1251 AM CDT MON JUN 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SHELBY...
NORTHWESTERN RALLS...MONROE...MARION...LEWIS...KNOX AND ADAMS
COUNTIES UNTIL 115 AM CDT...

AT 1248 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM COLONY TO SHELBINA TO 
CLARK...MOVING EAST AT 60 MPH. 

WINDS OF UP TO 70 MPH HAVE BEEN REPORTED NEAR MACON WITH THIS LINE 
OF DANGEROUS THUNDERSTORMS.

LOCATIONS IMPACTED INCLUDE...
  PARIS...MONROE CITY...SANTA FE...CANTON...PALMYRA...QUINCY...
  HANNIBAL...STEFFENVILLE...EMDEN...LEWISTOWN...WARREN...
  PHILADELPHIA...EWING...MAYWOOD...LA GRANGE...RENSSELAER...PERRY...
  SPAULDING...MENDON AND FALL CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR PARTS OF THE WARNED AREA. 
TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 
NOT IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND 
MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A 
BASEMENT OR SMALL INTERIOR ROOM.

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS 
NORTH CENTRAL MISSOURI. THIS IS AN EXTREMELY DANGEROUS SITUATION. 
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS.

&&

LAT...LON 4031 9195 4026 9194 4025 9150 4020 9150
      4019 9091 4016 9091 3976 9131 3976 9137
      3971 9136 3934 9173 3935 9231 3995 9229
      3996 9235 4031 9234
TIME...MOT...LOC 0550Z 284DEG 48KT 4030 9190 3962 9199
          3928 9237
WIND...HAIL 80MPH 1.00IN

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 7:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	14 min
Jun 26, 7:26 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	38 min
Jun 26, 8:28 PM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	65 days
Jun 26, 8:30 PM CDT	Flash Flood Warning	LSX	Knox, Lewis	12 hr
Jun 26, 8:34 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis	41 min
Jun 26, 9:09 PM CDT	River Flood Warning	LSX	Lewis	4 days
Jun 26, 9:09 PM CDT	River Flood Warning	LSX	Marion	5 days
Jun 26, 9:16 PM CDT	Severe Thunderstorm Warning	LSX	Lewis	59 min
Jun 27, 12:11 AM CDT	Severe Thunderstorm Warning	LSX	Knox	19 min
Jun 27, 12:52 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Monroe, Montgomery, Pike and 1 more	53 min
Jun 27, 12:55 AM CDT	Tornado Warning	LSX	Marion, Monroe, Ralls, Shelby	20 min
Jun 27, 1:08 AM CDT	Tornado Warning	LSX	Marion, Monroe, Pike, Ralls	37 min
Jun 27, 1:13 AM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion	62 min
Jun 27, 1:27 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Lincoln, Montgomery, Pike, Saint Charles and 1 more	63 min
Jun 27, 1:43 AM CDT	Tornado Warning	LSX	Pike	32 min
Jun 27, 2:04 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis	41 min
Jun 27, 2:17 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Crawford, Franklin, Gasconade, Jefferson, Montgomery and 5 more	43 min
Jun 27, 2:42 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, City of Saint Louis	48 min
Jun 27, 3:01 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Francois, Washington	29 min
Jun 27, 3:14 AM CDT	River Flood Warning	LSX	Marion	4 days
Jun 27, 4:18 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau, Osage	23 min
Jun 27, 8:22 AM CDT	Areal Flood Warning	LSX	Knox, Lewis	12 hr
Jun 27, 8:25 AM CDT	River Flood Warning	LSX	Marion	4 days
Jun 27, 3:11 PM CDT	River Flood Warning	LSX	Franklin, Warren	22 days
Jun 27, 3:11 PM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	44 days
Jun 27, 5:19 PM CDT	River Flood Warning	LSX	Lincoln	18 hr
Jun 26, 9:45 PM CDT	River Flood Warning	LSX	Clinton	9 days
Jun 26, 10:09 PM CDT	Severe Thunderstorm Warning	LSX	Brown	36 min
Jun 26, 10:11 PM CDT	Flash Flood Warning	LSX	Adams, Brown	11 hr
Jun 27, 2:09 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	36 min
Jun 27, 8:57 AM CDT	Areal Flood Warning	LSX	Adams, Brown	12 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Severe Thunderstorm Warnings in Illinois, 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.