Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 8, NWS St. Louis, MO

February 27, 2011Audrain County, Pike County, Ralls County, Missouri; Adams County, Pike County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 27, 2011, 9:50 PM CST for Audrain County, Pike County, Ralls County, Missouri; Adams County, Pike County, Illinois. It was in force for 40 min. 13 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
Feb 27, 2011, 9:50 PM CST (03:50 UTC)
Expired
Feb 27, 2011, 10:30 PM CST
In force
40 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
70.0 mph

Counties Adams County, IL, Pike County, IL, Audrain County, MO, Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 115 km from the middle of the area, began a volume at 03:54 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

TimeReportWhereRemark
Feb 27, 9:50 PM CSTTSTM WND DMG5 Se Perry, MOEXTENSIVE ROOF DAMAGE TO A HOME ON HWY Y
Feb 27, 9:50 PM CSTTSTM WND DMGPerry, MOROOF PARTIALLY REMOVED FROM HOUSE.
Feb 27, 9:50 PM CSTTSTM WND GST 0Perry, MOWINDS SOUNDED VERY STRONG...NO DAMAGE VISIBLE AT THIS TIME
Feb 27, 9:50 PM CSTHAIL 0.25Perry, MOWINDS SOUNDED VERY STRONG...NO DAMAGE VISIBLE AT THIS TIME
Feb 27, 10:00 PM CSTTSTM WND GST 601 S Frankford, MOSPOTTER ESTIMATES WINDS WERE AT LEAST 60 MPH WITH TREES UPROOTED...SHINGLES TORE OFF OF HOME...TIN RIPPED FROM BARN ROOFS AND PEA SIZE HAIL 1 INCH DEEP
Feb 27, 10:05 PM CSTHAIL 1Frankford, MO
Feb 27, 10:06 PM CSTTSTM WND DMGFrankford, MO1 FT DIAMETER TREES KNOCKED DOWN...SHEDS DAMAGED
Feb 27, 10:06 PM CSTHAIL 0.25Frankford, MOHAIL COVERING THE GROUND
Feb 27, 10:12 PM CSTHAIL 0Frankford, MOUNKNOWN SIZE HAIL COMPLETELY COVERING THE GROUND.
Feb 27, 10:15 PM CSTHAIL 0.7Curryville, MO
Feb 27, 10:16 PM CSTTSTM WND GST 60Ashburn, MO
Feb 27, 10:16 PM CSTHAIL 0.25Ashburn, MO
Feb 27, 10:35 PM CSTHAIL 1Frankford, 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.

IssuedProductOfficeLasted
Feb 27, 5:33 PM CSTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.8 hours before the alert went out and 233 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2011-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2011-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
485 m above ground
0-6 km bulk shear
86 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
136 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.

091 
WUUS53 KLSX 280350
SVRLSX
ILC001-149-MOC007-163-173-280430-
/O.NEW.KLSX.SV.W.0008.110228T0350Z-110228T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
950 PM CST SUN FEB 27 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHEASTERN AUDRAIN COUNTY IN CENTRAL MISSOURI...
  NORTHERN PIKE COUNTY IN NORTHEAST MISSOURI...
  RALLS COUNTY IN NORTHEAST MISSOURI...

* UNTIL 1030 PM CST

* AT 945 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR PERRY...OR 8 MILES
  NORTHWEST OF VANDALIA...AND MOVING NORTHEAST AT 55 MPH. PENNY SIZE
  HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...PITTSFIELD...CENTER...SPENCERBURG...CURRYVILLE...NEW
  LONDON...FRANKFORD...PIKE...ATLAS...BARRY...PLEASANT HILL...
  BEVERLY...ILASCO...SAVERTON...ASHBURN...HULL...KINDERHOOK...NEW
  CANTON...ROCKPORT AND EL DARA.

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 3987 9098 3947 9070 3925 9160 3948 9172
      3950 9172 3969 9134 3969 9132 3970 9132
TIME...MOT...LOC 0350Z 245DEG 49KT 3942 9153
WIND...HAIL 70MPH 0.75IN

$$

BRITT
3 follow-up statements
371 
WWUS53 KLSX 280357
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
957 PM CST SUN FEB 27 2011

ILC001-149-MOC007-163-173-280430-
/O.CON.KLSX.SV.W.0008.000000T0000Z-110228T0430Z/
PIKE IL-ADAMS IL-AUDRAIN MO-PIKE MO-RALLS MO-
957 PM CST SUN FEB 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
ADAMS AND PIKE COUNTIES IN WEST CENTRAL ILLINOIS...AND NORTHEASTERN
AUDRAIN COUNTY IN CENTRAL MISSOURI...AND RALLS AND NORTHERN PIKE
COUNTIES IN NORTHEAST MISSOURI UNTIL 1030 PM CST...

AT 954 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
OF 70 MPH.  THIS STORM WAS LOCATED NEAR SPENCERBURG...OR 9 MILES
NORTH OF VANDALIA...MOVING NORTHEAST AT 55 MPH. PENNY SIZE HAIL MAY
ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...PITTSFIELD...NEW LONDON...FRANKFORD...PIKE...ATLAS...
  BARRY...PLEASANT HILL...BEVERLY...ILASCO...SAVERTON...ASHBURN...
  HULL...KINDERHOOK...NEW CANTON...ROCKPORT...EL DARA...SUMMER
  HILL...NEW HARTFORD AND KINGSTON.

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.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS 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.

&&

LAT...LON 3987 9098 3947 9070 3925 9160 3948 9172
      3950 9172 3969 9134 3969 9132 3970 9132
TIME...MOT...LOC 0358Z 245DEG 49KT 3947 9140
WIND...HAIL 70MPH 0.75IN

$$

BRITT
197 
WWUS53 KLSX 280409
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1009 PM CST SUN FEB 27 2011

MOC007-280419-
/O.CAN.KLSX.SV.W.0008.000000T0000Z-110228T0430Z/
AUDRAIN MO-
1009 PM CST SUN FEB 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN AUDRAIN COUNTY IS
CANCELLED...

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

LAT...LON 3947 9070 3929 9143 3932 9144 3932 9150
      3956 9159 3969 9134 3969 9132 3970 9132
      3987 9098
TIME...MOT...LOC 0409Z 245DEG 49KT 3953 9122

$$

ILC001-149-MOC163-173-280430-
/O.CON.KLSX.SV.W.0008.000000T0000Z-110228T0430Z/
PIKE IL-ADAMS IL-PIKE MO-RALLS MO-
1009 PM CST SUN FEB 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
ADAMS AND PIKE COUNTIES IN WEST CENTRAL ILLINOIS...AND EASTERN RALLS
AND NORTHERN PIKE COUNTIES IN NORTHEAST MISSOURI UNTIL 1030 PM CST...

AT 1006 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
OF 70 MPH.  THIS STORM WAS LOCATED NEAR FRANKFORD...OR 12 MILES
NORTHWEST OF LOUISIANA...MOVING NORTHEAST AT 55 MPH. PENNY SIZE HAIL
MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...PITTSFIELD...PIKE...ATLAS...BARRY...PLEASANT HILL...
  BEVERLY...SAVERTON...ASHBURN...HULL...KINDERHOOK...NEW CANTON...
  ROCKPORT...EL DARA...SUMMER HILL...NEW HARTFORD...KINGSTON...
  MARTINSBURG...BAYLIS AND INDEPENDENCE.

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.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS 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.

&&

LAT...LON 3947 9070 3929 9143 3932 9144 3932 9150
      3956 9159 3969 9134 3969 9132 3970 9132
      3987 9098
TIME...MOT...LOC 0409Z 245DEG 49KT 3953 9122
WIND...HAIL 70MPH 0.75IN

$$

BRITT
349 
WWUS53 KLSX 280434
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1034 PM CST SUN FEB 27 2011

ILC001-149-MOC163-173-280443-
/O.EXP.KLSX.SV.W.0008.000000T0000Z-110228T0430Z/
PIKE IL-ADAMS IL-PIKE MO-RALLS MO-
1034 PM CST SUN FEB 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ADAMS AND PIKE
COUNTIES IN WEST CENTRAL ILLINOIS...AND EASTERN RALLS AND NORTHERN
PIKE COUNTIES IN NORTHEAST MISSOURI HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA INTO EASTERN PIKE COUNTY ILLINOIS.  HOWEVER HEAVY RAIN IS STILL 
POSSIBLE WITH THUNDERSTORMS LATE THIS EVENING.

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 3947 9070 3929 9143 3932 9144 3932 9150
      3956 9159 3969 9134 3969 9132 3970 9132
      3987 9098
TIME...MOT...LOC 0409Z 245DEG 49KT 3953 9122

$$

GKS

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 27, 6:26 PM CSTSevere Thunderstorm WarningLSXLewis, Marion49 min
Feb 27, 6:57 PM CSTSevere Thunderstorm WarningLSXLewis, Marion15 min
Feb 27, 7:38 PM CSTSevere Thunderstorm WarningLSXMarion, Ralls37 min
Feb 27, 8:02 PM CSTTornado WarningLSXPike28 min
Feb 27, 8:13 PM CSTAreal Flood AdvisoryLSXMarion4 hr
Feb 27, 8:25 PM CSTSevere Thunderstorm WarningLSXPike35 min
Feb 27, 9:54 PM CSTTornado WarningLSXCole, Gasconade, Osage36 min
Feb 27, 10:19 PM CSTTornado WarningLSXFranklin, Gasconade, Warren41 min
Feb 27, 10:25 PM CSTTornado WarningLSXFranklin, Gasconade50 min
Feb 27, 10:47 PM CSTTornado WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis, Warren, City of Saint Louis43 min
Feb 27, 11:05 PM CSTRiver Flood WarningLSXMarion35 hr
Feb 27, 11:11 PM CSTRiver Flood WarningLSXLincoln35 hr
Feb 27, 11:11 PM CSTRiver Flood WarningLSXMarion35 hr
Feb 27, 11:11 PM CSTRiver Flood WarningLSXMonroe4 days
Feb 27, 11:18 PM CSTTornado WarningLSXJefferson, Saint Charles, Saint Louis, City of Saint Louis42 min
Feb 27, 11:47 PM CSTSevere Thunderstorm WarningLSXCrawford21 min
Feb 28, 12:06 AM CSTSevere Thunderstorm WarningLSXWashington39 min
Feb 28, 12:18 AM CSTTornado WarningLSXIron, Reynolds42 min
Feb 28, 12:23 AM CSTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois52 min
Feb 28, 12:44 AM CSTTornado WarningLSXIron, Madison, Sainte Genevieve, Saint Francois46 min
Feb 28, 2:19 AM CSTRiver Flood WarningLSXSaint Charles4 days
Feb 28, 6:46 AM CSTRiver Flood WarningLSXMarion29 hr
Feb 28, 6:46 AM CSTRiver Flood WarningLSXPike38 hr
Feb 28, 6:46 AM CSTRiver Flood WarningLSXPike52 hr
Feb 28, 10:38 AM CSTRiver Flood WarningLSXGasconade, Montgomery4 days
Feb 28, 11:43 AM CSTRiver Flood WarningLSXLincoln47 hr
Feb 27, 8:14 PM CSTSevere Thunderstorm WarningLSXBrown16 min
Feb 27, 10:30 PM CSTSevere Thunderstorm WarningLSXPike18 min
Feb 27, 11:43 PM CSTTornado WarningLSXBond, Clinton, Fayette, Madison, Saint Clair, Washington47 min
Feb 28, 12:07 AM CSTTornado WarningLSXBond, Clinton, Fayette, Marion, Washington38 min
Feb 28, 11:14 AM CSTRiver Flood WarningLSXMorgan, Pike17 days

Nearby

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