Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS St. Louis, MO

February 27, 2011Lewis County, Marion County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 27, 2011, 6:57 PM CST for Lewis County, Marion County, Missouri. It was in force for 15 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
Feb 27, 2011, 6:57 PM CST (00:57 UTC)
Expired
Feb 27, 2011, 7:12 PM CST
In force
15 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Lewis County, MO, Marion County, MO

The radar

The St Louis radar (KLSX), 151 km from the middle of the area, began a volume at 00:59 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, 7:01 PM CSTHAIL 0.256 Nnw Palmyra, MO
Feb 27, 7:09 PM CSTHAIL 0.25Taylor, 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, 1.0 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-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.

144 
WUUS53 KLSX 280057
SVRLSX
MOC111-127-280130-
/O.NEW.KLSX.SV.W.0004.110228T0057Z-110228T0130Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LEWIS COUNTY IN NORTHEAST MISSOURI...
  CENTRAL MARION COUNTY IN NORTHEAST MISSOURI...

* UNTIL 730 PM CST

* AT 655 PM CST...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
  PALMYRA...AND MOVING NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TAYLOR.

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 4000 9149 3993 9143 3991 9143 3988 9145
      3987 9145 3983 9142 3974 9152 3987 9170
      4004 9150
TIME...MOT...LOC 0057Z 223DEG 56KT 3987 9153
WIND...HAIL 60MPH 1.00IN

$$

CARNEY
1 follow-up statement
770 
WWUS53 KLSX 280112
SVSLSX

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

MOC111-127-280122-
/O.CAN.KLSX.SV.W.0004.000000T0000Z-110228T0130Z/
MARION MO-LEWIS MO-
712 PM CST SUN FEB 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LEWIS AND EASTERN
MARION COUNTIES IS CANCELLED...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM.

LAT...LON 4000 9149 3993 9143 3991 9143 3988 9145
      3987 9145 3983 9142 3974 9152 3987 9170
      4004 9150
TIME...MOT...LOC 0112Z 223DEG 56KT 4004 9132

$$

CARNEY

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, 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, 9:50 PM CSTSevere Thunderstorm WarningLSXAudrain, Pike, Ralls40 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

Nearby

Severe Thunderstorm Warnings in Missouri, 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.