Alert archive / Illinois / Tornado Warnings in 2010

Tornado Warning 84, NWS St. Louis, MO

December 31, 2010Calhoun County, Pike County, Illinois; Lincoln County, Pike County, Missouri

NWS St. Louis, MO issued this tornado warning at Dec 31, 2010, 11:00 AM CST for Calhoun County, Pike County, Illinois; Lincoln County, Pike County, Missouri. It was in force for 60 min. 3 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
Dec 31, 2010, 11:00 AM CST (17:00 UTC)
Expired
Dec 31, 2010, 12:00 PM CST
In force
60 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon

Counties Calhoun County, IL, Pike County, IL, Lincoln County, MO, Pike County, MO

The radar

The St Louis radar (KLSX), 104 km from the middle of the area, began a volume at 17:00 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
Dec 31, 11:00 AM CSTHAIL 1Pittsfield, IL
Dec 31, 11:06 AM CSTHAIL 0.88Pittsfield, IL
Dec 31, 11:38 AM CSTHAIL 0.25Milton, IL

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
Dec 31, 7:29 AM CSTTornado WatchSPC8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.0 hours before the alert went out and 200 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, Lincoln, IL at 12:00Z on 2010-12-31Temperature 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, Lincoln, IL at 12:00Z on 2010-12-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 450 square meters per square second.1939587897Sfc1 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
506 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
450 m²/s²
0-3 km storm-relative helicity
427 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.

528 
WFUS53 KLSX 311700
TORLSX
ILC013-149-MOC113-163-311800-
/O.NEW.KLSX.TO.W.0084.101231T1700Z-101231T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1100 AM CST FRI DEC 31 2010

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHWESTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  PIKE COUNTY IN NORTHEAST MISSOURI...

* UNTIL NOON CST

* AT 1052 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  TWO SEVERE THUNDERSTORMS CAPABLE OF PRODUCING TORNADOES. THE FIRST
  STORM WAS LOCATED 5 MILES SOUTHWEST OF PITTSFIELD ILLINOIS. THE
  SECOND STORM   WAS LOCATED 5 MILES NORTHEAST OF NEW HARTFORD
  MISSOURI...OR 5 MILES SOUTH OF BOWLING GREEN MISSOURI. BOTH STORMS
  WERE MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...PITTSFIELD...EOLIA...PIKE...CLARKSVILLE...ATLAS...
  PLEASANT HILL...BELLEVIEW...GRIGGSVILLE...CYRENE...EDGEWOOD...
  ROCKPORT...SUMMER HILL...EL DARA...NEBO...NEW HARTFORD...
  MARTINSBURG...INDEPENDENCE...BEECREEK AND BAYLIS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3985 9060 3978 9061 3971 9064 3968 9064
      3965 9061 3939 9062 3915 9120 3918 9130
      3931 9133 3977 9097 3977 9092 3982 9092
      3984 9091
TIME...MOT...LOC 1657Z 233DEG 45KT 3930 9117

$$

MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 31, 9:43 AM CSTTornado WarningLSXAdams, Brown32 min
Dec 31, 10:22 AM CSTTornado WarningLSXPike38 min
Dec 31, 11:15 AM CSTTornado WarningLSXCalhoun, Pike45 min
Dec 31, 11:22 AM CSTTornado WarningLSXCalhoun, Jersey, Madison, Monroe, Saint Clair53 min
Dec 31, 11:54 AM CSTTornado WarningLSXCalhoun, Greene, Pike51 min
Dec 31, 11:59 AM CSTTornado WarningLSXBond, Clinton, Jersey, Macoupin, Madison, Monroe and 2 more61 min
Dec 31, 12:38 PM CSTTornado WarningLSXBond, Clinton, Fayette, Marion, Montgomery67 min
Dec 31, 12:57 PM CSTTornado WarningLSXBond, Clinton, Madison, Monroe, Randolph, Saint Clair and 1 more48 min
Dec 31, 1:11 PM CSTTornado WarningLSXRandolph49 min
Dec 31, 1:40 PM CSTTornado WarningLSXBond, Clinton, Fayette, Marion, Washington50 min
Dec 31, 1:44 PM CSTTornado WarningLSXClinton, Monroe, Randolph, Saint Clair, Washington61 min
Dec 31, 2:00 PM CSTTornado WarningLSXRandolph60 min
Dec 31, 2:22 PM CSTTornado WarningLSXBond, Clinton, Fayette, Marion, Washington53 min
Dec 31, 2:26 AM CSTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade, Osage49 min
Dec 31, 3:05 AM CSTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade40 min
Dec 31, 9:41 AM CSTSevere Thunderstorm WarningLSXCallaway34 min
Dec 31, 10:08 AM CSTTornado WarningLSXAudrain, Callaway, Montgomery, Pike37 min
Dec 31, 10:11 AM CSTTornado WarningLSXCrawford, Franklin, Gasconade64 min
Dec 31, 10:13 AM CSTTornado WarningLSXCrawford, Franklin, Washington62 min
Dec 31, 10:47 AM CSTTornado WarningLSXMontgomery, Pike13 min
Dec 31, 10:56 AM CSTTornado WarningLSXCrawford, Franklin, Jefferson, Saint Charles, Saint Louis, Warren and 1 more64 min
Dec 31, 12:29 PM CSTTornado WarningLSXJefferson, Sainte Genevieve, Saint Francois31 min

Nearby

Tornado Warnings in Illinois, 2010Tornado Warnings in Missouri, 2010Every tornado warning in 2010Tornadoes in 2010

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.