Alert archive / Illinois / Tornado Warnings in 2010

Tornado Warning 11, NWS St. Louis, MO

April 4, 2010Macoupin County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 4, 2010, 9:55 PM CDT for Macoupin County, Illinois. It was in force for 35 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
Apr 4, 2010, 9:55 PM CDT (02:55 UTC)
Expired
Apr 4, 2010, 10:30 PM CDT
In force
35 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon

County Macoupin County, IL

The radar

The St Louis radar (KLSX), 75 km from the middle of the area, began a volume at 02:58 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.

IssuedProductOfficeLasted
Apr 4, 8:43 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.9 hours before the alert went out and 166 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 00:00Z on 2010-04-05Temperature 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 00:00Z on 2010-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 334 square meters per square second.1939587897117Sfc1 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
2143 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
334 m²/s²
0-3 km storm-relative helicity
480 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.

001 
WFUS53 KLSX 050255
TORLSX
ILC117-050330-
/O.NEW.KLSX.TO.W.0011.100405T0255Z-100405T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
955 PM CDT SUN APR 4 2010

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...

* UNTIL 1030 PM CDT

* AT 953 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR KEMPER...OR 11 MILES EAST OF JERSEYVILLE...
  AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CARLINVILLE...GILLESPIE...STAUNTON...SHIPMAN...BUNKER HILL...
  WILSONVILLE...BENLD...MOUNT OLIVE...CHESTERFIELD...PLAINVIEW...
  ROYAL LAKES...PRUETT...DORCHESTER...WHITE CITY AND HORNSBY.

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 3901 9015 3904 9016 3933 9015 3932 8971
      3900 8971
TIME...MOT...LOC 0255Z 269DEG 53KT 3916 9010

$$

BRITT
2 follow-up statements
308 
WWUS53 KLSX 050312
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1012 PM CDT SUN APR 4 2010

ILC117-050330-
/O.CON.KLSX.TO.W.0011.000000T0000Z-100405T0330Z/
MACOUPIN IL-
1012 PM CDT SUN APR 4 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN MACOUPIN COUNTY
UNTIL 1030 PM CDT...

AT 1009 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD 
EAST OF MEDORA.  A TORNADO MAY DEVELOP AT ANY TIME. THIS DANGEROUS 
STORM WAS LOCATED NEAR SHIPMAN...OR 12 MILES WEST OF GILLESPIE... 
MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  GILLESPIE...STAUNTON...BUNKER HILL...WILSONVILLE...BENLD...MOUNT
  OLIVE...PRUETT...DORCHESTER...WHITE CITY AND HORNSBY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 3904 9005 3910 9013 3927 9002 3928 8971
      3900 8971
TIME...MOT...LOC 0311Z 268DEG 40KT 3912 8997

$$

BRITT
709 
WWUS53 KLSX 050319
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1019 PM CDT SUN APR 4 2010

ILC117-050330-
/O.CON.KLSX.TO.W.0011.000000T0000Z-100405T0330Z/
MACOUPIN IL-
1019 PM CDT SUN APR 4 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN MACOUPIN COUNTY
UNTIL 1030 PM CDT...

AT 1015 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR WILSONVILLE...OR 5 MILES WEST OF GILLESPIE...
MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  GILLESPIE...BENLD...MOUNT OLIVE...WHITE CITY AND HORNSBY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.

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 3908 9004 3911 9005 3918 9001 3922 8971
      3900 8971
TIME...MOT...LOC 0319Z 268DEG 40KT 3912 8986

$$

BRITT

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 4, 8:34 PM CDTSevere Thunderstorm WarningLSXAdams, Brown, Pike26 min
Apr 4, 8:55 PM CDTTornado WarningLSXCalhoun35 min
Apr 4, 8:58 PM CDTSevere Thunderstorm WarningLSXPike32 min
Apr 4, 9:22 PM CDTSevere Thunderstorm WarningLSXGreene, Jersey38 min
Apr 4, 9:38 PM CDTTornado WarningLSXGreene, Jersey26 min
Apr 4, 9:50 PM CDTSevere Thunderstorm WarningLSXGreene, Pike40 min
Apr 4, 10:16 PM CDTTornado WarningLSXGreene, Macoupin29 min
Apr 4, 10:30 PM CDTSevere Thunderstorm WarningLSXBond, Macoupin, Montgomery45 min
Apr 4, 10:35 PM CDTTornado WarningLSXMacoupin40 min
Apr 4, 10:41 PM CDTSevere Thunderstorm WarningLSXCalhoun34 min
Apr 4, 10:48 PM CDTTornado WarningLSXMacoupin, Montgomery42 min
Apr 4, 11:13 PM CDTTornado WarningLSXJersey, Macoupin32 min
Apr 4, 11:29 PM CDTTornado WarningLSXMontgomery46 min
Apr 4, 11:51 PM CDTTornado WarningLSXFayette, Montgomery39 min
Apr 4, 11:54 PM CDTSevere Thunderstorm WarningLSXMadison36 min
Apr 5, 12:30 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Pike30 min
Apr 5, 2:50 PM CDTSevere Thunderstorm WarningLSXMacoupin, Madison, Montgomery40 min
Apr 5, 3:28 PM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery47 min
Apr 5, 4:07 PM CDTAreal Flood AdvisoryLSXMontgomery4 hr
Apr 5, 4:16 PM CDTTornado WarningLSXFayette, Montgomery32 min

Nearby

Tornado Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.