Alert archive / Illinois / Tornado Warnings in 2007

Tornado Warning 8, NWS St. Louis, MO

April 3, 2007Washington County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 3, 2007, 1:15 PM CDT for Washington County, Illinois. It was in force for 45 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 3, 2007, 1:15 PM CDT (18:15 UTC)
Expired
Apr 3, 2007, 2:00 PM CDT
In force
45 min
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

County Washington County, IL

The radar

The St Louis radar (KLSX), 109 km from the middle of the area, began a volume at 18:17 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 3, 9:48 AM CDTSevere Thunderstorm WatchSPC6 hr
Apr 3, 11:51 AM CDTTornado WatchSPC8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.3 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, Lincoln, IL at 12:00Z on 2007-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 joules per kilogram.LCLLFCEL10008507005003002001001 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 2007-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 210 square meters per square second.193958Sfc1 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
32 J/kg
Mixed-layer CIN
-399 J/kg
Mixed-layer LCL
1864 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
210 m²/s²
0-3 km storm-relative helicity
221 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.

000 
WFUS53 KLSX 031815
TORLSX
ILC189-031900-
/O.NEW.KLSX.TO.W.0008.070403T1815Z-070403T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
115 PM CDT TUE APR 3 2007

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 200 PM CDT

* AT 112 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 8 MILES WEST OF
  OKAWVILLE...OR ABOUT 9 MILES SOUTH OF NEW BADEN...MOVING EAST AT 35
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  OKAWVILLE...
  NASHVILLE...
  IRVINGTON...
  ASHLEY...

THIS TORNADO WARNING IS AN UPGRADE TO THE SEVERE THUNDERSTORM WARNING
PREVIOUSLY ISSUED FOR THE WARNED AREA.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

LAT...LON 3848 8970 3834 8972 3828 8915 3847 8916

$$

TES

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 8:57 AM CDTSevere Thunderstorm WarningLSXPike48 min
Apr 3, 9:48 AM CDTSevere Thunderstorm WarningLSXCalhoun42 min
Apr 3, 11:23 AM CDTSevere Thunderstorm WarningLSXMadison52 min
Apr 3, 11:54 AM CDTSevere Thunderstorm WarningLSXBond, Montgomery66 min
Apr 3, 12:18 PM CDTSevere Thunderstorm WarningLSXBond, Clinton, Madison42 min
Apr 3, 12:39 PM CDTSevere Thunderstorm WarningLSXSaint Clair, Washington51 min
Apr 3, 12:52 PM CDTSevere Thunderstorm WarningLSXFayette, Marion38 min
Apr 3, 1:01 PM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair44 min
Apr 3, 1:04 PM CDTSevere Thunderstorm WarningLSXClinton41 min
Apr 3, 1:29 PM CDTSevere Thunderstorm WarningLSXClinton, Fayette, Marion61 min
Apr 3, 1:34 PM CDTSevere Thunderstorm WarningLSXSaint Clair41 min
Apr 3, 1:40 PM CDTSevere Thunderstorm WarningLSXMadison50 min
Apr 3, 1:48 PM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair42 min
Apr 3, 2:03 PM CDTSevere Thunderstorm WarningLSXWashington42 min
Apr 3, 2:08 PM CDTSevere Thunderstorm WarningLSXMonroe, Randolph, Saint Clair52 min
Apr 3, 2:21 PM CDTSevere Thunderstorm WarningLSXRandolph39 min
Apr 3, 2:29 PM CDTSevere Thunderstorm WarningLSXBond, Madison33 min
Apr 3, 2:30 PM CDTSevere Thunderstorm WarningLSXMadison45 min
Apr 3, 2:42 PM CDTSevere Thunderstorm WarningLSXMarion33 min
Apr 3, 2:47 PM CDTSevere Thunderstorm WarningLSXWashington28 min
Apr 3, 2:51 PM CDTSevere Thunderstorm WarningLSXMadison24 min
Apr 3, 2:59 PM CDTSevere Thunderstorm WarningLSXRandolph46 min
Apr 3, 3:15 PM CDTSevere Thunderstorm WarningLSXBond, Clinton, Madison22 min
Apr 3, 3:37 PM CDTSevere Thunderstorm WarningLSXRandolph42 min

Nearby

Tornado Warnings in Illinois, 2007Every tornado warning in 2007Tornadoes in 2007

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.