Alert archive / Illinois / Tornado Watches in 2006

Tornado Watch 6

January 2, 200618 counties in Illinois; 15 counties in Indiana

The Storm Prediction Center issued this tornado watch at Jan 2, 2006, 7:35 AM CST for 18 counties in Illinois; 15 counties in Indiana. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jan 2, 2006, 7:35 AM CST (13:35 UTC)
Expired
Jan 2, 2006, 12:00 PM CST
In force
4 hr
Issued by
the Storm Prediction Center
All 33 counties

Champaign County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Macon County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Shelby County, IL, Vermilion County, IL, Clay County, IN, Daviess County, IN, Fountain County, IN, Greene County, IN, Knox County, IN, Martin County, IN, Montgomery County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Sullivan County, IN, Tippecanoe County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN

The radar

The Lincoln radar (KILX), 129 km from the middle of the area, began a volume at 13:36 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.

Warnings issued inside it

2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 2, 9:15 AM CSTSevere Thunderstorm WarningILXClay32 min
Jan 2, 11:04 AM CSTSevere Thunderstorm WarningINDSullivan, Vigo41 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.6 hours before the alert went out and 83 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 2006-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 775 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 2006-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 253 square meters per square second.19395878Sfc1 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
775 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
841 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
253 m²/s²
0-3 km storm-relative helicity
239 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 021335
SEL6  
SPC WW 021335
ILZ000-INZ000-021800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 6
NWS STORM PREDICTION CENTER NORMAN OK
735 AM CST MON JAN 2 2006

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       EAST CENTRAL ILLINOIS
       WEST CENTRAL INDIANA

EFFECTIVE THIS MONDAY MORNING FROM 735 AM UNTIL NOON CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH OF SALEM ILLINOIS TO
35 MILES EAST NORTHEAST OF TERRE HAUTE INDIANA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU6).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 3...WW 4...WW 5...

DISCUSSION...BROKEN LINE OF STORMS WILL CONTINUE MOVING STEADILY
NEWD ACROSS WW INTO THE EARLY TO MID AFTERNOON.  VERY STEEP LAPSE
RATES AND EFFECTIVE BULK SHEAR AROUND 40 KT WILL SUPPORT AT LEAST
ELEVATED SUPERCELLS WITH ISOLATED LARGE HAIL.  AS SURFACE HEATING
AND NOSE OF GREATER INSTABILITY AXIS EXTENDS NWD INTO ERN IL/WRN IND
LATER THIS MORNING...STORMS WILL BE CAPABLE OF BECOMING SURFACE
BASED WITH INCREASED THREATS OF DAMAGING WINDS AND TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 23035.


...EVANS

400,0885 402,0864 384,0864 381,0885

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 1, 10:55 PM CSTTornado WatchSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more7 hr
Jan 2, 1:25 AM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Clinton and 14 more95 min
Jan 2, 2:15 AM CSTTornado WatchSPCBond, Calhoun, Christian, Clay, Clinton, Edwards and 25 more7 hr
Jan 2, 3:01 AM CSTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more59 min
Jan 2, 4:31 AM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 47 more59 min
Jan 2, 5:38 AM CSTTornado WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more6 hr
Jan 2, 7:14 AM CSTMesoscale DiscussionSPCBond, Cass, Champaign, Christian, Clark, Clay and 30 more31 min
Jan 2, 7:57 AM CSTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more93 min
Jan 2, 10:21 AM CSTMesoscale DiscussionSPCClark, Crawford, Edgar, Jasper, Lawrence, Richland and 1 more84 min
Jan 2, 11:30 AM CSTMesoscale DiscussionSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 32 more90 min
Jan 2, 11:59 AM CSTSevere Thunderstorm WatchSPCBartholomew, Boone, Brown, Clark, Clay, Crawford and 41 more7 hr
Jan 2, 12:28 PM CSTMesoscale DiscussionSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 21 more92 min
Jan 2, 2:53 PM CSTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clark, Clay, Crawford and 39 more97 min

Nearby

Tornado Watches in Illinois, 2006Tornado Watches in Indiana, 2006Every tornado watch in 2006

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.