Alert archive / Indiana / Tornado Watches in 2005

Tornado Watch 852

November 8, 200516 counties in Illinois; 24 counties in Indiana

The Storm Prediction Center issued this tornado watch at Nov 8, 2005, 6:10 PM CST for 16 counties in Illinois; 24 counties in Indiana. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Nov 8, 2005, 6:10 PM CST (00:10 UTC)
Expired: Nov 9, 2005, 1:03 AM CST
In force: 7 hr
Issued by: the Storm Prediction Center

All 40 counties

Bureau County, IL, Ford County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Kankakee County, IL, Knox County, IL, LaSalle County, IL, Livingston County, IL, Marshall County, IL, Peoria County, IL, Putnam County, IL, Stark County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Adams County, IN, Benton County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Madison County, IN, Miami County, IN, Newton County, IN, Pulaski County, IN, Randolph County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN

The radar

The Chicago radar (KLOT), 57 km from the middle of the area, began a volume at 00:07 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

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

Issued	Product	Office	Counties	Lasted
Nov 8, 7:40 PM CST	Severe Thunderstorm Warning	IWX	Blackford, Grant	65 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 00:00Z, 0.2 hours before the alert went out and 112 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 608 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1025 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 181 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 090010
SEL2  
SPC WW 090010
ILZ000-INZ000-090700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 852
NWS STORM PREDICTION CENTER NORMAN OK
610 PM CST TUE NOV 8 2005

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

       NORTHERN ILLINOIS
       NORTHERN INDIANA

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 610 PM
UNTIL 100 AM CST.

TORNADOES...HAIL TO 2 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 35 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 85 MILES WEST OF MARSEILLES
ILLINOIS TO 30 MILES EAST NORTHEAST OF MUNCIE INDIANA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

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.

DISCUSSION...THUNDERSTORMS ARE EXPECTED TO DEVELOP INVOF THE SURFACE
WARM FRONT ACROSS NRN IL/INDIANA THE NEXT FEW HOURS...AS EVIDENCED
BY THE RECENT CONVECTIVE DEVELOPMENT NEAR LAF. THE COMBINATION OF
MODERATE INSTABILITY AND GRADUALLY INCREASING VERTICAL SHEAR WILL
SUPPORT A THREAT FOR SUPERCELL NEAR THE WARM FRONT...WITH SOME
THREAT FOR SURFACE-BASED STORMS AND TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 28030.


...THOMPSON

415,0901 405,0845 395,0845 405,0901

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 8, 6:35 PM CST	Severe Thunderstorm Watch	SPC	Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more	8 hr
Nov 8, 9:08 PM CST	Mesoscale Discussion	SPC	Bureau, Ford, Grundy, Henry, Iroquois, Kankakee and 9 more	97 min
Nov 8, 9:25 PM CST	Mesoscale Discussion	SPC	Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more	2 hr
Nov 8, 11:29 PM CST	Mesoscale Discussion	SPC	Steuben	91 min
Nov 9, 2:31 PM CST	Mesoscale Discussion	SPC	Switzerland	119 min

Nearby

Tornado Watches in Indiana, 2005 Tornado Watches in Illinois, 2005 Every tornado watch in 2005

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.