Alert archive / Indiana / Tornado Warnings in 2008

Tornado Warning 28, NWS Indianapolis, IN

September 12, 2008Knox County, Indiana

NWS Indianapolis, IN issued this tornado warning at Sep 12, 2008, 6:57 PM EDT for Knox County, Indiana. It was in force for 34 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
Sep 12, 2008, 6:57 PM EDT (22:57 UTC)
Expired
Sep 12, 2008, 7:31 PM EDT
In force
34 min
Issued by
NWS Indianapolis, IN
Area
Storm-based polygon

County Knox County, IN

The radar

The Evansville,IN radar (KVWX), 60 km from the middle of the area, began a volume at 23:08 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 185 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 2008-09-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 124 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2008-09-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
124 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KIND 122257
TORIND
INC083-122345-
/O.NEW.KIND.TO.W.0028.080912T2257Z-080912T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
657 PM EDT FRI SEP 12 2008

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL KNOX COUNTY IN SOUTHWEST INDIANA...

* UNTIL 745 PM EDT

* AT 655 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  SOUTHWEST OF BRUCEVILLE...OR NEAR VINCENNES...MOVING EAST AT 31
  MPH.

* THE TORNADO WILL BE NEAR...
  BRUCEVILLE BY 705 PM EDT...
  BICKNELL BY 715 PM EDT...

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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3876 8751 3887 8727 3867 8733 3868 8753
TIME...MOT...LOC 2257Z 251DEG 27KT 3871 8748

$$
2 follow-up statements
000 
WWUS53 KIND 122313
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
713 PM EDT FRI SEP 12 2008

INC083-122345-
/O.CON.KIND.TO.W.0028.000000T0000Z-080912T2345Z/
KNOX-
713 PM EDT FRI SEP 12 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR CENTRAL
KNOX COUNTY...

AT 708 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR BRUCEVILLE...OR 6
MILES NORTHEAST OF VINCENNES...MOVING EAST AT 27 MPH.

THE TORNADO WILL BE NEAR...
  BICKNELL BY 720 PM EDT...

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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3876 8751 3887 8727 3867 8733 3868 8753
TIME...MOT...LOC 2313Z 253DEG 23KT 3874 8737

$$
000 
WWUS53 KIND 122331
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
731 PM EDT FRI SEP 12 2008

INC083-122342-
/O.CAN.KIND.TO.W.0028.000000T0000Z-080912T2345Z/
KNOX-
732 PM EDT FRI SEP 12 2008

...THE TORNADO WARNING FOR CENTRAL KNOX COUNTY IS CANCELLED...

LAT...LON 3876 8751 3887 8727 3867 8733 3868 8753
TIME...MOT...LOC 2332Z 253DEG 23KT 3878 8722

$$

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 12, 9:48 AM EDTAreal Flood WarningINDDaviess2 hr
Sep 12, 6:52 PM EDTSevere Thunderstorm WarningINDGreene, Lawrence, Martin, Monroe38 min
Sep 12, 6:54 PM EDTSevere Thunderstorm WarningINDKnox51 min
Sep 12, 7:06 PM EDTTornado WarningINDGreene, Lawrence, Monroe39 min
Sep 12, 7:42 PM EDTSevere Thunderstorm WarningINDJackson, Lawrence, Monroe48 min

Nearby

Tornado Warnings in Indiana, 2008Every tornado warning in 2008Tornadoes in 2008

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.