Alert archive / Indiana / Tornado Warnings in 2017

Tornado Warning 9, NWS Indianapolis, IN

April 20, 20174 counties in Indiana

NWS Indianapolis, IN issued this tornado warning at Apr 20, 2017, 7:02 PM EDT for 4 counties in Indiana. It was in force for 28 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 20, 2017, 7:02 PM EDT (23:02 UTC)
Expired: Apr 20, 2017, 7:30 PM EDT
In force: 28 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Bartholomew County, IN, Brown County, IN, Jackson County, IN, Jennings County, IN

The radar

The Indianapolis radar (KIND), 95 km from the middle of the area, began a volume at 23:06 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.0 hours before the alert went out and 192 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: 234 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1148 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

621 
WFUS53 KIND 202302
TORIND
INC005-013-071-079-202330-
/O.NEW.KIND.TO.W.0009.170420T2302Z-170420T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Indianapolis IN
702 PM EDT THU APR 20 2017

The National Weather Service in Indianapolis has issued a

* Tornado Warning for...
  Southwestern Bartholomew County in central Indiana...
  Southeastern Brown County in south central Indiana...
  Northern Jackson County in south central Indiana...
  Southwestern Jennings County in southeastern Indiana...

* Until 730 PM EDT.

* At 701 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles northwest of Brownstown, or 14 miles west of
  Seymour, moving east at 35 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Waymansville around 710 PM EDT. 
  Brownstown around 715 PM EDT. 
  Cortland around 720 PM EDT. 
  Seymour and Jonesville around 725 PM EDT. 
  Hayden around 730 PM EDT. 

This includes Interstate 65 between mile markers 40 and 59.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3894 8627 3911 8620 3906 8567 3882 8574
      3882 8576 3881 8576 3881 8578 3882 8580
TIME...MOT...LOC 2301Z 282DEG 31KT 3901 8615 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

MK

1 follow-up statement

672 
WWUS53 KIND 202317
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
717 PM EDT THU APR 20 2017

INC013-202326-
/O.CAN.KIND.TO.W.0009.000000T0000Z-170420T2330Z/
Brown IN-
717 PM EDT THU APR 20 2017

...THE TORNADO WARNING FOR SOUTHEASTERN BROWN COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3896 8605 3909 8598 3906 8567 3882 8574
      3882 8576 3881 8576 3881 8578 3882 8580
TIME...MOT...LOC 2316Z 282DEG 31KT 3898 8598 

$$

INC005-071-079-202330-
/O.CON.KIND.TO.W.0009.000000T0000Z-170420T2330Z/
Bartholomew IN-Jackson IN-Jennings IN-
717 PM EDT THU APR 20 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR SOUTH
CENTRAL BARTHOLOMEW...NORTHEASTERN JACKSON AND SOUTHWESTERN JENNINGS
COUNTIES...
    
At 716 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Seymour, moving east at 35 mph.

HAZARD...Tornado and quarter size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Seymour and Jonesville around 725 PM EDT. 
  Hayden around 730 PM EDT. 

This includes Interstate 65 between mile markers 41 and 59.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3896 8605 3909 8598 3906 8567 3882 8574
      3882 8576 3881 8576 3881 8578 3882 8580
TIME...MOT...LOC 2316Z 282DEG 31KT 3898 8598 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

MK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 1:15 PM EDT	Special Weather Statement	IND	Tippecanoe	30 min
Apr 20, 3:21 PM EDT	Special Weather Statement	IND	Montgomery, Vermillion	24 min
Apr 20, 3:32 PM EDT	Special Weather Statement	IND	Tippecanoe	28 min
Apr 20, 3:42 PM EDT	Special Weather Statement	IND	Parke	33 min
Apr 20, 3:46 PM EDT	Special Weather Statement	IND	Montgomery	29 min
Apr 20, 4:07 PM EDT	Special Weather Statement	IND	Jackson	23 min
Apr 20, 4:15 PM EDT	Special Weather Statement	IND	Parke	30 min
Apr 20, 4:22 PM EDT	Severe Thunderstorm Warning	IND	Clay, Parke, Putnam, Vigo	23 min
Apr 20, 4:44 PM EDT	Severe Thunderstorm Warning	IND	Owen, Putnam	31 min
Apr 20, 5:03 PM EDT	Tornado Warning	IND	Hamilton, Madison	27 min
Apr 20, 5:12 PM EDT	Severe Thunderstorm Warning	IND	Johnson, Morgan	33 min
Apr 20, 7:31 PM EDT	Severe Thunderstorm Warning	IND	Jackson, Jennings	29 min

Nearby

Tornado Warnings in Indiana, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.