Alert archive / Indiana / Tornado Warnings in 2017

Tornado Warning 8, NWS Indianapolis, IN

April 20, 2017Hamilton County, Madison County, Indiana

NWS Indianapolis, IN issued this tornado warning at Apr 20, 2017, 5:03 PM EDT for Hamilton County, Madison County, Indiana. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2017, 5:03 PM EDT (21:03 UTC)
Expired: Apr 20, 2017, 5:30 PM EDT
In force: 27 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Hamilton County, IN, Madison County, IN

The radar

The Indianapolis radar (KIND), 62 km from the middle of the area, began a volume at 21:02 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.

What was reported inside it

Time	Report	Where	Remark
Apr 20, 5:37 PM EDT	HAIL 0.25	2 Se Anderson, IN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.1 hours before the alert went out and 182 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.

885 
WFUS53 KIND 202103
TORIND
INC057-095-202130-
/O.NEW.KIND.TO.W.0008.170420T2103Z-170420T2130Z/

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

The National Weather Service in Indianapolis has issued a

* Tornado Warning for...
  Southern Madison County in central Indiana...
  Northeastern Hamilton County in central Indiana...

* Until 530 PM EDT.

* At 503 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Noblesville, or 15 miles west of Anderson, moving
  east at 35 mph.

  HAZARD...Tornado. 

  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...
  Lapel around 515 PM EDT. 
  Pendleton and Edgewood around 525 PM EDT. 
  Anderson, Chesterfield, Woodlawn Heights, Country Club Heights and 
  River Forest around 530 PM EDT. 

This includes Interstate 69 between mile markers 214 and 229.
 
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 4012 8558 3995 8563 3994 8571 4009 8615
      4020 8603 4023 8558
TIME...MOT...LOC 2103Z 272DEG 29KT 4012 8598 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MK

2 follow-up statements

137 
WWUS53 KIND 202121
SVSIND

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

INC057-095-202130-
/O.CON.KIND.TO.W.0008.000000T0000Z-170420T2130Z/
Madison IN-Hamilton IN-
521 PM EDT THU APR 20 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR SOUTHERN
MADISON AND NORTHEASTERN HAMILTON COUNTIES...
    
At 520 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Anderson, moving east at 35 mph.

HAZARD...Tornado. 

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...
  River Forest around 525 PM EDT. 
  Anderson, Chesterfield, Country Club Heights and Woodlawn Heights 
  around 530 PM EDT. 

This includes Interstate 69 between mile markers 218 and 229.
 
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 4012 8558 3995 8563 3994 8571 4011 8596
      4020 8589 4023 8558
TIME...MOT...LOC 2120Z 267DEG 31KT 4013 8578 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MK

759 
WWUS53 KIND 202128
SVSIND

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

INC057-095-202138-
/O.EXP.KIND.TO.W.0008.000000T0000Z-170420T2130Z/
Madison IN-Hamilton IN-
528 PM EDT THU APR 20 2017

...THE TORNADO WARNING FOR SOUTHERN MADISON AND NORTHEASTERN HAMILTON
COUNTIES WILL EXPIRE AT 530 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Indianapolis.

LAT...LON 4012 8558 3995 8563 3994 8571 4011 8596
      4020 8589 4023 8558
TIME...MOT...LOC 2128Z 272DEG 29KT 4013 8571 

$$

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, 5:12 PM EDT	Severe Thunderstorm Warning	IND	Johnson, Morgan	33 min
Apr 20, 7:02 PM EDT	Tornado Warning	IND	Bartholomew, Brown, Jackson, Jennings	28 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.