Alert archive / Indiana / Tornado Warnings in 2017

Tornado Warning 15, NWS Indianapolis, IN

May 20, 2017Clinton County, Howard County, Indiana

NWS Indianapolis, IN issued this tornado warning at May 20, 2017, 8:34 PM EDT for Clinton County, Howard County, Indiana. It was in force for 26 min. 2 reports 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: May 20, 2017, 8:34 PM EDT (00:34 UTC)
Expired: May 20, 2017, 9:00 PM EDT
In force: 26 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

Counties Clinton County, IN, Howard County, IN

The radar

The Indianapolis radar (KIND), 77 km from the middle of the area, began a volume at 00:33 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
May 20, 8:45 PM EDT	TORNADO	1 Ne Forest, IN	DAMAGE TO STRUCTURES.
May 20, 8:45 PM EDT	TORNADO	Forest, IN	DAMAGE TO FIRE STATION AND POLE BARN. PATH LENGTH 0.1 MILES. PATH WIDTH 30 YARDS.

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

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.6 hours before the alert went out and 198 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1283 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

121 
WFUS53 KIND 210034
TORIND
INC023-067-210100-
/O.NEW.KIND.TO.W.0015.170521T0034Z-170521T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Indianapolis IN
834 PM EDT SAT MAY 20 2017

The National Weather Service in Indianapolis has issued a

* Tornado Warning for...
  Northeastern Clinton County in central Indiana...
  Southwestern Howard County in central Indiana...

* Until 900 PM EDT

* At 834 PM EDT, a confirmed tornado was located 7 miles northeast of
  Frankfort, moving northeast at 20 mph.

  HAZARD...Damaging tornado. 

  SOURCE...Weather spotters confirmed tornado. 

  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. 

* The tornado will be near...
  Russiaville around 900 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4050 8628 4040 8618 4040 8624 4036 8624
      4030 8637 4035 8642
TIME...MOT...LOC 0034Z 231DEG 17KT 4034 8638 

TORNADO...OBSERVED
HAIL...<.75IN

$$

PUMA

3 follow-up statements

593 
WWUS53 KIND 210042
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
842 PM EDT SAT MAY 20 2017

INC023-067-210100-
/O.CON.KIND.TO.W.0015.000000T0000Z-170521T0100Z/
Clinton IN-Howard IN-
842 PM EDT SAT MAY 20 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM EDT FOR
NORTHEASTERN CLINTON AND SOUTHWESTERN HOWARD COUNTIES...
    
At 841 PM EDT, a confirmed tornado was located 11 miles northeast of
Frankfort, moving northeast at 20 mph.

HAZARD...Damaging tornado. 

SOURCE...Weather spotters confirmed tornado. 

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 tornado will be near...
  Russiaville around 855 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4040 8618 4040 8624 4037 8627 4034 8634
      4038 8639 4049 8627
TIME...MOT...LOC 0041Z 232DEG 17KT 4037 8633 

TORNADO...OBSERVED
HAIL...<.75IN

$$

PUMA

635 
WWUS53 KIND 210051
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
851 PM EDT SAT MAY 20 2017

INC023-210100-
/O.CAN.KIND.TO.W.0015.000000T0000Z-170521T0100Z/
Clinton IN-
851 PM EDT SAT MAY 20 2017

...THE TORNADO WARNING FOR NORTHEASTERN CLINTON 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 4042 8620 4040 8623 4040 8626 4039 8629
      4039 8631 4043 8631 4049 8627
TIME...MOT...LOC 0050Z 231DEG 21KT 4041 8628 

$$

INC067-210100-
/O.CON.KIND.TO.W.0015.000000T0000Z-170521T0100Z/
Howard IN-
851 PM EDT SAT MAY 20 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM EDT FOR
SOUTHWESTERN HOWARD COUNTY...
        
At 850 PM EDT, a severe thunderstorm capable of producing a tornado
was located 9 miles southwest of Kokomo, moving northeast at 25 mph.

HAZARD...Tornado. 

SOURCE...Weather spotters reported a funnel cloud. 

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 tornadic thunderstorm will remain over mainly rural areas of
southwestern Howard County.

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 4042 8620 4040 8623 4040 8626 4039 8629
      4039 8631 4043 8631 4049 8627
TIME...MOT...LOC 0050Z 231DEG 21KT 4041 8628 

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

$$

PUMA

936 
WWUS53 KIND 210058
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
858 PM EDT SAT MAY 20 2017

INC067-210108-
/O.EXP.KIND.TO.W.0015.000000T0000Z-170521T0100Z/
Howard IN-
858 PM EDT SAT MAY 20 2017

...THE TORNADO WARNING FOR SOUTHWESTERN HOWARD COUNTY WILL EXPIRE AT
900 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 4042 8620 4040 8623 4040 8626 4039 8629
      4039 8631 4043 8631 4049 8627
TIME...MOT...LOC 0058Z 231DEG 17KT 4043 8625 

$$

PUMA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 9:02 PM EDT	Tornado Warning	IND	Howard	28 min
May 20, 10:25 PM EDT	Flash Flood Warning	IND	Howard	5 hr
May 20, 11:09 PM EDT	River Flood Warning	IND	Tippecanoe	61 hr
May 21, 11:10 AM EDT	River Flood Warning	IND	Clinton, Tippecanoe	24 hr

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.