Alert archive / Indiana / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 55, NWS Indianapolis, IN

April 20, 2017Johnson County, Morgan County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 20, 2017, 5:12 PM EDT for Johnson County, Morgan County, Indiana. It was in force for 33 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, 5:12 PM EDT (21:12 UTC)
Expired: Apr 20, 2017, 5:45 PM EDT
In force: 33 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Johnson County, IN, Morgan County, IN

The radar

The Indianapolis radar (KIND), 33 km from the middle of the area, began a volume at 21:14 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, 5:43 PM EDT	HAIL 0.88	Martinsville, IN	REPORT ORIGINATED FROM TV VIEWER.

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 12:00Z, 9.2 hours before the alert went out and 189 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: 241 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1197 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 296 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

986 
WUUS53 KIND 202112
SVRIND
INC081-109-202145-
/O.NEW.KIND.SV.W.0055.170420T2112Z-170420T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
512 PM EDT THU APR 20 2017

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Morgan County in central Indiana...
  Southwestern Johnson County in central Indiana...

* Until 545 PM EDT.

* At 512 PM EDT, a severe thunderstorm was located 13 miles west of
  Martinsville, or 23 miles north of Bloomington, moving east at 35
  mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Martinsville, Mooresville, Brooklyn, Monrovia, Morgantown, Bethany,
  Lake Hart, Waverly, Little Point, Eminence and Centerton.

This includes Interstate 70 between mile markers 50 and 51.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3955 8666 3957 8665 3957 8666 3958 8658
      3960 8622 3934 8624 3934 8628 3943 8663
      3947 8663 3947 8669 3952 8669
TIME...MOT...LOC 2112Z 273DEG 29KT 3949 8665 

HAIL...1.00IN
WIND...60MPH
 
$$

MK

3 follow-up statements

456 
WWUS53 KIND 202126
SVSIND

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

INC081-109-202145-
/O.CON.KIND.SV.W.0055.000000T0000Z-170420T2145Z/
Morgan IN-Johnson IN-
526 PM EDT THU APR 20 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR MORGAN AND SOUTHWESTERN JOHNSON COUNTIES...

At 525 PM EDT, a severe thunderstorm was located near Martinsville,
or 21 miles north of Bloomington, moving east at 35 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Martinsville, Mooresville, Brooklyn, Monrovia, Morgantown, Bethany,
Lake Hart, Waverly and Centerton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3954 8659 3955 8658 3955 8656 3958 8652
      3960 8622 3934 8624 3934 8628 3943 8663
      3947 8660 3949 8658 3951 8658
TIME...MOT...LOC 2125Z 273DEG 29KT 3948 8651 

HAIL...1.50IN
WIND...60MPH
 
$$

MK

549 
WWUS53 KIND 202139
SVSIND

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

INC081-202149-
/O.CAN.KIND.SV.W.0055.000000T0000Z-170420T2145Z/
Johnson IN-
539 PM EDT THU APR 20 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN JOHNSON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3942 8655 3946 8653 3948 8650 3950 8649
      3952 8644 3955 8640 3951 8625 3934 8625
      3934 8628
TIME...MOT...LOC 2139Z 290DEG 28KT 3942 8639 

$$

INC109-202145-
/O.CON.KIND.SV.W.0055.000000T0000Z-170420T2145Z/
Morgan IN-
539 PM EDT THU APR 20 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN MORGAN COUNTY...

At 539 PM EDT, a severe thunderstorm was located over Martinsville,
or 18 miles north of Bloomington, moving east at 30 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Martinsville, Brooklyn, Morgantown, Bethany and Centerton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3942 8655 3946 8653 3948 8650 3950 8649
      3952 8644 3955 8640 3951 8625 3934 8625
      3934 8628
TIME...MOT...LOC 2139Z 290DEG 28KT 3942 8639 

HAIL...1.50IN
WIND...60MPH
 
$$

MK

742 
WWUS53 KIND 202146
SVSIND

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

INC109-202156-
/O.EXP.KIND.SV.W.0055.000000T0000Z-170420T2145Z/
Morgan IN-
546 PM EDT THU APR 20 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORGAN COUNTY HAS
EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However small
hail, 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 3942 8655 3946 8653 3948 8650 3950 8649
      3952 8644 3955 8640 3951 8625 3934 8625
      3934 8628
TIME...MOT...LOC 2146Z 273DEG 29KT 3942 8632 

$$

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, 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

Severe Thunderstorm Warnings in Indiana, 2017 Every severe thunderstorm warning 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.