Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 51, NWS Indianapolis, IN

July 15, 2021Johnson County, Marion County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 15, 2021, 6:18 PM EDT for Johnson County, Marion County, Indiana. It was in force for 27 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: Jul 15, 2021, 6:18 PM EDT (22:18 UTC)
Expired: Jul 15, 2021, 6:45 PM EDT
In force: 27 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Johnson County, IN, Marion County, IN

The radar

The Indianapolis radar (KIND), 20 km from the middle of the area, began a volume at 22:20 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, 10.3 hours before the alert went out and 197 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: 33 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1042 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

689 
WUUS53 KIND 152218
SVRIND
INC081-097-152245-
/O.NEW.KIND.SV.W.0051.210715T2218Z-210715T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
618 PM EDT Thu Jul 15 2021

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Northern Johnson County in central Indiana...
  Marion County in central Indiana...

* Until 645 PM EDT.

* At 616 PM EDT, a severe thunderstorm was located near 
  Indianapolis, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Southport and Homecroft around 620 PM EDT.
  Beech Grove, Wynnedale, Spring Hill and Monument Circle around 625 
  PM EDT.
  Rocky Ripple and Indiana State Fairgrounds around 630 PM EDT.
  Warren Park, Crows Nest, North Crows Nest and Broad Ripple around 
  635 PM EDT.

Other locations in the path of this severe thunderstorm include
Indianapolis, Lawrence, Cumberland, Geist Reservoir and Castleton.

This includes the following highways...
 Interstate 65 between mile markers 91 and 126.
 Interstate 69 between mile markers 200 and 202.
 Interstate 70 between mile markers 75 and 93.
 Interstate 74 between mile markers 73 and 100.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3987 8594 3987 8595 3950 8595 3948 8622
      3970 8624 3992 8632 3993 8594
TIME...MOT...LOC 2216Z 235DEG 24KT 3972 8620 

HAIL...<.75IN
WIND...60MPH
 
$$

MK

2 follow-up statements

558 
WWUS53 KIND 152230
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
630 PM EDT Thu Jul 15 2021

INC081-097-152245-
/O.CON.KIND.SV.W.0051.000000T0000Z-210715T2245Z/
Johnson IN-Marion IN-
630 PM EDT Thu Jul 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHEASTERN JOHNSON AND EASTERN MARION COUNTIES...

At 630 PM EDT, a severe thunderstorm was located over Indianapolis,
moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

This severe storm will be near...
  Warren Park around 635 PM EDT.

Other locations in the path of this severe thunderstorm include
Cumberland, Castleton, Geist Reservoir, Lawrence and Indianapolis.

This includes the following highways...
 Interstate 65 between mile markers 91 and 107, and between mile
markers 109 and 113, and near mile marker 115.
 Interstate 69 between mile markers 200 and 202.
 Interstate 70 between mile markers 83 and 93.
 Interstate 74 between mile markers 93 and 100.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3987 8594 3987 8595 3950 8595 3949 8612
      3972 8613 3992 8622 3993 8594
TIME...MOT...LOC 2230Z 235DEG 24KT 3977 8610 

HAIL...<.75IN
WIND...60MPH
 
$$

MK

249 
WWUS53 KIND 152245
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
645 PM EDT Thu Jul 15 2021

INC081-097-152255-
/O.EXP.KIND.SV.W.0051.000000T0000Z-210715T2245Z/
Johnson IN-Marion IN-
645 PM EDT Thu Jul 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JOHNSON AND
EASTERN MARION COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3987 8594 3987 8595 3950 8595 3949 8612
      3972 8613 3992 8622 3993 8594
TIME...MOT...LOC 2245Z 235DEG 24KT 3982 8601 

$$

MK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 3:58 PM EDT	Special Weather Statement	IND	Vigo	32 min
Jul 15, 4:59 PM EDT	Special Weather Statement	IND	Tippecanoe	31 min
Jul 15, 5:10 PM EDT	Special Weather Statement	IND	Carroll	35 min
Jul 15, 5:10 PM EDT	Special Weather Statement	IND	Owen	35 min
Jul 15, 5:25 PM EDT	Severe Thunderstorm Warning	IND	Morgan, Owen, Putnam	35 min
Jul 15, 5:36 PM EDT	Special Weather Statement	IND	Howard	24 min
Jul 15, 5:40 PM EDT	Severe Thunderstorm Warning	IND	Hendricks, Marion, Morgan	35 min
Jul 15, 6:48 PM EDT	Special Weather Statement	IND	Hancock, Rush, Shelby	42 min
Jul 15, 7:30 PM EDT	Special Weather Statement	IND	Warren	30 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2021 Every severe thunderstorm warning in 2021

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.