Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 50, NWS Indianapolis, IN

July 15, 2021Hendricks County, Marion County, Morgan County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 15, 2021, 5:40 PM EDT for Hendricks County, Marion County, Morgan County, Indiana. It was in force for 35 min. 3 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: Jul 15, 2021, 5:40 PM EDT (21:40 UTC)
Expired: Jul 15, 2021, 6:15 PM EDT
In force: 35 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hendricks County, IN, Marion County, IN, Morgan County, IN

The radar

The Indianapolis radar (KIND), 3 km from the middle of the area, began a volume at 21:43 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
Jul 15, 5:55 PM EDT	TSTM WND DMG	1 N Plainfield, IN	4 INCH DIAMETER TREE BRANCH SNAPPED OFF TRUNK.
Jul 15, 5:55 PM EDT	TSTM WND DMG	2 S Avon, IN	TREE OR TREES DOWN AND A TRAMPOLINE BADLY DAMAGED AS IT WAS BLOWN INTO THE STREET. TIME APPROXIMATED FROM RADAR.
Jul 15, 5:55 PM EDT	TSTM WND DMG	Plainfield, IN	TREE BLEW DOWN BY THUNDERSTORM WINDS. TIME ESTIMATED FROM RADAR.

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, 9.7 hours before the alert went out and 207 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: 628 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1096 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

467 
WUUS53 KIND 152140
SVRIND
INC063-097-109-152215-
/O.NEW.KIND.SV.W.0050.210715T2140Z-210715T2215Z/

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

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Northern Morgan County in central Indiana...
  Southern Hendricks County in central Indiana...
  Marion County in central Indiana...

* Until 615 PM EDT.

* At 540 PM EDT, a severe thunderstorm was located 8 miles west of
  Mooresville, or 23 miles southwest of Indianapolis, moving
  northeast at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Mooresville around 550 PM EDT.
  Plainfield, Avon and Camby around 555 PM EDT.
  Indianapolis Int'l Airport around 600 PM EDT.

Other locations in the path of this severe thunderstorm include
Speedway, Southport, Clermont, Homecroft, Beech Grove, Wynnedale,
Spring Hill, Monument Circle, Meridian Hills, Warren Park, Rocky
Ripple, Williams Creek, Crows Nest, North Crows Nest, Indiana State
Fairgrounds, Broad Ripple and Castleton.

This includes the following highways...
 Interstate 65 between mile markers 101 and 121.
 Interstate 69 between mile markers 200 and 202.
 Interstate 70 between mile markers 53 and 89.
 Interstate 74 between mile markers 72 and 94.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3964 8603 3963 8625 3961 8625 3957 8660
      3965 8666 3993 8609 3993 8602
TIME...MOT...LOC 2140Z 240DEG 40KT 3962 8653 

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

MK

1 follow-up statement

261 
WWUS53 KIND 152205
SVSIND

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

INC109-152214-
/O.CAN.KIND.SV.W.0050.000000T0000Z-210715T2215Z/
Morgan IN-
605 PM EDT Thu Jul 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MORGAN 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 3964 8603 3963 8640 3974 8637 3993 8609
      3993 8602
TIME...MOT...LOC 2204Z 237DEG 28KT 3972 8632 

$$

INC063-097-152215-
/O.CON.KIND.SV.W.0050.000000T0000Z-210715T2215Z/
Hendricks IN-Marion IN-
605 PM EDT Thu Jul 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHEASTERN HENDRICKS AND MARION COUNTIES...

At 604 PM EDT, a severe thunderstorm was located near Plainfield, or
9 miles west of Indianapolis, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
  Speedway, Monument Circle, Beech Grove, Rocky Ripple, Wynnedale, 
  Spring Hill, Meridian Hills, Warren Park, Crows Nest, North Crows 
  Nest, Indiana State Fairgrounds, Broad Ripple, Castleton, 
  Indianapolis, Fishers and Lawrence.

This includes the following highways...
 Interstate 65 between mile markers 101 and 119.
 Interstate 69 between mile markers 200 and 202.
 Interstate 70 between mile markers 66 and 89.
 Interstate 74 between mile markers 93 and 94.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3964 8603 3963 8640 3974 8637 3993 8609
      3993 8602
TIME...MOT...LOC 2204Z 237DEG 28KT 3972 8632 

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

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, 6:18 PM EDT	Severe Thunderstorm Warning	IND	Johnson, Marion	27 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.