Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 244, NWS Indianapolis, IN

September 21, 2012Hendricks County, Johnson County, Marion County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Sep 21, 2012, 7:07 PM EDT for Hendricks County, Johnson County, Marion County, Indiana. It was in force for 38 min. 31 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: Sep 21, 2012, 7:07 PM EDT (23:07 UTC)
Expired: Sep 21, 2012, 7:45 PM EDT
In force: 38 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.75 in
Wind: 70.0 mph

Counties Hendricks County, IN, Johnson County, IN, Marion County, IN

The radar

The Indianapolis radar (KIND), 5 km from the middle of the area, began a volume at 23:07 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
Sep 21, 7:07 PM EDT	HAIL 1	Brownsburg, IN
Sep 21, 7:08 PM EDT	HAIL 0.75	Brownsburg, IN	PENNY SIZED HAIL COVERING THE GROUND ON THE NORTH SIDE OF BROWNSBURG. MEASURED WIND GUST OF 52 MPH.
Sep 21, 7:11 PM EDT	TSTM WND GST 60	Brownsburg, IN
Sep 21, 7:11 PM EDT	HAIL 1.25	1 N Avon, IN	HALF DOLLAR SIZED HAIL ESTIMATED 1 N OF AVON.
Sep 21, 7:11 PM EDT	HAIL 1.5	Brownsburg, IN
Sep 21, 7:12 PM EDT	HAIL 1	2 W Avon, IN
Sep 21, 7:14 PM EDT	HAIL 0.75	1 E Avon, IN
Sep 21, 7:14 PM EDT	HAIL 0.75	3 W Avon, IN
Sep 21, 7:15 PM EDT	TSTM WND GST 60	3 W Speedway, IN	ESTIMATED 60 MPH WIND GUSTS ACCOMPANIED BY NICKEL SIZED HAIL AT 21ST STREET AND RACEWAY RD.
Sep 21, 7:15 PM EDT	HAIL 1	2 Nne Brownsburg, IN
Sep 21, 7:15 PM EDT	HAIL 1	2 Nnw Avon, IN
Sep 21, 7:16 PM EDT	HAIL 1	Avon, IN	QUARTER SIZED HAIL COVERED THE GROUND APPROXIMATELY ONE FOOT DEEP. ENDED AT 716 PM.
Sep 21, 7:17 PM EDT	HAIL 1.25	2 E Avon, IN
Sep 21, 7:18 PM EDT	HAIL 1	7 W Indianapolis, IN
Sep 21, 7:19 PM EDT	HAIL 0.88	2 E Plainfield, IN
Sep 21, 7:20 PM EDT	TSTM WND DMG	Brownsburg, IN	SIDING AND SHINGLES BLOWN OFF OF A HOME. PATIO FURNITURE AND A GAZEBO DAMAGED AT NEIGHBORING HOMES. NEAR STATE ROUTE 267 AND TILDON ROAD JUST SOUTH OF BROWNSBURG.
Sep 21, 7:20 PM EDT	HAIL 0.75	2 S Indianapolis Int'L, IN	HAIL APPROACHING PENNY SIZE AT NWS INDIANAPOLIS.
Sep 21, 7:20 PM EDT	HAIL 0.88	Brownsburg, IN
Sep 21, 7:20 PM EDT	HAIL 1	Indianapolis, IN	REPORTED AT THE RTV6 STUDIO.
Sep 21, 7:24 PM EDT	HAIL 1.25	3 Sse Speedway, IN	HALF DOLLAR SIZE HAIL REPORTED AT LYNHURST AND ROCKVILLE RD.
Sep 21, 7:25 PM EDT	HAIL 1	2 Nw Brownsburg, IN	TIME ESTIMATED BASED ON RADAR AND OTHER REPORTS IN THE AREA.
Sep 21, 7:25 PM EDT	HAIL 1	5 S Brownsburg, IN
Sep 21, 7:26 PM EDT	TSTM WND GST 65	4 W Indianapolis, IN	POWER IS OUT.
Sep 21, 7:26 PM EDT	HAIL 0.75	4 W Indianapolis, IN
Sep 21, 7:27 PM EDT	HAIL 1.75	Pittsboro, IN	LIMBS DOWN AND DAMAGE TO SIDING.
Sep 21, 7:35 PM EDT	HAIL 0.88	2 Sse Speedway, IN	NICKEL SIZED HAIL REPORTED AT 10TH ST AND LYNHURST DR. ALSO...1.50 INCHES OF RAIN MEASURED SINCE 600 PM.
Sep 21, 7:35 PM EDT	HAIL 1	5 Ene Indianapolis, IN	QUARTER SIZED HAIL REPORTED AT 10TH ST AND ARLINGTON AVE.
Sep 21, 7:36 PM EDT	HAIL 1.5	5 E Indianapolis, IN	HAIL COVERING THE GROUND.
Sep 21, 7:36 PM EDT	HAIL 1.75	8 Ese Indianapolis, IN	GOLF BALL HAIL REPORTED AT FRANKLIN RD AND RAYMOND ST.
Sep 21, 7:37 PM EDT	HAIL 0.88	Beech Grove, IN
Sep 21, 7:40 PM EDT	HAIL 1	1 W Cumberland, IN	QUARTER SIZE HAIL REPORTED JUST WEST OF CUMBERLAND.

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, 11.1 hours before the alert went out and 209 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: 2528 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

982 
WUUS53 KIND 212307
SVRIND
INC063-081-097-212345-
/O.NEW.KIND.SV.W.0244.120921T2307Z-120921T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
707 PM EDT FRI SEP 21 2012

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL HENDRICKS COUNTY IN CENTRAL INDIANA...
  NORTHERN JOHNSON COUNTY IN CENTRAL INDIANA...
  SOUTHERN MARION COUNTY IN CENTRAL INDIANA...

* UNTIL 745 PM EDT

* AT 702 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR
  BROWNSBURG...OR 16 MILES WEST OF INDIANAPOLIS...AND MOVING EAST AT
  50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  INDIANAPOLIS...
  PLAINFIELD...
  SPEEDWAY...
  SOUTHPORT...
  BEECH GROVE...
  GREENWOOD...
  CLERMONT...
  EAGLE CREEK RESERVOIR...
  INDIANAPOLIS INT'L AIRPORT...
  CAMBY...
  WYNNEDALE...
  SPRING HILL...
  MONUMENT CIRCLE...
  HOMECROFT...
  WARREN PARK...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 97 AND 122.

THIS INCLUDES INTERSTATE 70 BETWEEN MILE MARKERS 65 AND 89.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 60 AND 100.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE 
HAIL. GOLF BALL SIZE HAIL WAS REPORTED IN DANVILLE AT 705 PM. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3978 8595 3955 8596 3962 8625 3963 8625
      3963 8630 3970 8660 3991 8648
TIME...MOT...LOC 2307Z 289DEG 43KT 3981 8638
WIND...HAIL 70MPH 1.75IN

$$

RYAN

2 follow-up statements

139 
WWUS53 KIND 212318
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
718 PM EDT FRI SEP 21 2012

INC063-081-097-212345-
/O.CON.KIND.SV.W.0244.000000T0000Z-120921T2345Z/
HENDRICKS-JOHNSON-MARION-
718 PM EDT FRI SEP 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
HENDRICKS...NORTHERN JOHNSON AND SOUTHERN MARION COUNTIES UNTIL 745
PM EDT...

AT 716 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
SPEEDWAY...OR 5 MILES WEST OF INDIANAPOLIS...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  INDIANAPOLIS...SOUTHPORT...BEECH GROVE...GREENWOOD...MONUMENT
  CIRCLE...HOMECROFT AND WARREN PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN
THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3978 8595 3955 8596 3962 8625 3963 8625
      3963 8630 3969 8656 3988 8636
TIME...MOT...LOC 2318Z 289DEG 43KT 3976 8622
WIND...HAIL 60MPH 1.75IN

$$

RYAN

218 
WWUS53 KIND 212335
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
735 PM EDT FRI SEP 21 2012

INC063-212344-
/O.CAN.KIND.SV.W.0244.000000T0000Z-120921T2345Z/
HENDRICKS-
735 PM EDT FRI SEP 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HENDRICKS COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3955 8596 3962 8625 3963 8625 3963 8630
      3964 8633 3987 8633 3978 8595
TIME...MOT...LOC 2334Z 289DEG 42KT 3968 8608

$$

INC081-097-212345-
/O.CON.KIND.SV.W.0244.000000T0000Z-120921T2345Z/
JOHNSON-MARION-
735 PM EDT FRI SEP 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
JOHNSON AND SOUTHERN MARION COUNTIES UNTIL 745 PM EDT...

AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
SOUTHPORT...OR 5 MILES SOUTH OF INDIANAPOLIS...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EXTREME NORTHEASTERN JOHNSON AND SOUTHEASTERN
  MARION COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN
THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3955 8596 3962 8625 3963 8625 3963 8630
      3964 8633 3987 8633 3978 8595
TIME...MOT...LOC 2334Z 289DEG 42KT 3968 8608
WIND...HAIL 60MPH 1.75IN

$$

RYAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 21, 5:47 PM EDT	Special Weather Statement	IND	Hendricks	28 min
Sep 21, 5:53 PM EDT	Special Weather Statement	IND	Fountain	37 min
Sep 21, 6:21 PM EDT	Severe Thunderstorm Warning	IND	Boone, Fountain, Hendricks, Montgomery, Parke	39 min
Sep 21, 6:45 PM EDT	Severe Thunderstorm Warning	IND	Boone, Hamilton, Hendricks, Marion, Montgomery, Putnam	45 min
Sep 21, 7:30 PM EDT	Severe Thunderstorm Warning	IND	Hamilton, Hancock, Madison, Marion	45 min
Sep 21, 7:32 PM EDT	Areal Flood Advisory	IND	Marion	118 min
Sep 21, 7:42 PM EDT	Severe Thunderstorm Warning	IND	Hancock, Johnson, Marion, Shelby	33 min
Sep 21, 7:58 PM EDT	Severe Thunderstorm Warning	IND	Hancock, Henry, Rush, Shelby	47 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2012 Every severe thunderstorm warning in 2012

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.