Alert archive / Indiana / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 68, NWS Indianapolis, IN

July 11, 2020Marion County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 11, 2020, 4:41 PM EDT for Marion County, Indiana. It was in force for 34 min. 5 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 11, 2020, 4:41 PM EDT (20:41 UTC)
Expired: Jul 11, 2020, 5:15 PM EDT
In force: 34 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Marion County, IN

The radar

The Indianapolis radar (KIND), 21 km from the middle of the area, began a volume at 20:43 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 11, 4:50 PM EDT	HAIL 1	1 Wnw Crows Nest, IN	QUARTER SIZE HAIL NEAR 56TH AND MICHIGAN RD.
Jul 11, 4:50 PM EDT	HAIL 1	3 Wnw Meridian Hills, IN	QUARTER SIZE HAIL NEAR 79TH AND MICHIGAN RD.
Jul 11, 4:52 PM EDT	TSTM WND DMG	2 E Eagle Creek Reservo, IN	6 INCH TREE LIMBS BROKE NEAR 56TH STREET AND LAFAYETTE RD.
Jul 11, 4:59 PM EDT	HAIL 1	Monument Circle, IN	QUARTER SIZE HAIL DOWNTOWN.
Jul 11, 5:05 PM EDT	HAIL 1	2 Wnw Beech Grove, IN	QUARTER SIZE HAIL AT KEYSTONE AVE AND TROY AVE.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 5 storm reports to this severe thunderstorm warning; the first came 9 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.7 hours before the alert went out and 201 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: 1344 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

197 
WUUS53 KIND 112041
SVRIND
INC097-112115-
/O.NEW.KIND.SV.W.0068.200711T2041Z-200711T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Indianapolis IN
441 PM EDT Sat Jul 11 2020

The National Weather Service in Indianapolis has issued a

* Severe Thunderstorm Warning for...
  Central Marion County in central Indiana...

* Until 515 PM EDT.

* At 441 PM EDT, a severe thunderstorm was located near Speedway, or
  near Indianapolis, moving southeast at 50 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Indianapolis, Carmel, Lawrence, Beech Grove, Speedway, Southport,
  Cumberland, Meridian Hills, Warren Park, Homecroft, Rocky Ripple,
  Williams Creek, Wynnedale, Spring Hill, Crows Nest, North Crows
  Nest, Monument Circle, Eagle Creek Reservoir, Indiana State
  Fairgrounds and Broad Ripple.

This includes the following highways...
 Interstate 65 between mile markers 104 and 123.
 Interstate 69 near mile marker 200.
 Interstate 70 between mile markers 77 and 93.
 Interstate 74 between mile markers 93 and 95.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3984 8595 3975 8595 3965 8613 3985 8631
      3993 8620 3993 8610
TIME...MOT...LOC 2041Z 310DEG 44KT 3986 8621 

HAIL...0.75IN
WIND...60MPH
 
$$

Puma

3 follow-up statements

992 
WWUS53 KIND 112047
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
447 PM EDT Sat Jul 11 2020

INC097-112115-
/O.CON.KIND.SV.W.0068.000000T0000Z-200711T2115Z/
Marion IN-
447 PM EDT Sat Jul 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR CENTRAL MARION COUNTY...

At 446 PM EDT, a severe thunderstorm was located near Indianapolis,
moving southeast at 50 mph.

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

SOURCE...Radar indicated.

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

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

This includes the following highways...
 Interstate 65 between mile markers 104 and 122.
 Interstate 69 near mile marker 200.
 Interstate 70 between mile markers 78 and 93.
 Interstate 74 between mile markers 93 and 95.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3984 8595 3975 8595 3965 8613 3985 8629
      3987 8626 3992 8619 3993 8610
TIME...MOT...LOC 2046Z 321DEG 42KT 3982 8618 

HAIL...0.75IN
WIND...60MPH
 
$$

Puma

744 
WWUS53 KIND 112057
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
457 PM EDT Sat Jul 11 2020

INC097-112115-
/O.CON.KIND.SV.W.0068.000000T0000Z-200711T2115Z/
Marion IN-
457 PM EDT Sat Jul 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR CENTRAL MARION COUNTY...

At 457 PM EDT, a severe thunderstorm was located over Indianapolis,
moving southeast at 35 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Indianapolis, Lawrence, Beech Grove, Southport, Cumberland, Warren
Park, Homecroft, Spring Hill, Monument Circle, Indiana State
Fairgrounds and Broad Ripple.

This includes the following highways...
 Interstate 65 between mile markers 104 and 117.
 Interstate 70 between mile markers 79 and 93.
 Interstate 74 between mile markers 93 and 95.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3984 8595 3975 8595 3965 8613 3980 8621
      3982 8621 3989 8610
TIME...MOT...LOC 2057Z 315DEG 31KT 3978 8612 

HAIL...0.75IN
WIND...60MPH
 
$$

Puma

640 
WWUS53 KIND 112109
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
509 PM EDT Sat Jul 11 2020

INC097-112118-
/O.EXP.KIND.SV.W.0068.000000T0000Z-200711T2115Z/
Marion IN-
509 PM EDT Sat Jul 11 2020

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MARION COUNTY WILL
EXPIRE AT 515 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for
southern Marion County.

LAT...LON 3984 8595 3975 8595 3965 8613 3980 8621
      3982 8621 3989 8610
TIME...MOT...LOC 2108Z 310DEG 44KT 3970 8600 

$$

Puma

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Indianapolis, IN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 2:50 PM EDT, 1 hour 51 minutes earlier.

Area forecast discussion, Jul 11, 2:50 PM EDT, 1 hour 51 minutes before

Area Forecast Discussion
National Weather Service Indianapolis IN
250 PM EDT Sat Jul 11 2020

.UPDATE...
The LONG TERM Section has been updated below.

&&

.SYNOPSIS...
Issued at 148 PM EDT Sat Jul 11 2020

A pair of upper level weather disturbances will push across
Indiana tonight and on Sunday. This will bring chances for
showers and thunderstorms to Central Indiana to close out the
weekend.

High pressure is then expected to build across the area for the
start of the work week...providing dry weather with slightly below
normal temperatures.

A warm front is expected to push across the area on Tuesday. This
will usher hot and humid air back to Central Indiana...along with
chances for daily showers and thunderstorms for the middle and
latter part of the work week.

&&

.NEAR TERM /Tonight/...

Issued at 148 PM EDT Sat Jul 11 2020

Surface analysis early this afternoon shows high pressure in place
across the lower Mississippi river Valley and Low pressure over
upstate NY. This was resulting in a light W-NW flow across
Indiana...with dew point temps mainly in the low to mid 60s. A
convective complex was found over eastern IA and Nrn IL...pushing
SE within the flow aloft.

The air mass ahead of the approaching convection and subtle short
wave will be marginally favorable for convection. Forecast
soundings show CAPE around 1500 J/kg along with convective
temperatures in the upper 80s which should be reached. HRRR shows
scattered convection arriving late this afternoon and into the
early evening within the NW flow aloft. Thus will focus some pops
late this afternoon and early this evening given the impact of
daytime heating. Better forcing looks to arrive overnight in
association with the approaching short wave over the upper
Midwest. Time Height at that time suggest deep moisture and lift
in play. HRRR at that time also suggests more widespread
precipitation overspreading the area. Thus will once again trend
pops higher after midnight and into early Sunday as this feature
pushes across the area. Given the expected clouds and possible
precip...will trend lows at or above the NBM.

&&

.SHORT TERM /Sunday Through Tuesday/...

Issued at 148 PM EDT Sat Jul 11 2020

GFS and NAM show the short wave departing on Early Sunday
morning. However forecast soundings by Sunday afternoon again
show favorable conditions for convection with steep lapse
rates...CAPE over 2500 J/KG and pwats over 1.5...and convective
temps in the lower 80s. Thus will keep some pops in the forecast
on Sunday through the hours of Diurnal heating. However of
note..any afternoon convection should be much more isolated.

Forecast soundings show good subsidence within the column on
Sunday afternoon into Sunday Night....as mid levels show good
drying. Meanwhile at the surface high pressure is expected to
build across Indiana and the Great Lakes...lowly passing across
the area through Tuesday. As the high pressure passes along with
the NW flow in place aloft on the lee side of an upper ridge over
the plains...more subsidence will be expected through Tuesday.
With Northeast winds expected around high...Dry weather will be
expected on Monday through Tuesday with slightly below normal
temperatures.

&&

.LONG TERM /Tuesday Night to Saturday/...

Issued at 234 PM EDT Sat Jul 11 2020

Upper high pressure will expand into our area through the long
term. Recent models continue to trend with the high not moving
into the area quite as much as previous runs, thus have also been
trending towards highs only getting into the low 90s rather than
mid 90s or slightly higher. This will also place the region under
more zonal flow as well as on the periphery of the high... in
these cases, slight upper wave and mesoscale disturbances become
more influential for rain chances. These conditions lead to lower
confidence on specific rain events through the long term as models
fluctuate. Have generally accepted guidance, but did cap PoPs at
chance.

&&

.AVIATION /Discussion for the 11/18Z TAF Issuance/...

Issued at 149 PM EDT Sat Jul 11 2020

VFR conditions are expected to prevail through the TAF period with
the exception of a few sites getting down to MVFR within storms
and expected lower ceilings tomorrow morning ahead of a front.

A frontal system will bring a line of storms into the area
starting tonight and lasting through the day tomorrow. Some
isolated storms are possible through the rest of this afternoon
and evening, ahead of the system. Winds will be shifting with the
passage of the front from westerly to northerly, which models show
will pass through central Indiana during the morning to midday
hours.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SYNOPSIS...Puma
NEAR TERM...Puma
SHORT TERM...Puma
LONG TERM....KH
AVIATION...KH

Hazardous weather outlook, Jul 11, 4:20 AM EDT, 12 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Indianapolis IN
420 AM EDT Sat Jul 11 2020

INZ021-028>031-035>049-051>057-060>065-067>072-121015-
Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone-
Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam-
Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby-
Rush-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-
Martin-Lawrence-Jackson-Jennings-
Including the cities of Delphi, Flora, Williamsport, West Lebanon,
Lafayette, West Lafayette, Frankfort, Kokomo, Attica, Covington,
Veedersburg, Crawfordsville, Lebanon, Zionsville, Tipton, Fishers,
Carmel, Noblesville, Anderson, Muncie, Winchester, Clinton, Newport,
Rockville, Greencastle, Plainfield, Brownsburg, Danville,
Indianapolis, Greenfield, Cumberland, New Castle, Terre Haute,
Brazil, Clay City, Spencer, Martinsville, Mooresville, Greenwood,
Franklin, Shelbyville, Rushville, Sullivan, Linton, Bloomfield,
Bloomington, Nashville, Columbus, Greensburg, Vincennes, Washington,
Loogootee, Shoals, Bedford, Mitchell, Seymour, Brownstown,
and North Vernon
420 AM EDT Sat Jul 11 2020

This hazardous weather outlook is for central Indiana.

.DAY ONE...Today and Tonight.

Outlook: Thunderstorms possible late this afternoon and tonight. A
few storms may be severe this evening...especially over western
portions of central Indiana.

Hazards: Damaging winds...large hail...lightning and locally heavy
rainfall.

Timing: Storms possible anytime after 4 pm. Greatest threat for
severe weather this evening.

Discussion: Today will be mainly dry as high pressure shifts east. An
upper level disturbance will approach the area by late day with
chances for thunderstorms increasing from late this afternoon into
tonight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Outlook: Showers and thunderstorms will continue on Sunday. Daily
chances for isolated to scattered thunderstorms will return Tuesday
night and continue into next weekend.

Heat index values could approach 100 across all of central Indiana
on Thursday and Friday.

Discussion: The upper level disturbance will move across the Ohio
Valley on Sunday...bringing the best chance for numerous showers and
thunderstorms through the next week. After a couple dry days...
thunderstorm chances return Tuesday night through Friday along with
a return to hot and humid conditions.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

Ryan

In the hours before

Local storm report, Jul 11, 3:48 PM EDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
348 PM EDT SAT JUL 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0335 PM     TSTM WND DMG     4 ENE BATTLE GROUND     40.53N 86.76W
07/11/2020                   TIPPECANOE         IN   TRAINED SPOTTER

            SPOTTER REPORTS POWER OUTAGE. ESTIMATED 60
            MPH WINDS.

&&

JP

Local storm report, Jul 11, 4:03 PM EDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
403 PM EDT SAT JUL 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0358 PM     HAIL             FRANKFORT               40.28N 86.51W
07/11/2020  E0.70 INCH       CLINTON            IN   TRAINED SPOTTER

&&

JP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 3:13 PM EDT	Severe Thunderstorm Warning	IND	Carroll, Tippecanoe	32 min
Jul 11, 4:01 PM EDT	Severe Thunderstorm Warning	IND	Boone, Clinton, Hamilton, Tipton	29 min
Jul 11, 5:04 PM EDT	Severe Thunderstorm Warning	IND	Fountain, Montgomery, Parke, Vermillion	41 min
Jul 11, 5:06 PM EDT	Severe Thunderstorm Warning	IND	Johnson, Marion, Shelby	24 min
Jul 11, 5:29 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Johnson, Shelby	31 min
Jul 11, 5:33 PM EDT	Severe Thunderstorm Warning	IND	Hendricks, Morgan, Putnam	27 min
Jul 11, 5:43 PM EDT	Severe Thunderstorm Warning	IND	Fountain, Parke, Vermillion	32 min
Jul 11, 6:11 PM EDT	Severe Thunderstorm Warning	IND	Parke, Vermillion, Vigo	34 min
Jul 11, 6:16 PM EDT	Tornado Warning	IND	Parke	29 min
Jul 11, 6:24 PM EDT	Severe Thunderstorm Warning	IND	Brown, Monroe	36 min
Jul 11, 6:40 PM EDT	Severe Thunderstorm Warning	IND	Clay, Vigo	35 min
Jul 11, 6:49 PM EDT	Severe Thunderstorm Warning	IND	Jackson, Jennings	26 min
Jul 11, 7:06 PM EDT	Severe Thunderstorm Warning	IND	Clay, Sullivan, Vigo	24 min
Jul 11, 7:10 PM EDT	Severe Thunderstorm Warning	IND	Jackson, Lawrence	35 min
Jul 11, 7:22 PM EDT	Severe Thunderstorm Warning	IND	Greene, Monroe, Owen	38 min
Jul 11, 7:27 PM EDT	Severe Thunderstorm Warning	IND	Clay, Sullivan, Vigo	33 min
Jul 11, 7:36 PM EDT	Severe Thunderstorm Warning	IND	Lawrence	24 min
Jul 11, 7:56 PM EDT	Severe Thunderstorm Warning	IND	Clay, Owen, Sullivan, Vigo	34 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2020 Every severe thunderstorm warning in 2020

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.