Alert archive / Indiana / Special Weather Statements in 2018

Special Weather Statement, NWS Indianapolis, IN

July 20, 2018Delaware County, Madison County, Indiana

NWS Indianapolis, IN issued this special weather statement at Jul 20, 2018, 10:03 AM EDT for Delaware County, Madison County, Indiana. It was in force for 42 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 20, 2018, 10:03 AM EDT (14:03 UTC)
Expired: Jul 20, 2018, 10:45 AM EDT
In force: 42 min
Issued by: NWS Indianapolis, IN

Counties Delaware County, IN, Madison County, IN

The radar

The Indianapolis radar (KIND), 79 km from the middle of the area, began a volume at 14:05 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

Lincoln, IL (KILX), launched 12:00Z, 2.1 hours before the alert went out and 255 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: 265 J/kg
Mixed-layer CIN: -249 J/kg
Mixed-layer LCL: 1579 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 273 m²/s²
0-3 km storm-relative helicity: 343 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 20, 9:55 AM EDT, 8 minutes earlier.

Area forecast discussion, Jul 20, 9:55 AM EDT, 8 minutes before

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Hazardous weather outlook, Jul 20, 9:12 AM EDT, 51 minutes before

Hazardous Weather Outlook
National Weather Service Indianapolis IN
912 AM EDT Fri Jul 20 2018

INZ021-028>031-035>049-051>057-060>065-067>072-211315-
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 Lafayette, Frankfort, Kokomo,
Crawfordsville, Anderson, Muncie, Indianapolis, Terre Haute,
Shelbyville, Bloomington, Columbus, Vincennes, Bedford, and Seymour
912 AM EDT Fri Jul 20 2018

This hazardous weather outlook is for central Indiana.

.DAY ONE...Today and Tonight.

Outlook: Severe storms are expected today.

Hazards: Large hail, damaging winds, tornadoes, localized flash
flooding and frequent lightning.

Timing: Thunderstorms are possible throughout the day, but the most
likely window for severe storms is from 1 to 10 pm.

Discussion: An unseasonably strong low pressure system will bring
thunderstorms, some severe, to central Indiana today and early
tonight. Hail larger than golf ball size is likely in some of these
storms, along with damaging winds and isolated tornadoes.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Outlook: Thunderstorms will be possible most times from Saturday
through Monday, but severe storms are not expected. There are also
small chances for storms off and on from Tuesday through Thursday,
but again none of these appear to have severe potential.

Discussion: A strong low pressure system moving through the Great
Lakes and Ohio Valley will keep chances for thunderstorms in the
forecast through Monday. After that surface fronts will bring small
off and on chances for thunderstorms through Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon and evening.

&&

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

DRT

In the hours before

Special weather statement, Jul 20, 10:03 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Indianapolis IN
1003 AM EDT FRI JUL 20 2018

INZ039>041-201445-
Madison IN-Delaware IN-Hamilton IN-
1003 AM EDT FRI JUL 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MADISON...DELAWARE AND
NORTHEASTERN HAMILTON COUNTIES UNTIL 1045 AM EDT...

At 1001 AM EDT, Doppler radar was tracking a strong thunderstorm
near Elwood, or 9 miles northwest of Anderson, moving east at 45
mph. An additional strong thunderstorm was impacting northeast
Delaware County to the northeast of Muncie.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Muncie, Anderson, Elwood, Alexandria, Yorktown, Chesterfield, Albany,
Lapel, Edgewood, Frankton, Eaton, Daleville, Gaston, Selma, Orestes,
Woodlawn Heights, Country Club Heights, River Forest, Ball State
University and Prairie Creek Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4012 8523 4007 8589 4022 8593 4022 8586
      4026 8586 4038 8522
TIME...MOT...LOC 1401Z 258DEG 37KT 4018 8582

Ryan

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 3:09 AM EDT	Special Weather Statement	IND	Vigo	36 min
Jul 20, 10:41 AM EDT	Special Weather Statement	IND	Delaware	49 min
Jul 20, 11:26 AM EDT	Special Weather Statement	IND	Randolph	49 min
Jul 20, 12:24 PM EDT	Special Weather Statement	IND	Bartholomew	51 min
Jul 20, 12:40 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Brown, Decatur, Jackson, Jennings	50 min
Jul 20, 1:27 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Jackson, Jennings	48 min
Jul 20, 1:37 PM EDT	Areal Flood Warning	IND	Bartholomew, Brown, Decatur, Jackson, Jennings	3 hr
Jul 20, 1:50 PM EDT	Severe Thunderstorm Warning	IND	Jackson, Jennings	40 min
Jul 20, 2:28 PM EDT	Severe Thunderstorm Warning	IND	Jennings	32 min
Jul 20, 4:29 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Randolph	31 min
Jul 20, 4:54 PM EDT	Severe Thunderstorm Warning	IND	Jennings	36 min
Jul 20, 5:03 PM EDT	Severe Thunderstorm Warning	IND	Delaware	42 min
Jul 20, 6:08 PM EDT	Severe Thunderstorm Warning	IND	Jackson, Jennings	37 min
Jul 20, 6:55 PM EDT	Severe Thunderstorm Warning	IND	Jennings	35 min

Nearby

Special Weather Statements in Indiana, 2018 Every special weather statement in 2018

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.