Alert archive / Indiana / Mesoscale Discussions in 2019

Mesoscale Discussion 1561

July 21, 20197 counties in Illinois; 55 counties in Indiana; Darke County, Miami County, Preble County, Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2019, 12:56 PM CDT for 7 counties in Illinois; 55 counties in Indiana; Darke County, Miami County, Preble County, Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 21, 2019, 12:56 PM CDT (17:56 UTC)
Expired
Jul 21, 2019, 3:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 65 counties

Champaign County, IL, Coles County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Iroquois County, IL, Vermilion County, IL, Bartholomew County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Jennings County, IN, Johnson County, IN, Kosciusko County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Newton County, IN, Owen County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Saint Joseph County, IN, Shelby County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Darke County, OH, Miami County, OH, Preble County, OH

The radar

The Indianapolis radar (KIND), 63 km from the middle of the area, began a volume at 18:00 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, 5.9 hours before the alert went out and 152 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2019-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 53 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2019-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -93 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
53 J/kg
Mixed-layer CIN
-241 J/kg
Mixed-layer LCL
1780 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-93 m²/s²
0-3 km storm-relative helicity
-54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 20, 7:13 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Cass, Fulton, Hancock, Henderson and 10 more4 hr
Jul 21, 11:00 AM CDTMesoscale DiscussionSPCBelmont, Carroll, Champaign, Columbiana, Coshocton, Delaware and 19 more3 hr

Nearby

Mesoscale Discussions in Indiana, 2019Mesoscale Discussions in Illinois, 2019Mesoscale Discussions in Ohio, 2019Every mesoscale discussion in 2019

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.