Alert archive / Indiana / Mesoscale Discussions in 2019

Mesoscale Discussion 640

May 16, 20199 counties in Illinois; 11 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at May 16, 2019, 2:47 PM CDT for 9 counties in Illinois; 11 counties in Indiana. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: May 16, 2019, 2:47 PM CDT (19:47 UTC)
Expired: May 16, 2019, 4:45 PM CDT
In force: 118 min
Issued by: the Storm Prediction Center

Counties Champaign County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Macon County, IL, Moultrie County, IL, Piatt County, IL, Vermilion County, IL, Boone County, IN, Clinton County, IN, Fountain County, IN, Hamilton County, IN, Hendricks County, IN, Howard County, IN, Montgomery County, IN, Parke County, IN, Putnam County, IN, Tipton County, IN, Vermillion County, IN

The radar

The Indianapolis radar (KIND), 103 km from the middle of the area, began a volume at 19:47 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 169May 16, 3:30 PM CDT

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.8 hours before the alert went out and 106 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: 948 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 254 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.

Issued	Product	Office	Counties	Lasted
May 16, 12:09 PM CDT	Mesoscale Discussion	SPC	Champaign, Clark, Coles, DeWitt, Douglas, Edgar and 16 more	66 min
May 16, 12:51 PM CDT	Severe Thunderstorm Watch	SPC	Champaign, DeWitt, Ford, Grundy, Iroquois, Kankakee and 5 more	5 hr
May 16, 3:27 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Coles, Crawford, Douglas, Edgar, Lawrence	3 hr
May 16, 5:33 PM CDT	Mesoscale Discussion	SPC	Clark, Coles, Crawford, Douglas, Edgar, Lawrence	117 min

Nearby

Mesoscale Discussions in Indiana, 2019 Mesoscale Discussions in Illinois, 2019 Every 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.