Alert archive / Indiana / Severe Thunderstorm Watches in 2020

Severe Thunderstorm Watch 384

July 19, 20204 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 19, 2020, 10:32 AM CDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jul 19, 2020, 10:32 AM CDT (15:32 UTC)
Expired: Jul 19, 2020, 3:27 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 51 counties

Cook County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, Kendall County, IL, Livingston County, IL, Will County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Branch County, MI, Cass County, MI, Hillsdale County, MI, Saint Joseph County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH

The radar

The Northern Indiana radar (KIWX), 86 km from the middle of the area, began a volume at 15:35 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 5%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 20%
One or more hailstones of 2 inches or more: 10%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jul 19, 10:35 AM CDT	Severe Thunderstorm Warning	LOT	Grundy, Kendall	40 min
Jul 19, 10:40 AM CDT	Severe Thunderstorm Warning	LOT	Livingston	35 min
Jul 19, 11:02 AM CDT	Severe Thunderstorm Warning	LOT	Will	28 min
Jul 19, 11:38 AM CDT	Severe Thunderstorm Warning	LOT	Cook	22 min
Jul 19, 11:46 AM CDT	Severe Thunderstorm Warning	LOT	Jasper, Newton	44 min
Jul 19, 11:51 AM CDT	Severe Thunderstorm Warning	IWX	Cass, Fulton, Pulaski, White	54 min
Jul 19, 12:22 PM CDT	Severe Thunderstorm Warning	IWX	Berrien	38 min
Jul 19, 12:58 PM CDT	Severe Thunderstorm Warning	IWX	Adams, Allen, Blackford, Fulton, Grant, Huntington and 6 more	47 min
Jul 19, 1:43 PM CDT	Severe Thunderstorm Warning	IWX	Allen, DeKalb	47 min
Jul 19, 2:00 PM CDT	Severe Thunderstorm Warning	IWX	Allen	30 min
Jul 19, 2:08 PM CDT	Severe Thunderstorm Warning	IWX	Defiance, Fulton, Henry, Paulding, Williams	52 min
Jul 19, 2:17 PM CDT	Severe Thunderstorm Warning	IWX	Fulton	28 min
Jul 19, 2:39 PM CDT	Severe Thunderstorm Warning	IWX	Defiance, Henry	36 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 3.5 hours before the alert went out and 223 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: 930 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 1208 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 10:12 AM CDT	Mesoscale Discussion	SPC	Bureau, Cook, DeKalb, DuPage, Ford, Grundy and 14 more	93 min
Jul 19, 12:19 PM CDT	Mesoscale Discussion	SPC	Ford, Iroquois	86 min
Jul 19, 3:00 PM CDT	Mesoscale Discussion	SPC	Calhoun	2 hr
Jul 19, 2:10 PM CDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, DeKalb, Jay, Steuben and 1 more	2 hr
Jul 18, 8:36 PM CDT	Mesoscale Discussion	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw and 2 more	114 min
Jul 18, 9:44 PM CDT	Severe Thunderstorm Watch	SPC	Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 6 more	7 hr
Jul 19, 1:13 AM CDT	Mesoscale Discussion	SPC	Alger, Baraga, Delta, Dickinson, Iron, Marquette and 2 more	92 min
Jul 19, 3:22 AM CDT	Mesoscale Discussion	SPC	Alpena, Antrim, Benzie, Charlevoix, Cheboygan, Clare and 15 more	83 min
Jul 19, 7:42 AM CDT	Mesoscale Discussion	SPC	Arenac, Barry, Bay, Branch, Calhoun, Clinton and 27 more	2 hr
Jul 19, 2:36 PM CDT	Mesoscale Discussion	SPC	Ashland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 21 more	114 min
Jul 19, 3:16 PM CDT	Severe Thunderstorm Watch	SPC	Ashland, Ashtabula, Champaign, Clark, Crawford, Cuyahoga and 31 more	4 hr
Jul 19, 5:54 PM CDT	Mesoscale Discussion	SPC	Carroll, Columbiana, Geauga, Harrison, Jefferson, Mahoning and 6 more	66 min

Nearby

Severe Thunderstorm Watches in Indiana, 2020 Severe Thunderstorm Watches in Illinois, 2020 Severe Thunderstorm Watches in Ohio, 2020 Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.