Alert archive / Michigan / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 64, NWS Northern Indiana

July 20, 2023LaGrange County, Indiana; Cass County, Saint Joseph County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jul 20, 2023, 2:48 PM EDT for LaGrange County, Indiana; Cass County, Saint Joseph County, Michigan. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 20, 2023, 2:48 PM EDT (18:48 UTC)
Expired: Jul 20, 2023, 3:18 PM EDT
In force: 30 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Damage threat: Considerable
Hail: 2.0 in
Wind: 60.0 mph

Counties LaGrange County, IN, Cass County, MI, Saint Joseph County, MI

The radar

The Northern Indiana radar (KIWX), 52 km from the middle of the area, began a volume at 18:48 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 20, 2:45 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 6.8 hours before the alert went out and 208 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: 68 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1249 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

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 Northern Indiana wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 1:38 PM EDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jul 20, 1:38 PM EDT, 1 hour 10 minutes before

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Hazardous weather outlook, Jul 20, 4:49 AM EDT, 9 hours 59 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 3:49 AM EDT	Small Craft Advisory	IWX		37 hr
Jul 20, 1:03 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Miami, Wabash	47 min
Jul 20, 2:50 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Elkhart, Marshall, Saint Joseph	40 min
Jul 20, 3:24 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Elkhart, Kosciusko, Noble	36 min
Jul 20, 3:48 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Elkhart, LaGrange, Noble	42 min
Jul 20, 4:08 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Kosciusko, Noble	22 min
Jul 20, 4:24 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Allen, DeKalb, Noble	51 min
Jul 20, 4:53 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Allen, DeKalb	67 min
Jul 20, 5:07 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Allen, Huntington, Whitley	38 min
Jul 20, 5:27 PM EDT	Special Weather Statement	IWX	Miami	48 min
Jul 20, 5:35 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Adams, Allen, Wells	55 min
Jul 20, 5:46 PM EDT	Tornado Warning	IWX	Allen	29 min
Jul 20, 6:13 PM EDT	Special Weather Statement	IWX	Allen	32 min
Jul 20, 6:18 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Van Wert	27 min
Jul 20, 6:27 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Allen	18 min
Jul 20, 6:36 PM EDT	Severe Thunderstorm Warning	IWX	Allen, Putnam	24 min
Jul 20, 6:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Allen, Van Wert	34 min
Jul 20, 3:13 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Branch, Hillsdale	23 min
Jul 20, 3:14 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Branch, Hillsdale	22 min
Jul 20, 3:16 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Branch, Saint Joseph	11 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2023 Severe Thunderstorm Warnings in Indiana, 2023 Every severe thunderstorm warning in 2023

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.