Alert archive / Indiana / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 332

May 22, 201133 counties in Indiana; 18 counties in Michigan

The Storm Prediction Center issued this severe thunderstorm watch at May 22, 2011, 5:32 PM EDT for 33 counties in Indiana; 18 counties in Michigan. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: May 22, 2011, 5:32 PM EDT (21:32 UTC)
Expired: May 23, 2011, 12:52 AM EDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 51 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Muskegon County, MI, Ottawa County, MI, Saint Joseph County, MI, Van Buren County, MI

The radar

The Northern Indiana radar (KIWX), 109 km from the middle of the area, began a volume at 21:36 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: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 20%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 22, 5:44 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Marshall, Saint Joseph, Starke	61 min
May 22, 6:01 PM EDT	Severe Thunderstorm Warning	IWX	Fulton, Pulaski	59 min
May 22, 6:54 PM EDT	Severe Thunderstorm Warning	GRR	Van Buren	56 min
May 22, 7:12 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, LaGrange, Noble	63 min
May 22, 7:16 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Barry, Kalamazoo	59 min
May 22, 7:43 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	50 min
May 22, 7:47 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	58 min
May 22, 9:10 PM EDT	Severe Thunderstorm Warning	GRR	Clinton, Ingham	80 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

Detroit, MI (KDTX), launched 12:00Z, 9.5 hours before the alert went out and 258 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: 330 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 743 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 2:18 PM EDT	Severe Thunderstorm Watch	SPC	Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more	7 hr
May 22, 2:51 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 37 more	54 min
May 22, 3:04 PM EDT	Tornado Watch	SPC	Benton, Jasper, Lake, Newton, Porter	9 hr
May 22, 3:15 PM EDT	Mesoscale Discussion	SPC	Steuben	60 min
May 22, 5:16 PM EDT	Mesoscale Discussion	SPC	Allen, Benton, Boone, Carroll, Cass, Clinton and 30 more	119 min
May 22, 3:41 PM EDT	Severe Thunderstorm Watch	SPC	Bay, Genesee, Huron, Lapeer, Lenawee, Livingston and 11 more	3 hr
May 22, 4:43 PM EDT	Tornado Watch	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Marquette and 2 more	5 hr

Nearby

Severe Thunderstorm Watches in Indiana, 2011 Severe Thunderstorm Watches in Michigan, 2011 Every severe thunderstorm watch in 2011

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.