Alert archive / Indiana / Tornado Watches in 2009

Tornado Watch 478

June 19, 200946 counties in Indiana; 4 counties in Michigan

The Storm Prediction Center issued this tornado watch at Jun 19, 2009, 11:50 AM EDT for 46 counties in Indiana; 4 counties in Michigan. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 19, 2009, 11:50 AM EDT (15:50 UTC)
Expired
Jun 19, 2009, 7:00 PM EDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 50 counties

Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fountain 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, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Randolph County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Branch County, MI, Cass County, MI, Saint Joseph County, MI

The radar

The Northern Indiana radar (KIWX), 59 km from the middle of the area, began a volume at 15:54 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
40%
One or more EF2 to EF5 tornadoes
10%
Ten or more severe wind reports
50%
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
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 19, 4:08 PM EDTSevere Thunderstorm WarningLOTBenton12 min
Jun 19, 4:17 PM EDTSevere Thunderstorm WarningIWXElkhart, Fulton, Kosciusko, Marshall58 min
Jun 19, 4:35 PM EDTSevere Thunderstorm WarningIWXFulton, Huntington, Kosciusko, Miami, Wabash, Whitley55 min
Jun 19, 4:42 PM EDTTornado WarningIWXFulton, Kosciusko, Miami, Wabash48 min
Jun 19, 5:25 PM EDTTornado WarningIWXHuntington, Kosciusko, Miami, Wabash, Whitley50 min
Jun 19, 5:44 PM EDTSevere Thunderstorm WarningIWXFulton, Marshall, Pulaski, Starke51 min
Jun 19, 6:05 PM EDTTornado WarningIWXAllen, Huntington, Wells40 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, 3.8 hours before the alert went out and 226 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 2009-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2125 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 2009-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
2125 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
982 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 12:07 AM EDTMesoscale DiscussionSPCElkhart, Kosciusko, Lake, LaPorte, Marshall, Porter and 2 more53 min
Jun 19, 12:30 AM EDTSevere Thunderstorm WatchSPCDeKalb, Elkhart, Fulton, Jasper, Kosciusko, LaGrange and 10 more7 hr
Jun 19, 3:38 AM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Carroll, Cass, DeKalb and 28 more97 min
Jun 19, 4:16 AM EDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Cass, Delaware, Fayette and 15 more6 hr
Jun 19, 7:37 AM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, DeKalb, Elkhart, Fulton and 11 more83 min
Jun 19, 11:27 AM EDTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 41 more63 min
Jun 19, 2:37 PM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 27 more83 min
Jun 19, 3:24 PM EDTSevere Thunderstorm WatchSPCBenton, Jasper, Lake, Newton, Porter8 hr
Jun 19, 6:11 PM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 48 more94 min
Jun 19, 6:37 PM EDTMesoscale DiscussionSPCBenton, Carroll, Cass, Fountain, Jasper, Lake and 11 more53 min
Jun 19, 6:59 PM EDTTornado WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 65 more8 hr
Jun 19, 7:04 PM EDTMesoscale DiscussionSPCAllegan, Barry, Calhoun, Clinton, Eaton, Genesee and 19 more86 min

Nearby

Tornado Watches in Indiana, 2009Tornado Watches in Michigan, 2009Every tornado watch in 2009

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.