Alert archive / Indiana / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 169

May 11, 201631 counties in Indiana

The Storm Prediction Center issued this severe thunderstorm watch at May 11, 2016, 4:55 PM EDT for 31 counties in Indiana. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2016, 4:55 PM EDT (20:55 UTC)
Expired
May 11, 2016, 10:21 PM EDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 31 counties

Bartholomew County, IN, Brown County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Fountain County, IN, Greene County, IN, Harrison County, IN, Hendricks County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Perry County, IN, Putnam County, IN, Sullivan County, IN, Tippecanoe County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, Washington County, IN

The radar

The Indianapolis radar (KIND), 60 km from the middle of the area, began a volume at 20:58 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
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 11, 6:15 PM EDTSevere Thunderstorm WarningINDSullivan, Vigo30 min
May 11, 6:28 PM EDTSevere Thunderstorm WarningINDKnox47 min
May 11, 6:52 PM EDTSevere Thunderstorm WarningINDGreene, Knox, Sullivan38 min
May 11, 7:04 PM EDTSevere Thunderstorm WarningINDClay, Greene, Owen26 min
May 11, 7:05 PM EDTSevere Thunderstorm WarningINDParke, Vermillion25 min
May 11, 7:07 PM EDTSevere Thunderstorm WarningLMKDubois23 min
May 11, 7:27 PM EDTSevere Thunderstorm WarningINDGreene33 min
May 11, 7:29 PM EDTSevere Thunderstorm WarningINDGreene, Owen31 min
May 11, 7:35 PM EDTSevere Thunderstorm WarningLMKCrawford, Dubois, Perry25 min
May 11, 8:00 PM EDTSevere Thunderstorm WarningLMKCrawford, Harrison, Perry30 min
May 11, 8:06 PM EDTSevere Thunderstorm WarningLMKHarrison, Perry24 min
May 11, 8:28 PM EDTSevere Thunderstorm WarningLMKHarrison32 min
May 11, 8:30 PM EDTSevere Thunderstorm WarningINDHendricks, Marion30 min
May 11, 8:33 PM EDTSevere Thunderstorm WarningLMKClark, Floyd, Harrison27 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, 8.9 hours before the alert went out and 162 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 2016-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2016-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
120 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.

IssuedProductOfficeCountiesLasted
May 11, 1:10 PM EDTSevere Thunderstorm WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick12 hr
May 11, 3:19 PM EDTMesoscale DiscussionSPCGibson56 min
May 11, 4:39 PM EDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clay, Crawford, Daviess and 34 more66 min
May 11, 6:30 PM EDTMesoscale DiscussionSPCHarrison, Perry, Posey, Spencer, Vanderburgh, Warrick2 hr
May 11, 7:30 PM EDTSevere Thunderstorm WatchSPCClark, Floyd, Jefferson, Scott7 hr

Nearby

Severe Thunderstorm Watches in Indiana, 2016Every severe thunderstorm watch in 2016

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.