Alert archive / Indiana / Mesoscale Discussions in 2009

Mesoscale Discussion 211

March 8, 200911 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Mar 8, 2009, 3:20 PM EDT for 11 counties in Indiana. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Mar 8, 2009, 3:20 PM EDT (19:20 UTC)
Expired: Mar 8, 2009, 4:15 PM EDT
In force: 55 min
Issued by: the Storm Prediction Center

Counties Cass County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Jasper County, IN, Lake County, IN, Miami County, IN, Porter County, IN, Pulaski County, IN, Starke County, IN, White County, IN

The radar

The Northern Indiana radar (KIWX), 84 km from the middle of the area, began a volume at 19:21 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.3 hours before the alert went out and 196 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 441 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 389 m²/s²
0-3 km storm-relative helicity: 401 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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
Mar 8, 11:39 AM EDT	Tornado Watch	SPC	Benton, Boone, Carroll, Clay, Clinton, Daviess and 24 more	7 hr
Mar 8, 2:31 PM EDT	Mesoscale Discussion	SPC	Adams, Bartholomew, Blackford, Brown, Clark, Crawford and 39 more	119 min
Mar 8, 2:52 PM EDT	Tornado Watch	SPC	Adams, Allen, Bartholomew, Blackford, Brown, Cass and 45 more	5 hr
Mar 8, 4:14 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 51 more	91 min
Mar 8, 5:36 PM EDT	Mesoscale Discussion	SPC	Clark, Dearborn, Floyd, Harrison, Jefferson, Jennings and 5 more	54 min

Nearby

Mesoscale Discussions in Indiana, 2009 Every mesoscale discussion 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.