Alert archive / Indiana / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 12, NWS Northern Indiana

May 7, 20095 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at May 7, 2009, 9:02 PM EDT for 5 counties in Indiana. It was in force for 58 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: May 7, 2009, 9:02 PM EDT (01:02 UTC)
Expired: May 7, 2009, 10:00 PM EDT
In force: 58 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon

Counties Blackford County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Wells County, IN

The radar

The Northern Indiana radar (KIWX), 90 km from the middle of the area, began a volume at 01:02 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 00:00Z, 1.0 hours before the alert went out and 281 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: 9 J/kg
Mixed-layer CIN: -210 J/kg
Mixed-layer LCL: 1186 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 401 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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.

In the hours before

Special weather statement, May 7, 8:42 PM EDT, 20 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 8:42 PM EDT	Special Weather Statement	IWX	Blackford, Grant, Huntington, Wells	33 min
May 7, 9:15 PM EDT	Special Weather Statement	IWX	Adams, Wells	60 min
May 8, 4:03 PM EDT	Gale Warning	IWX		24 hr
May 7, 9:32 PM EDT	Special Weather Statement	IWX	Allen, Van Wert	58 min
May 7, 10:30 PM EDT	Special Weather Statement	IWX	Allen, Putnam	30 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2009 Every severe thunderstorm warning 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.