Alert archive / Indiana / Freeze Warnings in 2007

Freeze Warning 1, NWS Northern Indiana

April 4, 200721 counties in Indiana; 8 counties in Ohio; 4 counties in Michigan

NWS Northern Indiana issued this freeze warning at Apr 4, 2007, 4:16 AM EDT for 21 counties in Indiana; 8 counties in Ohio; 4 counties in Michigan. It took effect at Apr 4, 2007, 4:02 PM EDT. It was in force for 19 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 4, 2007, 4:16 AM EDT (08:16 UTC)
In effect from: Apr 4, 2007, 4:02 PM EDT
Expired: Apr 5, 2007, 11:00 AM EDT
In force: 19 hr
Issued by: NWS Northern Indiana

All 33 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, LaGrange County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Branch County, MI, Cass County, MI, Hillsdale County, MI, Saint Joseph County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH

The radar

The Northern Indiana radar (KIWX), 38 km from the middle of the area, began a volume at 08:16 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

Detroit, MI (KDTX), launched 00:00Z, 8.3 hours before the alert went out and 233 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: 1512 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 172 m²/s²
0-3 km storm-relative helicity: 196 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 freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Northern Indiana wrote its last area forecast discussion before this freeze warning went out at Apr 4, 4:04 AM EDT, 12 minutes earlier.

Area forecast discussion, Apr 4, 4:04 AM EDT, 12 minutes before

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Hazardous weather outlook, Apr 3, 4:15 PM EDT, 12 hours 1 minute 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
Apr 4, 4:16 AM EDT	Wind Advisory	IWX	Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more	16 hr
Apr 4, 4:02 PM EDT	Freeze Warning	IWX	Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more	45 hr

Nearby

Freeze Warnings in Indiana, 2007 Freeze Warnings in Ohio, 2007 Freeze Warnings in Michigan, 2007 Every freeze warning in 2007

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.