Freeze Warning issued April 19 at 7:44PM EDT until April 20 at 10:00AM EDT by NWS Wilmington OH (details ...)
* WHAT...Sub-freezing temperatures as low as 30 expected.
* WHERE...Portions of east central and southeast Indiana and central, south central, southwest, and west central Ohio.
* WHEN...From 2 AM to 10 AM EDT Monday.
* IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
30° 30° isolated widespread frost Mon 52° Mon 52° widespread frost 36° 36° patchy frost Tue 74° Tue 74°
Wednesday, February 21st, 2007
Freezing fog
Photo by Dave Heirholzer/The Daily Standard

Hoar frost creates a pretty scene in Celina this morning - along with slick sidewalks and driveways. Hoar frost is white ice crystals that form when the air is moist and the surface is cold, according to Wikipedia.

Additional pictures on this date