UPDATE, 7:15 p.m.: A severe thunderstorm warning remains in effect until 7:45 p.m. for northeastern Livingston, southern Monroe, northeastern Genesee and northwestern Ontario counties.

At 7:08 p.m., a severe thunderstorm was located near Byron, or 10 miles south of Brockport, moving east at 30 mph. Radar indicated 60 mph wind guests and quarter-size hail.

Locations to be affected include Caledonia, Lima, Scottsville, Churchville, Honeoye Falls, Henrietta, Victor, Bristol, Bloomfield and Farmington. Also include are Interstate 390 between exits 11 and 12, and Interstate 90 between exits 47 and 44.

The Weather Service advises that a tornado and hail are possible with this storm.

UPDATE, 6:45 p.m.: The National Weather Service has issued a severe thunderstorm warning until 7:45 p.m. that includes northeastern Livingston and northeastern Genesee counties.

The warning also includes southern Monroe and northwestern Ontario counties.

At 6:37 p.m., a severe thunderstorm was located near Le Roy, or 11 miles east of Batavia, moving east at 25 mph.

Weather Service radar indicated 60 mph wind gusts and penny-size hail. Damage to roofs, siding and trees is possible.

Locations to be affected include Le Roy, Caledonia, Avon, Lima, Scottsville, Churchville,  Henrietta, Honeoye Falls, Victor, and Bristol. This includes Interstate 390 between exits 10 and 12, and Interstate 90 between exits 47 and 44.

The Weather Service is advising of the possibility of a tornado and three-quarter inch hail.

ORIGINAL STORY:

The National Weather Service has issued a severe thunderstorm warning for southern Orleans County and Genesee County until 6:30 p.m.

At 5:42 p.m., a severe thunderstorm was located near Oakfield, or 10 miles south of Medina, moving eat at 25 mph.

Weather Service radar indicated 60 mph wind gusts and penny-size hail. Expect damage to roofs, siding and trees.

Locations to be affected include Batavia, Le Roy, Pembroke, Byron, Oakfield, Stafford, Alabama,

Bergen, Elba and East Bethany. Also included is Interstate 390 between exits 48A and 47.

The Weather Service that conditions could cause a tornado.