An ice storm hit the Ohio Valley, beginning late in the evening of January 31st. Low pressure traced from Texas to the lower Great Lakes region, and strengthened as it crossed the Ohio Valley. The precipitation over northern portions of the region began as a snow and sleet mix and changed over to freezing rain, while along and immediately south of the I-70 corridor was all freezing rain. An estimated quarter million power outages were blamed on the storm which brought upwards of a half inch to inch of ice, along with several inches of sleet accumulation to central and west central Ohio and the Whitewater Valley of Indiana.
Warmer temperatures southeast of the I-71 corridor led to little if any freezing precipitation. Overnight, ice melted east of I-75 as temperatures in the warm sector ahead of the cold front rose well into the 40s and reached 50 degrees in some locations.

Ice Storm in WARREN, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Department of Highways

A half inch of ice was measured 3 miles south of Springboro. In and around Lebanon, NWS employees measured a quarter and three tenths of an inch of ice.

Ice Storm in CLINTON, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Department of Highways

A half inch of ice was measured in Sabina. A spotter 4 miles west of Wilmington measured three tenths of an inch of ice, while the cooperative observer 3 miles north of town measured .18 inches.

Ice Storm in MERCER, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Emergency Manager

A wintery mix of heavy sleet, snow, and ice caused significant disruption to the area. Sleet accumulations were reported up to two inches, and snow also accumulated to the same depth. Icy glazes of a tenth to two tenths of an inch were also reported.

Ice Storm in AUGLAIZE, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Emergency Manager

A wintery mix of heavy sleet, snow, and ice caused significant disruption to the area. Sleet accumulations were reported up to two inches, and snow also accumulated to the same depth. Icy glazes of a tenth of an inch was also reported.

Ice Storm in HARDIN, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Emergency Manager

A wintery mix of heavy sleet, snow, and ice caused significant disruption to the area. Sleet accumulations were reported up to two inches, and snowfall was measured as deep as four inches. Icy glazes of a tenth of an inch was also reported.

Ice Storm in MADISON, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Law Enforcement

A half inch of ice was measured in London.

Winter Weather in BROWN, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

One tenth of an inch of ice was measured in Mount Orab, and was noted to not be forming on roadways. Non-freezing rain occurred over the majority of the southern part of the county.

Ice Storm in SHELBY, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Emergency Manager

A quarter inch of ice was measured in Sidney.

Ice Storm in LOGAN, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Law Enforcement

A wintery mix of heavy sleet, mixed with snow and ice caused significant disruption to the area. In Bellefontaine, two tenths of an inch of ice and three inches of sleet was measured.

Ice Storm in FRANKLIN, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Broadcast Media

Nine tenths of an inch of ice was measured by the media in Columbus. A half inch was measured by a NWS employee in Grove City and by a spotter in Columbus. Four tenths was measured in Worthington by a spotter.

Ice Storm in FAIRFIELD, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Four tenths of an inch of ice was measured by a spotter in Baltimore. The emergency manager in Lancaster measured two tenths of an inch.

Winter Weather in HIGHLAND, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Emergency Manager

An eighth of an inch of ice was measured in Hillsboro with no widespread issues noted across the county.

Winter Weather in ADAMS, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: COOP Observer

One tenth of an inch of ice was measured 6 miles east northeast of West Union.

Ice Storm in DARKE, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Law Enforcement

A wintery mix of heavy sleet, mixed with snow and ice caused significant disruption to the area. Arcanum measured six tenths of an inch of ice, while a half inch was measured by spotters in both Greenville and two miles north of Gettysburg. Three inches of heavy sleet fell in spots. Trees and power lines were downed and several transformers were reported to be on fire at various locations across the county.

Ice Storm in PREBLE, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Department of Highways

Eight tenths of an inch of ice was reported in Eaton late in the evening. Earlier that morning the emergency manager south of town measured a quarter inch of ice.

Ice Storm in MIAMI, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

A third of an inch of ice was measured by various spotters in Tipp City and in Troy later in the evening.

Ice Storm in FAYETTE, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Two tenths of an inch of ice was measured in Washington Court House by a spotter. The emergency manager measured a tenth. Significantly higher ice accumulations occurred in the northwest part of the county.

Ice Storm in CHAMPAIGN, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Law Enforcement

A half inch of ice was measured in Urbana. A quarter inch was measured by the cooperative observer 2 miles northeast of Saint Paris.

Ice Storm in CLARK, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Six tenths of an inch of ice was measured in Springfield. The cooperative observer northwest of Springfield measured .39 inches of ice.

Ice Storm in FAYETTE, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Law Enforcement

A quarter inch of ice in Commercial Point caused state route 726 to be impassable early in the day. Two tenths of an inch of ice was measured in Circleville late in the evening.

Ice Storm in BUTLER, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Seven tenths of an inch of ice was measured in Oxford. The emergency manager in Oxford measured a half inch, as did a spotter in Liberty Township.

Ice Storm in GREENE, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Six tenths of an inch of ice was measured in Springfield. The cooperative observer northwest of Springfield measured .39 inches of ice.

Ice Storm in DELAWARE, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Three quarters of an inch of ice was measured in Delaware. Two separate couples were taken to area hospitals and treated for carbon monoxide poisoning at local hospitals. They were both running generators due to power outages from the storm, one in an enclosed garage.

Ice Storm in LICKING, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Emergency Manager

Two tenths of an inch of ice caused significant interruptions across the county.

Winter Weather in HOCKING, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: COOP Observer

The observer in Laurelville measured .15 inches of ice while the EMA in Logan reported a thinner glaze of about .05 inches.

Ice Storm in HAMILTON, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Four tenths of an inch of ice was measured 5 miles northwest of Cincinnati. Another spotter in Sharonville measured three tenths, while a quarter inch was recorded by the emergency manager in Bridgetown.

Winter Weather in ROSS, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Emergency Manager

A thin glaze of about .05 inches was measured in Chillicothe.

Winter Weather in CLERMONT, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Department of Highways

Two tenths of an inch of ice was measured in Batavia, and was noted to not be forming on roadways.

Ice Storm in UNION, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Law Enforcement

Three quarters of an inch of ice was measured in Marysville. Four households in a cul-de-sac were evacuated when fires broke out from a power surge due to downed power lines.

Ice Storm in MONTGOMERY, OHIO
From 01-FEB-11 00:00:00 to 02-FEB-11 02:00:00 (EST-5)
Reported by: Trained Spotter

Eight tenths of an inch of ice was reported in Union. Six tenths was measured in Dayton. A half inch was reported 2 miles northeast of Dayton, in Centerville, and in Vandalia. An Ohio State Highway Patrol Trooper and his wife were killed when they ran a generator in their garage and were overcome by CO poisoning.