A mixed precipitation event quickly changed over to a heavy, wet snowfall over portions of the region.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ILN wrote it up.
A mixed precipitation event quickly changed over to a heavy, wet snowfall over portions of the region.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Wilmington, OH wrote its last area forecast discussion before the first event at Feb 17, 10:06 AM EST, 54 minutes earlier.
Area Forecast Discussion National Weather Service Wilmington OH 1006 AM EST Sat Feb 17 2018 .SYNOPSIS... An area of low pressure will move just southeast of the region today while an upper level disturbance moves toward the Great Lakes. The upper level disturbance will move away from the region tonight. High pressure will allow for dry conditions on Sunday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... An upper level s/wv will approach the Great Lakes region from the west today. The combination of a developing low to mid level jet and upper divergence from the RR Quad of an enhancing upper level jet will bring likely to categorical PoPs to much of the forecast area. The northern periphery of the advancing precipitation field may start briefly as snow or a rain/snow mix. Then, it should transition to mostly rain by the mid afternoon hours. Little snow accumulation is expected. Highs will range from the upper 30s to around 40. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/... Precipitation will still be ongoing at the start of the near term with an upper level disturbance moving across northern portions of the region. This feature will allow for some snow to mix in with the rain. With temperatures still in the 30s do not expect much in the way of accumulation. Precipitation will then taper off overnight, however some cloud cover will remain. High pressure will then work into the region for the day on Sunday. WAA on Sunday and plenty of sunshine will allow temperatures to climb into the middle 40s to the lower 50s. Went close to guidance for temperatures on Sunday. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... A warm front will lift north across the area late Sunday night into Monday morning. This will result in early lows Sunday night and then rising temperatures. In addition, showers will develop and occur ahead of the warm front. Initially, better chance of precipitation will be in the western counties but then this shifts across the northern counties on Monday. In amplified upper level flow, frontal boundary to the west of the region will be slow to move into the area. GFS has been more progressive with this front, and while this cannot totally discounted, have leaned towards slower ECMWF which has some support from the Canadian. Rainfall will be focused closer to the front on Tuesday with the greatest rainfall threat in the northwest counties. This will then transition to more of a post-frontal precipitation event which will translate across the region Tuesday night into Wednesday night. Precipitable water is forecast to be very high, greater than 200 percent of normal, so showers could be quite efficient rain producers. The ground will be wet from previous rainfall, so the threat of additional flooding is still a concern. Ahead of the front, the airmass will be very warm and record temperatures are possible on Tuesday. Given current frontal timing, after morning highs temperatures will be falling during the day Wednesday. High pressure will briefly build in for Thursday. But the chance of showers will return on Friday as another warm front pushes into the area. Temperatures will be slightly above normal for the latter part of the week. && .AVIATION /15Z SATURDAY THROUGH WEDNESDAY/... An area of low pressure will move southeast of the TAF sites today and an upper level disturbance will move through later today. These two features will bring precipitation to the region today into this evening. Precipitation will generally be in the form of rain to start out until the temperature profile gets cool enough with the upper level disturbance for some snow to also be possible across the region. Although precipitation is not expected to be heavy, where snow occurs visibilities will likely be reduced. Cigs will range from MVFR to IFR. OUTLOOK...MVFR conditions are possible at times from Monday through Wednesday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Hickman NEAR TERM...Hickman SHORT TERM...Novak LONG TERM... AVIATION...Novak
Hazardous Weather Outlook National Weather Service Wilmington OH 336 AM EST Sat Feb 17 2018 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-181000- Wayne-Fayette IN-Union IN-Franklin IN-Ripley-Dearborn-Ohio- Switzerland-Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant- Pendleton-Bracken-Robertson-Mason-Lewis-Hardin-Mercer-Auglaize-Darke- Shelby-Logan-Union OH-Delaware-Miami-Champaign-Clark-Madison- Franklin OH-Licking-Preble-Montgomery-Greene-Fayette OH-Pickaway- Fairfield-Butler-Warren-Clinton-Ross-Hocking-Hamilton-Clermont-Brown- Highland-Adams-Pike-Scioto- 336 AM EST Sat Feb 17 2018 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Northeast Kentucky, Northern Kentucky, Central Ohio, South Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...Today and Tonight. Some river flooding will persist today. Please check our web site at www.weather.gov/iln for more information on the river flooding. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Additional rainfall is expected Tuesday into Wednesday night. This will lead to rises on area creeks and streams, along with the potential for flooding, including at locations along the Ohio River. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
7 winter weather. Local standard time, as filed.
The EMA measured 3 inches of snow near Sciotodale. The county garage in Lucasville measured 2 inches.
The county garage north of Wakefield measured 2.5 inches of snow.
The county garage in Georgetown measured 2.5 inches of snow. The CoCoRaHS observer south of Fayetteville measured 0.8 inches of snow.
The county garage in West Union measured 2 inches of snow.
The county garage in Hillsboro measured 2 inches of snow.
The county garage in Amelia measured 1.5 inches of snow.
A spotter located 3 miles west of Cheviot measured an inch of snow. Another near White Oak measured 0.8 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2018Every state in 2018This day in weather historyWarnings in Ohio, February 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 741224, 741225, 741226, 741227, 741228, 741229, 741230.