A surface boundary combined with a fast moving upper level wave of energy brought accumulating snow to the region.
Every event with a place to put it; 25 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 surface boundary combined with a fast moving upper level wave of energy brought accumulating snow to 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 27, 6:32 PM EST, 1 hour 28 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 632 PM EST Thu Feb 27 2020 .SYNOPSIS... Several upper level disturbances will move across the region through Friday keeping off and on precipitation chances in the forecast. Dry conditions are expected for the weekend before an unsettled and wet pattern develops for next week. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... Flurries and isolated snow showers will start out the evening. A boundary will work through overnight. Models have come into better agreement on developing bands of snow overnight, however there is still some uncertainty on the exact placement of these bands. In general expect around an inch or less of snow overnight. Decided to hold off on an sps for now until the bands start to develop in order to have better placement, however did add mention in the HWO due to quick snowfall rates and cool pavement temperatures overnight. Winds will be gusty through the evening hours. During the overnight hours there will still be some wind gusts, however expect them to be more isolated in nature. With the combination of falling temperatures and winds, wind chill values will drop into the single digits across a large portion of the region. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/... The one wave of snow will be moving out at the start of the short term, however additional snow showers will be possible near and south of the Ohio River later in the day on Friday into the first part of Friday night as another disturbance moves through. Minor snowfall accumulations will be possible. In addition cannot rule out some light snow showers or flurries across the northern portions of the forecast area with winds off of the lake. Friday night expect another cold night with wind chill values in the single digits expected once again. && .LONG TERM /SATURDAY THROUGH THURSDAY/... Northwest flow aloft with surface high pressure building across the area Saturday. This high will offer dry weather and continued colder than normal temperatures. Saturday's highs to range from near 30 northeast to near 40 southwest. Long wave trof shifts east with mid level ridging/height rises building into the region Sunday. This will provide a moderation of temperatures. Readings look to warm above normal with Sunday's fcst highs from 50 north to the upper 50s south. Model solutions fairly consistent with mid level flow backing westerly and embedded s/w and WAA leading to a chance of pcpn late Sunday night into Monday. Warm temperatures with highs Monday in the mid and upper 50s. Rain chances increase as flow backs southwesterly and slow moving surface front pushes into the area Tuesday. Favorable moisture transport develops, with the potential for a prolonged period of rain - pointing to a signal for heavy rain. Considerable model solution spread continues to be observed regarding the details of where the heavy rain sets up. Deterministic model runs have trended south with the heaviest rain axis. At this time the most favored region looks to be over ILN/s southern counties, but a fair amount of uncertainty exists regarding the exact placement of this heavy rain axis. On the warm side of the system, expect Tuesday and Wednesday's highs from the lower 50s northwest to the lower 60s southeast. A general drying trend next Thursday with surface low and frontal boundary shifting to the east. Temperatures to trend closer to normal with highs from the lower 40s northwest to near 50 southeast. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... Looks like more light snow with MVFR conditions tonight as a weak trough of low pressure travels from the west. Latest models suggest a band of light snow developing near Dayton, then moving southward to affect all TAF sites. Ceilings and visibilities will improve early Friday while snow ends as drier air filters in behind the trough. Winds will subside to around 10 knots overnight out of the west, with speeds rising again on Friday, with gusts to 25 knots possible at northern sites DAY ILN CMH and LCK. OUTLOOK...MVFR conditions possible Monday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Novak NEAR TERM...Novak SHORT TERM...Novak LONG TERM...AR AVIATION...Coniglio
Hazardous Weather Outlook National Weather Service Wilmington OH 355 PM EST Thu Feb 27 2020 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-282100- 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- 355 PM EST Thu Feb 27 2020 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...This afternoon and tonight. Quick moving narrow bands of snow will move through overnight. While amounts are generally expected to be around an inch or less, the quick accumulation rate and cool pavement temperatures could lead to slick spots on area roadways. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement National Weather Service Wilmington OH 712 PM EST Thu Feb 27 2020 INZ050-058-059-066-OHZ042-051>055-060>065-070>074-280515- Wayne-Fayette IN-Union IN-Franklin IN-Darke-Miami-Champaign-Clark- Madison-Franklin OH-Preble-Montgomery-Greene-Fayette OH-Pickaway- Fairfield-Butler-Warren-Clinton-Ross-Hocking- Including the cities of Richmond, Connersville, Liberty, West College Corner, Brookville, Greenville, Troy, Piqua, Tipp City, Urbana, Springfield, London, West Jefferson, Plain City, Columbus, Eaton, Camden, Dayton, Kettering, Beavercreek, Fairborn, Xenia, Washington Court House, Circleville, Lancaster, Pickerington, Hamilton, Middletown, Fairfield, Oxford, Mason, Lebanon, Springboro, Wilmington, Blanchester, Chillicothe, and Logan 712 PM EST Thu Feb 27 2020 ...Snow showers expected to bring light accumulations this evening... A band of snow showers is developing this evening roughly along I-70. Light snow accumulations around a half an inch will be possible by 11 pm from Dayton to Columbus. Travel could be affected by reduced visibilities in some of the snow showers, and there may be slick spots on roads. Please exercise extra caution in order to safely reach your destination. BC
The national radar mosaic for the moment the first event began.
25 winter weather. Local standard time, as filed.
An inch of snow fell in Wapakoneta.
The observer in Fayetteville measured 1.1 inches of snow.
The observer in New Carlisle measured a half inch of snow.
The observer in Goshen measured an inch of snow.
The county garage south of Wilmington measured 2 inches of snow. The NWS office measured 1.5 inches, while a NWS employee 4 miles west of town measured 1.1 inches.
The observer near Bradford measured 0.7 inches of snow while another west of Potsdam measured a half inch.
The observer near Lewis Center measured 0.8 inches of snow.
Two reports of 3 inches of snow were gleaned from Stoutsville and Sugar Grove.
A spotter in Washington Court House and a CoCoRaHS observer 4 miles east-southeast of town both measured 2.8 inches of snow.
The CoCoRaHS observer northwest of New Rome measured 1.7 inches of snow.
Two inches of snow was reported from Xenia and near Beavercreek.
Around a half inch of snow fell across the county. The observer located 9 miles northwest of Cincinnati measured 0.7 inches of accumulation.
The county garage in Hillsboro measured an inch of snow.
The observer in Logan measured 2.4 inches of snow while the county garage east of Lake Logan State Park measured 2 inches.
The observer 10 miles east-northeast of Newark measured 1.2 inches of snow while another 4 miles north of Granville measured a half inch.
The observer in Bellefontaine measured a half inch of snow.
A report from London showed that 1.7 inches of snow fell there, while a cooperative observer in London measured 1.5 inches.
The observer in Tipp City measured 0.6 inches of snow.
The observer east of Farmersville measured 2.5 inches of snow. Southern Montgomery county saw 1.5 to 2.5 inches of snow, while the I-70 corridor had an inch or less.
The county garage north of Circleville measured 2.5 inches of snow. The cooperative observer in town measured 2 inches.
The observer north of Eaton measured 1.8 inches of snow.
The observer in Chillicothe measured 1.3 inches of snow, while the county garage north of North Fork Village measured an inch.
The observer near Fort Loramie measured an inch of snow.
The county garage in Marysville measured an inch of snow.
The county garage south of Lebanon and a NWS employee east of Lebanon both measured an inch of snow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2020Every state in 2020This day in weather historyWarnings in Ohio, February 2020
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: 878941, 878942, 878943, 878944, 878945, 878946, 878947, 878948, 878949, 878950, 878951, 878952, 878953, 878954, 878955, 878956, 878957, 878958, 878959, 878960, 878961, 878962, 878963, 878964, 878965.