A cold front crossed south through the region during the evening of the 6th. In the cold air behind it, rain changed over to snow with some light accumulations occurring across the region.
Every event with a place to put it; 18 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 cold front crossed south through the region during the evening of the 6th. In the cold air behind it, rain changed over to snow with some light accumulations occurring across 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 Apr 6, 9:37 PM EST, 23 minutes earlier.
Area Forecast Discussion National Weather Service Wilmington OH 1037 PM EDT Fri Apr 6 2018 .SYNOPSIS... A cold front will move south of the area this evening with mixed rain and snow through Saturday morning, particularly near and south of the Ohio River. Below normal temperatures are expected through early next week, with another round of precipitation possible Sunday night. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... Surface cold front has cleared the zones this evening with a band of rain/snow forming along the 850/700 MB front. Overnight the 850/700 MB front will start to wash out and with little to no upper level support (only weak WAA and no PVA) the band of snow will likely slowly weaken through the evening. Early Saturday morning an upper level disturbance will cross the area south of the region allowing another band of snow to form southwest to northeast just south of Interstate 71. The band will drift southeast with snowfall totals of one to two inches possible across the far southeast and less than one inch everywhere else. Prev Discussion-> Mosaic radar returns continue to blossom across the Ohio Valley this afternoon, although with a good deal of dry air near the surface, much of it is struggling to reach the ground -- at least initially. As of this writing, the cold front is oriented approximately from Delaware Ohio southwestward through Batesville Indiana with gusty northwest winds gradually overspreading the northwestern third or so of the ILN FA. Ahead of the front, fairly robust warm air advection, coupled with filtered April sunshine, has allowed temperatures to warm into the lower 60s in parts of northern Kentucky and southern Ohio (with even a few mid 60s in the lower Scioto Valley and northeastern Kentucky). Do think that highs have largely already been reached today as cloud cover continues to thicken and the front shifts southeastward. As alluded to above, low level dry air should initially inhibit precipitation from reaching the ground, despite increasing radar returns expected through the afternoon and early part of the evening. However, the column will eventually become saturated enough to support measurable precipitation, mainly for the southern three quarters of the ILN FA. At least one or two broken banding features are expected to develop/materialize this evening in a post-frontal environment characterized by dropping surface temperatures and a gradual moistening up of the low levels. Hi- res solutions continue to depict a myriad of solutions in terms of where exactly these band(s) may set up, but the best organization will likely occur south of the I-70 corridor this evening. Did include at least chance PoPs for the entire area, with likely PoPs near the I-71 corridor with categorical PoPs closer to the Ohio River by late this evening. One or more bands of light rain/snow will gradually shift southward this evening, with a transition to all snow expected from north to south with nearly all precipitation expected to be snow after midnight. After this point, a more or less broad band may set up from northern Kentucky east-northeastward through the lower Scioto Valley through the end of the near term period. With the latest data indicating that this may be favored a bit further north than some of the earlier solutions, decided to bump up forecast snow totals just a tad in parts of northern Kentucky to account for this potential period of steadier /albeit light/ snowfall. Aside from the aforementioned wintry precip concerns, a freeze warning has been issued for locations where the Frost/Freeze program has already been initiated as temperatures will drop below freezing area-wide late tonight. Temperatures may fall into the mid 20s for portions of the Miami Valley by daybreak Saturday. Gusty northwest winds are expected area wide this evening along and behind the front before winds relax towards the end of the near term period. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... As the developing surface low tracks across southern portions of the Tennessee Valley at the beginning of the short term period, an additional light band of snow or rain may try to linger and/or be reintroduced in the far southern portions of the ILN FA into central Kentucky through Saturday morning. As such, have lingered PoPs several hours longer than previous fcst cycles as precipitation may be slow to leave the extreme southeastern portions of the local area. Even so, low level thermal profiles may warm quickly enough by mid morning to change all precipitation back over to some light rain or at least a rain/snow mix. By Saturday afternoon, expect that all precipitation will have vacated, or will soon vacate, the ILN FA. In total (including the near term period), expect an inch or less of snow accumulation near I-71 in Ohio, with little to no snow for points north and west of this corridor. Further to the southeast, 1 to 2 inches of snow are possible, particularly in south-central Ohio and a tier or two of counties south of the Ohio River. Most of this accumulation will be on grassy and elevated surfaces as road/ground temperatures will lag behind the surface cold air advection. With this in mind, a few slick spots cannot be completely ruled out in south-central Ohio and northern Kentucky Saturday morning, particularly on bridges and overpasses. A Special Weather Statement has been issued to cover the areas where an inch of snow is still in the forecast. As the system begins to pull away Saturday afternoon, skies will gradually clear and drier conditions will return area-wide. With surface high pressure settling in Saturday night (with clearing skies and relatively light surface flow), a fairly cold night will evolve, with lows in the low to mid 20s area-wide. Have continued frost in wx grids for Frost/Freeze areas, but a freeze warning will again be warranted Saturday night. && .LONG TERM /SUNDAY THROUGH FRIDAY/... In northwest flow aloft, a series of weak short waves will drop down across the region Sunday through Monday night. The strongest of these will affect the region Sunday night and will allow for precipitation to overspread our area early Sunday evening and then continue through Sunday night. Highs on Sunday will be in the low to mid 40s. Thermal profiles support mainly snow Sunday night but the low levels may still be warm enough to allow for a brief mix with rain at pcpn onset. Given the warm ground temperatures and relatively light QPF amounts, would expect any snow accumulations to be generally less than an inch and mainly on grassy/elevated surfaces. Some light precipitation may linger into the day on Monday but we may be in a bit of a lull through much of the day. However, another weak short wave will bring an increasing chance of precipitation across mainly the north later in the day and into Monday night. Highs on Monday will be in the mid 40s to lower 50s so any pcpn during the day and into early Monday evening should be rain. However, once again as we cool off at night, any pcpn will likely mix with/change to snow, especially across the north. A drier airmass will work into the region Tuesday into Wednesday before another short wave moving across the Great Lakes region brings a chance of rain showers for Thursday. Temperatures will begin to moderate with high temperatures pushing into the 60s toward the end of the long term period. && .AVIATION /02Z SATURDAY THROUGH WEDNESDAY/... Surface cold front is currently pushing its way across central Ohio with a band of rain/snow accompanying the passage. Behind the front the rain/snow mix is quickly changing over to all snow. Visibilities and ceilings will likely be reduced down to MVFR with some restrictions down to IFR. Overall thinking is that any restrictions down to IFR will be transient with mainly restrictions keeping at MVFR. As the surface cold front slowly pushes southeast so will the precipitation. The initial band with the cold front will likely start to weaken as surface convergence washes out. More light snow will redevelop though soon after as a secondary shortwave pulls east across the region. Overall thinking is this second batch of precipitation will effect KCVG/ KLUK with the rest of the TAF sites being to far north. The track of the shortwave will make this close though. The cut off will likely be right around the Interstate 71 corridor. Saturday morning the snow will begin to exit along with the upper level shortwave meaning all TAF sites will quickly go VFR. OUTLOOK...MVFR conditions are possible from Sunday night through Monday night. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...Freeze Warning from 2 AM to 11 AM EDT Saturday for KYZ089>100. IN...Freeze Warning from 2 AM to 11 AM EDT Saturday for INZ075-080. && SYNOPSIS...KC/Haines NEAR TERM...KC/Haines SHORT TERM...KC LONG TERM...JGL AVIATION...Haines
Hazardous Weather Outlook National Weather Service Wilmington OH 1021 PM EDT Fri Apr 6 2018 INZ050-058-059-066-OHZ026-034-035-042>046-051>056-060>062-070-080230- Wayne-Fayette IN-Union IN-Franklin IN-Hardin-Mercer-Auglaize-Darke- Shelby-Logan-Union OH-Delaware-Miami-Champaign-Clark-Madison- Franklin OH-Licking-Preble-Montgomery-Greene-Butler- 1021 PM EDT Fri Apr 6 2018 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ073-074-OHZ063>065-071>074-077>082-088-080230- Ripley-Dearborn-Fayette OH-Pickaway-Fairfield-Warren-Clinton-Ross- Hocking-Hamilton-Clermont-Brown-Highland-Adams-Pike-Scioto- 1021 PM EDT Fri Apr 6 2018 This Hazardous Weather Outlook is for Southeast Indiana, Central Ohio, South Central Ohio and Southwest Ohio. .DAY ONE...Tonight. Light snowfall accumulations of around an inch are expected tonight through Saturday morning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report snowfall totals to the National Weather Service INZ075-080-KYZ089>100-080230- Ohio-Switzerland-Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant- Pendleton-Bracken-Robertson-Mason-Lewis- 1021 PM EDT Fri Apr 6 2018 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 11 AM EDT SATURDAY... This Hazardous Weather Outlook is for Southeast Indiana, Northeast Kentucky and Northern Kentucky. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Freeze Warning. Light snowfall accumulations of an inch or two are expected tonight through Saturday morning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Freeze Warning. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report snowfall totals to the National Weather Service.
Special Weather Statement National Weather Service Wilmington OH 1017 PM EDT Fri Apr 6 2018 INZ073>075-080-KYZ090>093-OHZ063>065-071>074-077>080-082-070900- Ripley-Dearborn-Ohio-Switzerland-Gallatin-Boone-Kenton-Campbell- Fayette OH-Pickaway-Fairfield-Warren-Clinton-Ross-Hocking- Hamilton-Clermont-Brown-Highland-Pike- Including the cities of Batesville, Milan, Versailles, Lawrenceburg, Aurora, Rising Sun, Vevay, Warsaw, Florence, Burlington, Oakbrook, Covington, Erlanger, Independence, Newport, Alexandria, Washington Court House, Circleville, Lancaster, Pickerington, Mason, Lebanon, Springboro, Wilmington, Blanchester, Chillicothe, Logan, Cincinnati, Milford, Georgetown, Mount Orab, Hillsboro, Greenfield, Waverly, and Piketon 1017 PM EDT Fri Apr 6 2018 ...LIGHT SNOW EXPECTED TONIGHT INTO SATURDAY MORNING... Light rain will develop this afternoon into this evening eventually mixing with and changing to snow. Snow accumulations of up to an inch will be possible through early Saturday morning, mainly on raised surfaces and grassy areas. KYZ089-094>100-OHZ081-088-070900- Carroll-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis-Adams- Scioto- Including the cities of Carrollton, Owenton, Williamstown, Crittenden, Dry Ridge, Falmouth, Butler, Augusta, Brooksville, Mount Olivet, Maysville, Vanceburg, Tollesboro, West Union, Peebles, Portsmouth, and Wheelersburg 1017 PM EDT Fri Apr 6 2018 ...LIGHT SNOW EXPECTED TONIGHT INTO SATURDAY MORNING... Light rain will develop this evening, changing to snow during the early overnight hours. Snow accumulations of an inch or two will be possible through Saturday morning, mainly on raised surfaces and grassy areas.
Special Weather Statement National Weather Service Wilmington OH 1028 PM EDT Fri Apr 6 2018 INZ073>075-080-KYZ090>093-OHZ063>065-071>074-077>080-082-070900- Ripley-Dearborn-Ohio-Switzerland-Gallatin-Boone-Kenton-Campbell- Fayette OH-Pickaway-Fairfield-Warren-Clinton-Ross-Hocking- Hamilton-Clermont-Brown-Highland-Pike- Including the cities of Batesville, Milan, Versailles, Lawrenceburg, Aurora, Rising Sun, Vevay, Warsaw, Florence, Burlington, Oakbrook, Covington, Erlanger, Independence, Newport, Alexandria, Washington Court House, Circleville, Lancaster, Pickerington, Mason, Lebanon, Springboro, Wilmington, Blanchester, Chillicothe, Logan, Cincinnati, Milford, Georgetown, Mount Orab, Hillsboro, Greenfield, Waverly, and Piketon 1028 PM EDT Fri Apr 6 2018 ...LIGHT SNOW TONIGHT INTO SATURDAY MORNING... Rain and snow will continue this evening before changing over to all snow. Snow accumulations of up to an inch will be possible through early Saturday morning, mainly on raised surfaces and grassy areas. KYZ089-094>100-OHZ081-088-070900- Carroll-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis-Adams- Scioto- Including the cities of Carrollton, Owenton, Williamstown, Crittenden, Dry Ridge, Falmouth, Butler, Augusta, Brooksville, Mount Olivet, Maysville, Vanceburg, Tollesboro, West Union, Peebles, Portsmouth, and Wheelersburg 1028 PM EDT Fri Apr 6 2018 ...LIGHT SNOW TONIGHT INTO SATURDAY MORNING... Rain and snow will continue this evening before changing over to all snow. Snow accumulations of an inch or two will be possible through Saturday morning, mainly on raised surfaces and grassy areas.
The national radar mosaic for the moment the first event began.
18 winter weather. Local standard time, as filed.
The observer 6 miles east of West Union measured 0.7 inches of snow.
The observer in Fayetteville measured a half inch of snow.
The observer in Hamilton measured a half inch of snow.
The observer 2 miles northeast of St. Paris measured a half inch of snow.
The observers in Enon and north of Springfield, along with a cooperative observer in Springfield all measured 0.6 inches of snow.
The observers in 3 miles west of Bethel measured 1.1 inches of snow.
The NWS office in Wilmington measured 0.9 inches of snow. CoCoRaHS observers 2 miles north and 1 mile south-southeast of town both measured 0.7 inches, while the cooperative observer 3 miles north of Wilmington measured a half inch.
The CoCoRaHS observer 2 miles northwest of Bradford measured a half inch of snow.
The CoCoRaHS observer 3 miles northwest of Dublin measured 0.7 inches of snow, while another 4 miles east-northeast of Powell measured a half inch.
The CoCoRaHS observer in Clifton measured 1.2 inches of snow while another 3 miles east of Yellow Springs measured an inch. Other observers near Fairborn and Bellbrook measured a half inch of snow.
The CoCoRaHS observer in Mack South and the cooperative observer 3 miles west of Cheviot measured an inch of snow. Another CoCoRaHS observer in Northbrook measured 0.7 inches of snow.
The CoCoRaHS observer 2 miles north of Alexandria measured 1.2 inches of snow. Other observers north of Granville measured an inch, with another located 4 miles west of Saint Louisville measuring a half inch.
The CoCoRaHS observer 2 miles northwest of Tipp City measured a half inch of snow.
A NWS employee 4 miles south of Centerville measured 1.1 inches of snow. The CoCoRaHS observer northwest of Huber Heights measured a half inch of snow, while the Dayton airport DAY measured 0.4 inches of snow.
The observer northwest of Circleville measured an inch of snow.
The observer in Lucasville measured a half inch of snow.
The observer southeast of West Mansfield measured a half inch of snow.
The observer in Kings Mills measured 0.6 inches of snow.
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, April 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: 746094, 746095, 746096, 746097, 746098, 746099, 746100, 746101, 746102, 746103, 746104, 746105, 746106, 746107, 746108, 746109, 746110, 746111.