A warm front lifted north across central Ohio causing a line of showers and thunderstorms to develop. Thunderstorms moved across Knox County downing some trees.
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The episode as NWS CLE wrote it up.
A warm front lifted north across central Ohio causing a line of showers and thunderstorms to develop. Thunderstorms moved across Knox County downing some trees.
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 Cleveland, OH wrote its last area forecast discussion before the first event at Jun 15, 5:28 PM EST, 1 hour 30 minutes earlier.
Area Forecast Discussion National Weather Service Cleveland OH 628 PM EDT WED JUN 15 2016 .SYNOPSIS... A warm front will lift north and through the region tonight. An area of low pressure will move in from the northwest and cross the area on Thursday bringing showers and thunderstorms. This will be followed by high pressure for Friday and into the weekend. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... The window is narrowing for any significant thunderstorm development. An isolated shower/thunderstorm still possible primarily across the southeast counties or up along the lake breeze this evening. Then expecting a lull with showers/possible thunder coming back into the picture toward morning as the upper low nears. Did adjust pops and sky cover through the night with this early evening update. Previous discussion... The capped airmass in place over the area is inhibiting late afternoon convection (H700 temperatures around 8C). Skies have broken over most of the western counties with temperatures in the 80s in many areas. Highest temperature readings have been at CLE where some added downslope and break in the clouds have pushed temps to 88F. The dew points have jumped to around 70F in the west as the warm front moves into the area. The Storm Prediction Center still has a large portion of the area in a slight risk for severe weather. The forecast shear values appear marginal however the high capes could be sufficient for severe mainly in the west. Forecast soundings indicate the potential for the cap to break around 20z- 22z. The eastern half of the forecast area has been insulated by the clouds and still has dew points in the 50s, which will keep out any threat for strong/severe storms. In the west the best chance for strong storms will be if any development upstream and advects in before 00z. Have isolated showers in the east and a brief window of scattered showers and thunderstorms in the west. Overall have downplayed the potential convection given the strong cap and limited area of high instabilities in the area. There will lull in activity as weak subsidence move in overnight. Meanwhile, an area of low pressure will move towards the area from the Northwest, increasing rain chances by Thursday morning. Temperatures will cool very little overnight as the warm front and moisture advection prevent lows from dipping much below 70. In the east temperatures could cool early and then warm before daybreak. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY NIGHT/... A short wave rounding the top of the upper ridge will dive southeast overnight. This will provide enough dynamics to bring rain showers to the area for Thursday. By the afternoon the cool air aloft will help destabilize the area and we can expect thunderstorms. By peak heating the low placement will support the best chance for strong storms in the southeast counties (note SPC outlook for day 2). The day will be mostly cloudy with a better chance for sun in the far west. The humidity will be high throughout the day but the clouds should hold temperatures around 80F. Some brief heavy rain will be possible with any of the stronger storms. The low will make slow progression towards the east coast Thursday Night followed by high pressure and fair weather for the end of the work week. Temperatures will be cooler Friday with a notable drop in the humidity, with a gradual warming the next couple days under mostly sunny skies. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... A typical summer pattern is expected most of the period with upper ridging at the start of the period. Sunday and Monday will be quiet with slightly above normal temperatures. A cold front will sag south across the area Monday night and Tuesday. Rain chances will increase at that time. The models are fairly similar in this depiction. Will try to dry things out Tuesday evening with dry weather on Wednesday as high pressure briefly builds back across the area. && .AVIATION /18Z Wednesday THROUGH Monday/... Not much going on at the moment with just a few showers at the southern end of the area. There is also not much going on upstream and have made significant changes to the new TAFs. Most if not the entire area will remain dry through the evening hours as the warm front has been slow to move north. The region is also mostly capped by warm temps in the mid layers so new development overhead is also unlikely. Do think some convection will fire to the west and then pass mainly southwest of the area. Will give a brief mention at KFDY. Better chances for precip will come toward the end of the period as the surface low heads this way. Northern locations could see some rain by 18z Thursday but more widespread showers will probably hold off till the low arrives tomorrow afternoon. Winds will become southwest most areas this afternoon. A lake breeze is likely at KERI in a couple of hours. Outlook...Non VFR at times late Thursday in showers and thunderstorms. && .MARINE... Easterly winds continue on the lake but should become southerly as a warm front finally lifts across the lake. Low pressure will pass to the south of the lake on Thursday and this will cause the flow to return to a north or northeast direction by Thursday evening. Speeds and waves may briefly get close to small craft criteria Thursday night. Northeast flow will continue into Saturday and then become east as high pressure settles over the Central Great Lakes. The high will remain overhead most of the weekend and then shift to the Carolina coast for the start of the new workweek. Southerly flow will return at that time. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && SYNOPSIS...Jamison NEAR TERM...Jamison/Oudeman SHORT TERM...Jamison LONG TERM...Kubina AVIATION...Kubina MARINE...Kubina
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CLEVELAND OH 322 PM EDT WED JUN 15 2016 LEZ142>145-162>165-OHZ003-006>010-017>020-027>031-036>038-047-161930- LAKE ERIE NEARSHORE WATERS FROM MAUMEE BAY TO RENO BEACH OH- LAKE ERIE NEARSHORE WATERS FROM RENO BEACH TO THE ISLANDS OH- LAKE ERIE NEARSHORE WATERS FROM THE ISLANDS TO VERMILION OH- LAKE ERIE NEARSHORE WATERS FROM VERMILION TO AVON POINT OH- LAKE ERIE OPEN WATERS FROM MAUMEE BAY TO RENO BEACH OH- LAKE ERIE OPEN WATERS FROM RENO BEACH TO THE ISLANDS OH- LAKE ERIE OPEN WATERS FROM THE ISLANDS TO VERMILION OH- LAKE ERIE OPEN WATERS FROM VERMILION TO AVON POINT OH-LUCAS-WOOD- OTTAWA-SANDUSKY-ERIE-LORAIN-HANCOCK-SENECA-HURON-MEDINA-WYANDOT- CRAWFORD-RICHLAND-ASHLAND-WAYNE-MARION-MORROW-HOLMES-KNOX- 322 PM EDT WED JUN 15 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR LAKE ERIE...NORTH CENTRAL OHIO...NORTHEAST OHIO AND NORTHWEST OHIO. .DAY ONE...THIS AFTERNOON AND TONIGHT. THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING. THERE IS A SLIGHT CHANCE THAT SOME STORMS COULD BECOME SEVERE WITH THE POTENTIAL TO CREATE LARGE HAIL AND DAMAGING WINDS. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. LEZ061-146>149-166>169-OHZ011>014-021>023-032-033-089-PAZ001>003- 161930- LAKE ERIE OPEN WATERS FROM RIPLEY TO BUFFALO NY- LAKE ERIE NEARSHORE WATERS FROM AVON POINT TO WILLOWICK OH- LAKE ERIE NEARSHORE WATERS FROM WILLOWICK TO GENEVA-ON-THE LAKE OH- LAKE ERIE NEARSHORE WATERS FROM GENEVA-ON-THE-LAKE TO CONNEAUT OH- LAKE ERIE NEARSHORE WATERS FROM CONNEAUT OH TO RIPLEY NY- LAKE ERIE OPEN WATERS FROM AVON POINT TO WILLOWICK OH- LAKE ERIE OPEN WATERS FROM WILLOWICK TO GENEVA-ON-THE-LAKE OH- LAKE ERIE OPEN WATERS FROM GENEVA-ON-THE-LAKE TO CONNEAUT OH- LAKE ERIE OPEN WATERS FROM CONNEAUT OH TO RIPLEY NY-CUYAHOGA-LAKE- GEAUGA-ASHTABULA INLAND-SUMMIT-PORTAGE-TRUMBULL-STARK-MAHONING- ASHTABULA LAKESHORE-NORTHERN ERIE-SOUTHERN ERIE-CRAWFORD- 322 PM EDT WED JUN 15 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR LAKE ERIE...NORTHEAST OHIO AND NORTHWEST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
744 PM EDT WED JUN 15 2016
OHZ047-160030-
KNOX-
744 PM EDT WED JUN 15 2016
...A STRONG THUNDERSTORM WILL AFFECT EASTERN KNOX COUNTY...
AT 744 PM EDT...A STRONG THUNDERSTORM WAS NEAR FREDERICKTOWN...OR
NEAR MOUNT VERNON...MOVING SOUTHEAST AT 20 MPH.
WIND GUSTS UP TO 50 MPH AND NICKEL SIZE HAIL ARE POSSIBLE WITH THIS
STORM.
LOCATIONS IMPACTED INCLUDE...
MOUNT VERNON...FREDERICKTOWN...GAMBIER...DANVILLE...MARTINSBURG...
GANN...AMITY...BLADENSBURG AND NORTH LIBERTY.
LAT...LON 4043 8262 4055 8250 4055 8239 4048 8218
4032 8219 4024 8226 4024 8230
TIME...MOT...LOC 2344Z 301DEG 18KT 4047 8245
OUDEMANThe Cleveland radar (KCLE), 123 km away, was scanning. The volume nearest the first event began at 23:59 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds downed several trees on the northern side of Mt. Vernon. Scattered power outages were also reported in the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2016Every state in 2016This day in weather historyWarnings in Ohio, June 2016
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: 645639.