Ohio: Oct. Usually Brings 1st Fall Freeze

The calendar has turned to October, and with it, harvest and fall actions will speed up over the subsequent few weeks. We now have already skilled just a few chilly nights this previous week with patchy frost in some areas, however when can we sometimes see our first freeze situations? This primary (final) official freeze is outlined as the primary fall (spring) day the place the in a single day low reaches 32°F.

The Midwest Regional Local weather Middle (MRCC) has developed a brand new Freeze Date Software (right here) that depends on historic temperature knowledge on the county degree again to 1950 and permits customers to pick a freeze temperature threshold between 20°F and 40°F to visualise the earliest, common, and newest fall or spring occasion. As an example, many people have an interest within the arduous freeze threshold of 28°F, the temperature at which our corn and soybean rising season involves an finish.

Determine 1 reveals the typical first fall freeze date for areas of the japanese corn belt for the interval 1950-2021 utilizing the 32°F threshold. The net model permits customers to hover their mouse over a county of option to view the typical freeze date for that county. As an example, the Knox County common is October 8, October 11 in Darke and Fulton Counties, and October 17 in Fayette County. Areas close to larger cities like Cleveland and Cincinnati have first freeze dates nearer to the tip of the month.

Determine 1: Common first fall freeze (32°F) for the interval 1950-2021. Determine courtesy of the Midwest Regional Local weather Middle. Click on Picture to Enlarge

Temperatures are anticipated to flirt with 32°F on Tuesday morning and once more Saturday and Sunday mornings. Nonetheless, a lot of the earliest dates and even the earliest 10% of dates on report occurred in late September, so we’re past these thresholds.

Newer first freeze dates have been occurring later within the 12 months, with some counties reporting a development of greater than 3 days later per decade (~21 days later over the complete interval). The Freeze Software additionally permits customers to view these developments in addition to extra detailed evaluation for particular person counties.

Different MRCC local weather associated instruments can be found with cli-MATE. As an example, Determine 2 reveals the likelihood of an earlier freeze within the fall for the Wauseon Water Plant in Fulton County utilizing knowledge during the last 30 years. Observe that fifty% of the time, a tough freeze (28°F) happens by October 30 (inexperienced line) for this website. These graphs will be generated for stations throughout the state.

Determine 2: Chances of an earlier freeze within the fall for 5 temperature thresholds for the Wauseon Water Plant in Fulton, County Ohio. Determine courtesy of the Midwestern Regional Local weather Middle. Click on Picture to Enlarge

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