12/29/2023 0 Comments Setting up expandrive ncsu![]() That was the first Code Red day there since June 29 and 30, 2012, due to elevated ozone levels, and the first Code Red day for fine particulate matter since June 13, 2008, when smoke pushed inland from the Evans Road fire burning in eastern North Carolina.Ī fire burning closer to home also created some air quality concerns at the southern coast. Last month on June 29, the daily average PM2.5 concentration in Winston-Salem was in the Code Red, or Unhealthy, range. ![]() The June 2023 temperature summary for North Carolina. The last time that happened was in July 2012 due to persistently high ozone concentrations. Raleigh’s Millbrook monitor recorded four days all month in the Code Orange range. The cooler upper-level pattern had an unfortunate side effect of funneling in smoke from Canadian wildfires during the second week of the month, and again in its final days. Meanwhile, the culprit behind our normally sticky summer weather – the Bermuda high pressure system, which tends to usher in hot and humid air from the south – was well offshore for most of last month. Our June weather was largely shaped by the same factors as in May, with upper-level troughing over the eastern United States that kept us cooler amid prevailing northerly or northwesterly winds. Our unseasonably cool start to summer continued last month, as the National Centers for Environmental Information (NCEI) reports a statewide average temperature of 71.1☏ and our 13th-coolest June out of the past 129 years. We also look at the numbers after the first half of 2023, and preview the main storylines for the end of the year.
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