Weather or Not
Last updated 10/3/2019 at 10:56am
It was back on June 21, the Summer Solstice, when the max daily high temp last fell below 100º F. And for the next 81 straight days, we experienced temps at or above 100º F, peaking on Aug. 5 at 118º F.
Then on Sept. 10, we hit the two-digit midget mark once again. On that morning at 6 a.m., the daily temp was at its low point of 68.4º F, the lowest daily minimum temp recorded since July 10, according to Park HQ official weather data. If it didn't exactly feel like winter, it was at least one lonely sign of hope for a cooling trend.
Perhaps as the brightest signal to forthcoming September heat relief, the late-night/early morning hours on the Sunday of Labor Day weekend brought thunderstorms and a spectacular lightning show over the surrounding mountains.
"The heat-lightning over Toro (Peak) was almost like a strobe light," said Steven Forrest in a Facebook post. "I'd never seen anything like it. We wondered if anyone else in Borrego was awake."
The humidity at the time of the lightning show was about 20%, but it rose 55 points in only four hours to max out at a whopping 75% at 6 a.m., nearly matching similar max humidity readings on Aug. 24 – 25 and July 23 – 24.
Starting on Friday Sept. 6, it was just another beautiful weekend in Borrego – perfect morning conditions for golf – where cloudless skies and low humidity made the 100+ afternoon temps tolerable. These conditions were followed by generally declining daily high temps and humidity through Sept. 10 that lasted all of two more days before the temps surpassed 100º F again; however, relative humidity remained low during this same period.
As for the rest of September, we can look to the AccuWeather forecast for temps at around 100º F through the weekend following publication of this issue, and then look back to last September to see that we had only four days where max daily high temps fell below the 100º F mark. If past is prologue, we'll be in for hot weather –hopefully not stifling hot and miserable weather – through the end of the month.
As with forecasts for mid- to late-September, the only way to forecast weather in October is to look at previous Park HQ data, hoping that neither short-term but anomalous weather patterns or even long-term effects of climate change don't alter the schedule. So here's the 6-year history of the most recent October temperature and rainfall in Borrego according to Park HQ data:
Two out of the six previous Octobers had max daily temps exceeding 100º F in 2015 and '17, while four days in the previous six Octobers (in 2013, '15, '16, and '18) showed days of rainfall each below 0.2 inches, respectively, with no rain measured in October of 2014 or '17. Not exactly a data trend to hang one's hat on, weather-wise.
So we'll just have to wait, stick our heads out the door and see what gives, along with an update in the Oct. 3 issue of the Borrego Sun on the weather forecast for the Borrego Days Parade on Saturday Oct. 19.