Meteorological Summer, the 3 climatologically warmest months of the year, is June, July and August. Now that September has started, let’s have a look at the Summer numbers.
Part 1: It was a cool Summer, right??? Well, sort of.
The perception of the Summer of 2014 is that it was very cool. Yes, there were some very cool stretches, but when we look at the 3 months as a whole….it was almost exactly AVERAGE! Here are the final numbers:
It was just 1/5 of a degree below average! Surprising, right? Well it’s important to note that June was a WARMER than average June….and August finished warm. That balances the numbers out,
Departure from average by month:
JUNE: +2.5 degrees
JULY: -2.5 degrees
AUGUST: -0.6 degrees
Part 2: It was really wet right?? YES!!
BUT: These numbers are just for the airport, where official records are kept. MANY locations picked up more rain than this over the last few months. Here is a map showing satellite-based rain estimates since June 1: Click on the map to enlarge and see more detail. Notice the legend on the right. The purple/blue colors=more than 20 inches. Northern Trumbull and eastern Mercer had a particularly wet Summer!
Thanks for reading!
I will do a blog reviewing the Summer season early next week, but I thought today I would do a quick preview of September. First of all, here is what we know:
1) We will continue to lose daylight at a rapid pace in September. The length of our “day” will go from just over 13 hours to under 12 hours. Here’s the sunrise and sunset time in Youngstown on the last day of September:
Here is what we THINK we know:
1) September will start quite warm and with a fair amount of humidity to boot. The forecasted upper level pattern late next week shows a ridge of high pressure over the Southeast, which will promote steamy conditions across our region:
2) The entire first half of September is likely to be warmer than average. This temperature anomaly map shows the average of the last 7 runs of the CFS (Climate Forecast System) model for September 2-12: While there can be a cool day here and there, the models are clearly pointing toward a warm couple of weeks.
Here is what we are less confident in:
1) The forecast for the entire month. Any monthly outlook is bound to be less accurate than a short term forecast. That said, The long-range models are advertising a warmer-than-average month around Youngstown: Keep in mind that with the first half of the month likely to be quite warm overall, the second half of September COULD be cooler than average but the warm start could still make the month as a whole above average.
Precipitation-wise….it’s logical to conclude that if the month is warm in the Southeast, Mid-Atlantic and Great Lakes, and increasingly cooler air masses are trying to invade from Canada….a battle zone will set up somewhere, leading to a wet month in that zone. That’s what the latest models are saying: While there is a stronger signal for a wet month in the Upper Midwest, we may have more rain than a typical September here as well.
Have a good holiday weekend! Hope to see you at the fair.