Air conditioners got a much-needed break this past weekend as a blast of cool Canadian air settled over our region. Several high and low temperature records were tied or broken.
The following daily records were set...
When will heat return? There are signs that the rest of the summer will average cooler than normal. While brief periods of hot weather can be expected, the northwest flow pattern aloft favors frequent cold frontal passages.
The forecast map from the Climate Prediction Center (below) indicates that below normal temperatures may remain prevalent in the Ohio Valley through the rest of the summer. Below is the 30-day temperature outlook for the month of August:
The weekend's unseasonably cool air was courtesy of a seemingly permanent upper low (or trough) that has been stalled over the Great Lakes region or Northeast since late spring. For most of June and early July, the Lower Ohio Valley was in a region of fluctuating temperatures between a hot upper-level high (or ridge) over the West and the cold upper-level low over the Northeast. The upper-level low shifted west into the Mississippi Valley in mid-July, and it appears this cooler pattern for the Midwest may continue through August.