Unexpected clouds only slightly tarnished an otherwise delightful day today with low humidity and pleasant highs in the low 80s. Skies turn mostly clear as we head toward evening and plenty of sun should shine down over the weekend. Humidity begins its comeback by Sunday and the new work week likely features an extended stretch of 90+ heat.
Through Tonight: With mostly clear skies and light winds, temperatures fall nicely - through the 70s this evening to lows from near 60 (coolest suburbs) to the mid-60s (downtown).
The Weekend: Not much to worry about in the weather department thanks to high pressure holding court. Saturday is probably the more spectacular of the days with mostly sunny skies (pretty confident about sun tomorrow despite today’s surprise clouds), low humidity and highs in the mid-to-upper 80s. Sunday is partly to mostly sunny and more humid, but not yet to super-sweaty levels, with hotter highs near 90.
Pollen update: From Walter Reed: “Tree pollen is LOW at 1.28 gr/cubic meter. Our grass count is LOW (NAB range) at 3.19 gr/cubic meter which is more moderate for our local area count. Weed pollen is LOW at 3.51 gr/cubic meter with nettle family and plantain the two predominant weed species. Mold spores are in the MODERATE range at 6738.95 spores/cubic meter of air.”
Next week’s heat: The extreme heat building in the central U.S. this weekend expands eastward next week, especially mid-to-late week. Forecast highs for Saturday and Sunday are in the 95-105 range from Texas all the way north to the Upper Midwest. In the D.C. area, early-week highs look to be in the low-to-mid 90s, heating up to the mid-90s to possibly near 100 mid-to-late week. With the humidity, heat indices could reach near or past 100 - not all that uncommon for July around here, but the potential several-day duration of the heat streak adds to the seriousness.