The surprise showers in a few spots this afternoon arose from a weak warm front passing through the region. Said front has turned our winds out of a southerly direction which means increasing humidity from now into the holiday weekend. While moderately humid Friday, it should be mainly dry.
Through Tonight: The southerly flow provides a good deal of cloud cover at times. The means a warm evening compared to previous nights. Lows range from the low 60s in the cooler suburbs to the upper 60s downtown. A sprinkle or shower can’t be ruled out - especially after midnight in the northern suburbs.
Tomorrow (Friday): A very summer-like day for those getting a jump start to the last long weekend of summer. Under partly sunny skies, highs rise into the mid-80s with moderately high humidity. Winds are from the south at around 10 mph.
Pollen update from Walter Reed: Tree pollen is LOW, grass pollen is MODERATE, weed pollen and mold spores are HIGH.
Notable August records: New York City and Philadelphia (even before Irene) both had their wettest months on record. In Houston, the heat during August was analyzed to be a 1 in 10,000 year event. And Denver had its hottest August on record. Aware of any other August weather records? Post them...