It’s been a decent day out there, though perhaps one of those days that look better from the inside thanks to elevated humidity levels. Highs in the mid-and-upper 80s aren’t too far from normal here in late August, and after the weekend storminess, it’s nice to see lots of sun again. We should stay dry through the remaining daylight hours, but a cold front on its way brings a chance of rain early Tuesday morning.
Through Tonight: Clouds associated with an approaching cold front may not make themselves too known until late night, with just a few here and there early. After midnight, mostly cloudy skies should be the rule. A line of showers or t’showers could (30%-40% chance) move into the region before sunrise, sweeping east with the front into the early morning. With at least partly cloudy skies, and still high humidity, lows only reach the upper 60s to low 70s.
Tuesday: The cold front should push through the area early enough to salvage a pretty decent day. After a threat of near-sunrise (maybe into rush hour) showers or t’showers, a nicer air mass filters in behind the front. With plenty of afternoon sun, and a bit of a downsloping (compressed/warmed off the mountains) wind, we probably won’t notice cooler air just yet, but it should be drier. Highs range from the mid-80s to near 90. Some cold air aloft might spark a shower late in the day, but with less and less surface moisture to work with, it seems a small risk.
Pollen: Recent rains have helped clear pollen temporarily. Tree, grass and weed counts are all low. Mold spores remain high. If you’re a ragweed sufferer, Susan Kosisky from the U.S. Army Centralized Allergen Extract Lab notes that typical peak is early September.
Florida rain: Torrential rain bands from tropical storm Isaac spiraling over the Florida peninsula have produced rainfall totals today up to 7”. The most widespread heavy totals exceeding 2.5” concentrated in Broward and Palm Beach Counties according to data from the National Weather Service and WeatherBug. But the big winner was Okeechobee County Airport which received 7” today, making its two-day storm total 13.68”.
Isaac at 5 p.m.: Maximum winds have strengthened to 70 mph and pressure is down to 981 mb. Very close to hurricane status. Link: Image of latest landfall simulations from four models.