4/20 – Rob Martin’s “Past Hump Day” Updated Wednesday Evening Forecast
Aside from a stray shower tonight, it’s looking quite nice. A strong southeast breeze subsides a bit tonight, but picks back up tomorrow. This has prompted a coastal flood advisory for our beach counties. Tides will run 1-2 feet above normal, resulting in some nuisance flooding. The onshore flow also brings an end to our chilly nights with lows in the mid 60s, a good 15 degrees above those of the last two nights. It’ll also warm us up closer to 80 degrees Thursday.
Not much more warming for Friday, but it stays above average. From a rain chance perspective, we’re not carrying any through Saturday at least. Building high pressure will stunt precipitation during the period.
Showers may develop just northwest of the area tonight as a weak disturbance tracks across the upper Mississippi Valley. Will concede that it’s possible that a stray shower or 2 could develop over northwestern portions of the area, but the probability appears to be too low to justify having precip chances in the forecast.
High pressure at the surface and aloft will still keep much of the early part of extended period dry at this time. Rain chances look to hold off for the start of the weekend but could increase a bit during the day on Sunday. The greater chance for rain will be on Monday, late in the period, as a cold front approaches and pushes through late in the day. Temperatures will slowly warm in the extended to just above normal values as the high pressure shifts east.