At 5 p.m., radar indicates widely scattered showers and thunderstorms impacting parts of southern and western Virginia, but the immediate bay region looks dry. We have enjoyed a mostly sunny, warm, and humid day on the bay, but typical for this time of year. Current readings are in the mid to upper 80s with a light southerly breeze. As we move through the evening hours, look out for isolated showers and thunderstorms, but most areas will remain dry overnight. On Thursday, our weather will be more unsettled with clouds and sun giving way to a line of showers and thunderstorms likely to develop during the afternoon hours as a cold front moves in from the west. Temperatures may touch 90 degrees before the showers move through the area, and then fall back into the low 70s by early Friday morning. On Friday, the wind will shift to the north as drier air overspreads the bay region. Under a mostly sunny sky, highs will reach the low to mid 80s. Under high pressure, and with light winds, thermometer readings will drop into the low 60s by Saturday morning. Right now, Saturday looks pleasant with bright sunshine and highs in the low 80s.
On the Maryland portion of Chesapeake Bay, there are no advisories currently in effect. A southwest wind of 10 knots or less will continue through the evening with wave heights of one foot or less. Boaters should be aware of isolated showers or thunderstorms that may result in fast-changing weather conditions and some gusty winds. Marine weather information is provided only as a guide. Boaters should always stay tuned to the latest forecasts and advisories from the National Weather Service.
The average high temperature for August 21 is 85 degrees and the average low is 65. The records at Baltimore on this date are 97 degrees in 1899 and 51 degrees in 2000. Weather data courtesy of the National Weather Service. For more weather updates, please visit my Chesapeake Bay Weather page on Facebook, and if you're heading to Ocean City feel free to check out my Ocean City MD Weather page on Facebook. You can also follow me on Twitter @chesbayweather.