After a severe wind event rocked the Mid-Atlantic region late yesterday, the weather will calm down today as high pressure edges this way. Winds will increase today as partial sunshine develops and the humidity levels will drop to much more comfortable levels. High pressure is to stay in control of the weather at mid-week and then another disturbance arrives later in the day on Thursday with a renewed threat of showers.
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The severe weather threat is increasing across Maryland, Virginia and the Washington, D.C. metro region where skies have cleared allowing for temperatures to climb well up into the 80’s. Clouds should thin out across southern PA during the next couple of hours. This daytime heating is helping to destabilize the atmosphere setting the stage for what appears to be a widespread severe wind event later today into early tonight across Maryland, Virginia and Washington, D.C. and it is likely to extend up across much of southern PA including the Philly metro area. In addition to the low-level heating, ingredients include ample available moisture and powerful jet streaks at multiple levels of the atmosphere (e.g., 250 millibars, 850 millibars). The potential exists for wind gusts to reach into the 60-75 mph range with power outages on the table. Tornadoes are also in the picture during this weather event…expect a tornado watch to be issued shortly for many areas. The likely timetable for the severe weather in the DC-to-Philly corridor is 4-8pm.
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A very active beginning to the week as a potent system crosses the Ohio Valley and enhances upward motion in the Mid-Atlantic region. The result will be occasional showers and embedded thunderstorms…some of the rain can be heavy at times and some of the storms can reach severe levels with damaging wind gusts a threat…maybe even an isolated tornado. High pressure will return for the mid-week period before somewhat unsettled weather heads this way later in the week.
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A cool front will approach the area later today from our northwest and it is likely to generate scattered showers and thunderstorms; primarily, during the late afternoon and evening hours. Some of the rain can be heavy and some of the storms can be strong. The weekend is likely to turn out to be rain-free following the late night/early morning passage of the cool frontal system. The early part of next week looks very unsettled as a potent system heads this way from the Midwest. This can spark some heavy shower and strong-to-severe thunderstorm activity in the Mid-Atlantic region from later Monday into Monday night.
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The weather has been rather tranquil during the past few days in the Mid-Atlantic region and Northeast US following a very active extended stretch that included numerous heavy rain and strong thunderstorm events. The calm may be just about to wind down for the northeastern quadrant of the nation. A cold front will push through the Northeast US on Friday and it is likely to increase the chances of showers and thunderstorms. Some of the rain later Friday can be heavy at times and some of the storms can reach strong-to-severe levels. An even more impressive system will cross the Great Lakes from late Sunday into late Monday and it could produce another batch of heavy showers and severe thunderstorms in the Mid-Atlantic/Northeast US.
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High pressure will move offshore today and a couple of frontal systems will affect us over the next couple of days. A warm front will push through from the south later today and then a cold front approaches from the west later tomorrow. As a result, the overall humidity and the chance for showers and thunderstorms will increase by tonight and there can be some rain on Friday as well. Looking ahead, the potential exists for a dry weekend in the Mid-Atlantic region with warm conditions and lowering humidity following the passage of the cold front. The weather likely turns unsettled once again early next week as a potent system heads this way on Monday.
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High pressure that had its origins up in Canada will continue to influence the weather around here providing us with another pleasant day featuring comfortable temperatures and low humidity. This high will move offshore on Thursday and a couple of disturbances will head this way from the middle of the country. As a result, the humidity and chance for showers and thunderstorms will increase later tomorrow and it looks like the threat for rain will continue on Friday as well. Looking ahead, the potential exists for a dry weekend in the Mid-Atlantic region with comfortable temperatures as another high pressure system expands into the region. The weather likely turns unsettled once again early next week.
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It looks like the month of August will feature multiple cooler-than-normal air masses dropping into the US from Canada which continues a trend that has encompassed much of the summer season so far and impacted large areas of the country. The one areal exception to this pattern has been the Southwest US where intense upper-level ridging has resulted in persistent excessive heat during the past several weeks. These intrusions of cooler-than-normal air this summer has balanced out the excessive heat in the Southwest US leaving the nation with nearly normal temperatures as we begin the month of August.
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A reinforcing comfortable air mass will push into the northeastern states today with its origins in southeastern Canada. This influx of air with below-normal temperatures will limit any chances of reaching the 90 degree mark around here during the remainder of the week. In terms of rainfall, chances will be very limited through tomorrow, but then should ramp up by later Thursday and Friday with a couple of disturbances coming our way.
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A much more comfortable air mass pushed into the Mid-Atlantic region on Sunday following the passage of an active and strong cool frontal system on Saturday night. This pleasant air mass will be reinforced by a second comfortable air mass on Tuesday limiting any chances of reaching the 90 degree mark this entire week. In terms of rain, chances will be quite limited around here through mid-week, but should ramp up again by laterThursday and again on Friday with a couple of disturbances coming our way.
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