This coming weekend’s weather will be notable, not for the temperatures, but for the humidity. An unsettled weather pattern is expected with considerable cloudiness and scattered showers.
Most significant will be the humidity, with dew points near the uncomfortable 70 degree level.
I’ll try to nail down the timing of the showers tomorrow evening.
Just a quick update about the weekend. Earlier this week, the models were showing significant rain for Sunday.
The trend has been to suppress the rain to the south of Philadelphia. So the weekend is looking much better than previously predicted.
I’ll update Friday evening.
A rather flat jet stream configuration and a generally warm flow will provide tranquil weather and above average temperatures for our area this coming week into the weekend. (Average highs are around 64 for this time of the year. )
A weak cold front may bring some showers on Sunday.
Generally mild conditions and tranquil weather may continue well into next week.
A weak low pressure disturbance will move along a frontal boundary just to our south late Saturday afternoon.
There are increasing signs that a last minute intensification will occur as the disturbance reaches the coastline.
If this occurs in the evening rather than during the daytime hours, the high March sun angle won’t be a factor and some snow accumulation is possible. Current NAM QPF values are about 0.33 inches water. Current thermal profiles support the precip falling mostly as snow, but light QPF in March can be difficult to accumulate, unless it occurs at night.
Each recent successive model run has shown slightly greater intensification. Not a sure thing, but it needs to be watched.
The long range models are suggesting a continued overall somewhat cold pattern with another deep cold outbreak the end of next week, followed by moderating temperatures.