Our fling with spring has done a wonder to green everything up around our region about three weeks ahead of schedule, bringing a look of late April to the region in late March. Given that temperatures the past two weeks had averaged closer to the beginning of May than the 20th of March will do that to any garden, yard, or tree. Unfortunately, the calendar does win out at this time of the year and since it's still March, one can't fully discount the potential for at least some colder air to come back.
The funny part about this chill is that it doesn't appear to be all that cold in the scheme of things—highs in the lower and middle 50s is not too far removed from average for this time of the year (56). The problem is all of the buds on trees, the flowers that have bloomed in your garden, and the sensitive flowering trees that bear fruit such as the cherry and apple. Monday night's frosty setup could leave the flowering trees in a state of shock and perhaps knock the fruit out of commission for the coming year. Fingers crossed that we end up less cold than advertised, but modeling has been rather consistent and accurate in pushing this through.
The cold shot is short-lived as warmer air pushes back northeast for Wednesday, temperatures will make a run into the upper 60s across the city with mild southwest breezes. Showers cross the region Wednesday night and early Thursday as low pressure crosses the Great Lakes and Northeast. That low drags another cold front through, cooling us down a bit for the remainder of the week. We could have another frosty night Friday night although chances for frost will probably be better across the northern suburbs, especially north of the Pennsylvania Turnpike. Another system crosses through on Sunday with a chance of showers, but as of now, neither the Wednesday nor Sunday system offer much in the way of rain.
The trend going into April is for more typical weather for this time of the year, although some warning is possible as we approach Easter weekend. However, the trend doesn't support almost two full weeks of May weather around here should that warmth arrive. We should be a bit more in line with reality and end up with a much shorter warm up.