Archive for January 10, 2015

ANOTHER CHILLY AIR MASS MOVES INTO THE REGION ON SATURDAY… TEMPERATURES MODERATE ON SUNDAY… MONDAY IS LIKELY TO BE A RAINY DAY AND UNSETTLED WEATHER MAY LAST THROUGH MUCH OF THE WEEK

We saw temperatures moderate somewhat on Friday after Thursday’s brutally cold weather. However, breezy conditions on Friday made it feel chilly. A fresh shot of cold air moved into Hampton Roads Saturday morning and we may not see temperatures rise much above the freezing point today in some areas, despite ample sunshine. High pressure centered this morning near Kentucky will guarantee dry weather through most of our weekend. On Sunday, temperatures should return to near, or just below seasonal norms. A low pressure system is expected to take shape over the Tennessee Valley on Sunday and that should bring increasing cloudiness later Sunday. The combination of this low and a new secondary low that is expected to develop along the North Carolina Coast should bring us rain on Monday, beginning in the morning hours. There’s a possibility that we could receive a significant amount of rain on Monday. If you are travelling to the central and western parts of Virginia on Monday, you may run into freezing rain, so please be careful. The weather pattern may remain unsettled much of next week as a trough develops over the area along with additional disturbances bringing opportunities for precipitation later in the week…. Someone asked me why on some cold mornings, there is no frost on their vehicles while on other days, their vehicles are covered in thick frost. Wind speed plays a major role in frost development. When the winds are calm (or very light) and temperatures are cold enough, frost is likely. Clear skies also contribute to frost development. Note that air temperatures don’t have to be at or below freezing for frost development. The surface temperature of your vehicle may be much lower than the air temperature. Humidity levels also play a role.  The bottom line is that even though it may be very cold in the morning, strong winds will prevent frost from developing. That’s it for now. Have a great day!

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