Significant Heat on Sunday Afternoon

Heat and humidity will gradually build over the weekend and peak on Sunday. The warmest temperatures and highest heat index values will occur on Sunday between Noon and 6 PM across the Champlain Valley of 95-98 F. Stay hydrated, take breaks in air-conditioned rooms if possible, seek shade often, and check up on relatives and neighbors. Read More >

Surface to 1km Lapse Rate

A lapse rate is the rate of temperature change with height. The faster the temperature decreases with height, the "steeper" the lapse rate and the more unstable the atmosphere becomes. Values less than 5.5-6.0 degrees C/km represent stable conditions, while values near 9.5 degrees C/km are considered unstable. Between these values, lapse rates are considered conditionally unstable, meaning that it may become unstable if enough moisture is present. For more information on lapse rates, please click here.

Radar