041720 Forecast

Weather Headlines

*A wave of rain will overspread the mountain area Friday night into early Saturday. Rain may end as wet snow at highest elevations as conditions turn colder, with upper 20s to upper 30s along and north-northwest of the High Knob Massif and Tennessee Valley Divide by Saturday AM.

Clearing Skies With Afternoon Dry Air Advection In Wise_18 April 2020

*Clearing and cold conditions will be observed by Saturday night as another hard freeze develops in colder mountain valleys, despite increasing high cloudiness into Sunday morning.

*Rain will spread across the mountain area late Sunday into early Monday with the next wave. Heaviest amounts are now expected to remain southeast of the Cumberland Mountains.

Totals could still be significant enough to monitor for rises on mountain streams and ponding in low-lying, flood prone locations given existing wet conditions.

Precip Stats_Big Cherry Dam of High Knob Massif

Mid-Spring 2020_High Knob Massif

If counting Midnight-Midnight values, April has a good chance to become the third consecutive month with double-digit precipitation amounts at upper elevations in the High Knob Massif.

*The heaviest wave of rainfall, with possible thunderstorms, is now expected to develop late Thursday through Friday (24-25 April 2020).

European Ensemble Mean_500 MB Anomaly Forecast_23-28 April 2020

An active but generally cooler than normal pattern is looking likely through most of the remainder of April 2020.

European Model_850 MB Temp Anomaly Forecast_19-24 April 2020
Temperature Trend Above The North Pole At 30 MB

Cooler than average air across much of eastern North America occurs as the final warming over the Arctic marks transition from winter to spring.

European Model_850 MB Temp Anomaly Forecast_23-28 April 2020