Friday 9 a.m.
Much the Northeast will have a warmup to start the weekend, followed by a cold front that can set off strong thunderstorms. The weekend will end with a cooling trend that will last through Monday night. Another warmup will follow.
As autumn begins and winter approaches, Sam the Dog patiently waits for the opportunity to take advantage of all the fur he keeps growing. When I asked him when he thought it might get cold, he just looked at me.
Feelings of Fall
•Fall has a rich diversity few other seasons can match. Its winds bring fresh surprise at each turn; its days of calm mean fog that cloaks the dawn and nullifies noon.
•Fall colors scream for attention as summer's emerald draperies are splashed with auburn, set ablaze with firethorn, streaked with burnished copper, then saturated in chocolate just before Halloween.
•If spring is the chameleon season, autumn is its cousin. One day is bright and crisp, brimming with fresh vitality; the next is under a dreary roof of slate framed by curtains of steel wool.
•But, when winter's scouts retreat north for reinforcements, an eerie still is left behind. The quiet is punctuated by the quick tick of a bouncing acorn. The scene of vivid crispness is hidden by a haze that smears the colors in dirty air. The waning sun is too feeble to stir the grimy soup; fog lingers through damp mornings. Later, the haze tints muted sunbeams on bittersweet warm afternoons. You can just barely feel the hint of bygone summer, but the lengthening shadows and eager evening dusk say warm times are headed for history.
•As the sun wearies of its heated climb through summer skies, the woodlands are tossed into an autumn salad bar. The leaner diet of light and fingers of frost lace the chervil and sage greens of summer with oregano, pumpkin spice and cinnamon.
•The ocean of summer green now has islands of amber and auburn amidst currents of crimson, the mixing colors changing each day. Nature has taken its full palette of pastels, earth tones and half shades and thrown them together in a tapestry simultaneously chaotic and yet invitingly familiar. Autumn is truly our annual sunset, the rich colors and interweaving of light providing our last look at the year, with the winter night temporarily postponed but imminently inevitable.
•Autumn's loud colors are matched by its noisy winds. The brittle leaves crackle in the breeze, a sure giveaway it's autumn on those increasingly rare warm south wind nights. The leaves lodge in the lawns, shove into shrubs and burrow into the bushes; the cereal box crunchiness amplifies the sound of footsteps.
• Brash noise and sullen solitude. Bold bright colors and dim dreariness. Tossed trees with spiced scenery. How they match life's many moods and tastes. For here in one season is captured the diversity of the entire annual cycle of earthly life. Yet for all of its richness and variety, few of its scenes and sounds will last out the year.
On this map from 10 a.m. ET Thanksgiving Day, you can see the high pressure area that is causing dry and mild weather in the East and the cold front farther west.
During the late afternoon and early evening hours, the cold front of a knife will slice through the turkey and cause it to accumulate 1-2 inches on plates...
This satellite picture shows clouds over parts New York and Pennsylvania, as well as areas of low clouds, fog and snow cover from Michigan to Illinois. Most of the Northeast should have at least some sunshine through Thanksgiving Day.
As we go through the week, the flow aloft over the East will become southwesterly. This will promote a major warmup. This map shows the projected upper-air flow for Thanksgiving afternoon:
A major snowstorm will affect the area from Iowa to Michigan tonight and tomorrow. At first, snow can melt on streets, but as it continues and the temperature drops, the area impacted by slippery conditions will increase dramatically. This map shows expected accumulations:
This map shows two cold fronts in the northeast quarter of the nation; 9 a.m. ET temperature are plotted. The isobars are closest together over the central and western Great Lakes, and this is where the strongest winds were occurring.