Cool air dominates the Northeast while a heat wave is unfolding in the central Plains. As we go through the week, an upper-air trough from just off the West Coast will move to the Rockies and then the Plains. A ridge now over the upper Mississippi Valley will reach the East Coast Friday night. The position of the upper-air ridge axis will be important later this week because it will determine how far the very warm air will progress. In a true warm sector, where the air is uniformly warm, the flow at ground level is parallel to the flow aloft. That will be the case west of the ridge axis (or crest). Downstream from there the surface flow may be from the southwest but the flow aloft is from the northwest. When the wind changes in that way with elevation, it is called a veering wind. In such cases, it is becoming warmer but may not yet be anywhere near as warm as in the warm sector I mentioned earlier. It is in the contested zone where we look for clouds, showers and thunderstorms. This video forecast extends through next weekend.
The sun must be low in the sky for rainbows to appear. When showers move east of your location and the sun comes out, a rainbow often appears. Here's a partial rainbow I saw Saturday evening.
The part of the front over the Eastern states will move south this afternoon and tonight, then a low pressure area will move along it. The result should be snow from the Ohio Valley into the Middle Atlantic states.
The thin blue line is temperature. Notice how it is left of the black line near the bottom, meaning the ground level temperature is below freezing. Several thousand feet overhead, however, it is warmer than 32 degrees, so any snow falling through that layer melts.
Today is the National Education Association's Read Aloud Day. If you have young children or grandchildren, I hope you get the chance to read to them today, and on many other days. On today's video, I tried reading to you.
Clearing should follow tomorrow, but another storm will cause snow and ice followed by rain from Maryland to Massachusetts late Tuesday into early Wednesday.
The storm moving from the Ohio Valley to the Middle Atlantic coast will cause snow and ice, Clearing should follow tomorrow, but another storm should bring snow and ice followed by rain from Maryland to Massachusetts.
The wind will not roar like a lion in the Northeast on Sunday March 1. It certainly won't be lamblike. However, with more cold and snow in the forecast, it might be suitable for this group: