Mountain air cooled at night sinks down valleys and flowsout to sea (katabatic wind). These effects do not show up in the isobars on the weather map but can halve or double the local wind speed, and distort its direction (always towards low pressure). One terrain effect does show up ...
Wind directionand speed (in knots) If a weather map has already been analyzed, you'll find little use for the station plot data. But if you'll be analyzing a weather map by hand, station plot data is often the only information you start off with. Having all stations plotted on a map...
Japanese automaker Toyota has announced its “WovenCity” plan, which aims to create a “smart city of the future". It will be a “living laboratory” for technologies including self-driving systems, high-speed internet connectivity to link major information and communication systems. ...
Here’s how to sow seeds and what that means exactly. Get your garden started with this handy guide.
Screenshot of the classic weather map from the Icelandic MET Office. Use the sliding bar below the map to move back and forth in time, and click on the map to zoom in. Doing so will also give you more locations to look at. By hovering over a sun/cloud symbol, you’ll get b...
Surfers who want to practice aerial manoeuvrers would most likely prefer catching an onshore wind. Wind strength/speed The lower the number, the more likely a wave will be good. At speeds below five kilometres per hour (3mph), the ocean will be great regardless of whether you're going in...
“G”) up to 17 knots. If the wind is inconsistent a VRB in place of the direction will indicate that it is “variable.” If there is little to no wind a “00000” will appear. The wind speed, by the way, is the mean wind speed in knots over the 10 minute period preceding the...
The best of National Geographic delivered to your inbox Sign up for more inspiring photos, stories, and special offers from National Geographic.Sign Up Legal Terms of Use Privacy Policy Interest-Based Ads Our Sites Nat Geo Home Attend a Live Event Book a Trip Buy Maps Inspire Your Kids Shop...
Wind: Indicates the wind speed and direction. Rainfall: Shows the level of precipitation in the last 24 hours and the next expected rainfall. Feels Like: Indicates how the current temperature actually feels like depending on factors like humidity and wind. ...
As Earth crosses the boundary where the normal solar wind flow gives way to one of these high-speed streams, we can encounter a buildup of high-energy particles. This typically results in stronger auroras as more of those particles are captured by Earth’s...