What is the approximate height for a 500mb pressure surface?
The height of the 500 mb surface is 5700 meters above sea level for all points along the line. Above (or generally north) of the line the 500 mb heights are lower than 5700 meters and below (or generally south) of the line the 500 mb heights are higher than 5700 meters.
What is a 500 millibar chart?
The 500 millibar chart represents the pressure level in about the middle of the atmosphere (about half the earth’s atmospheric mass is below this level and half is above). The 500 millibar chart is one of the best charts for studying the following: vorticity advection, the trough/ridge pattern, and shortwaves.
What height is 500 hPa?
around 5.5 km above
500 hPa Geopotential Height On average this level is around 5.5 km above sea level, and it is often referred to as a steering level, because the weather systems beneath, near to the Earth’s surface, roughly move in the same direction as the winds at the 500 hPa level.
What is 500 mb wind?
Wind direction and speed at 500 mb The wind blows parallel to the height contours with lower heights to the left of the wind direction. During the winter months across the United States, this means that the 500 mb winds across generally blow from west toward east, but follow the wavy pattern of the height contours.
Why is the 500 mb level chart important for forecasting?
This is an important parameter to meteorologists because it is in the middle of the atmosphere. The 500mb height is the height at which the pressure is 500mb. When the 500mb height is low, there is low pressure at the surface, and when the 500mb height is high, there is high pressure at the surface.
What is the 528 line?
A combination of temperature, density and pressure. Many of you may have heard of the ‘528 line’ when forecasting snow. It appears on synoptic charts and heralds some wintry weather ahead.
What is 500mb height anomaly?
The 500 mb height tells you about the average air temperature in the vertical column of air between the ground surface and where the measured air pressure is 500 mb, which is 4.6 – 6.0 km (2.9 – 3.8 miles) above sea level.
How do you read a 500mb map?
If the 500 mb height is lower than the average height, then lower than average temperatures are expected. If the 500 mb height is higher than the average height, then higher than average temperatures are expected.
What is the 546 line?
If precipitation is expected on the equator side of this line then the precipitation would be liquid. In the example below, the 540 (and lower) thickness lines are colored blue and 546 (and higher) thickness lines and greater are colored red.
What is a 500 MB Maps?
The 500 millibar (mb) map plots a variety of information collected by weather balloons and represents atmospheric conditions at an altitude of approximately 5,500 meters (18,000 feet). The map displays: The air temperature (degrees Celsius) in red. The dew point temperature (degrees Celsius) in green.