What does slp mean on a metar

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Featured on Meta. Now live: A fully responsive profile. Related Hot Network Questions. Question feed. Aviation Stack Exchange works best with JavaScript enabled. Rain showers. What is the difference between a Metar and TAF?

We issue it to trainee police observers and they pick things up pretty quickly. The simple answer to your question is: TAF is a forecast for a set number of hours ahead and a Metar is actual weather at the time of issue.

You can check all of them before and during flight using methods shown in the GetMet booklet. Well-Known Member. What is the definition of Cavok? CAVOK is an abbreviation for Ceiling And Visibility OK, indicating no cloud below 5, ft 1, m or the highest minimum sector altitude and no cumulonimbus or towering cumulus at any level, a visibility of 10 km 6 mi or more and no significant weather change.

I pulled this chart from Wikipedia. Fly some other time. The numbers can be confusing so here is a trick: always add TWO zeros to the number.

Here is a chart from the Aviation Weather Services AC g page 51 which explains sky cover contractions. The number reported with it is the base of the cloud and not its height.

You also need to be careful at airports with surface Class E like this one in Oregon with no tower. With ceilings less than feet, you have to talk to Center and get Special VFR permission to land at this airport.

These numbers are always reported in degrees Celsius. The first number is the current temp and the second number is the dew point. With light winds and a low temperature spread you may see fog. I have been fooled before by these numbers before. As the sun rises the temperature changes, a clear day can turn into a nightmare. The TAF should anticipate fog, but not always.

They are usually published at 55 past the hour. You need to do some advanced decision making and think about what the temperature will do from the time you get the weather to when you take off. The final section of the easy part is the altimeter setting. If your altimeter is more than 75 feet different than the official airport elevation, get it serviced. Also, if you happen to have two altimeters in your aircraft make sure they read within feet of each other.

Half of the remarks section was never intended for pilots. The beginning section of the Remarks section has some pretty awesome information if you know how to read it. There are 36 different types of reports you will see in the remarks section and they are listed in the table below. Volcanic Eruptions: This remark is self-explanatory. It will have the name of the volcano and the location of the ash cloud.

The A01 indicates the station has no way to differentiate between types of precipitation. The number after the slash is the time after the hour. So in this example, the wind shift occurred at 30 past the hour. This remark is useful because this will tell you if Tower can see you. Variable Visibility: This is important to let you know conditions are changing. Sector Visibility: This can be useful if only a certain part of the airport has bad visibility.

Some airports are able to report visibility in several areas on the airfield. You will only see this remark if the second location has worse visibility than the main reporting station.

You will see this reported as contractions from the acronyms below when at a manual station. Are you confused yet? Then it started snowing at 20 after and it ended at 55 after. Beginning and end of Thunderstorms: You should be able to get this one after figuring out the one above.

Here is an example: TSBE30 which means the thunderstorms began at and ended at Once you know how they work, it is much easier to read them. Translated it means thunderstorms are moving from the Southeast of the reporting station to the Northeast.

The SLP is the sea level pressure, showing the tens, units, and tenths of hectopascals hPa, aka millibars. It helps to know that the standard sea level pressure is In our case, we end up translating SLP to Now, the sharp reader will notice that the altimeter setting of While both values are meant to be pressure one might expect at sea level, they are calculated in different ways and for different purposes. In other words, it works the way we would at an airport without any weather reporting — figure out what altimeter setting gives you the right altitude.

This adjustment shall be based on the station elevation and the hour mean temperature at the station. My question is, why is it shown? Are there some aircraft systems that use that information? You dial in the barometric pressure on the altimeter in inches.