What does SPECI mean on METAR?
A SPECI is a special report of meteorological conditions, issued when one or more elements meet specified criteria significant to aviation. SPECI is also used to identify reports of observations recorded ten minutes following an improvement (in visibility, weather or cloud) to above SPECI conditions. Location.
What causes SPECI METAR?
A SPECI is issued when there has been a significant change from the METAR occurs. Significant changes include changes to wind direction, visibility, weather phenomena, ceiling, an aircraft mishap has occurred or there is safety critical meteorological situation.
How can you tell if a METAR and SPECI report is a corrected report?
6 . How can you tell if a METAR or SPECI report is a corrected report? This information is provided in plain language in the remarks section of the report. The report begins with CORRECTED followed with METAR or SPECI depending on the report.
What does SPECI stand for?
SPECI Meaning
| 3 | SPECI | Aviation Selected Special Weather Report Aviation, Technology, Aircraft |
|---|---|---|
| 1 | SPECI | Aviation Special Weather Technology, Aircraft, Aviation |
| 1 | SPECI | special meteorological report Technology, Aircraft, Aviation |
| 1 | SPECI | Special weather report Technology, Aviation |
How often are SPECI issued?
Special Reports (SPECI) are Aerodrome Weather Reports issued whenever weather conditions fluctuate about or are below specified criteria. These criteria are published in the Aeronautical Services Handbook: Chapter 6, Table 6.1 and 6.2.
What are the criteria for a SPECI?
Wind direction changes by 45 degrees or more in less than 15 minutes and the wind speed is 10 knots or more throughout the wind shift. (2)VISIBILITY. Surface visibility as reported in the body of the report decreases to less than, or if below, increases to equal or exceed: (a) 3 miles.
How do you decode Metars and TAFs?
The first three digits are the true direction to the nearest 10 degrees from which the wind is blowing. The next two digits are the sustained speed. If gusts are present, the next two or three digits following the “G” are the “gust,” the maximum wind speed in the last ten minutes.
At what times may a SPECI METAR be issued?
METAR is a surface weather observation issued on the hour, while SPECI is a special observation, issued at times other than on the hour, as the result of a significant weather change.
What does wind 090 mean?
It is coded as tens of degrees relative to true north. Directions less than 100 degrees are preceded with a 0. For example, a wind direction of 90 degrees is coded as 090. A wind from the north is coded as 360.
How long is a SPECI valid for?
A SPECI has no validity period because it is a report. It “expires” as soon as it is issued since it is simply a statement of the conditions at the time the report was made. TTFs are “mini-forecasts”, highly accurate and valid only for 3 hours from the time of the report to which they are attached.
How do you read a weather code?
The first two digits are the date, the 16th of the month, and the last four digits are the time of the METAR, which is always given in coordinated universal time (UTC), otherwise known as Zulu time. A “Z” is appended to the end of the time to denote that the time is given in Zulu time (UTC) as opposed to local time.
How do you read a weather report?
SUMMARY BOX
- Precis. “Windy. Mostly sunny.” Less than 5 words, to describe the main parts of the expected weather.
- Chance of Rain. This is the likelihood of any rain in that location, from midnight to midnight.
- Rainfall Amount. If it does rain, the likely amount. The range is also a ‘percentage’ chance.
What does 9900 mean on winds aloft?
Wind direction is indicated in tens of degrees (two digits) with reference to true north and wind speed is given in knots (two digits). a. Light and variable wind or wind speeds of less than 5 knots are expressed by 9900.
What are the symbols of weather?
Weather Forecasting Symbols
- Sunny Conditions. The most well-known of all the weather symbols.
- Partly Cloudy (Day) The day will be mostly sunny with patches of cloud cover during the day.
- Partly Cloudy (Night)
- Cloudy.
- Overcast.
- Cloudy With Light Showers.
- Cloudy With Showers.
- Cloudy With Heavy Showers.