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C101 weather
- 1. WEATHER IDENTIFICATION FAVA C101 / Israel Reyes
- 2. METAR KDFW 181604Z AUTO 25006G15 10SM RA FEW015 SCT040 BKN080 OVC150 25/22 A2992 RMK AO2 SLP119 P0000 T02670233 Can you tell me what it means? Lets take a closer look KDFW 181604Z AUTO 25006G15 10SM RA FEW015 SCT040 BKN080 OVC150 25/22 A2992 RMK A02 SLP119 P0000 T02670233
- 3. METAR BREAK IT DOWN KDFW Station Identifier - Each station is identified by a four letter code as established by the International Civil Aviation Organization (ICAO). In the 48 contiguous states, a unique three letter identifier is preceded by the letter "K". For example, Dallas/Fort Worth International Airport, is identified by the letters KDFW, K being the country designation and DFW being the airport identifier. 181604Z Date and Time of Report - The date and time (181604Z) are depicted in a six digit group. The first two digits of the six digit group are the date. The last four digits are the time of the METAR, which is always given in Coordinated Universal Time (UTC). A "Z" is appended to the end of the time to denote the time is given in Zulu time (UTC) as opposed to local time.
- 4. METAR BREAK IT DOWN AUTO Modifier - Modifiers denote that the METAR came from an automated source or that the report was corrected. If the notation "AUTO" is listed in the METAR, the report came from an automated source. It also lists "AO1" or "AO2" in the remarks section to indicate the type of precipitation sensors employed at the automated station. When the modifier "COR" is used it identifies a corrected report sent out to replace an earlier report that contained an error. 25006G15 Winds - Winds are reported with five digits (14021) unless the speed is greater than 99 knots, in which case the wind is reported with six digits. The first three digits indicate the direction the wind is blowing, rounded to tens of degrees from true north (not magnetic north). If the wind is variable, it is reported as "VRB". The last two digits indicate the speed of the wind in knots (KT) unless the wind is greater than 99 knots, in which case it is indicated by three digits. If the winds are gusting, the letter "G follows the wind speed (G26). After the letter "G the peak gust recorded is provided. If the wind varies more than 60 degrees and the wind speed is greater than 6 knots, a separate group of numbers, separated by a "V" will indicate the extremes of the wind directions.
- 5. METAR BREAK IT DOWN 10SM Visibility - The prevailing visibility (3/4 SM) is reported in statute miles as denoted by the letters "SM". It is reported in both miles and fractions of miles. At times, RVR, or runway visual range is reported following the prevailing visibility. RVR is the distance a pilot can see down the runway in a moving aircraft. When RVR is reported, it is shown with an R, then the runway number followed by a slant, then the visual range in feet. For example, when the RVR is reported as R17L/1400FT, it translates to a visual range of 1,400 feet on runway 17 left. RA Weather - Weather can be broken down into two different categories: qualifiers and weather phenomenon (RA). First, the qualifiers of intensity, proximity, and the descriptor of the weather will be given. The intensity may be light (-), moderate ( ), or heavy (+). Proximity only depicts weather phenomena that are in the airport vicinity. The notation "VC" indicates a specific weather phenomenon is in the vicinity of 5 to 10 miles from the airport. Descriptors are used to describe certain types of precipitation and obscurations. Weather phenomena may be reported as being precipitation, obscurations, and other phenomena such as squalls or funnel clouds.
- 6. METAR BREAK IT DOWN FEW015 SCT040 BKN080 OVC150 Sky Condition - Sky condition (FEW015 SCT040 BKN080 OVC150) is always reported in the sequence of amount, height, and type or indefinite ceiling/height (vertical visibility). The heights of the cloud bases are reported with a three digit number in hundreds of feet above the ground. Clouds above 12,000 feet are not detected or reported by an automated station. The types of clouds, specifically towering cumulus (TCU) or cumulonimbus (CB) clouds, are reported with their height. Contractions are used to describe the amount of cloud coverage and obscuring phenomena. The amount of sky coverage is reported in eighths of the sky from horizon to horizon. 25/22 Temperature and Dewpoint - The air temperature and dewpoint are always given in degrees Celsius (25/22). Temperatures below 0C are preceded by the letter "M" to indicate minus.
- 7. METAR BREAK IT DOWN A2992 Altimeter Setting - The altimeter setting is reported as inches of mercury in a four digit number group (A2992). It is always preceded by the letter "A". Rising or falling pressure may also be denoted in the remarks sections as "PRESRR" (pressure rising rapidly) or "PRESFR" (pressure falling rapidly) respectively. RMK Remarks - Comments may or may not appear in this section of the METAR. The information contained in this section may include wind data, variable visibility, beginning and ending times of particular phenomenon, pressure information, and various other information deemed necessary. An example of a remark regarding weather phenomenon that does not fit in any other category would be: OCNL LTGICCG. This translates as occasional lightning in the clouds, and from cloud to ground. Automated stations also use the remarks section to indicate the equipment needs maintenance. The remarks section always begins with the letters "RMK".
- 8. METAR METARs are the most common way to retrieve weather information on the VATSIM network. Before raring down the runway on that H777 be sure to know the weather conditions at your airport. This will determine your departure runway and the type of acceptable flight plans for those whom wish to fly VFR. We will go more in to detail during the VFR operations course.
- 9. END