FIG GEN 3.5.24
Key to Aerodrome Forecast (TAF) and Aviation
Routine Weather Report (METAR) (Front)
TAF KPIT 091730Z 0918/1024 15005KT 5SM HZ FEW020 WS010/31022KT FM091930 30015G25KT 3SM SHRA OVC015 TEMPO 0920/0922 1/2SM +TSRA OVC008CB FM100100 27008KT 5SM SHRA BKN020 OVC040 PROB30 1004/1007 1SM -RA BR FM101015 18005KT 6SM -SHRA OVC020 BECMG 1013/1015 P6SM NSW SKC
NOTE: Users are cautioned to confirm DATE and TIME of the TAF. For example FM100000 is 0000Z on the 10th. Do not confuse with 1000Z!
METAR KPIT 091955Z COR 22015G25KT 3/4SM R28L/2600FT TSRA OVC010CB 18/16 A2992 RMK SLP045 T01820159
Forecast Explanation Report
TAF Message type: TAF-routine or TAF AMD-amended forecast, METAR-hourly, SPECI-special or TESTM-non-commissioned ASOS report METAR
KPIT ICAO location indicator KPIT
091730Z Issuance time: ALL times in UTC “Z”, 2-digit date, 4-digit time 091955Z
0918/1024 Valid period, either 24 hours or 30 hours. The first two digits of EACH four digit number indicate the date of the valid period, the final two di-gits indicate the time (valid from 18Z on the 9th to 24Z on the 10th).
In U.S. METAR: CORrected ob; or AUTOmated ob for automated re-port with no human intervention; omitted when observer logs on. COR
15005KT Wind: 3 digit true-north direction , nearest 10 degrees (or VaRiaBle); next 2-3 digits for speed and unit, KT (KMH or MPS); as needed, Gust and maximum speed; 00000KT for calm; for METAR, if direction varies 60 degrees or more, Variability appended, e.g., 180V260 22015G25KT
5SM Prevailing visibility; in U.S., Statute Miles & fractions; above 6 miles in TAF Plus6SM. (Or, 4-digit minimum visibility in meters and as re-quired, lowest value with direction) .SM
Runway Visual Range: R; 2-digit runway designator Left, Center, or Right as needed; “/”, Minus or Plus in U.S., 4-digit value, FeeT in U.S., (usually meters elsewhere); 4-digit value Variability 4-digit value (and tendency Down, Up or No change) R28L/2600FT
HZ Significant present, forecast and recent weather: see table (on back) TSRA
FEW020 Cloud amount, height and type: Sky Clear 0/8, FEW >0/8-2/8, ScaTtered 3/8-4/8, BroKeN 5/8-7/8, OverCast 8/8; 3-digit height in hundreds of ft; Towering Cumulus or CumulonimBus in METAR; in TAF, only CB. Vertical Visibility for obscured sky and height “VV004”. More than 1 layer may be reported or forecast. In automated METAR reports only, CleaR for “clear below 12,000 feet” OVC 010CB
Temperature: degrees Celsius; first 2 digits, temperature “/” last 2 digits, dew-point temperature; Minus for below zero, e.g., M06 18/16
Altimeter setting: indicator and 4 digits; in U.S., A-inches and hun-dredths; (Q-hectoPascals, e.g., Q1013) A2992
WS010/31022KT In U.S. TAF, non-convective low-level (≤2,000 ft) Wind Shear; 3-digit height (hundreds of ft); “/”; 3-digit wind direction and 2-3 digit wind speed above the indicated height, and unit, KT
FIG GEN 3.5.25
Key to Aerodrome Forecast (TAF) and Aviation
Routine Weather Report (METAR) (Back)
In METAR, ReMarK indicator & remarks. For example: Sea- Level Pressure in hectoPascals & tenths, as shown: 1004.5 hPa; Temp/ dew-point in tenths °C, as shown: temp. 18.2°C, dew-point 15.9°C RMK SLP045 T01820159
FM091930 FroM: changes are expected at: 2-digit date, 2-digit hour, and 2-digit minute beginning time: indicates significant change. Each FM starts on a new line, indented 5 spaces
TEMPO 0920/0922 TEMPOrary: changes expected for <1 hour and in total, < half of the period between the 2-digit date and 2-digit hour beginning, and 2-digit date and 2-digit hour ending time
PROB30 1004/1007 PROBability and 2-digit percent (30 or 40): probable condition in the period between the 2-digit date & 2-digit hour beginning time, and the 2-digit date and 2-digit hour ending time
BECMG 1013/1015 BECoMinG: change expected in the period between the 2-digit date and 2-digit hour beginning time, and the 2-digit date and 2-digit hour ending time
Table of Significant Present, Forecast and Recent Weather - Grouped in categories and used in the order listed below; or as needed in TAF, No Significant Weather.
Qualifiers Intensity or Proximity
“-” = Light No sign = Moderate “+” = Heavy
“VC” = Vicinity, but not at aerodrome. In the US METAR, 5 to 10 SM from the point of observation. In the US TAF, 5 to 10 SM from the center of the runway complex. Elsewhere, within 8000m.
Descriptor
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：美国航行情报汇编 AERONAUTICAL INFORMATION PUBLICATION AIP 1(174)
