aviation

• message type:TAF-routine or TAF AMD-amended forecast,METAR-hourly, SPECI-special or TESTM-non-commissioned ASOS report
• METAR

• ICOA location indicator
• KPIT

• inssuance time:ALL times in UTC"Z", 2-digit date,4-digit time
• 091955Z

• vaild period:2-digit date,2-digit beginning,2-digit ending times
• 091818

• in U.S. METAR:CORrected ob; or AUTOmated ob for automated report with no human intervention; omitted when observer logs on
• COR

• 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,Variablility appended,e.g. 180V260
• 22015G25KT

• prevailing visibility:in U.S., Staute Miles & fractions;above 6 miles in TAF Plus6SM,(or 4-digit minimum visibility in meters and as required,lowest value with direction
• 3/4SM

• 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

• significant present, forecast and recent weather:
• TSRA (see table on back)

• 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 bleow 12,000 feet)
• OVC010CB

• temperature:degrees CELSIUS; first 2-digit, temperature "/" last 2-digit, dew-piont temperature;Minus for below zero e.g. M06
• 18/16

• altimeter setting:indicator and 4-digits; in U.S., A-inches and hundreds;(Q-hectoPascals, e.g. Q1013)
• A2992

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

in METAR, ReMarK indicator & remarks.for example:Sea-Level Pressure in hecto-pascals & tenths, as shown:1004.5 hPa;Temp/dew-piont in tenths degree C, as shown:temp 18.2 degree C, dew-piont 15.9 degree C

• FroM and 2-digit hour and 2-digit minute beginning time:indicates significant change. each FM starts on new line, indented 5 spaces
• FM1930

TEMPOrary: changes expected for <1 hour and in total,<half of 2-digit hour beginning and 2-digit hour ending time period

PROBability and 2-digit percent (30 or 40):probable condition during 2-digit hour beginning and 2-digit hour ending time period

BECoMinG:change expected during 2-digit hour beginning and 2-digit hour ending time period

• intensity or proximity
• '-' light " no sign" moderate '+' heavy
• VC vicinity: but not at aerodrome; in U.S. METAR, between 5 and 10SM of the point(s) of observation; in U.S. TAF 5 to 10SM from the center of runway complex(elsewhere within 8000m)

• MI SHALLOW BC PATCHES PR PARTIAL TS THUNDERSTORM
• BL BLOWING SH SHOWERS DR DRIFTING FZ FREEZING

• PRECIPITATION
• DZ DRIZZLE RA RAIN SN SNOW SG SNOW GRAINS
• IC ICE CRYSTALS PL ICE PELLETS GR HAIL GS SMALL HAIL/SNOW PELLETS
• UP UNKNOWN PRECIPITATION IN AUTOMATED OBSERVATIONS

• BR MIST(>5/8SM) FG FOG(< 5/8SM) FU SMOKE VA VOLCANIC ASH
• SA SAND HZ HAZE PY SPRAY DU WIDESPREAD DUST

• SQ SQUALL SS SANDSTORM DS DUSTSTORM PO WELL DEVELOPED
• FC FUNNEL CLOUD +FC TORNADO/WATERSPOUT DUST/SAND WHIRLS