FIG 7 − 1 − 22 Key to Aerodrome Forecast (TAF) and Aviation Routine Weather Report (METAR) (Back) 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 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 BC  – Patches BL  – Blowing DR  – Drifting FZ  – Freezing MI  – Shallow PR  – Partial SH  – Showers TS  – Thunderstorm Weather Phenomena Precipitation DZ  – Drizzle GR  – Hail GS  – Small Hail/Snow Pellets IC  – Ice Crystals PL  – Ice Pellets RA  – Rain SG  – Snow Grains SN  – Snow UP  – Unknown Precipitation in automated observations Obscuration BR  – Mist (≥5/8SM) DU  – Widespread Dust FG  – Fog (<5/8SM) FU  – Smoke HZ  – Haze PY  – Spray SA  – Sand VA  – Volcanic Ash Other DS  – Dust Storm FC  – Funnel Cloud +FC  – Tornado or Waterspout PO  – Well developed dust or sand whirls SQ  – Squall SS  – Sandstorm 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. - Explanations in parentheses “()” indicate different worldwide practices. - Ceiling is not specified; defined as the lowest broken or overcast layer, or the vertical visibility. - NWS TAFs exclude BECMG groups and temperature forecasts, NWS TAFS do not use PROB in the first 9 hours of a TAF; NWS METARs exclude trend forecasts. US Military TAFs include Turbulence and Icing groups. Meteorology 7 − 1 − 60 AIM  7110.65R CHG 2 AIM 8/15/19 3/15/07 1/30/20