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AERODROME WEATHER REPORT CODES

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Presentation on theme: "AERODROME WEATHER REPORT CODES"— Presentation transcript:

1 AERODROME WEATHER REPORT CODES
(ACTUALS) METARS

2 EGGY = Issuing authority, i.e. Bracknell
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = BULLETIN HEADER SA = METAR UK02 = AREA CODE EGGY = Issuing authority, i.e. Bracknell 231020Z : Bulletin Date = 23rd/Bulletin Issue Time = 1020 Zulu or UTC. REPORT TYPE METAR - A/D Actual weather. Compiled half-hourly or hourly while station open SPECI - Aviation selected special weather report (SPECI will not disseminated by either OPMET in UK or MOTNE in Europe) LOCATION INDICATOR ICAO four-letter code e.g. EGSS = Stansted

3 Direction in degrees True (3 digits) to nearest 10°.
SAUK02 EGGY Z METAR EGSS Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = WIND Direction in degrees True (3 digits) to nearest 10°. Wind speed (2 digits), usually 10 minute mean. Followed by Units. KT, KMH or MPS. E.g kt Further 2 or 3 digits preceded by G gives gust speed when it exceeds 10 minute mean by 10 kt or more E.g G30KT Calm indicted by followed by units. Variable wind direction given by VRB followed by speed and units. If direction varies by 60° or more during10 minutes preceding the observation, the observed extremes are given in clockwise order. E.g G30KT 280V350

4 HORIZONTAL VISIBILITY
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = HORIZONTAL VISIBILITY If no marked variation, the minimum given in metres. For marked visibility variation the reported minimum is followed by one of 8 points of the compass. E.g NE If the minimum visibility is less than 1500m and the visibility in another direction is greater then 5000m then both are given. E.g. 1400SW 6000N Visibility of 10 km or more indicated by 9999 Visibility of less than 50 m indicated by 0000

5 RUNWAY VISUAL RANGE (RVR)
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = RUNWAY VISUAL RANGE (RVR) RVR group always prefixed by letter R followed by runway designator, followed by diagonal followed by touchdown RVR in metres. Parallel runways indicated by letters L, R or C. E.g. R24L/1100 When RVR is greater than the maximum reportable value then RVR figure preceded by letter P. E.g. R24L/P1500 When the RVR is less than the minimum reportable value then the RVR figure preceded by the letter M. E.g. R24L/M0050 Until further notice trends and significant variations in RVR will not be reported in the U.K.

6 SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = PRESENT WEATHER CODES BR, HZ, FU, IC, DU and SA will not be reported when the visibility is >5000m

7 Shown by 6 character group. First 3 indicate cloud amount in OKTAS.
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = CLOUD COVER Shown by 6 character group. First 3 indicate cloud amount in OKTAS. FEW = 1 to 2 oktas BKN = 5 to 7 oktas SCT = 3 to 4 oktas. OVC = 8 oktas Last 3 indicate height of cloud base above a/d level E.g: FEW018 = 1 to 2 oktas at 1800 feet above a/d level. Only significant convective cloud identified. CB = Cumulonimbus TCU = Towering Cumulus. E.g: SCT018CB Sky obscured = VV///

8 CLOUD COVER REPORTING SEQUENCE
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = CLOUD COVER REPORTING SEQUENCE First group = Lowest layer of 1 okta or more Second group = Next layer of 3 oktas or more Third group = Next layer of 5 oktas or more. Additional group = Significant convective cloud if not already reported. Cloud groups given in ascending order of height. E.g: FEW005 SCT010 SCT018CB BKN025 If there is no cloud to report and CAVOK does not apply, then SKC (sky clear) reported

9 SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = CAVOK Visibility, RVR, weather and cloud groups replaced by CAVOK when: Visibility is 10 km or more. No cloud below 5000 ft or MSA, whichever is greater, and No CB present No significant weather phenomena at or in vicinity of a/d.

10 AIR TEMPERATURE AND DEW POINT
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = AIR TEMPERATURE AND DEW POINT Given in degrees Celcius. Prefix M indicates negative value. E.g: 10/03; /M01; 00/M00.

11 ALTIMETER SETTING (QNH)
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = ALTIMETER SETTING (QNH) QNH is rounded down to nearest whole millibar. Reported as 4 figure group preceded by letter Q E.g: Q0995 When reported in inches of mercury Prefixed by letter A followed by 4 figure group E.g: A3027 = inches of mercury.

12 SUPPLEMENTARY INFORMATION
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = SUPPLEMENTARY INFORMATION Consists of one or more of the following groups in sequence: Recent weather. Windshear. Trend. Runway state group.

13 Recent weather. E.g: RETS, REGR, RESHRA.
SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = Recent weather. Operationally significant weather observed since last observation or during the past hour, whichever is shorter. Prefixed by letters RE followed by appropriate weather codes. E.g: RETS, REGR, RESHRA.

14 SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = Windshear Inserted when windshear encountered along takeoff or approach paths below 1600 feet with reference to the runway. Prefixed by the letters WS. E.g: WS RWY20, WS ALL RWY. Until further notice, UK aerodromes will not insert windshear groups.

15 SAUK02 EGGY Z METAR EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = TREND This a forecast of significant changes in weather conditions during the two hours following the observation time. Change Indicators BECMG (becoming) TEMPO (temporary) followed by by a 4 figure time group (in hours and minutes UTC) preceded by one of the following, FM (from), TL(until) or AT (at). Weather Standard codes used. NOSIG used when no significant change in weather conditions expected. E.g: BECMG FM G50KT; TEMPO FM0630 TL SHRA.

16 RUNWAY STATE GROUP See handout . SAUK02 EGGY 231020Z METAR
EGSS Z G30KT SW 6000N R24L/P SHRA FEW SCT010CB BKN /03 Q0995 RETS WS RWY23 NOSIG = RUNWAY STATE GROUP See handout .


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