AERODROME AERODROME WEATHER REPORT WEATHER REPORT
CODESCODES(ACTUALS(ACTUALS))
METARSMETARS
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
METAR - A/D Actual weather. Compiled half-hourly or
hourly while station open
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
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
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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. 31015kt
•Further 2 or 3 digits preceded by G gives gust speed when it exceeds 10 minute mean by 10 kt or moreE.g. 31015G30KT
•Calm indicted by 00000 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. 31015G30KT 280V350
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. 4000 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 6000NVisibility of 10 km or more indicated by 9999
Visibility of less than 50 m indicated by 0000
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
PRESENT WEATHER CODESQualifier Weather Phenomena
Intensity orProximity
Descriptor Precipitation Obscuration Other
MI - Shallow DZ – Drizzle BR - Mist
BC - Patches RA – Rain FG - Fog
PO – Dust/SandWhirls (Dust Devils)- Light
BL Blowing SN – Snow FU - Smoke SQ - Squalls
SH - Showers SG – Snow Grains VA – Volcanic Ash FC – Funnel Cloud(s) (tornado or water-spout)
TS - Thunderstorms IC – Ice Crystals (Diamond Dust)
DU – WidespreadDust
SS - Sandstorm
Moderate(no qualifier)
+ Heavy(Well developed inthe case of FC andPO)
FZ – Freezing (Super-cooled)
PE – Ice Pellets SA - Sand
GR – HailVCIn the vicinity (not atthe aerodrome butnot further awaythan approx 8 kmfrom the a/dperimeter.)
PR – Partial (covering part of aerodrome) GS – Small Hail
(<5 mmdiameter) and/or snow pellets
HZ - Haze
DS - Duststorm
BR, HZ, FU, IC, DU and SA will not be reported when the visibility is >5000m
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
CLOUD COVER
Shown by 6 character group.First 3 indicate cloud amount in OKTAS.
FEW = 1 to 2 oktasSCT = 3 to 4 oktas.
BKN = 5 to 7 oktas
Only significant convective cloud identified.
CB = Cumulonimbus
TCU = Towering Cumulus.
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.
E.g: SCT018CB
OVC = 8 oktas
Sky obscured = VV///
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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.
Cloud groups given in ascending order of height.
E.g: FEW005 SCT010 SCT018CB BKN025
Additional group = Significant convective cloud if not already reported.
If there is no cloud to report and CAVOK does not apply, then SKC (sky clear) reported
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
AIR TEMPERATURE AND DEW POINT
Given in degrees Celcius.
Prefix M indicates negative value.
E.g: 10/03; 01/M01; 00/M00.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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 = 30.27 inches of mercury.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
SUPPLEMENTARY INFORMATION
Consists of one or more of the following groups in sequence:
Recent weather.
Windshear.
Trend.
Runway state group.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
TRENDThis 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 FM1100 25035G50KT;
TEMPO FM0630 TL0830 3000 SHRA.
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
RUNWAY STATE GROUP
See handout .
SAUK02 EGGY 231020Z
METAR
EGSS 231020Z 31015G30KT 1400SW 6000N R24L/P1500 SHRA FEW005 SCT010CB BKN025 10/03 Q0995 RETS WS RWY23 NOSIG 88290592=
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