METAR Decoding Information
METAR code is a standardized textual format for describing weather
conditions at wx stations and airports. To decode
items, use the table below (applies to METAR and TAF items):
|
METAR
KPIT
091955Z COR 22015G25KT 3/4SM R28L/2600FT TSRA
OVC010CB 18/16 A2992 RMK SLP045 T01820159
TAF KPIT
091730Z 091818 15005KT 5SM HZ FEW020 WS010/31022KT
FM1930 30015G25KT 3SM SHRA OVC015 TEMPO 2022 1/2SM +TSRA
OVC008CB FM0100 27008KT 5SM SHRA BKN020 0VC040
PROB40 0407 1SM -RA BR FM1015 18005KT 6SM -SHRA
OVC020 BECMG 1315 P6SM NSW SKC |
|
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 |
|
091818 |
Valid period:
2-digit date, 2-digit beginning, 2-digit ending times |
|
In U.S. METAR:
CORrected ob; or AUTOmated ob for automated report 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
Plus 6SM. (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 Varialbility 4-digit value (and tendency Down, Up or No change) |
R28L/2600FT |
HZ |
Significant present, forecast and recent weather: see table (below) |
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" |
OVC010CB |
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 hundredths; (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 |
| 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 |
|
|
| FM1930 |
FroM and 2-digit hour and 2-digit
minute beginning time: indicates significant change.
Each FM starts on a new line, indented 5 spaces.
|
| TEMPO 2022 |
TEMPOrary: changes expected for < 1 hour and in total, < half of 2-digit hour beginning and 2-digit hour ending time period
|
|
PROB40 0407
|
PROBability and 2-digit percent (30 or 40): probable condition during 2-digit hour beginning and 2-digit hour ending time period
|
| BECMG 1315 |
BECoMinG: change expected during 2-digit hour beginning and 2-digit hour ending time period
|
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.
QUALIFIER
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 center of runway complex (elsewhere within 8000m)
| Descriptor: |
Precipitation: |
MI Shallow
BC Patches
PR Partial
TS Thunderstorm
BL Blowing
SH Showers
DR Drifting
FZ Freezing
|
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
|
| Obscuration: |
Other: |
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
|
|