forked from keesL/metar
-
Notifications
You must be signed in to change notification settings - Fork 0
/
README
118 lines (80 loc) · 3.08 KB
/
README
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
$Id: README,v 1.2 2005/06/23 07:07:18 kees-guest Exp $
METAR reports are meteorogical weather reports for aviation. Metar is a small
program which downloads weather reports for user-specified stations and
optionally decodes them into a human-readable format.
Currently, metar supports decoding date/time, wind, visibility, cloud layers,
temperature, air pressure and weather phenomena, such as rain, fog, etc. Also,
more work in the area of clouds need to be done, as support for Cumulus or
Cumulunimbus is not yet decoded.
There is a distinct difference between European METAR reports and US Metar
reports. A US METAR report typically looks like:
KJFK 141751Z 33017G22KT 10SM FEW050 02/M10 A3005 RMK AO2 SLP174 T00221100
10033 20017 51007
This METAR can be decoded as follows:
KJFK John F. Kennedy Airport, New York, New York, This is the ICAO
identifier of the airport.
141751Z The report is of the 14th of the month, at 17:51Z (which is 12:51pm
local time in New York in the winter.)
33017G22KT The wind is coming from the direction of 330 degrees (Northwest)
at 17 knots, with wind gusts to 22 knots.
10SM Visibility at the ground is clear (10 statue miles or more)
FEW050 FEW clouds at 5000 feet. Few is METAR-speak for 2/8 cloud cover.
02/M10 The temperature is 2 degrees Celcius, with the dewpoint at -10C.
A3005 The altimeter setting (air pressure) is 30.05 inches Hg
RMK etc Remarks local to the field.
A European METAR report:
EHAM 141825Z 18010KT 2700 BR SCT003 BKN004 04/04 Q1024 BECMG BKN003
EHAM Amsterdam Schiphol Airport, The Netherlands.
141825Z The report is of the 14th of the month, at 18:25Z (which is 19:25
local time in Amsterdam in the winter.
18010KT The wind is coming from 180 degrees (due South) at 10 knots.
2700 Visibility at ground level is 2700 meters.
BR Mist (visibility at least 5/8 statue mile)
SCT003 Scattered clouds at 300 ft (SCT is 4/8 cover)
BKN004 Broken clouds at 400 ft (BKN is 5/8 through 7/8 cover)
04/04 Temperature 4 degrees C, dewpoint 4 C
Q1024 Air pressure at 1024 hPa
BECMG BKN003 Becoming BK003, cloud layer is changing to BKN at 300 ft.
The program currently supports the following command line paramters:
-d Decode METARs
-h Show a short usage summary
-v Be verbose
Currently recognized weather phenomena are:
Descriptors
MI Shallow
BL Blowing
BC Patches
SH Showers
PR Partial
DR Drifting
TS Thunderstorm
FZ Freezing
VC Vicinity
Weather phenomena
DZ Drizzle
IC Ice Crystals
UP Unkniwn
RA Rain
PL Ice Pellets
SN Snow
GR Hail
SG Snow Grains
GS Small hail/snow pellets
Obscuration
BR Mist (or vis <= 5/8 sm)
SA Sand
FU Smoke
HZ Haze
VA Volcanic Ash
PY Spray
DU Widespread Dust
Other
SQ Squall
FC Funnel Cloud
SS Sand storm
+FC Tornado/Watersprout
DS Dust storm
PO Well developed dust/sand swirls
Metar sources and bug tracking are gracefully hosted by the Debian project.
Please visit http://alioth.debian.org/projects/metar/ for more information.
% END-OF-FILE