1. Time of Observation...in this case "10Z"
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Note: This is not normally in METAR data, but has
been added to simplify when the observation was issued. To go from "Z" time to Central Daylight Time (CDT), subtract 5
hours (1000Z is 0500 or 500 am CDT). To go to Central Standard Time (CST), subtract 6
hours (1000Z is 0400 or 400 am CST). |
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2. Station...in this case "KLIT" or Little
Rock National Airport. |
3. Date/Time of Observation...in this case
"200953Z" |
Note: The first 2 numbers represent the day of
the month, with the last 4 numbers representing the Z-time. |
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4. Wind Speed/Direction...in this case
"00000KT" |
Note: The first 3 numbers represent the wind
direction. "360" is NORTH, "090" is EAST, "180" is SOUTH and
"270" is WEST. The last 2 numbers represent the wind speed in knots. To go from
knots to MPH, multiply by 1.15. "00000" means that the wind is CALM. |
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5. Visibility...in this case "4SM"
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Note: The visibility is in "SM" or
STATUTE MILES. If the visibility is 7 or higher, there are no visibility restrictions. If
the visibility is less than 7 miles, something is restricting the visibility such as
precipitation or an obscuration. Visibility Restriction
(Precipitation): Precipitation may come in several forms, with the most
common including DZ (drizzle), RA (rain), SN (snow), PL (sleet), GS (small hail), GR
(larger hail), or UP (unknown precipitation). The precipitation may have a descriptor such
as TS (thunderstorm...usually combined with RA), SH (shower...usually combined with RA)
and FZ (freezing...usually combined with RA or DZ). Precipitation intensities
include - (light), no sign (moderate) and + (heavy).
Visibility Restriction (Obscuration): Obscurations, like
precipitation, come in several forms, with the most common including BR (mist...greater
than or equal to 5/8SM), FG (fog...less than 5/8SM), HZ (haze) and FU (smoke). |
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6. Sky Condition...in this case "OVC030"
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Note: The first three letters indicate cloud
coverage in eighths. 0/8 is SKC or CLR (clear), 1/8 and 2/8 is FEW (few clouds), 3/8 and
4/8 is SCT (scattered), 5/8 through 7/8 is BKN (broken) and 8/8 is OVC (overcast). The
next three numbers indicate the height of the clouds in hundreds of feet. Example:
"OVC030" means overcast at 3,000 feet. |
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7. Temperature/Dewpoint...in this case "07/05"
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Note: The first two numbers represent the
temperature in celsius. The second two numbers following the slant (/) represent the
dewpoint in celsius. If the numbers happen to be preceded by an "M", that is a
below zero celsius reading (example: "M05" means MINUS 5 celsius). To convert
celsius to fahrenheit, or to determine the relative humidity, use a meteorological
calculator. |
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8. Altimeter...in this case "A3013" |
Note: The "A" stands for ALTIMETER with
the next 4 numbers representing the pressure in inches (example: "3013" means
30.13 inches). |
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9. Remarks...in this case "AO2 SLP205" |
Note: The remarks section of an observation may
have a variety of data. The most common remarks include "AO2" indicating an ASOS observation and SLP indicating sea level pressure in
millibars (example: "SLP205"means a sea level pressure of 1020.5 millibars).
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