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28.  Key to Aerodrome Forecast (TAF) and Aviation Routine Weather
Report (METAR)

FIG 7

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Key to Aerodrome Forecast (TAF) and Aviation Routine Weather Report
(METAR) (Front)

Key to Aerodrome Forecast (TAF) and Aviation

Routine Weather Report (METAR) (Front)

TAF

KPIT 091730Z 0918/1024 15005KT 5SM HZ FEW020 WS010/31022KT

FM091930 30015G25KT 3SM SHRA OVC015
TEMPO 0920/0922 1/2SM +TSRA OVC008CB
FM100100 27008KT 5SM SHRA BKN020 OVC040
PROB30 1004/1007 1SM -RA BR
FM101015 18005KT 6SM -SHRA OVC020
BECMG 1013/1015 P6SM NSW SKC

NOTE

: Users are cautioned to confirm

 and

TIME

 of the TAF. For example FM

0000 is

0000Z on the

10th

. Do not confuse with

1000Z!

METAR

 KPIT 091955Z COR 22015G25KT 3/4SM R28L/2600FT TSRA OVC010CB 18/16
A2992 RMK

SLP045 T01820159

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

0918/1024

Valid period, either 24 hours or 30 hours.  The first two digits of
EACH
four digit number indicate the date of the valid period, the final two
di
gits indicate the time (valid from 18Z on the 9

 to 24Z on the 10

).

In U.S. METAR: CORrected ob; or AUTOmated ob for automated re
port 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 Plus6SM. (Or, 4-digit minimum visibility in meters and as re
quired, lowest value with direction)

SM

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 Variability 4-digit value
(and
tendency Down, Up or No change)

R28L/2600FT

HZ

Significant present, forecast and recent weather: see table (on back)

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"

OVC 010CB

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 hun
dredths; (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

Meteorology

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