Can someone explain me how to read SIGMETs and AIRMETs?

Question

I saw in a map about turbulance but, I couldnt understand...is it very difficult to understand?

Answer 1

Putting it simply, an AIRMET is weather that can have a significant affect on small airplanes whereas a SIGMET is weather that can have a significant affect on all airplanes.

Answer 2

Will you choose mine the bestone.?????????????????

AIRMET

An AIRMET, or Airmen's Meteorological Information, is a weather advisory for aircraft that is potentially hazardous to aircraft with limited capability. [1] Compared to SIGMETs, AIRMETs cover less severe weather: moderate turbulence and icing, surface winds of 30 knots, or widespead restricted visibility.

AIRMETs are broadcast on the ATIS at ATC facilities, and are referred to as Weather Advisories. AIRMETs are valid for six hours.

There are three types of AIRMET, all identified by a phonetic letter: S (Sierra), T (Tango), and Z (Zulu). Sierra describes IFR conditions or mountain obscurations. Tango describes turbulence, high winds, or nonconvective Low Level Wind Shear. Zulu deals with icing and freezing levels. [2]

SIGMET

nt Meteorological Information, is a weather advisory that contains meteorological information concerning the safety of all aircraft. There are two types of SIGMETs, convective and non-convective. The criteria for a non-convective SIGMET to be issued are severe or greater Turbulence over a 3000 sq mile area, or Severe or greater Icing over a 3000 sq mile area or IFR conditions over a 3000 sq mile area due to dust, sand, or volcanic ash [1].

This information is usually broadcast on the ATIS at ATC facilities. A SIGMET is a forecast valid for up to four hours. They are assigned an alphabetic designator from N (November) through Y (Yankee), excluding S and T. [2]

A Convective SIGMET is issued for convection over the Continental U.S. Convective SIGMETs are issued for an area of thunderstorms affecting an area of 3000 sq miles or greater, a line of thunderstorms at least 60nm long, severe and/or embedded thunderstorms affecting any area that are expected to last 30 minutes or longer. [3]

Convective SIGMETs are valid for two hours.

Answer 3

SIGMET - GAMET - AIRMET
SIGMETs are spent in English language and f?jeden day around 0001 beginning, going through numbered. Their validity period is counted less, limited in general mines to one period of 4 hours or, from the transmission time on.

GAMETmessages are area forecasts for the lower air space for a fluginformationsgebiet (FIR) or a part away and contain prognoses of significant meteorological phenomena.

AIRMETmessages are warnings of the occurrence of significant meteorological phenomena, which have effects on aviation in the lower air space. AIRMETs are only if necessary spent. The message format corresponds to the well-known SIGMET.
AIRMET's are formulated in the English plain language short form of the I.C.A.O.. They are internationally exchanged and are for the lower air space to flat steel bar 100, in the FIR Munich to flat steel bar 150 valid.
AIRMET information controls flying pilots additionally of the DFS with the test flight in a FIR over radio communicated. VFR pilots, who are without regular funkkontakt with the DFS on the way, is recommended, to respond the air traffic control in own interest to possibly spent AIRMETs.

GAMET/AIRMET messages must be used because of the restriction on the forecast of significant meteorological phenomena SIGMETs spent by moderate intensity in close relationship with. Their use does not relieve the pilot to inform comprehensively.

Phraseologie of SIGMET AIRMET and GAMET messages
Surface wind
A condition spreads middle wind velocity > = 30 kt
Contents Wind direction and medium speed
Identification SFC WSPD (surface wind speed)
Example SFC WSP: 290-330/35KT
Horizontal range of vision at the soil
A condition Range of vision spreads < 5000 m
Contents Range of vision
Identification SFC VIS (surface visibility)
Example SFC VIS: IN COASTEL AREAS 3000M
Significant meteorological phenomena
A condition Thunderstorm with or without hail (except if already in SIGMET announced)
Contents Meteorological phenomenon
Identification SIGWX (significant weather)
Example SIGWX: ISOL TS S OF 52 DEG N
Mountains in clouds
A condition Mountains are totally or partly in clouds
Contents Height, starting from which mountains are in clouds
Identification MT OBSC (mountains obscured)
Example MT OBSC: ABV 2000 FT MSL
Cloudy appearance
A condition spreads cloudy appearance with degree of coverage BKN or OVC < 1000ft, occurrence of Cumulonimbus without thunderstorms
Contents Degree of coverage, lower bound, distribution of Cb
Identification CLD (cloud)
Example CLD: OVC 500 FT
CLD: OCNL CB IN E PARTS
Freezing up
A condition moderate freezing up (not in convective cloudy appearance), except if before strong turbulence already in the SIGMET is warned.
Contents Intensity, elevator range
Identification ICE (icing)
Example ICE: MOD FLAT STEEL BAR 050/080
Turbulence
A condition moderate turbulence (not in convective cloudy appearance) is warned, except if before strong turbulence already in the SIGMET
Contents Intensity elevator range
Identification TURB (turbulence)
Example TURB: MOD BLW FLAT STEEL BAR 050
Leewellen
A condition Leewellen of moderate intensity, except if before strong leewellen already in the SIGMET warned
Contents Intensity elevator range
Identification MTW (mountain waves)
Example MTW: MOD ABV FLAT STEEL BAR 080
SIGMETs
A condition valid SIGMETs at the time of the GAMET expenditure, which are for the lower air space from Bedeuetung
Contents current No. of the SIGMETs
Identification SIGMETS APPLICABLE
Example SIGMETS APPLICABLE:2

to? to the start of page

Degree of coverage:
briefly Eighth Erkl?ng
SKC 0 sky CLEARS
FEW 1-2 few
SCT 3-4 scattered
BKN 5-7 broken
OVC 8 overcast

to? to the start of page

Weather:
briefly explanation Erkl?ng
BLSN widespread blowing snow spreads schneetreiben
BR widespread muck spreads damp vapor
DZ drizzle Spr?egen
FG widespread fog spreads fog
FU widespread smoke spreads smoke
FZRA freezing rain freezing rain
FZDZ Freezing drizzle freezing Spr?egen
Cycles per second widespread haze spreads dry vapor
NIL ONE NIL ONE no significant meteorological phenomena
RA rain Rain
SH more shower Shower
SN snow Snow
TS active thunderstorm active thunderstorm cells
XXSA sand or duststorm Sand or staubsturm

to? to the start of page

CB quantity specifications:
briefly explanation Erkl?ng
ISOL isolated individual CBs
OCNL occasional more frequent, but still clearly separated CBs
FRQ frequently frequent CBs, which are hardly or not at all separate
EMBDd embedded into other clouds stored or CBs hidden in the vapor

to? to the start of page

Cloud kinds:
briefly Erkl?ng
ST Stratus
LV Nimbostratus
Cu Cumulus
Sports club Stratocumulus
AC Altocumulus
AS Altostratus
CB Cumulonimbus
to? to the start of page
to? to homepage