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biggyfatben
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Abbreviation for Aviation Routine Weather Report
METAR
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Distribution time for Aviation Routine Weather Report
METAR, Every hour/SPECI for significant changes
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Valid Period for Aviation Routine Weather Report
Current conditions, METAR
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What does the Aviation Routine Weather Report cover?
Compilation of current weather at a specific location. Covers temp, dew point, cloud cover/obscuration ad winds. METAR
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Abbreviation for pilot weather report?
PIRET
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Distribution time for pilot weather report?
No set time UA-routine, UUA-Emergency
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Valid period for PIREP
Current weather conditions
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What does a PIREP cover?
Current conditions in the air. Visibility, wind, turbulence, icing, and clouds.
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Abbreviation for Radar Storm Detection/Weather Reports?
SD/RAREP
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When is are Radar Storm Detection/Weather Reports distributed?
when needed. Radar Storm Detection/Weather Reports
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What is the valid period for Radar Storm Detection/Weather Reports
current conditions. SD/RAREP
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What does the Radar Storm Detection/Weather Reports cover?
Type, intensity, and location of echo top of precip.
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Abbreviation for Area Forecast?
FA
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Distribution time for Area Forecast?
3 times daily. FA
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How long are FA's valid for?
18 hours, area forecast
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What does an FA cover?
Clouds, general weather conditions and Visual Meteorlogical Conditions (VMC) over a large area covering several states.
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What is the abbreviation for the Terminal Aerodrome Forecast?
TAF
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When are TAF's distributed?
4 x's a day. 0000z, 0600z, 1200z, 1800z
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How long are TAF's valid?
30 hours.
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What do TAF's cover?
5 SM radius around the airport. Wind, visibility, significant weather, clouds, and forecast changes.
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What is the abbreviation for an AIRMET?
WA
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How often are AIRMET'S distributed?
Every 6 hours/intermediate as needed.
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How long are WA's good for?
6 hours. AIRMET
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What does an AIRMET cover?
WA, All ac/potential hazards for light ac. Moderate icing, surface winds 30 knots or greater, cielings less than 1,000 ft/vis less than 3SM(IFR), mountain obscurement.
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What are the three abbreviations in an AIRMET?
- T-Turbulence
- Sierra-Mountain obscuration
- Zulu-moderate icing.
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What area must an AIRMET cover?
3000 square miles.
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What is the abbreviation for a SIGMET?
WS
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When are SIGMET's distributed?
Unscheduled, WS
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How long are SIGMETS good for?
4 hours, WS
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What does a SIGMET cover?
Non-convective weather hazards to all ac. Severe icing, turbulence/CAT, dust/sand storms and volcanic ash lowering vis to 3 sm. First issuance designated urgent (UWS).
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What is the abbreviation for a convective sigmet?
WST
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When are WST's distributed?
Convective sigmet, 55 minutes past hour/intermediate as needed.
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How long are WST's valid?
2 hours.
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What does a WST cover?
Convective weather that affects all a/c. Severe thunderstorms, surface winds greater than 50 knots, hail greater than 3/4", tornadoes, embedded thunderstorms, lines or heavy precip that affects 40% or more of a 3,000 square mile region.
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How are WST's numbered?
Sequentially starting at 00z. Convective None for no hazards.
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What is the abbreviation for a Significant Weather Prognostic Chart?
SIG WX PROG
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When are SIG WX PROG distributed?
4 x's a day. 0000z, 0600z, 1200z, 1800z.
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How long are SIG WX PROG's valid?
printed on chart.
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What does the SIG WX PROG cover?
Forecast for sig weather. Top half includes VFR, IFR, MVFR, freezing levels and turbulence. Bottom half includes pressure systems, fronts and pressure centers.
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How often are surface analysis charts distributed, valid time?
Every 3 hours. Current
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What does a surface analysis chart cover?
Current surface weather. Highs and lows, fronts, temps, dew points, winds, local weather and visual obstructions.
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When are weather depiction charts distributed? Valid?
Every 3 hours starting at 0100z. Current weather
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What does a weather depiction chart cover?
Surface conditions derived from METAR. Used for flight planning by giving overall picture of weather across the US. Major fronts, IFR/VFR/MVFR conditions.
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What is the abbreviation for a radar summary chart?
SD
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When are RD's distributed? Valid?
35 minutes past the hour. Current
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What does the RD cover?
Graphical depiction of radar weather reports. Areas of precip and characteristics.
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What does ATIS stand for?
Automatic Terminal Information System
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When is an ATIS distributed? Valid time?
Continuous and current conditions.
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What is an AWOS?
Automated Weather Observation System
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When is AWOS distributed and what is it's valid period?
Continuous, and current conditions.
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Whwat does the ATIS cover?
Non control information at large airports which includes METAR information via digitized voice.
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What does an AWOS cover?
Weather reporting from various sensors via digitized voice.
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What does ASOS stand for?
Automated Surface Observation System
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When is an ASOS distributed and what is its valid period?
Continuously and current conditions.
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What does an ASOS cover?
Surface observation weather via digitized voice.
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What does HIWAS stand for?
Hazardous Inflight Weather Advisory
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When is HIWAS distributed and what is it's valid period?
Continuously and current.
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What does a HIWAS cover?
Broadcasts hazardous weather information over selected NAVAIDS. Contains AIRMETS, SIGMETS, Convective SIGMETS, and urgent PIREPS. Only a summary.
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What does EFAS stand for?
Enroute flight advisory system.
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When are EFAS distributed?
6 am to 10 pm local time.
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What does an EFAS cover?
Flight Watch. Common freq is 122 between 5000 feet AGL and 17,500 MSL.
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What does AFSS stand for and what is it?
Automated flight service station, preflight weather info by calling 1-800-wx-brief
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What does TIBS stand for and what is it?
Telephone info briefing service. Telephone recordings of weather and flight information
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