Aviation Weather Services

Question 1

What does this Wind Barb indicate?

Answer 1

270@65kts

Pennant = 50
Long line = 10
Short line = 5
Circle = 0

Question 2

What is the primary source for preflight weather information? How can they be reached?

Answer 2

Flight Service Station

1-800-WXBRIEF
or
www.1800wxbrief.com

Question 3

Only available in Alaska, this weather information source is a recorded broadcast over selected L/MF and VOR facilities

Answer 3

Transcribed Weather Broadcast (TWEB)

Question 4

FIS-B

A _______ __________ _____ _____ service provided through the ______ service network. Some information available on it is…

Answer 4

Flight Information Services-Broadcast

ground information data link
ADS-B

-METAR, TAF, NEXRAD
-AIRMETs, SIGMETs, convective SIGMETs
-TFRs, Special use airspace updates -NOTAMs
-PIREPs

Question 5

ATIS

A continuous broadcast of…

Updated _______, normally ___ minutes past the hour.

Special updates issued _______ the regular hourly cycle when needed.

ATIS is published over the radio and, in locations with _______, via data link (______).

Answer 5

Automatic Terminal Information Service

local weather and NOTAMs

hourly
55

outside

D-ATIS
ACARS

Question 6

AWOS

Automated weather reporting system that broadcasts weather data and is updated _______.

Answer 6

Automated Weather Observing System

hourly

Question 7

ASOS

More sophisticated than AWOS, a weather reporting system that broadcasts surface observations updated by the _______.

Answer 7

Automated Surface Observing System

minute

Question 8

What are the different types of weather briefings?

Answer 8

Standard

Abbreviated

Outlook

Inflight

Question 9

What is a Standard weather briefing?

Answer 9

A full briefing

Question 10

What is an Abbreviated weather briefing?

Answer 10

A shortened version of the standard briefing

Update to a standard briefing

Question 11

What is an Outlook weather briefing?

Answer 11

For departures 6 or more hours away

Used for flight planning

Question 12

Who would you contact for an Inflight weather briefing?

Answer 12

Flight Service Station

Question 13

What is an AIRMET?

Answer 13

• An advisory of significant weather less intense than what’s required to issue a SIGMET. May affect all aircraft but especially small aircraft

Question 14

How long is an AIRMET valid for?

Answer 14

6 hours

Question 15

What are the different types of AIRMETS?

Answer 15

Sierra - IFR, mountain obscuration

Tango - moderate turb, surface winds 30 or greater,
non-convective LLWS

Zulu - moderate icing, freezing levels

Question 16

What is a SIGMET?

Answer 16

An unscheduled advisory of non-convective weather potentially hazardous to all aircraft

Question 17

AIRMETs advise of weather potentially…

Answer 17

hazardous to light aircraft and aircraft with limited operational capabilities.

Question 18

How long is a SIGMET valid for?

What about a SIGMET for a hurricane?

Answer 18

4 hours

6 hours

Question 19

A SIGMET is issued when the following is expected to occur:

Answer 19

• Severe icing not associated with t-storms
• Severe or extreme turbulence or Clear Air Turbulence not associated with t-storms
• Dust storms or sandstorms that lower inflight or ground visibility below 3 miles
• Volcanic ash

Question 20

What is a Convective SIGMET?

Answer 20

An inflight advisory of convective weather significant to the safety of all aircraft.

Question 21

Convective SIGMETs are issued _______ at ____ minutes past the hour for the western (W), eastern (E) and central (C) U.S.

Answer 21

hourly
55

Question 22

How long are Convective SIGMETs valid for?

Answer 22

2 hours

Question 23

On a METAR, what does AO2 mean?

Answer 23

Automated station with precipitation discriminator

Question 24

What does “SLP201” mean on a METAR?

Answer 24

Sea-level pressure

1020.1 millibars

Question 25

What does “SLP954” mean on a METAR?

Answer 25

Sea-level pressure 995.4 millibars

Question 26

A Convective SIGMET contains either an ___________ and a __________ or only a __________.

Answer 26

observation and a forecast forecast

Question 27

What does the COR modifier on a METAR mean?

Answer 27

A corrected report has been issued to replace an earlier report that had an error

Question 28

What does the COR modifier on a METAR mean?

Answer 28

A corrected report has been issued to replace an earlier report that had an error

Question 29

What does R35LVR4500FT mean on a METAR?

Answer 29

Runway 35L visual range is 4,500 feet

Question 30

What does VC mean on a METAR?

Answer 30

Vicinity Within 5 to 10 miles of the point of observation

Question 31

What does VV008 on a METAR mean?

Answer 31

Vertical Visibility is 800 feet

Question 32

RAB05 on a METAR? SNE20?

Answer 32

Rain began at 5 minutes after the hour Snow ended at 20 minutes past the hour

Question 33

RAB05 on a METAR? SNE20?

Answer 33

Rain began at 5 minutes after the hour Snow ended at 20 minutes past the hour

Question 34

The Terminal Aerodrome Forecast (TAF) is a forecast for weather conditions within a _____ radius from the center of a selected airports runway complex. Is issued _____ times a day at 00, 06, 12, and 18 Zulu for a ____ or ____ hour time period.

Answer 34

5 sm four 24 or 30

Question 35

What does WS020/35035KT mean on a METAR/TAF?

Answer 35

Wind shear at 2,000 feet, wind from 350 at 35 knots

Question 36

Is VV008 considered a ceiling?

Answer 36

Yes

Question 37

Forecast Change Indentifiers FM = ______. A rapid, significant change is expected occurring in less than ____ hour BECMG = ________. Gradual change expected occurring for less than _____ hours TEMPO = _________. Temporary fluctuations expected to last for less than ____ hour during less than _____ of the time period

Answer 37

From one Becoming two Temporary one half

Question 38

Winds at BIH at 9,000 feet? BLH at 30,000 feet? FAT at 6,000 feet?

Answer 38

BIH = 130 at 12kts, -2*C BLH = 230 at 66kts, -42*C FAT = 130 at 8kts, 8*C ** Minus sign is omitted above 24,000 feet**

Question 39

What are winds and temp at JAX at 34,000 feet?

Answer 39

Question 40

What are the winds and temp at BIH at 6,000 feet?

Answer 40

Question 41

What does this mean in the remarks section of a METAR? 56012 52022 54045

Answer 41

First Number: 5 = atmospheric pressure Second Number: 123 = increasing pressure in last 3 hrs 4 = pressure stayed the same 5678 = pressure decreased in last 3 hrs Last two numbers are the amount. 12 = .12