Weather 4: Planning & Resources Flashcards

1
Q

Flight Visibility

A

Ability to see and indentify prominent unlighted objects by day and prominent lighted objects by night from the cockpit

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2
Q

Prevailing Visibility

A

The greatest horizontal visibility throughout at least half of the horizon circle

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3
Q

Slant Range Visibility

A

Distance on final approach when the runway environment is in sight

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4
Q

Runway Visual Range

A

Horizontal distance looking down the runway

In feet or meters

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5
Q

What defines a ceiling?

A

The lowest broken or overcast cloud layer

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6
Q

What does a surface analysis chart show?

A

Is a depiction of observed weather history (not a forecast)

Shows:
* Pressure centers
* Isobars
* Fronts

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7
Q

What does a prognostic chart show?

A

Is a forecast of future weather

Shows:
* Fronts
* Pressure centers
* Isobars
* Precipitation

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8
Q

What is the difference between a METAR and a TAF?

A

METAR:
* An hourly scheduled observation of current weather conditions
* Determines criteria for takeoff and landing

TAF:
* Gives at least a 24hr forecast (issued every 6 hours)
* Determines the destination weather

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9
Q

What can a NEXRAD RADAR show?

A
  • Hail
  • Tornadoes
  • Microburts
  • Low level wind shear

“HTML”

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10
Q

What are Winds Aloft charts used for?

A

Finding the best headwind/tailwind components and what altitudes to fly to use them to your advantage

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11
Q

What is a PIREP?

A

A voice report given to ATC while airborne to advise other aviators of potential hazards

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12
Q

What are the required reporting conditions for a PIREP?

A

PIREPs are required to be reports when:
* Requested by ATC
* Unusual/unforeseen weather conditions are encountered
* Weather conditions on an IFR approach differ from the latest observation
* A missed approach is executed
* Wind shear is encountered

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13
Q

What are the conditions for a Servere Weather Watch (WW)?

A
  • Hail that is greater than 1inch in diameter
  • Very strong winds
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14
Q

What are the conditions associated with a Convective SIGMET?

A

Severe convective activity:
* Severe turbulence
* Severe Icing
* Low level wind shear

Hail greater than 3/4inch in diameter
Tornadoes
A line of thunderstorms

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15
Q

What are the conditions associated with a Non-Convective SIGMET?

A

Weather Hazards that are not related to thunderstorms

  • Severe icing (that is not due to a thunderstorm)
  • Severe or Extreme turbulence (that is not due to a thunderstorm)
  • Dust/sandstorms that lower visibility to less than 3SM
  • Volcanic Ash
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16
Q

What conditions are associated with AIRMET Sierra?

A

When IFR conditions exist (ceiling less than 1000’ and/or visibility is less than 3SM) for over 50% of the area or mountain obscuration

17
Q

What conditions are associated with AIRMET Tango?

A

Moderate turbulence or sustained surface winds of 30kts or more at the surface

18
Q

What conditions are associated with AIRMET Zulu?

A

Moderate icing and/or freezing levels

19
Q

What is a military weather brief known as?

A

DD Form 175-1