Term
| Unequal heating of the Earth's surface |
|
Definition
| What is the cause of variations in altimeter settings between weather reporting points? |
|
|
Term
| Friction between the wind and the surface...winds aloft 5000 ft are largely affected by coriolis force. |
|
Definition
| The wind at 5000 ft AGL is SW while the surface wind is S. Why is there a difference? |
|
|
Term
| Cool dense air moving inland from over water |
|
Definition
| Convective circulation patterns with sea breezes are caused by, what? |
|
|
Term
|
Definition
| Development of thermals depends on, what? |
|
|
Term
|
Definition
| Term for boundary between 2 air masses. |
|
|
Term
|
Definition
| What changes when flying across a front? |
|
|
Term
|
Definition
| If there is a thunderstorm at the local airport, which hazardous phenomenon might be expected in the landing approach? |
|
|
Term
|
Definition
| Nonfrontal, narrow band of active thunderstorms ahead of a cold front is known as what? |
|
|
Term
1. High humidity
2. Lifting force
3. Unstable conditions |
|
Definition
| What three conditions are neccesary for a thunderstorm to develop? |
|
|
Term
|
Definition
| Which stage in the thunderstorm life cycle is characterized by downdrafts? |
|
|
Term
|
Definition
| Which stage does a thunderstorm reach greatest intensity? |
|
|
Term
|
Definition
| What is normally associated with the cumulus stage of thunderstorms? |
|
|
Term
|
Definition
| Does precipitation falling signify the mature stage of a T-storm? |
|
|
Term
|
Definition
| In-flight condition neccesary for structural icing to form is...? |
|
|
Term
|
Definition
| When would structural icing be most likely? |
|
|
Term
|
Definition
| Almond-shaped cloud which appears stationary but which may contain winds up to 50 knots is referred to as what? |
|
|
Term
|
Definition
| When winds of 40 knots or greater blow across a mountain ridge and the air is stable, it can cause what? |
|
|
Term
|
Definition
| Eddies in between two wind currents of differing velocities, direction, or both. Occurs at all altitudes and in all directions. |
|
|
Term
1. Low-level temp. inversion
2. Frontal zones
3. Clear air turbulence |
|
Definition
| What three things can contribute to wind shear? |
|
|
Term
| Fog or low clouds develop |
|
Definition
| What happens when the temp./dew point decreases? |
|
|
Term
|
Definition
| The temperature to which air must be cooled to become saturated or have 100% humidity...what am I? |
|
|
Term
| Temp. of collecting surface is at or below the dewpoint of the adjacent air and the dewpoint is below freezing. |
|
Definition
| What conditions result in frost formation? |
|
|
Term
|
Definition
| Clouds, fog and dew will always form when water vapor ____________? |
|
|
Term
|
Definition
| Forms in winter when cold, dry air passes from land areas over comparatively warm ocean waters and is composed entirely of water droplets that often freeze quickly...what am I? |
|
|
Term
| When moist air moves over colder ground or water. Most common in coastal areas. |
|
Definition
| When does advection fog form? |
|
|
Term
|
Definition
| Shallow fog of which ground fog is one form. It occurs under clear skies, little or no wind and a small temp./dew point spread...what am I? |
|
|
Term
|
Definition
| Forms when wind blows moist air upwards over rising terrain and the air cools below the dew point....what am I? |
|
|
Term
1. High clouds
2. Middle clouds
3. Low clouds
4. Clouds with extensive vertical development |
|
Definition
| What are the four families of clouds? |
|
|
Term
|
Definition
| The suffix "nimbus" refers to what? |
|
|
Term
|
Definition
| The conditions necessary for the formation of cumulonimbus clouds are a lifting action and.....? |
|
|
Term
| Towering cumulus clouds (they are an early stage of cumulonimbus clouds) |
|
Definition
| What cloud type would indicate convective turbulence? |
|
|
Term
|
Definition
| When air rises in a convective current, it cools at a rate of 5.4 degrees/1000 ft. The dew point decreases at 1 degree/1000 ft. The temp. and dewpoint are then converging at what ratio?? |
|
|
Term
3000 ft.
(Formula: 69-56=13 degrees.
13/4.4=2.95
Round 2.95 to 3 and it equals 3000 ft.)
|
|
Definition
| The surface dewpoint is 56 degrees. The surface temp is 69 degrees. What is the cloud base of cumulus clouds in feet? |
|
|
Term
[image]
Stratiform Clouds |
|
Definition
| What is a characteristic of stable air? |
|
|
Term
| Clouds with large vertical development and associated turbulence |
|
Definition
| If an unstable air mass is forced upward, what type of clouds can be expected? |
|
|
Term
1. Turbulence
2. Good surface visibility |
|
Definition
| Two characteristics of unstable air?? |
|
|
Term
| Stratiform clouds, fog, continuous precipitation, smooth air and fair to poor visibility. |
|
Definition
| Characteristics of a stable air mass include...? |
|
|
Term
| Actual lapse rate. (Warm air rises when the air above is cooler. The actual lapse rate is the decrease of temp. with altitude, and is therefore a measure of stability.) |
|
Definition
| What measurement can be used to determine the stability of the atmosphere? |
|
|
Term
|
Definition
| What would decrease stability? |
|
|
Term
|
Definition
| What feature is associated with temperature inversion? |
|
|
Term
| An increase in temp. as altitude increases |
|
Definition
| A temperature inversion would most likely result in what? |
|
|
Term
| Smooth air, poor visibility, fog or low clouds |
|
Definition
| What weather conditions would be expected beneath a low-level temperature inversion layer when humidity is high? |
|
|
Term
|
Definition
| Which type of briefing should a pilot request to supplement mass disseminated data? |
|
|
Term
|
Definition
| A weather briefing that is provided when the info requested is 6 or more hours in advance of departure is...? |
|
|
Term
1. Identify yourself as a pilot
2. Your intended route
3. Your intended destination
4. Whether you are flying VFR or IFR
5. Type of aircraft
6. Departure time and time en route |
|
Definition
| When requesting a telephone briefing, you should do what six things? |
|
|
Term
1. METAR (routine weather report)
2. SPECI (nonroutine weather report) |
|
Definition
| What are the two types of reports in weather observation? |
|
|
Term
As a five-digit group (6 digits if the wind speed is greater than 99 knots). It is appended with the abreviation KT (knots) G=gusty
**EXAMPLE: 11012G18KT would be wind from 110 true at 12 knots with gusts up to 18 knots.** |
|
Definition
|
|
Term
| In statute miles with SM appended to it. EXAMPLE: 2 1/2SM= visibility is 2.5 statute miles |
|
Definition
| How is visibility reported? |
|
|
Term
|
Definition
| What two letter abbreviation stands for rain? |
|
|
Term
| Within 3 digits in hundreds of feet AGL. EXAMPLE: OVC007 means overcast cloud layer at 700 ft AGL. |
|
Definition
| How are cloud bases reported? |
|
|
Term
| Rain began at 35 min. past the hour |
|
Definition
| What does RAB35 mean on a report? |
|
|
Term
| 1000 ft ceiling and/or 3 statute mile visibility |
|
Definition
| What are the VFR weather minimums? |
|
|
Term
|
Definition
| What does SKC stand for in a report? |
|
|
Term
|
Definition
| If terrain elevation is 1295 ft MSL, the base ceiling is 1800 ft, what is the height between ground level and base of ceiling? |
|
|
Term
WV refers to the wind section. If it is 08021, this means the temp. is 80 degrees and the wind is at 21 knots.
TA M7 stands for the temperature and M stands for a temp. below zero. Therefore, TA M7 is -7 degrees celsius. |
|
Definition
| In a PIREP, what would WV 08021 and TA M7 stand for? |
|
|
Term
| Light turbulence from 5500-7200 ft. |
|
Definition
| What does TB LGT 055-072 mean? |
|
|
Term
IC refers to icing conditions. LGT-MDE RIME refers to light to moderate rime.
NOTE: Rime is a type of ice. It is water droplets that become suspended in clouds when temperatures are below freezing.
Read more: http://wiki.answers.com/Q/What_is_Rime#ixzz1cU1MB35U
|
|
Definition
| What does IC LGT-MDT RIME stand for? |
|
|
Term
| Gives the forecast of general weather predictions throughout several states or portions of states. It is used for expected en route weather. |
|
Definition
| What is an aviation area forecast intended for? |
|
|
Term
| Inflight Aviation Weather Advisories |
|
Definition
| Who should you refer to to determine freezing level and areas of probable icing aloft? |
|
|
Term
| Clouds and weather which cover an area greater than 3000 square miles and is significant to VFR operations. This section contains a 12-hour specific forecast. |
|
Definition
| What does the section of Area Forecast entitled "VFR CLDS/WX" contain a description of? |
|
|
Term
|
Definition
| What two letter abbreviation stands for showers? |
|
|
Term
|
Definition
| The only cloud type forecast in a TAF is...? |
|
|
Term
|
Definition
| Depiction charts are an outline of the USA. Reporting stations are marked with little ______? |
|
|
Term
1. Open circle~ Clear
2. Solid circle~ Overcast
3. 1/4 Solid Circle~ Scattered
4. 3/4 Solid Circle~ Broken
5. X inside Circle~ Obscured
|
|
Definition
For weather depiction charts,
if the sky is clear the circle is _____?
If overcast the circle is______?
If scattered the circle is______?
If broken the circle is _______?
Obscured, the circle is_______? |
|
|
Term
| Breaks in overcast clouds |
|
Definition
| A solid circle with a white line through it indicates? |
|
|
Term
|
Definition
| Cold fronts are depicted with with type of line? |
|
|
Term
|
Definition
| Warm fronts are depicted in what type of line? |
|
|
Term
|
Definition
| What is the difference between a stationary and occluded front line? |
|
|
Term
Types of precipitation...
R=rain
RW= rain shower
S=snow
SW= snow shower |
|
Definition
| R, RW, S and SW all stand for what? |
|
|
Term
| Visibility is 3 statute miles. Sky cover is broken. There is currently rain and the ceiling is 1200 ft. |
|
Definition
[image]
What are the conditions for this example? |
|
|
Term
| Severe weather watch areas |
|
Definition
| What does a heavy dashed line that forms a large box on a radar summary chart refer to? |
|
|
Term
| 9900 and less than 5 knots |
|
Definition
| When winds are light and variable in reference to Winds Aloft forecast, the coded group and windspeed is? |
|
|
Term
|
Definition
| What values are used in Winds Aloft Forecasts? |
|
|
Term
| The wind is 230 degrees true and 39 knots. |
|
Definition
| 2339 in a Winds Aloft Forecast means...? |
|
|
Term
| 200 degrees true at 6 knots. Temperature is 3 degrees celsius. |
|
Definition
| What does 2006+03 indicate on a Winds Aloft forecast? |
|
|
Term
| They forecast conditions 12 and 24 hours in the future. Include 2 types of forecasts: low level significant weather, and moderate or greater turbulence areas/freezing levels. |
|
Definition
| What are significant weather prognostic charts? |
|
|
Term
|
Definition
| What does a peaked hat in weather prognostic charts mean? |
|
|
Term
| The altitude....180 translates into 18000 ft. |
|
Definition
| 180 with a line underneath on a weather prognostic chart means...? |
|
|
Term
| All aircraft for hazardous weather condition |
|
Definition
| SIGMETS are issued as a warning to...? |
|
|
Term
| Tornadoes, embedded thunderstorms, hail greater than 3/4" in diameter |
|
Definition
| What weather is included in a convective SIGMET? |
|
|
