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Aviation Weather Services Flashcards

0
Q

Light icing

A

Rate of accumulation may create a problem if flight is prolonged for over 1 hour

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1
Q

Trace Icing

A

Ice becomes perceptible. Rate of accumulation is slightly greater than sublimation. Deicing equipment is not required unless encountered for extended period of time

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2
Q

Severe icing

A

Rate if accumulation is such that deicing equipment fails to reduce or control the hazard

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3
Q

Moderate icing

A

Rate if accumulation is such that short encounters become potentially hazardous

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4
Q

Define METAR

A

Aviation Routine Weather Report 3.1.1

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4
Q

Define TIBS

A

Telephone Information Briefing Service 1.3.4

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4
Q

What is TIBS

A

Continuous telephone recording if meteorological and aeronautical information. Used as a preliminary briefing tool 1.3.4

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4
Q

What is HIWAS

A

Hazardous Inflight Weather Advisory Service Broadcast hazardous weather information continuously over selected NAVIDS 1.3.5

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4
Q

Define EFAS

A

En Route Flight Advisory Service Flight Watch 1.3.6

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5
Q

What frequency is Flight Watch?

A

122.0 Below FL180 1.3.6

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6
Q

What is a primary weather product?

A

A weather product that meets all the regulatory requirements and safety needs for use in making weather related flight decisions 2.1.1

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7
Q

What is a supplemental weather product?

A

A weather product is an aviation weather product that may be used for enhanced situational awareness 2.1.2

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8
Q

HIWAS Service Volume

A

150nm 1.3.5

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9
Q

Between what hours may TIBS have reduced operations?

A

1800-0600 1.3.4

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10
Q

Define SPECI

A

Aviation Selected Special Weather Report 3.1.2

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11
Q

What are the wind shift requirements for the issuance of a SPECI?

A

45 degrees Less than 15 minutes Wind speed greater than 10kts Table 3-1

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12
Q

For a SPECI to be issued the visibility must drop below or increase to what value

A

3 sm 2 sm 1 sm Below the minimums of the lowest IAP 1/2 sm Table 3-1

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13
Q

A SPECI will be issued when a tornado….

A

Is observed Disappears or ends Table 3-1

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14
Q

A SPECI will be issued for a thunderstorm when…

A

Begins, not if one is currently reported Ends Table 3-1

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15
Q

A SPECI will be issued for precip when

A

Hail begins or ends Freezing precipitation begins, ends, or changes intensity Ice pellets begin, end, or change intensity Table 3-1

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16
Q

For a SPECI to be issued the ceiling must drop below or increase to what value…

A

3,000’ 1,500’ 1,000’ 500’ Lowest IAP 200’ Table 3-1

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17
Q

Will an aircraft mishap result in a SPECI?

A

Yes Table 3-1

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18
Q

AUTO

A

Fully automated report with no human intervention or oversight 3.1.3.4

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19
Q

COR

A

Corrected METAR or SPECI 3.1.3.4

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20
Wind gust
Rapid fluctuations in wind speed 10kts or more between peaks and lulls 3.1.3.5.1
21
Wind speed is determined how
Averaging the speed over a 2-minute period 3.1.3.5
22
VRB
Variable Wind speed was 6kts or less
23
00000kts
Calm winds 3.1.3.5.4
24
- METAR
Light Table 3-2
25
+ in METAR
Heavy Table 3-2
26
MI
Shallow Table 3-2
27
PR
Partial Table 3-2
28
V in wind group
Wind varies by 60 degrees or more Wind speed more than 6kts 3.1.3.5.3
29
BC
Patches Table 3-2
30
DR
Low drifting Table 3-2
31
BL
Blowing Table 3-2
32
SH
Showers Table 3-2
33
TS
Thunderstorms Table 3-2
34
FZ
Freezing Table 3-2
35
DZ
Drizzle Table 3-2
36
RA
Rain Table 3-2
37
SN
Snow Table 3-2
38
SG
Snow Grains Table 3-2
39
IC
Ice Crystals Table 3-2
40
PL
Ice Pellets Table 3-2
41
GR
Hail Table 3-2
42
GS
Small Hail Table 3-2
43
UP
Unknown Precipitation Table 3-2
44
BR
Mist Table 3-2
45
FG
Fog Table 3-2
46
FU
Smoke Table 3-2
47
VA
Volcanic Ash Table 3-2
48
DU
Widespread dust Table 3-2
49
SA
Sand Table 3-2
50
HZ
Haze Table 3-2
51
PY
Spray Table 3-2
52
PO
Dust/sand whirls Table 3-2
53
SQ
Squalls Table 3-2
54
FC
Funnel cloud Tornado Water spout Table 3-2
55
SS
Sandstorm Table 3-2
56
DS
Dust storm Table 3-2
57
Vicinity
5-10 sm 3.1.3.8.2
58
When will an obscuration be coded in a METAR
When surface visibility is below 7 miles 3.1.3.8.5
59
When will UP be reported
When an automatic station detects the occurrence of precipitation but the sensor cannot recognize the type 3.1.3.8.4
60
VV
Vertical visibility 8/8 coverage Table 3-3
61
SKC
Clear Used at manual stations when no layers are reported Table 3-3
62
CLR
Clear below 12,000 Automated stations only
63
FEW
Few 1/8-2/8 coverage Table 3-3
64
SCT
Scattered 3/8-4/8 coverage Table 3-3
65
BKN
Broken 5/8-7/8 coverage Table 3-3
66
OVC
Overcast 8/8 coverage
67
Define ceiling
The lowest layer aloft reported as broken or overcast 3.1.3.9
68
CB
Cumulonimbus clouds 3.1.3.9
69
TCU
Tower cumulus 3.1.3.9
70
Define Dew Point
Temperature to which a given parcel of air must be cooled for the air to become fully saturated 3.1.3.10
71
RMK
Remarks 3.1.3.12
72
DSNT
Distant Beyond 10nm Less than 30nm 3.1.3.12
73
Distant remarks are in _____ miles except lighting remarks which are in ______ miles
Statue miles Nautical miles 3.1.3.12
74
AO1
Automated station without a precipitation discriminator 3.1.3.13.3
75
AO2
Automated station with a precipitation discriminator 3.1.3.13.3
76
FROPA
Frontal passage 3.1.3.13.5
77
OCNL lighting
Occasional Less than 1 flash/minute Table 3-6
78
FRQ lighting
Frequent About 1-6 flashes per minute Table 3-6
79
CONS lightning
Continuous More than 6 flashes per minute
80
B or E in METAR remarks
Beginning or ending of weather phenomenon 3.1.3.13.12
81
CBMAM
Cumulonimbus mammatus 3.1.3.13.19.1
82
ACC in METAR
Altocumulus Castellanus 3.1.3.13.19.3
83
SCSL, ACSL, CCSL
Stratocumulus Altocumulus Cirrocumulus 3.1.3.13.19.4
84
PRESRR PRESFR
Pressure rising rapidly Pressure falling rapidly 3.1.3.13.21
85
SNINCR
Snow increasing rapidly First number indicates snow in last hour Second number indicates total snow fall 3.1.3.13.25
86
RVRNO
Runway visual range is missing 3.1.3.14.2.1
87
PWINO
Present weather identifier and the sensor is not operating 3.1.3.14.2.1
88
PNO
Tipping bucket rain gauge and sensor is not operating 3.1.3.14.2.1
89
FZRANO
Freezing rain sensor is not operating 3.1.3.14.2.1
90
TSNO
Lighting detector is not operating 3.1.3.14.2.1
91
VISNO LOC
Secondary visibility sensor not operating 3.1.3.14.2.1
92
CHINO LOC
Secondary ceiling height indicator is not operating 3.1.3.14.2.1
98
$
Maintenance is needed on the system 3.1.3.14.2.2
99
Eroute controllers advise pilots of hazardous weather that may impact operations within ____ of the controller's sector
150nm 1.2.2
100
ATCR and TRACONs may opt to broadcast hazardous weather only when part of the area described is within \_\_\_\_\_\_
50nm 1.2.3
101
An outlook briefing should be requested when a planned departure is how far out?
6 or more hours 1.3.1.3
102
PATWAS
Pilot's automatic telephone weather answering service Appendix B
103
TIBS service hours
24 hrs a day 1.3.4
104
How large of a radius do area briefings cover?
50nm 1.3.4
105
How often is TIBS updated?
As conditions change 1.3.4
106
Where can you find TIBS phone numbers?
AF/D 1.3.4
107
METAR wind True or Magnetic
True 3.1.3.5
108
Prevailing visibility
The greatest distance that can be seen throughout at least half of the horizon circle, not necessarily continuous. 3.1.3.6
109
M1/4SM
Less than 1/4sm visibility 3.1.3.6
110
Manual RVR is not reported below:
600' 3.1.3.7
111
RVR is reported when?
When prevailing visibility is 1sm or less 3.1.3.7
112
Automated stations may report RVR for up to ______ runways
4 3.1.3.7
113
V in RVR report
Variable conditions Included when varies by more than one reportable value
114
Intensity qualifiers are not included with what precipitation phenomena
Ice crystals Hail Blowing dust Blowing Sand Blowing Snow 3.1.3.8.1
115
Are intensity qualifiers included with VC
No 3.1.3.8.2
116
Shallow
The visibility at 6 feet above ground level is greater than or equal to 5/8 SM and the apparent visibility in the fog layer is less than 5/8 SM Table 7-5
117
Patches
Fog patches covering part of the airport. The apparent visibility in the fog patch or bank is less than 5/8 SM, with the foggy patches extending to at least 6 feet above ground level. Table 7-5
118
Maximum number of types of precipitation that may be coded in single group
3 3.1.3.8.4
119
Obscuration
Any phenomenon in the atmosphere other than precipitation reducing visibility 3.1.3.8.5
120
Precipitation
Any of the forms of water particles, whether liquid or solid that falls from the atmosphere and reaches the ground. 3.1.3.8.4
121
How often are Surface Analysis Charts issued?
Every 3 hours
122
How often are Radar Summary charts issued
Hourly
123
What are the three types of configurations within radar summary reports?
Cell LN Area
124
Cell in radar summary report
Single isolated convective echo
125
LN in radar summary report
Echo that: Contains heavy precip Is 30 miles long 4 times longer than width 25% coverage
126
Area in radar summary report
Groups of echoes of similar type not in a line
127
How is coverage denoted in a radar summary report?
Single digit preceding precip type that represents in tenths of coverage
128
R in radar summary report
Rain
129
RW in radar summary report
Rain Shower
130
S in radar summary report
Snow
131
SW in radar summary report
Snow shower
132
T in radar summary report
Thunderstorm
133
- in radar summary report
Light precip
134
+ in radar summary report
Heavy precip
135
++ in radar summary report
Heavy precip
136
X in radar summary report
Extreme precip
137
XX
Extreme precip
138
How is location denoted on a radar summary report?
Two end points denoted by radial and distance and a width followed by the letter W
139
MT in radar summary report
Radar data alone
140
MTS on radar summary report
Satellite and radar data used
141
How is max top denoted on radar summary report?
Three digit number in hundreds of feet with azimuth and range denoting location
142
U in radar summary report altitude section
Echo tops are uniform in height
143
How is cell movement denoted in radar summary report?
4 digit number preceded by letter C First two are direction in true north Second two are speed in knots
144
When will wind be reported in the area forecast?
Surface wind sustained at 20kts or greater Surface gusts are 25kts or greater 7.1.6
145
When will weather phenomenon be included in an area forecast?
If it results in visibilities of 3-5 statue miles 7.1.6

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