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SCAN > Aviation Weather Services > Flashcards

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
Q

Wind gust

A

Rapid fluctuations in wind speed 10kts or more between peaks and lulls 3.1.3.5.1

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21
Q

Wind speed is determined how

A

Averaging the speed over a 2-minute period 3.1.3.5

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22
Q

VRB

A

Variable Wind speed was 6kts or less

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23
Q

00000kts

A

Calm winds 3.1.3.5.4

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24
Q
  • METAR
A

Light Table 3-2

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25
Q

+ in METAR

A

Heavy Table 3-2

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26
Q

MI

A

Shallow Table 3-2

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27
Q

PR

A

Partial Table 3-2

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28
Q

V in wind group

A

Wind varies by 60 degrees or more Wind speed more than 6kts 3.1.3.5.3

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29
Q

BC

A

Patches Table 3-2

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30
Q

DR

A

Low drifting Table 3-2

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31
Q

BL

A

Blowing Table 3-2

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32
Q

SH

A

Showers Table 3-2

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33
Q

TS

A

Thunderstorms Table 3-2

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34
Q

FZ

A

Freezing Table 3-2

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35
Q

DZ

A

Drizzle Table 3-2

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36
Q

RA

A

Rain Table 3-2

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37
Q

SN

A

Snow Table 3-2

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38
Q

SG

A

Snow Grains Table 3-2

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39
Q

IC

A

Ice Crystals Table 3-2

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40
Q

PL

A

Ice Pellets Table 3-2

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41
Q

GR

A

Hail Table 3-2

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42
Q

GS

A

Small Hail Table 3-2

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43
Q

UP

A

Unknown Precipitation Table 3-2

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44
Q

BR

A

Mist Table 3-2

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45
Q

FG

A

Fog Table 3-2

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46
Q

FU

A

Smoke Table 3-2

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47
Q

VA

A

Volcanic Ash Table 3-2

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48
Q

DU

A

Widespread dust Table 3-2

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49
Q

SA

A

Sand Table 3-2

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50
Q

HZ

A

Haze Table 3-2

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51
Q

PY

A

Spray Table 3-2

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52
Q

PO

A

Dust/sand whirls Table 3-2

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53
Q

SQ

A

Squalls Table 3-2

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54
Q

FC

A

Funnel cloud Tornado Water spout Table 3-2

55
Q

SS

A

Sandstorm Table 3-2

56
Q

DS

A

Dust storm Table 3-2

57
Q

Vicinity

A

5-10 sm 3.1.3.8.2

58
Q

When will an obscuration be coded in a METAR

A

When surface visibility is below 7 miles 3.1.3.8.5

59
Q

When will UP be reported

A

When an automatic station detects the occurrence of precipitation but the sensor cannot recognize the type 3.1.3.8.4

60
Q

VV

A

Vertical visibility 8/8 coverage Table 3-3

61
Q

SKC

A

Clear Used at manual stations when no layers are reported Table 3-3

62
Q

CLR

A

Clear below 12,000 Automated stations only

63
Q

FEW

A

Few 1/8-2/8 coverage Table 3-3

64
Q

SCT

A

Scattered 3/8-4/8 coverage Table 3-3

65
Q

BKN

A

Broken 5/8-7/8 coverage Table 3-3

66
Q

OVC

A

Overcast 8/8 coverage

67
Q

Define ceiling

A

The lowest layer aloft reported as broken or overcast 3.1.3.9

68
Q

CB

A

Cumulonimbus clouds 3.1.3.9

69
Q

TCU

A

Tower cumulus 3.1.3.9

70
Q

Define Dew Point

A

Temperature to which a given parcel of air must be cooled for the air to become fully saturated 3.1.3.10

71
Q

RMK

A

Remarks 3.1.3.12

72
Q

DSNT

A

Distant Beyond 10nm Less than 30nm 3.1.3.12

73
Q

Distant remarks are in _____ miles except lighting remarks which are in ______ miles

A

Statue miles Nautical miles 3.1.3.12

74
Q

AO1

A

Automated station without a precipitation discriminator 3.1.3.13.3

75
Q

AO2

A

Automated station with a precipitation discriminator 3.1.3.13.3

76
Q

FROPA

A

Frontal passage 3.1.3.13.5

77
Q

OCNL lighting

A

Occasional Less than 1 flash/minute Table 3-6

78
Q

FRQ lighting

A

Frequent About 1-6 flashes per minute Table 3-6

79
Q

CONS lightning

A

Continuous More than 6 flashes per minute

80
Q

B or E in METAR remarks

A

Beginning or ending of weather phenomenon 3.1.3.13.12

81
Q

CBMAM

A

Cumulonimbus mammatus 3.1.3.13.19.1

82
Q

ACC in METAR

A

Altocumulus Castellanus 3.1.3.13.19.3

83
Q

SCSL, ACSL, CCSL

A

Stratocumulus Altocumulus Cirrocumulus 3.1.3.13.19.4

84
Q

PRESRR PRESFR

A

Pressure rising rapidly Pressure falling rapidly 3.1.3.13.21

85
Q

SNINCR

A

Snow increasing rapidly First number indicates snow in last hour Second number indicates total snow fall 3.1.3.13.25

86
Q

RVRNO

A

Runway visual range is missing 3.1.3.14.2.1

87
Q

PWINO

A

Present weather identifier and the sensor is not operating 3.1.3.14.2.1

88
Q

PNO

A

Tipping bucket rain gauge and sensor is not operating 3.1.3.14.2.1

89
Q

FZRANO

A

Freezing rain sensor is not operating 3.1.3.14.2.1

90
Q

TSNO

A

Lighting detector is not operating 3.1.3.14.2.1

91
Q

VISNO LOC

A

Secondary visibility sensor not operating 3.1.3.14.2.1

92
Q

CHINO LOC

A

Secondary ceiling height indicator is not operating 3.1.3.14.2.1

98
Q

$

A

Maintenance is needed on the system 3.1.3.14.2.2

99
Q

Eroute controllers advise pilots of hazardous weather that may impact operations within ____ of the controller’s sector

A

150nm 1.2.2

100
Q

ATCR and TRACONs may opt to broadcast hazardous weather only when part of the area described is within ______

A

50nm 1.2.3

101
Q

An outlook briefing should be requested when a planned departure is how far out?

A

6 or more hours 1.3.1.3

102
Q

PATWAS

A

Pilot’s automatic telephone weather answering service Appendix B

103
Q

TIBS service hours

A

24 hrs a day 1.3.4

104
Q

How large of a radius do area briefings cover?

A

50nm 1.3.4

105
Q

How often is TIBS updated?

A

As conditions change 1.3.4

106
Q

Where can you find TIBS phone numbers?

A

AF/D 1.3.4

107
Q

METAR wind True or Magnetic

A

True 3.1.3.5

108
Q

Prevailing visibility

A

The greatest distance that can be seen throughout at least half of the horizon circle, not necessarily continuous. 3.1.3.6

109
Q

M1/4SM

A

Less than 1/4sm visibility 3.1.3.6

110
Q

Manual RVR is not reported below:

A

600’ 3.1.3.7

111
Q

RVR is reported when?

A

When prevailing visibility is 1sm or less 3.1.3.7

112
Q

Automated stations may report RVR for up to ______ runways

A

4 3.1.3.7

113
Q

V in RVR report

A

Variable conditions Included when varies by more than one reportable value

114
Q

Intensity qualifiers are not included with what precipitation phenomena

A

Ice crystals Hail Blowing dust Blowing Sand Blowing Snow 3.1.3.8.1

115
Q

Are intensity qualifiers included with VC

A

No 3.1.3.8.2

116
Q

Shallow

A

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
Q

Patches

A

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
Q

Maximum number of types of precipitation that may be coded in single group

A

3 3.1.3.8.4

119
Q

Obscuration

A

Any phenomenon in the atmosphere other than precipitation reducing visibility 3.1.3.8.5

120
Q

Precipitation

A

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
Q

How often are Surface Analysis Charts issued?

A

Every 3 hours

122
Q

How often are Radar Summary charts issued

A

Hourly

123
Q

What are the three types of configurations within radar summary reports?

A

Cell LN Area

124
Q

Cell in radar summary report

A

Single isolated convective echo

125
Q

LN in radar summary report

A

Echo that: Contains heavy precip Is 30 miles long 4 times longer than width 25% coverage

126
Q

Area in radar summary report

A

Groups of echoes of similar type not in a line

127
Q

How is coverage denoted in a radar summary report?

A

Single digit preceding precip type that represents in tenths of coverage

128
Q

R in radar summary report

A

Rain

129
Q

RW in radar summary report

A

Rain Shower

130
Q

S in radar summary report

A

Snow

131
Q

SW in radar summary report

A

Snow shower

132
Q

T in radar summary report

A

Thunderstorm

133
Q
  • in radar summary report
A

Light precip

134
Q

+ in radar summary report

A

Heavy precip

135
Q

++ in radar summary report

A

Heavy precip

136
Q

X in radar summary report

A

Extreme precip

137
Q

XX

A

Extreme precip

138
Q

How is location denoted on a radar summary report?

A

Two end points denoted by radial and distance and a width followed by the letter W

139
Q

MT in radar summary report

A

Radar data alone

140
Q

MTS on radar summary report

A

Satellite and radar data used

141
Q

How is max top denoted on radar summary report?

A

Three digit number in hundreds of feet with azimuth and range denoting location

142
Q

U in radar summary report altitude section

A

Echo tops are uniform in height

143
Q

How is cell movement denoted in radar summary report?

A

4 digit number preceded by letter C First two are direction in true north Second two are speed in knots

144
Q

When will wind be reported in the area forecast?

A

Surface wind sustained at 20kts or greater Surface gusts are 25kts or greater 7.1.6

145
Q

When will weather phenomenon be included in an area forecast?

A

If it results in visibilities of 3-5 statue miles 7.1.6

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