SU 9 Aviation weather services Flashcards
AIRMETs are issued on a schedule basis every
six hours
SIGMETs are issued as a warning of weather conditions potentially hazardous
to all aircraft
Consider this AIRMET which includes your route of flight:
DFWS WA 211445 AIRMET IFR… OK TX FROM END TO TXK TO HOU TO LBB TO END CIG BELOW 010. CONDS ENDH 15-18z
This indicates
the area will have low ceilings before 15Z
SIGMETs are issued as a warning of weather conditions potentially hazardous
to all aircraft regardless of size or operating environment
The reporting station originating this Aviation Routine Weather Report has a field elevation of 620 feet. If the reported sky cover is one continuous layer, what is its thickness (tops of OVC are reported at 6,500 feet)?
METAR KMDW 121856Z AUTO 32005KT 1 1/2 sm +RA BR OVC007 17/16 A2980
5,180 feet
The station originating the following weather report has a field elevation of 1,300 feet MSL. From the bottom of the overcast cloud layer, what is its thickness (tops of OVC are reported at 3,800 feet)?
SPECI KOKC 2228Z 28024G36KT 3/4SM BKN008
OVC020 28/23 A3000
500 feet
Interpret the remarks section of METAR surface report for KBNA
Rain ended 42 minutes past the hour, snow began 42 minutes past the hour
A ceiling is defined as the height of the
lowest layer of clouds or obscuring phenomena aloft that is reported as broken or overcast
What significant sky conditions= is reported in this METAR observation?
Sky is obscured with vertical visibility of 800 feet
What is the thickness of the cloud layer given a field elevation of 1,500 feet MSL with tops of the overcast at 7,000 feet MSL?
METAR KHOB 151250Z 17006KT 4SM OVC010 13/11 A2998
4,500 feet
Interpret this PIREP MRB UA/OV MRB/TM 1430/FL 060/TP C182/SK BKN BL /WX RA/TB MDT
At 6,000 feet; between layers; moderate turbulence; moderate rain
Which response most closely interprets the following PIREP
UA/OV OKC 063064/TM 1522/FL080/TP C172/TA04 /WV245040/TB LGT/RM IN CLR
64 nautical miles on the 63 degree radial from Oklahoma City VOR at 1522 UTC, flight level 8,000 feet. Type of aircraft is a Cessna 172
What is the base of the ceiling in the following pilot report?
KMOB UA/ OV APE230010/TM 1515/FL085/TP BE20/SK BKN065/WX FV03SM HZ FU/TA 20/TB LGT
There is a broken layer at 6,500 feet
What is indicated by the following report?
TYR UUA/OV TYR180015/TM 1757/FL310/TP B737/TB MOD-SEV CAT 350-390
An urgent pilot report for moderate to severe clean air turbulence
Use the TAAF to determine the wind shear forecast
TAF
KCVG 231051Z 2311212 12012KT 4SM -RA BR OVC008 WSA005/27050KT TEMPO 1719 1/2sm
-RA FG
FM1930 09012KT 1SM -DZ BR VV003
Wind shear at 500 feet AGL from 270degrees at 50KT
What is the forecast wind at 1800z in the following TAF?
KMEM 091740z 1818 00000KT 1/2SM RAFG OVC005
Calm
When the visibility is greater than 6 SM on a TAF, it is
expressed as P6SM
Which weather product is a concise statement of the expected weather for an airport’s runway complex?
Terminal Aerodrome Forecast (TAF)
A “VRB” wind entry in a Terminal Aerodrome Forecast (TAF) will be indicated when the wind is
6 knots or less
The body of a Terminal Aerodrome Forecast (TAF) covers a geographical proximity within a
5 statue mile radius from the center of an airport runway complex
Use the following TAF to determine the wind shear forecast
KOKC 051130Z 051212 14008KT 5SM BR BKN030 TEMPO 1316 1 1/2SM BR
FM1600 16010KT P6SM SKC
FM2224 20013G20KT 4SM SHRA OVC020
PROB30 0006 2SM TSRA OVC008CB
WS010/18040KT
FM0608 21015KT P6SM NSW SCT040
Wind shear at 1,000 feet, wind from the south at 40KTS
In the following METAR/TAR for HOU, what is the ceiling and visibility forecast on the 7th day of the month at 0600Z?
KHOU 061734Z 0618/0718 16014G22 P6SM
VCSH BKN018 BKN035
FM070100 17010KT P6SM BKN015 OVC025
FM070500 17008KT 4SM BR SCT008 OVC012
FM071000 18005KT 3SM BR OVC007
FM071500 23008KT 5SM BR VCSH SCT008 OVC015
4 statue miles visibility and an overcast ceiling at 1,200 feet AGL
A station is forecasting wind and temperature aloft at FL 390 to be 300 degrees at 200 knots; temperature -54 degrees Celsius. How would this data be encoded in the FB?
809954
What wind direction and speed is represented by the entry 9900+00 for 9,000 feet, on a Wind and temperature Aloft Forecast (FB)
Light and variable; less than 5 knots
When is the temperature at one of the forecast altitudes omitted at a specific location or station in the wind and temperature Aloft forecast (FB)
For the 3,000-foot altitude (level) or when the level is within 2,500 feet station elevation
How much colder than standard temperature is the forecast temperature at 9,000 feet, as indicated in the following excerpt from the wind temperature aloft forecast?
FT 6000 9000
0737-04 1043-10
7 degrees Celsius