TAF Daily

Puzzle #51 was CYYT (St. John's International Airport).

TAF CYYT 111740Z 1118/1218 11008KT P6SM BKN060 BECMG 1118/1120 SCT060 FM112300 03005KT P6SM SCT004 BECMG 1123/1124 6SM BR BKN004 FM120100 01010KT 3/4SM BR BKN004 PROB30 1203/1210 1/4SM FG VV002 FM121400 01015KT 1SM BR BKN004 RMK NXT FCST BY 120000Z

Airport info for CYYT →

How it scored

TAF
Terminal aerodrome forecast
CYYT
Station CYYT
111740Z
Issued on the 11 at 1740 Zulu (UTC)
1118/1218
Valid from the 11 at 1800 Zulu to the 12 at 1800 Zulu
11008KT
Wind from 110° at 8 knots
P6SM
Visibility greater than 6 statute miles
BKN060
Broken clouds at 6,000 ft
BECMG 1118/1120
Becoming, gradually over the 11 at 1800 Zulu to the 11 at 2000 Zulu
SCT060
Scattered clouds at 6,000 ft
FM112300
Rapid change from the 11 at 2300 Zulu
03005KT
Wind from 30° at 5 knots
P6SM
Visibility greater than 6 statute miles
SCT004
Scattered clouds at 400 ft
BECMG 1123/1124
Becoming, gradually over the 11 at 2300 Zulu to the 11 at 2400 Zulu
6SM
Visibility 6 statute miles
BR
Mist
BKN004
Broken clouds at 400 ft
FM120100
Rapid change from the 12 at 0100 Zulu
01010KT
Wind from 10° at 10 knots
3/4SM
Visibility 3/4 statute miles
BR
Mist
BKN004
Broken clouds at 400 ft
PROB30 1203/1210
30% probability of temporary conditions, the 12 at 0300 Zulu to the 12 at 1000 Zulu
1/4SM
Visibility 1/4 statute miles
FG
Fog
VV002
Vertical visibility 200 ft (sky obscured)
FM121400
Rapid change from the 12 at 1400 Zulu
01015KT
Wind from 10° at 15 knots
1SM
Visibility 1 statute miles
BR
Mist
BKN004
Broken clouds at 400 ft
RMK NXT FCST BY 120000Z
Remarks (not decoded): NXT FCST BY 120000Z

Also on the record

Over what UTC (Zulu) period is this forecast valid?
day 11 at 18:00Z to day 12 at 18:00Z
What is the flight category of the initial (base) forecast period?
VFR
Across the whole forecast, how does the ceiling change?
The ceiling lowers (deteriorates) later in the forecast.
Across the whole forecast, what is the worst (most restrictive) flight category at any point?
LIFR
In this forecast, what does the group beginning "FM120100" indicate?
A rapid, complete change to new prevailing conditions from that time onward.

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