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SPECIAL FEATURES OF THE METEOROLOGICAL SITUATION [SURFACE CENTRES AND FRONTS):
ACTIVE COLD FRONT FROM HUMBER TO CHANNEL ISLES AT 1000 UTC MOVING EAST AT 20 KNOTS TO
LIE NORTHISOUTH ACROSS TRACK ABOUT 40 NM WEST OF AMSTERDAM BY 1900 UTC.
Issued b y . . . . . . . . . . at . . . . . . . . . .U TC on . . . . . . . . . . . .20. . . .b y . . . . . . . . . .F orecaster.
ZONE
UPPER WINDS
(DEGREES TRUE AND KNOTS) FL 240
TEMPERATURES FL 180
(DEGREES CELSIUS) FL 100
SIGNIFICANT WEATHER
AND ASSOCIATED CLOUD
' TROPOPAUSE HEIGHT
' JET STREAM
Notes: 1. Pressure altitude is the height in feet of a level in the standard atmosphere above the datum level corresponding to a
pressure of 1 013.2 hPa.
2. Positive and negative values are indicated by the prefix 'PS" (plus) and 'MS" (minus) respectively.
LONDON 02" E AMSTERDAM
3. Only cloud associated with significant weather is shown. Low stratus and fog, when expected, will be shown for terminal
areas in appropriate aerodrome forecasts.
260140 MS 40
270135 MS 26
280130 MS 12
MODERATE TURBULENCE 180
XXX
4. When a single numerical value of an element is given in a forecast, it is to be interpreted as representing the most
probable mean of a range of values which the element may assume during the period of the forecast.
240160 MS 36
240150 MS 24
250145 MS 09
ISOL THUNDERSTORMS
MODERATE TO SEVERE 240
ICING AND TURBULENCE
Abbreviations: SKC - 0 oktas. FEW - 1 to 2 oktas. SCT - 3 to 4 oktas, BKN - 5 to 7 oktas, OVC - 8 oktas, LYR - Layered,
LOC - Locally, ISOL - Isolated, OCNL - Occasional, FRQ - Frequent. EMBD - Embedded.
APP 1-5
Annex 3 - Meteorological Service for International Air Navigation Appendix I
Model TB. Tabular forecast of upper winds and upper-air temperatures
Example - Spot locations
AT ............. UT
05150 10+03
24 210 30 - 28
18 220 35 - 17
1021025+00
05 180 10 + 10
02 150 15 + 12
24 190 25- 29
24 240 25 - 25
18 250 20 - 13
10 230 10 + 04
05 180 10 + 13
02VRB 05+ 18
24 160 30- 29
24 190 20- 26
18 180 15 - 13
' 10220 10+04
02 150 15 + 16 05 150 10 + 13
02 169 10 + 16 05 240 15 + 12
02230 10 + 17
5"E
Boxes refer to spot winds degrees trueand knots at
intersections of the LATILONGlines covered by the box;
temperatures in degrees Celsius; heights are above MSL
(thousands of feet).
APP 1-6
Model IS. Upper wind and temperature chart for standard isobaric surface
Example 1 - Arrows, feathers and pennants (Mercator projection)
WINMEMPERATURE
FL . . . . . . . . . . . . . .
FIXED TIME PROGNOSTIC CHART
VALID. . . . UTC. . . . 20. .
BASED ON. . UTC DATA ON. . .
Units used: knots; degrees Celsius
Model IS. Upper wind and temperature chart for standard isobaric surface
Example 2 - Arrows, feathers and pennants (Polar stereographic projection)
ISSUED BY WAFC. - . - . . . ..
WlNDlTEMPERATURE
FL . - - - . . . . - - -
FIXED TIME PROGNOSTIC CHART
VALID. . UTC - 20. .
BASED ON. . UTC DATA ONModel
SWH. Significant weather chart (high level)
Example 1 - Mercator projection
or severe turbulence.
:worr:ainu%mght
Model SWH. Significant weather chart (high level)
Example 2 - Polar stereographic projection
SlGWX ABOVE FL 250
Model SWH. Significant weather chart (high level)
Example 3 - Polar stereographic projection (showing the jet stream vertical extent and crossing jet stream depictions)
Model SWM. Significant weather chart (medium level)
ISSUED BY WAFC ...........................
SIGWX FL 100- 250
FIXEDTIME PROGNDSTIC CHART
VALID ......... UTC ......... 20 ......
Symbols Rand CB imply moderate or
severe turbulence, icing and hail.
Units used: knots: altitudes in flight levels.
. . .
Appendix I Annex 3 - Meteorological Service for International Air Navigation
Model SWL. Significant weather chart (low level)
Example 1
APP 1-13 25/11/04
Model SWL. Significant weather chart (low level)
Example 2
ISSUED BY .............................A. T ......... UTC
Notes:
1. ResSure In hPa and speeds hl knm.
2. Vis in m Included I l b s than 5 MO m. M ImpAes vis 2M m or less.
3. m d e h\ hectdeet above MSC XM. - above 10 OW R.
4. Rand CB imply MODISEV Ichg and uilbulence.
5. o q signficant weather and/a- weamer phenomena causblg
WDUily reduction Lwlow 5 OW m Included.
REMARKS:
EAST TO NE GALES SHETLAND TO HEBRIDES - SEVERE MOUNTAIN WAVES NW SCOTLAND -
FOG PATCHES EAST ANGLlA - WDSPR FOG OVER NORTH FRANCE, BELGIUM AND THE NETHERLANDS
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