I previously posted that the training guide was CORRECTED. you are quoting from the incorrect instructions.
but...if you want to go by 7900.5D
14.18.b.(3)...phenomena between 5-10 miles MUST be reported as in the vicinity (VC)the only correct remark is the LTG remark
CB remarks example: CB up to 10 miles reportd as CB W MOV E. Using 7900.5B's own instructions, the correct remarks would be a CB 0-5 miles west of the station...CB W MOV E. a CB 5-10 miles west of the station...CB VC W MOV E
this also applies to all the other sig cloud remarks as well
Thats true. Phenomena as defined in Chapter 10 Weather Phenomena
Here is how we are instructed to code and report SIG CLDS from Chapter 11 Sky Condition:
11.37. Significant Clouds. Observers must be alert for the occurrence of cumulonimbus,
towering cumulus, altocumulus castellanus, standing lenticular, or rotor clouds and report them
whenever they occur. These clouds may be reported by entering a remark in METAR and
SPECI observations. The remark must contain the identification of the cloud, and (insofar as
known) the direction and distance from the station and, for cumulonimbus clouds, the direction
of movement. See Paragraph 14.38, Significant Cloud Type [PLAIN LANGUAGE], for
detailed instructions on coding these remarks. Cumulonimbus (CB) or towering cumulus
(TCU) must be appended to the appropriate layer in the body of the observation.
When TCU or
CB is appended to the layer report accompanied by the remark, "TCU NW" or "CB NW MOV
E”, it is implied that the TCU or CB is associated with the layer and within 10 SM. When TCU
or CB is outside 10 SM, a DSNT remark is appropriate, for example, "TCU DSNT NW". (In
this case, TCU or CB would not be appended to the layer in the body of the METAR.)
Also,
see Paragraph 14.38, Significant Cloud Type [PLAIN LANGUAGE].NOTENot
required by LAWRS, may be reported if deemed operationally significant by the controller.
Here's the plain language coding the above directs you to:
14.38. Significant Cloud Type [PLAIN LANGUAGE]. Cumulonimbus or Cumulonimbus
Mammatus (CB or CBMAM_LOC_ (MOV_DIR). Cumulonimbus (CB) or cumulonimbus
mammatus (CBMAM), as appropriate, (for which no thunderstorm is being reported) is coded
in the above format, where CB or CBMAM is the cloud type, LOC is the direction from the
station, and MOV_DIR is the movement with direction (if known). The cloud type, location,
movement, and direction entries must be separated from each other with a space.
EXAMPLESCB
up to 10 SM west of the point of observation, moving toward the east: CB W MOV E
Cloud is more than 10 SM away: CB DSNT W
a. Towering Cumulus (TCU_[DIR]). Towering cumulus (TCU) clouds are coded in the
format, TCU_[DIR], where TCU is the cloud type and DIR is the direction from the point of
observation. The cloud type and direction entries must be separated by a space.
EXAMPLETowering
cumulus clouds up to 10 SM west of the point of observation: TCU W
b. Altocumulus Castellanus (ACC_[DIR]). Altocumulus Castellanus (ACC) is coded in
the format, ACC_[DIR], where ACC is the cloud type and DIR is the direction from the point of
observation. The cloud type and direction entries must be separated by a space.
EXAMPLEAltocumulus
castellanus up to 10 statute miles northwest of the point of observation: ACC NW
c. Standing Lenticular or Rotor Clouds (CLD_[DIR]). Stratocumulus standing
lenticular (SCSL), altocumulus standing lenticular (ACSL), or cirrocumulus standing lenticular
(CCSL), or rotor clouds are coded in the format, CLD_[DIR], where CLD is the cloud type and
DIR is the direction from the point of observation. The cloud type and direction entries must be
separated by a space.
EXAMPLESAltocumulus
standing lenticular clouds observed southwest through west of the point of observation:
ACSL SW-W
Apparent rotor cloud northeast of the point of observation: APRNT ROTOR CLD NE
Cirrocumulus standing lenticular clouds south of the point of observation: CCSL S
