What is the purpose of the Remarks column on the 2322?
To record meteorological information of importance to aviation and other users which has not been given previously. Also used to record information that cannot be entered elsewhere. Such as; wind direction variation, wind shear within 1500' above ground, RVR data, or ran out of room in column 32.
How is information entered in column 41
Using abbreviations authorized in MANAB or plain English words shall be used as necessary to amplify or clarify the information. Information not of direct importance to aviation and not ment for transmission shall be enclosed in brackets.
Priority of remarks in column 41
1. General Weather remarks, starting with "OBS TAKEN +tt" then in order of importance (Manobs 10.2.19.1 - 10.2.19.10) Also includes in-the-vicinity phenonena.
4. Hail size
How is RVR data recorded in column 41?
RVR data shall be included in hourly and speci observations. RVR shall be reported for the active, or most aligned to the wind runway(s) when reporting prevailing visibility is 1SM or less and/or RVR value for the designated runway(s) is 6000' or less.
All RVR values shall be representitive of the touchdown zone of the active landing runway(s)
Format for recording RVR in column 41
eg. RVR RWY09/1600FT
If visibility is variable, add a "U" for upward trend or "D" for downward trend. If no distinct change is observed, use "N" on the end
if significantly variable;
If visibility is greater then the max value that can be addressed, "P" shall append the # of feet, eg. P1600FT
If visibilitie is lower then min reportable, "M" shall append. eg. M0600
When shall Contrails be noted in column 41
When they persist for 15 min or more. Rapidly dissapating contrails shall not be reported.
Remark when AC7 building rapidly from SW
AC XTNDG RPDLY FM SW
When ceiling overhead is measures at 400ft, but North of field it is 500ft
CIG 5 N OF FLD
Ceiling Estimated with Ballon
VV is reported as 000, but is measured at 35FT
CIG 35 FT
If visibility in FG is 1/2SM but FG is quickly breaking up and visibility improving quickly.
VIS IMPRVG RPDLY
A tornado (FC+) is observed to the SW and is moving E
TORNADO SW MOVG E
Can a Funnel Cloud be abbreviated (FC) in remarks?
Remark for wind shift
WSHFT tttt (tttt = 4 digit time at which wind shift began)
Remark when wind variable from 180 to 260
Remark for wind shift of threshold of runaway 09
WS RWY 09
Remark for pressure rising rapidly
Remark for Pressure falling rapidly
What do you record when Mountain Wave Clouds are observed?
Mountain or Standing Wave Clouds shall be reported in Remarks whether or not the clouds are predominant. Remarks shall indicate their presence throughout the period they are observed.
eg. ROTOR CLDS NW or RDG LENTICULARS IN LYRS W
When CB's are observed what remarks must be made in column 41?
Where they were observed in relation to the point of observation, and direction they are moving.
eg. CB NE MOVG RPDLY S
When and how is snowfall remarked in column 41?
Newly fallen snow shall be reported in Remarks of an Hourly report if the accumulating depth of the new snow is 1cm or more (rounded) then the last rounded reported depth.
Shall be reported /Sss/ ("S" for snow, "ss" two digit depth in whole cm)
eg. measured snowfall since last report = 0.7cm, in remarks /S01/
ref. W09 pg 23
When and how is Rainfall remarked in column 41?
Newly fallen rain shall be reported in Remarks of an Hourly report if the accumulation of the rain is 10mm or more (rounded to nearest mm) then the last rounded reported accumulation.
Shall be reported /Rrr/ ("R" for rain, "rr" two digit accumulation in mm)
eg. measured accumulation of rain since last report = 9.8mm, in remarks /R10/
ref. W09 pg 25
When Hail is observed, what goes in Remarks?
The average size of the hail shall be estimated and recorded in column 41 in whole mm.
eg. HAIL DIAM 09 MM
If weather obs taken either early or late, what must go in Remarks?
OBS TAKEN + tt (tt = minutes)
minutes are number of minutes either before or after the hour in which the Barometer was read.
eg. Barometer read 18min past the hour;
OBS TAKEN +18