PREFERENCES PANEL
Station plots tab

Also see the special topics on Surface plot models, Upper air plot models, and Station filtering.  Station filtering has been moved to the Control Panel in Digital Atmosphere versions after 2002.

 

BASIC SELECTIONS

 

STATION PLOT UNITS

 

SURFACE PLOT MODEL

These settings only apply when the active level is the surface level and Overlay, Data is selected.

 

UPPER PLOT MODEL

These settings only apply when the active level is an upper level and plots are produced using Data > Plot.

PLOT MODEL CONFIGURATIONS

For both surface and upper air plots, a "grid" of dropdown boxes are set up in a way that represents the various data positions around a given station plot. You can use these dropdown boxes to adjust the kinds of data that are plotted in the different positions.  Listed below are the different types of data that are valid.

 

Table of valid data plot elementsUnits marked "C or F" or "ft or m" or "sm or m" are in metric or English according to File > Preferences > Station Plots > Station Plot Units unless otherwise specified here.

Blank) Nothing will be plotted in this space
TEMP Air temperature in whole degrees (C or F)

TEMP(10) Air temperature in tenths (C or F)

DWPT Dewpoint in whole degrees (C or F)

DWPT(10) Dewpoint in tenths (C or F)

GUST Wind gust (kt)

RH Relative humidity (%)

MXR Mixing ratio (g/kg)

THETA Potential temperature (deg K)

THETAE Equivalent potential temperature (theta-e) (deg K)

WINDCHILL Wind chill

HEATINDEX Heat index

SLP Sea level pressure (mb) (plots tens, units, and tenths)

ALSTG Altimeter setting (in Hg) (plots units, tenths, and hundredths)

WX Pictogram of current weather type

VIS Prevailing visibility (sm or m)

ELEV Elevation (ft or m)

CIG Ceiling (lowest layer occupying more than half of sky) (hundreds of feet)

OKTAS Cloud cover in oktas (eighths)

ID(ICAO) Station identifier (4-letter ICAO)

ID(WMO) Station identifier (5-digit WMO)

PCP01 Precipitation during past 1 hour

PCP06 Precipitation during past 6 hours

PCP12 Precipitation during past 12 hours

PCP18 Precipitation during past 18 hours

PCP24 Precipitation during past 24 hours

PTEND Pictogram of pressure tendency during past 3 hours

CLD/L Pictogram of low cloud type

CLD/M Pictogram of middle cloud type

CLD/H Pictogram of high cloud type

CLDHGT Cloud height code (synoptic only) (see chart below)

CLDAMT Cloud amount code (synoptic only) (see chart below)

SHIPDIR Pictogram of direction of ship movement

SHIPSPD Speed of ship movement (kt)

SEATEMP Sea-surface temperature (C or F)

TEMPTYPE Type of temperature measurement device

WAVEPD Period of ocean waves (sec)

WAVEHGT Height of ocean waves (ft or m)

SEAINSTHGT Instrument-measured height of ocean waves (ft or m)

WINDPD Ocean wind wave period (sec)

WINDHGT Ocean wind wave height (ft or m)

SWELL1DIR Direction of primary ocean swells (deg)

SWELL2DIR Direction of secondary ocean swells (deg)

SWELL1PD Primary ocean swell period (sec)

SWELL1HGT Primary ocean swell height (ft or m)

SWELL2PD Secondary ocean swell period (sec)

SWELL2HGT Secondary ocean swell height (ft or m)

MINTEMP Minimum temperature (C or F)

MAXTEMP Maximum temperature (C or F)

GRNDSTATE Ground state code (see below)

 

INTERPRETING GROUND STATE CODES (GRNDSTATE)

0 Surface of ground dry (without cracks and no appreciable amount of dust or loose sand)
1 Surface of ground moist

2 Surface of ground wet
3 Flooded
4 Surface of ground frozen

5 Glaze on ground

6 Loose dry dust or sand not covering ground completely

7 Thin cover of loose dry dust or sand covering ground completely

8 Moderate or thick cover of loose dry dust or sand covering ground completely

9 Extremely dry with cracks

10 Ground predominantly covered by ice

11 Compact or wet snow (with or without ice) covering less than half of ground

12 Compact or wet snow (with or without ice) covering half to less than entire ground

13 Even layer of compact or wet snow covering ground completely

14 Uneven layer of compact or wet snow covering ground completely

15 Loose dry snow covering less than half of ground

16 Loose dry snow covering at least half of ground but ground not completely covered

17 Even layer of loose dry snow covering ground completely

18 Uneven layer of loose dry snow covering ground completely

19 Snow covering ground completely; deep drifts

 

INTERPRETING SYNOPTIC CLOUD AMOUNT CODES (CLDAMT)

This category is defined as Nh; the amount of all the low cloud present, or, if no low cloud is present, the amount of all the middle clouds present. The figure is always in oktas (eighths). 9 is reserved for sky obscured by fog and/or other meteorological phenomena, and / is reserved for cloud cover being indiscernable for reasons other than fog or other meteorological phenomena, or observation is not made

 

INTERPRETING SYNOPTIC CLOUD HEIGHT CODES (CLDHGT)

This category is defined as "h, which is reserved for the height of the surface of the base of the lowest cloud seen. They are as follows (below). If the total sky cover is greater than 4/8ths, this figure is also transposed into the CIG slot, where they are plotted as "L" ("low cloud") followed by a loose translation of the table below in hundreds of feet. This "L" differentiates it from true ceilings where "C", "E", or "M" is prefixed.

0 0 to 50 m
1   50 to 100 m

2   100 to 200 m

3   200 to 300 m

4   300 to 600 m

5   600 to 1000 m

6   1000 to 1500 m

7   1500 to 2000 m

8   2000 to 2500 m

9   2500 m or more, or no clouds

/   Height of base of cloud not known, or base of clouds at a level lower and tops at a level higher than that of the station