GEMPAK Manual | Programs | Parameters

     SFPARM

     SFPARM is a list of surface parameters to be used in a surface 
     program.  

     The four-character parameter names must be separated by semicolons.  
     For example:

		SFPARM = TMPF;DWPF;WTHR

     If a parameter is not present in a data set, the program will 
     attempt to derive it from those parameters which are present.  
     For example, relative humidity can be computed from the temperature 
     and dewpoint temperature.  Note that STHA, STHE, and SMXR are 
     computed from PALT.
 
     In plotting programs, the position of the parameter determines
     where it will appear with respect to the station location.
     The first position is centered on the station.  The other
     positions are shown below:

		18	14	8	16	22
		19	2	10	4	23 
		12	3	1	5	13
		20	6	11	7	24
		21	15	9	17	25

     In the example above, WTHR is plotted in position 3.
  
     Functions can be used to modify/qualify the output parameters.  
     These functions must follow the parameter name and are applied in 
     the order given; however, arithmetic operators must precede the 
     other operators.  The function symbols must precede the qualifying 
     value and are defined as follows:

	*	multiply		=	equal to
	/	divide    		$	direction
	+	add      		<	less than or equal to
	-	subtract		>	greater than or equal to

     In the case of weather symbols,  the size, line width and other 
     information needed to draw the symbol may be specified following a 
     colon after the symbol name and after the function specifications 
     if any exist.  The drawing attributes are separated by colons.  For 
     all the symbols, the information is entered as:size:width;for arrows
     and barbs the information is entered as :size:width:type:headsiz, 
     where the headsiz applies only to arrows.  The type is a three-digit
     number, ABC, interpreted digit by digit as follows:

            A                       B                      C
        1 = plot calm wind   1 = start at stn        1 = not filled
        2 = ignore calm wind 2 = center at stn       2 = filled
                             3 = start on sky symbol 3 = not filled with box
                                                     4 = filled with box

     Calm winds are plotted as a circle or an arrowhead for barbs and
     arrows, respectively.  Arrowheads and 50-unit barb flags are filled
     if C=2 or 4. A box is plotted with background color if C = 3 or 4.
     For example, if TYPE=132, a barb will be plotted as a circle if the 
     wind is calm; it will begin on the edge of the cloud cover symbol, 
     and 50-unit flags will be filled.  The default is 111 unless sky 
     symbols are being plotted in which case it is 131.

     The text size and line width can also be specified for plotting numerical 
     data such as temperature and dewpoint.  These follow the parameter name,
     or condition, delimited by colons.  For example, TMPF:2.5:3 , would 
     cause temperatures to be plotted with a text size of 2.5 and a 
     line width of 3.  Text sizes that are positive cause the data to be 
     plotted at the location they would appear if they were being plotted
     with the largest specified text size (ie. farther from the center of 
     the station model than they would normally appear).  Text sizes that are
     negative cause the offsets from the center of the station model to be
     computed based on the specified text size.  NOTE:  A large range of 
     negative text sizes may result in some degree of overplotting.
     When using hardware fonts, text sizes may be named sizes.  For example,
     tiny, SMALL, m, -m, -LARGE, etc, are all valid specifications.
     If no text size is provided for a particular data type, that data will
     be plotted with the default text size specified in the TEXT parameter.

     For all symbols ( weather, cloud, pressure tendency, sky cover, past
     weather, icing, combination, etc. ) and wind barbs and arrows, the area
     immediately surrounding the symbol may be blanked out.  The resulting
     effect allows the object to be more easily identified.  This capability
     may be invoked by adding the additional blank-out width (*100) to the 
     object width.  For example, to blank-out an extra 8 width units
     around the weather symbols of size 2 and width 3, specify the SFPARM
     as WSYM:2:803.

     A special value of M may be used for the = function to denote a 
     missing value, so that values will be plotted only when a specific
     parameter is missing.  For example, to plot an X when the visibility
     is missing, specify SFPARM=MARK:16;VSBY=M.

     Aliases are available to make it easier for the user to plot typical
     surface data by using pre-set parameters and colors.  To use an alias, 
     enter the alias name for SFPARM and leave COLORS blank.  If the user
     does not leave COLORS blank, the selected colors will be used instead
     of the pre-set alias colors.

     See PRMLST.TBL for a list of current aliases for surface data.

     The GEMPAK surface parameters and the corresponding four-character 
     abbreviations are:


		TEMPERATURE

	TMPC - Temperature in Celsius
	TMPF - Temperature in Fahrenheit
	TMPK - Temperature in Kelvin
	STHA - Surface potential temperature in Kelvin 
	STHK - Surface potential temperature in Kelvin
	STHC - Surface potential temperature in Celsius
	STHE - Surface equivalent potential temperature in Kelvin
	STHS - Surface saturation equiv. pot. temp. in Kelvin
	TVRC - Virtual temperature in Celsius
	TVRF - Virtual temperature in Fahrenheit
	TVRK - Virtual temperature in Kelvin
	THTV - Virtual potential temperature in Kelvin
	TDXC - Maximum 24-hour temperature in Celsius
	TDNC - Minimum 24-hour temperature in Celsius
	TDXF - Maximum 24-hour temperature in Fahrenheit
	TDNF - Minimum 24-hour temperature in Fahrenheit
	T6XC - Maximum 6-hour temperature in Celsius
	T6NC - Minimum 6-hour temperature in Celsius
	T6XF - Maximum 6-hour temperature in Fahrenheit
	T6NF - Minimum 6-hour temperature in Fahrenheit
	DMAX - Daily weather map maximum temperature in Fahrenheit
	DMIN - Daily weather map minimum temperature in Fahrenheit
	SSTC - Sea surface temperature in Celsius
	SSTF - Sea surface temperature in Fahrenheit
	LTMP - Temp. in Celsius of surface air lifted to 500 or !x mb


		MOISTURE 

	DWPC - Dewpoint in Celsius
	DWPF - Dewpoint in Fahrenheit
	DWPK - Dewpoint in Kelvin
	DPDC - Dewpoint depression Celsius
	DPDF - Dewpoint depression Fahrenheit
	DPDK - Dewpoint depression Kelvin
	SMXR - Surface mixing ratio in g/kg
	SMXS - Surface saturated mixing ratio in g/kg
	RELH - Relative humidity in percent
	TMWK - Wet bulb temperature Kelvin
	TMWC - Wet bulb temperature Celsius
	TMWF - Wet bulb temperature Fahrenheit
	VAPR - Vapor pressure in millibars
	VAPS - Saturation vapor pressure in millibars

		PRESSURE AND ALTIMETER

	PRES - Station pressure in millibars
	PMSL - Mean sea level pressure in millibars
	PALT - Pressure in millibars from altimeter
	ALTI - Altimeter setting in inches of mercury
	ALTM - Altimeter setting converted to millibars
	SALT - Abbreviated altimeter in millibars
	SMSL - Abbreviated mean sea level pressure
	SALI - Abbreviated ALTI
	RMSL - First 3 digits left of decimal of PMSL * 10
	RSLI - First 3 digits left of decimal of ALTI * 100
	RSLT - First 3 digits left of decimal of ALTM * 10
	PTND - Complete pressure tendency with symbol
	PTSY - Pressure tendency symbol only
	P03C - Pressure change over 3 hours
	P03D - Pressure tendency and change group, appp
	P24C - Pressure change over 24 hours
	ZMSL - Estimated height at PMSL
	Z000 - Estimated height at 1000 mb
	Z850 - Estimated height at 850 mb
	Z800 - Estimated height at 800 mb
	PANY - Returns PMSL, if avaliable, if not, returns ALTM 
	RANY - Computes the 3 digit display of pressure
	SANY - Creates a 3 character string from integral part 
		of PMSL or ALTM

		WIND                            

	ARRW - Wind arrow (m/s)
	ARRM - Wind arrow (m/s)
	ARRK - Wind arrow (knots)
	BARB - Wind barb (m/s)
	BRBM - Wind barb (m/s)
	BRBK - Wind barb (knots)
	BRBS - Wind barb (mi/hr)
	DARR - Wind arrows of uniform length
	UWND - U component of the wind in meters/second
	VWND - V component of the wind in meters/second
	UKNT - U component of the wind in knots
	VKNT - V component of the wind in knots
	DRCT - Wind direction in degrees
	SPED - Wind speed in meters/second
	SKNT - Wind speed in knots
	SMPH - Wind speed in miles/hour
	PSPD - Packed speed and direction (ddfff) in meters/second
	PKNT - Packed speed and direction (ddfff) in knots
	GUST - Wind gusts in knots
	GUMS - Wind gusts in meters/second
	PWDR - Peak 5-second wind direction in degrees
	PWSP - Peak 5-second wind speed in meters/sec
	PWHR - Hour of 5-second peak wind
	PWMN - Minutes of 5-second peak wind

		CLOUD                                    

 	For the following parameters, the character x may be
 	replaced by L, M, or H, indicating low, middle or high
 	clouds.  The character T indicates the value of the parameter
 	at the level of maximum cloud coverage.

	xCLD - Character cloud coverage
	TCLD - Character maximum cloud coverage 
	xCLO - Fractional cloud coverage 
	TCLO - Fractional maximum cloud coverage 
	CLCx - Numeric cloud coverage
	CLCT - Numeric maximum cloud cover
	CLDS - Combined cloud coverage from three levels
	CMBC - Numeric combined cloud coverage from three levels
	CLHx - Cloud height in hundreds of feet
	CLDx - Combined cloud height and coverage 
	CLDT - Maximum value of CLDx
	CLDB - Lowest ceiling; if no ceiling, then height of lowest layer.  
	       Height combined with short code for coverage. 
	COMx - Numeric combined cloud height and coverage
	COMT - Maximum value of COMx
	CEIL - Ceiling in hundreds of feet

 	For the next two cloud parameters the x can be replaced by
 	1, 2, or 3 and represents the cloud report number.

	CHCx - Numeric combined cloud height and coverage
	CHDx - Combined cloud height and short code     

 	The following numeric cloud parameters are WMO standard 
 	codes.

	CFRT - Fraction of celestial dome covered by cloud from WMO
		Code 2700
	CFRL - Fraction of celestial dome covered by low or mid
		clouds from WMO Code 2700
	CTYL - Low-level cloud genera from WMO Code 0513
	CTYM - Mid-level cloud genera from WMO Code 0515
	CTYH - High-level cloud genera from WMO Code 0509
	CBAS - Cloud base height from WMO Code 1600
	CSYL - Low cloud type symbol
	CSYM - Middle cloud type symbol
	CSYH - High cloud type symbol
	CSYT - Cloud type symbol on first reported level
	SKYC - Sky coverage symbol
	SKYM - Sky coverage symbol with wind barbs in m/s
	SKYK - Sky coverage symbol with wind barbs in knots

 	The following numeric parameter follows the guidelines in
 	the National Weather Service Operations Manual, Chapter D-31.

	XVFR - Categorical identification of flight rules 
		0 = Low Instrument Flight Rules (LIFR)
		1 = Instrument Flight Rules (IFR)
		2 = Marginal Visual Flight Rules (MVFR)
		3 = Visual Flight Rules (VFR)

		WEATHER 

	WTHR - Character weather code from any numeric code
	WCOD - Character weather code     
	WNUM - Numeric weather code
	WSYM - Present weather symbol
	WTMO - Character weather code from WMO 
	WWMO - Numeric WMO weather code
	PWTH - Past weather symbol
	PWWM - Numeric past weather in WMO code 

		STATION VARIABLES

	STID - Character station identifier
	STNM - 5-digit station identifier
	SLAT - Station latitude in degrees
	SLON - Station longitude in degrees, West is negative
	SELV - Station elevation in meters
	SPRI - Station priority

		MODEL OUTPUT STATISTICS

	MXMN - Maximum or minimum temperature in Fahrenheit
	TNTF - Night temperature fcst in Fahrenheit
	TNCF - Night temperature climatology in Fahrenheit
	TNAF - Night temperature anomaly in Fahrenheit
	TDYF - Day temperature fcst in Fahrenheit
	TDCF - Day temperature climatology in Fahrenheit
	TDAF - Day temperature anomaly in Fahrenheit
	CL12 - Prevailing total sky cover fcst for a 12-hr period
		1 = CL = mostly clear
		4 = OV = mostly overcast
		7 = PC = mixed clouds and clear skies
	SK12 - Maximum sustained surface wind speed fcst for a 12-hr period
		 5 = light	 0 - 12 knots
		15 = Moderate	13 - 21 knots
		25 = Strong	22 - 33 knots
		40 = High	greater than or equal to 34 knots
	PP06 - Probability of precipitation fcst in a 6-hr period
	PP12 - Probability of precipitation fcst in a 12-hr period
	PP1C - Probability of precipitation climatology in a 12-hr period
	PP1A - Probability of precipitation anomaly in a 12-hr period
	PP24 - Probability of precipitation fcst in a 24-hr period
	PP2C - Probability of precipitation climatology in a 24-hr period
	PP2A - Probability of precipitation anomaly in a 24-hr period
	QPX2 - Maximum amount of precipitation in inches fcst in a 12-hr
		period.  Values are same as QP12
	QP06 - Quantitative precipitation fcst in a 6-hr period
		1 = 0.01 - 0.09 inches
		2 = 0.10 - 0.24 inches
		3 = 0.25 - 0.49 inches
		4 = 0.50 - 0.99 inches
		5 = 1.00 - 1.99 inches
	QP12 - Quantitative precipitation fcst in a 12-hr period
		0 = no precipitation expected
		1 through 5 same as QP06
		6 = greater than or equal to 2.00 inches 
	QP24 - Quantitative precipitation fcst in a 24-hr period
		0 through 5 same as QP12
		6 = 2.00 - 2.99 inches
		7 = greater than or equal to 3.00 inches
	TS06 - Unconditional probability of thunderstorms occurring
		in a 6-hr period 
	TS12 - Unconditional probability of thunderstorms occurring
		in a 12-hr period 
	TS24 - Unconditional probability of thunderstorms occurring
		in a 24-hr period 
	TC06 - Conditional probability of severe weather occurring
		in a 6-hr period 
	TC12 - Conditional probability of severe weather occurring
		in a 12-hr period
	PCPT - Categorical forecast of precipitation
		0 = R = rain
		1 = S = snow
		2 = Z = freezing
	POZP - Conditional probability of freezing precipitation
		(not included during the warm season)
	POSN - Conditional probability of snow
		(not included during the warm season)
	SN06 - Categorical forecast of snow amount falling in a 6-hr
		period
		0 = no snow
		1 = trace to less than 2 inches
		2 = greater than or equal to 2 inches
	SN12 - Categorical forecast of snow amount falling in a 12-hr
		period
		0 and 1 same as SN06
		2 = 2 to less than 4 inches
		4 = 4 to less than 6 inches
		6 = greater than 6 inches
		(not included during the warm season)
	SN24 - Categorical forecast of snow amount falling in a 24-hr
		period
		0 = no snow or a trace
		1 = greater than a trace to less than 2 inches
		2 = 2 to less than 4 inches
		4 = 4 to less than 6 inches
		6 = 6 to less than 8 inches
		8 = greater than 8 inches
		(not included during the warm season)
	PZ12 - Conditional probability of freezing precipitation in a 12-hr
		period
	PS12 - Conditional probability of snow in a 12-hr period
	PR12 - Conditional probability of mixed liquid/frozen precipitation
		in a 12-hr period
	PC12 - Categorical forecast of precipitation type in a 12-hr period
		0 = R = liquid
		1 = S = frozen
		2 = Z = freezing
		3 = RS = mixed liquid and frozen precipitation
		4 = RZ
		5 = SZ
		6 = RSZ
	FCIG - Categorical forecast of ceiling height conditions
		1 = less than 200 feet
		2 = 200 - 400 feet
		3 = 500 - 900 feet
		4 = 1000 - 1900 feet
		5 = 2000 - 3000 feet
		6 = 3100 - 6500 feet
		7 = 6600 - 12,000 feet      
		8 = greater than 12,000 feet or unlimited
	FVIS - Categorical forecast of visibility conditions
		1 = less than 0.5 miles
		2 = 0.5 - 0.875 miles
		3 = 1.0 - 2.75 miles
		4 = 3.0 - 5.0 miles
		5 = greater than 5.0 miles
	FVSA - Categorical forecast of visibility conditions (for new MOS)
		1 = less than 0.5 miles
		2 = 0.5 mile to less than 1.0 mile
		3 = 1.0 to less than 2.0 miles
		4 = 2.0 to less than 3.0 miles
		5 = 3.0 to 5.0 miles
		6 = 6.0 miles
		7 = greater than 6.0 miles
	OVIS - Categorical forecast in plain language of obstructions
		to vision
		0 = N = none of the following
		1 = FG or F = fog or ground fog (vis. less than .625 mile)
		2 = HZ or H = haze, smoke, dust
		3 = BR = mist (fog with visibility greater than .625 mile)
		4 = BL = blowing dust, sand, snow
	WXPB - Categorical weather precipitation probability or areal
		coverage determined by the precipitation parameter having 
		the highest probability or areal coverage in WNUM
		For probability:
		1 = slight chance
		2 = chance
		3 = likely
		4 = occasional
		5 = definite
		For areal coverage:
		1 = isolated
		2 = widely scattered
		3 = scattered
		4 = numerous
		5 = widespread

		TERMINAL AERODROME FORECAST (TAF)

	TDRC - Temporary/probability wind direction in degrees
	TSKN - Temporary/probability wind speed in knots
	TGST - Temporary/probability wind gusts in knots
	BRGK - Gust barb feathered in knots
	TCHx - Temporary/probability numeric combined cloud height and
	        coverage, as for CHCx
	TCEL - Temporary/probability ceiling in hundreds of feet, as for
		CEIL
	TSKC - Temporary/probability cloud coverage graphics symbol, as for
		SKYC
	TXVF - Temporary/probability categorical identification of flight
		rules, as for XVFR
	TWNM - Temporary/probability numeric weather code, as for WNUM
	TWSY - Temporary/probability graphics weather symbol corresponding
		to TWNM, as for WSYM
	TVSB - Temporary/probability visibility in statute miles
	PPRB - Probability for TAF forecast change indicator
        	30 = PROB30 - 30 percent probability condition
        	40 = PROB40 - 40 percent probability condition
        	50 = TEMPO  - temporary condition
	VWNM - Vicinity numeric weather code, as for WNUM
	VWSY - Vicinity graphics weather symbol corresponding to VWNM, as
		for WSYM
	TVWN - Temporary/probability vicinity numeric weather code, as for
		WNUM
	WSKC - Worst case cloud coverage graphics symbol, as for SKYC
	WXVF - Worst case categorical identification of flight rules, as
		for XVFR
	TPWN - Temporary/probability/vicinity numeric weather code, as for
		WNUM
	TPWS - Temporary/probability/vicinity graphics weather symbol
		corresponding to TPWN, as for WSYM
	AWNM - Prevailing/temporary/probability/vicinity numeric weather
		code, as for WNUM
	AWSY - Prevailing/temporary/probability/vicinity graphics weather
		symbol corresponding to AWNM, as for WSYM
	LLWS - Low level wind shear forecast flag
	MOTV - Mountain obscuration threshold value in hundreds of feet
	CMSL - Ceiling converted to mean sea level in hundreds of feet
	MOBS - Mountain obscuration threshold met indicator
	TCMS - Temporary/probability ceiling converted to mean sea level
	        in hundreds of feet
	TMOB - Temporary/probability mountain obscuration threshold met
	        indicator
	WCMS - Worst case ceiling converted to mean sea level in hundreds
	        of feet
	WMOB - Worst case mountain obscuration threshold met indicator
	TCTL - Temporary/probability low-level cloud genera from WMO Code
		0513, as for CTYL
	TCSL - Temporary/probability cloud graphics symbol for TCTL, as for
		CSYL

		MARINE

	WHGT - Wave height in meters
	WHFT - Wave height in feet
	WPER - Wave period in seconds
	HOWW - Height of wind wave in meters
	POWW - Period of wind wave in seconds
	HOSW - Height of predominant swell wave in meters
	POSW - Period of predominant swell wave in seconds
	DOSW - Direction of predominant swell wave in degrees
	HOS2 - Height of secondary swell wave in meters
	POS2 - Period of secondary swell wave in seconds
	DOS2 - Direction of secondary swell wave in degrees
	WAV2 - Combined wind wave period and height in feet ("2 group")
	WAV3 - Combined predominant and secondary swell wave direction
		in tens of degrees ("3 group")
	WAV4 - Combined predominant swell wave period and height in 
		feet ("4 group")
	WAV5 - Combined secondary swell wave period and height in feet
		("5 group")
	WPHM - Combined wave period and height in half meters
	WVSW - Combined swell wave direction, period and height in half
		meters
	SWEL - Character combined swell wave direction, period and 
		height in half meters
	DAWV - Swell wave direction arrows of uniform length
	IDTH - Thickness of ice on ship in meters
	ROIA - Rate of ice accretion on ship from WMO code table 3551
	IGRO - Rate of ice accretion on vessel in salt water in inches
		per 3 hours
	DIGR - Character rate of ice accretion in inches per three hours
	SHPD - True direction from which ship is moving (for 3 hours 
		before obs) in degrees
	SHPK - Ship's average speed (for 3 hours before obs) in knots
	DASH - Ship's true direction arrows of uniform length
	PMN1 - Lowest 1-minute average pressure in previous hour in mb
	PMNT - Time of lowest 1-minute average pressure, as hhmm
	PKWD - Direction of 1-minute peak wind in previous hour in degrees
	PKWK - Highest 1-minute mean wind speed in previous hour in knots
	PKWS - Highest 1-minute mean wind speed in previous hour in m/sec
	PKWT - Time of highest peak 1-minute wind in previous hour, as hhmm
	BRPK - Wind barb (knots) for highest peak 1-minute wind

		AIRCRAFT

	TURB - Amount of turbulence
	TBSE - Base of turbulence in feet
	TTOP - Top of turbulence in feet
	HBOT - Base of turbulence in meters
	HTOT - Top of turbulence in meters
	FQOT - Frequency of turbulence
	TPOT - Type of turbulence
	TBSY - Turbulence symbol
	ICNG - Amount of airframe icing
	IBSE - Base of icing in feet
	ITOP - Top of icing in feet
	HBOI - Base of icing in meters
	HTOI - Top of icing in meters
	TPOI - Type of icing
	ICSY - Icing symbol
	WBSE - Base of weather in feet
	WTOP - Top of weather in feet
	HBWX - Base of weather in meters
	HTWX - Top of weather in meters
	CLC1 - Numeric cloud coverage 1 
	CBS1 - Cloud base 1 in feet
	CTP1 - Cloud top 1 in feet
	CB1M - Cloud base 1 in meters
	CT1M - Cloud top 1 in meters
	CLC2 - Numeric cloud coverage 2
	CBS2 - Cloud base 2 in feet
	CTP2 - Cloud top 2 in feet
	CB2M - Cloud base 2 in meters
	CT2M - Cloud top 2 in meters
	ACRT - Aircraft report type
	SELV - Flight level in meters
	FELV - Flight level in hundreds of feet
	ITSY - Icing type symbol
	TTSY - Turbulence type symbol
	TFSY - Turbulence frequency symbol
	ACTP - Character aircraft type
	ATP1 - Numeric aircraft type

		MISCELLANEOUS

	DDEN - Density of dry air in kg/(m**3)
	VSBY - Visibility in statute miles
	VSBK - Visibility in kilometers
	VSBN - Visibility in nautical miles
	VSBF - Character visibility in fractions of statute miles for
		visibilities between 0. and 1.
	VSBC - Character visibility in fractions of statute miles for
		all visibility numbers
	PnnI - Precipitation over last nn hours in inches
		nn = 01, 03, 06, 09, 12, 18 or 24
	PnnM - Precipitation over last nn hours in millimeters
		nn = 01, 03, 06, 09, 12, 18 or 24
	DPRC - Character daily weather map precipitation in inches
	PR24 - Precipitation over last 24 hours in inches, as sum of
		four successive 6-hour precip amounts
	SNOW - Snow depth in inches
	SNEW - Amount of new snow in inches
	SNRT - Forecast snow and ice pellet accumulation to watch
		threshold ratio
	SI12 - Forecast snow and ice pellet 12-h accumulation in inches
	SNIP - Snow and ice pellet watch threshold in inches
	FZRT - Forecast freezing rain accumulation to watch threshold
		ratio
	FZ12 - Forecast Freezing rain 12-h accumulation in inches
	FZRN - Freezing rain watch threshold in inches
	WEQS - Water equivalent of snow on the ground in inches
	HAIL - Hail flag
	HLSZ - Hail size in centimeters
	HEAT - Heat index in Fahrenheit
	HMTR - Humiture (apparent temperature) in Fahrenheit
	WCEQ - Wind chill equivalent temperature in Fahrenheit
	WCHT - Revised wind chill temperature in Fahrenheit
	MSUN - Duration of sunshine in minutes
	FFnn - Flash flood guidance for next nn hours in inches
		nn = 01, 03, 06, 12 or 24
	TOST - Type of station (manned or automatic) 
		0 = automatic
		1 = manned
	STIM - Report hour and minutes as hhmm
	TEXT - Undecoded data
	SPCL - Undecoded special reports
	MARK - Markers
	DTNM - Sea ice drifting distance in nautical miles
	FOSB - Fosberg index, also called fire weather index

		SPACING

	SPAC - Plot a space, accounted for in FILTER
	BLNK - Plot a blank, not accounted for in FILTER