** DEFINITIONS **

[CPR]  = Combined probability (Prob_Field_1 x Prob_Field_2 x ... x 
         Prob_Field_N)
[MAX]  = Maximum from any member at each grid point
[MD]   = Median
[MDXN] = Median value contoured.  The dashed red line is the union of 
         all members at the lowest contour value plotted (i.e., where 
	 at least one of the 16 members exceeds the value of the first 
	 median contour).  The dashed blue line is the intersection of
	 all members at the lowest contour value plotted (i.e., where 
	 all 16 members exceed the value value of the first median 
	 contour).
[MIN]  = Minimum from any member at each grid point
[MN]   = Mean
[MNSD] = Mean and Standard Deviation
[PM]   = Probability Matched Mean Value
[PR]   = Probability (percentage of members meeting/exceeding some 
         condition)
[SP]   = Spaghetti



** SPECIFIC INFORMATION ON AVAILABLE FIELDS **

[MDXN]:2m_DewPoint ->2 meter dew point.  Median dew point (contours 
                     start at 55 degF) with union (dashed red) and 
		     intersection (dashed blue) at 55 degF.
[MNSD]:2m_DewPoint ->Mean and standard deviation of 2 meter dew point
[MNSD]:850MB_DewPoint ->As above but at 850 mb (degC)
[MN]:2m_DewPoint ->Mean 2 meter dew point (degF)
[PR]:2m_DewPoint>=50F ->Probability 2 meter dew point >= 50 degf
[PR]:2m_DewPoint>=60F ->Probability 2 meter dew point >= 60 degf
[PR]:2m_DewPoint>=70F ->Probability 2 meter dew point >= 70 degf
[PR]:Cloud_Top_Temp_<=-12C ->Probability cloud top temperature
                             less than or equal to -12 degC. Cloud
			     layer is defined as layers over 100
			     mb thick with dew point depression
			     <= 3 degC.  Temperatures less than
			     -12 degC indicate ice crystals are
			     likely present in the cloud.
[PR]:Cloud_Top_Temp_>=_-8C ->As above but for temperatures >= -8
                             degC.  Temperatures warmer than -8
			     degC indicate that ice crystals are
			     not likley to be present in the cloud.
[SP]:2m_DewPoint_50F ->Spaghetti chart of 50 degF isodrosotherm
[SP]:2m_DewPoint_60F ->Spaghetti chart of 60 degF isodrosotherm
[SP]:2m_DewPoint_70F ->Spaghetti chart of 70 degF isodrosotherm


All SREF information presented herein is for guidance purposes 
only and should not be confused with official SPC operational 
forecasts.  Links to official SPC operational products are found 
at the bottom of every menu.

Many of the SREF products were developed for testing the utility 
of SREF analysis in the prediction of SPC mission critical items, 
including: thunderstorms and severe thunderstorms, large scale 
critical fire weather conditions, and mesoscale areas of hazardous 
winter weather. In order to accomplish this goal and test new and 
unqiue methods of SREF application in an operational environment, 
many fields not produced in the NCEP postprocessor were calculated 
locally for SPC purposes.