More complete discussion of the parameters and how they are calculated will come in future releases. For now, here is a listing of the parameter names for reference.
You do not need to review the details of this page unless you have a particular question about a parameter.
THERMODYNAMIC DATA
- P. Water - precipitable water (in)
- Mean RH - mean relative humidity (%)
- MeanW - mean mixing ratio (g/kg)
- Mean LRH - unknown, may be mean relative humidity in low levels (%)
- Top of Moist Lyr - the estimated top of the surface moist layer, pressure (mb), hgt ASL (ft)
- 700-500mb lapse rate - temperature difference and temperature change per km
- 850-500mb lapse rate - temperature difference and temperature change per km
- SWEAT index - SWEAT= 12(850Td) + 20(TT - 49) + 2(V850) + (V500) + 125(sin(dd500 - dd850) + 0.2)
- Any negative term is set to zero, and winds must be veering with height, or that term is set to zero.
- 850Td = 850 mb dewpoint temperature
- TT = Total Totals Index
- V850 = 850 mb wind speed
- V500 = 500 mb wind speed
- dd500 - dd850 = Directional veering of wind with height
- Total Totals - TT = (T850 - T500) + (Td850 - T500)
- ThetaE Diff - vertical theta-E difference between mid level and low levels (C)
- WBZ level - web bulb zero level height in ft
- K-Index
- Max Temp - forecast max temperature (F)
- Conv Temp - convective temperature (F)
- FGZ level - freezing level 0C