Latest Available Ascents
StationDate/Time1000-500mb h' (dam)1000-850mb h' (dam)700mb T (°C)500mb T (°C)850mb T (°C)PWAT (mm)850mb WBPT (°C)0-6km Shear (kt)
Climatology Percentile Key
0-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85-89 90-94 95-99 100


Click on the timestamp to see the ascent. The value in brackets is the percentile within a climatology generated according to the selected climate length.

  • Daily: Created using ascents only from the day and month of the year of the relevant ascent
  • Monthly: Created using ascents only from the month of the year of the relevant ascent
  • Annual: Created using all ascents
  • 7-day centred: Created using a 7-day window centred on the date of the relevant ascent
  • 15-day centred: Created using a 15-day window centred on the date of the relevant ascent
  • 31-day centred: Created using a 31-day window centred on the date of the relevant ascent
  • 91-day centred: Created using a 91-day window centred on the date of the relevant ascent

All climates are generated without including the current ascent, so it can be seen where it sits with respect to climate without influencing the climate (i.e. for assessing records). If the percentile is >100% or <0%, then you are dealing with an absolute record (based on the climate you've selected, and the magnitude of the percentile gives an indication of how far outside of climatology the value sits. If you see NULL that means the data is either missing or has been rejected by QC.

Precipitable Water (PWAT) is calculated in the layer between surface and 300mb, which is usually only slightly different from calculating the PWAT of the entire ascent, but enables a more systematic climatology to be developed.

Wet Bulb Potential Temperature at 850mb (WBPT850) is calculated using an accurate system of linear equations accurate to 0.5°C or better for 96.0% of ascents.

Ascents should renew every 12/24 hours, depending on station schedule.