Saturdays Forecast

Output for Rattlesden (RAT) for Saturday

 

The following graphs details the RASP atmospheric predictions for the date shown. This RASP forecast is for the Rattlesden BGA turn point location. Please be patient while the data builds from the latest live data

For Cu Potential, a positive number means there will be Cumulus clouds, a good day is typically around 1000 (or more).

On a good day, we need 10 degrees (or more) difference between the try temperature and dew point.

A sun percentage value of 60% or more means that the ground will warm up and clouds can develop. Less than 50% means there may be top cover or just too much cloud about (e.g. stratus "spread out" or Cirrus "top cover".)

Boundary layer cloud percent is useful to see if over developing. If the sun percent is low but the boundary layer percent is still high, check the Skew-T for top cover.

Ideally we do not want rain. A hint of a tenth of a millimetre means the air is fairly damp and the wet/dry temperatures will be close to each other.

Note that the 'Stars' forecast is experimental and based on original work by Paul Scorer.

Other Major Parameter Links for Rattlesden (RAT) for Saturday

 

The following lists links to other RASP parameters which you can use to help with the forecasting.

 

 

  • Depth of Boundary Layer [ft]

  • Boundary Layer Top Uncertainty/Variability Top Uncertainty/Variability (for +1degC)

  • Surface Heating [W/m~S~2~N~]

  • Depth of Critical Updraft Strength (AGL Hcrit) [ft]

  • Buoyancy/Shear Ratio Truncated~C~

  • Cu Potential [ft]

  • Boundary Layer Vertical Wind Shear [kt]

  • Boundary Layer Max. Up/Down Motion [cm/s]

  • Cu Cloudbase (Sfc. LCL) [ft]

  • Overcast Development Potential [ft]

  • Boundary Layer Explicit Cloud Base [AGL] (CloudWater>1e-05) [ft AGL – max=18000]

  • Boundary Layer Cloud Cover [%]

  • Height of Boundary Layer Top [ft]

  • CAPE [J/kg] Convective Available Potential Energy

 

For all airspace and daily notifications, check the CAA NOTAMS. This information is provided on an as-is basis and not an alternative for flight planning.

Location

Rattlesden Gliding Club

Rattlesden Airfield

Near Felsham

Bury-St-Edmunds

Suffolk IP30 0PT (use for GPS)

Booked Trial Flights

Fridays

Saturdays

Sundays

Phone, text or email us using form below:

Contact

Phone: 01449 737789 (PPR etc)

Mobile: 07484 148015 (flights and membership)

Launch Point: 07926 812833

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