Cattle Heat Load Toolbox

Helping you proactively manage summer heat.

The main observational factors of the Cattle Heat Load Toolbox

During the heat of summer there are a number of tasks that need to be undertaken on a daily basis to protect your herd from heat load.


Do your RAP here:

Set your alerts here:

See the latest tools here:



Yes, Christmas is already here! Although we are more than 2 months into the hot season and we have not seen much hot weather, summer has just begun!

During the Christmas period (from Saturday 22 Dec to Sunday 6 Jan) our forecast will run as usual (including e-mail and SMS alerts) and be checked daily to ensure the service is behaving itself. However, there won’t be any phone support. If you have any queries during this period, please send us an email ( and we will get back to you. Note that we will check the e-mail every business day and get back to you as soon as possible.

If you have some spare time over the holidays please think about some maintenance of your weather station. We are seeing a lot of poor quality data coming through which can really impact on the accuracy of your forecast. We have compiled some notes to help you maintain your weather station. You can find the notes in this link. Enjoy reading them! Here a brief summary:

  • Keep the sensors clean: leaves, spider webs, etc. can obstruct ventilation. If you have a black globe temperature sensor (black metal sphere), other foreign enemies (like dust, mud, bird dropping) can have a negative impact.
  • Check that wind sensors (the cups and vane) do not make any noise when spinning. Use desiccant to remove condensation from the air inside enclosures (mast, booms, electrical cable, and connectors).
  • Check cables: they could be attacked by parrots and rabbits!
  • Check the battery (it should be close to the nominal battery voltage that is stamped on the battery case)
  • Inspect the solar panel cover for cracking or crazing, leakage of rain around the edges and dirt.

We wish you a Merry Christmas and, as always, keep an eye on your alerts for possible heatwaves!

From your CHLT team,

Christine, Esteban, Frank, Dush and Trent


The current Risk Assessment Program (or RAP) is being reviewed after MLA/ALFA identified some key areas that need further refinement and improvement. An extensive test will be undertaken this summer so that the new RAP can launch before next season 2019-20. In the meantime, now is the time to do your RAP (the existing version) and assess your risk for the coming summer.

System improvements

We’re always looking at alternative sources of forecast data to see if we can improve the base weather forecast. Currently, we are evaluating various sources to see if they will provide value, and we would love to hear from you to see what additional forecast information may be useful for your operations. Are you concerned about storms? Do you need a warning for dusty conditions? Is evaporation important? Drop us a line, or pick up the phone. We always love to talk about the weather!

As I’m sure you are aware, MLA commissioned UQ to undertake an R&D program to help identify deficiencies in the current HLI/AHLU model. We look forward to implementing any improvements into CHLT as they become available.

These new features are just another reason to get on board with the HLDN and make the most of your site specific data. If you need a hand in setting up your HLDN data feed please feel free to contact us for assistance. As always we are available for comments and suggestions throughout the season and are happy to help.