Weather forecasts

Below is some general information regarding the weather forecasts that the Cirrus Forecast service creates.

Update frequency

Depending on which plan you subscribe to, the weather forecast gets updated at different times and frequencies. Below you will find a breakdown for each plan.

Plan Updates per day Hours updated
Stratus 5 12am, 6am, 12pm, 5pm, 9pm
Cumulus 8 12am, 3am, 6am, 9am, 12pm, 3pm, 6pm, 9pm
Nimbus 12 12am, 2am, 4am, 6am, 8am, 10am, 12pm, 2pm, 4pm, 6pm, 8pm, 10pm
Cirrus 24 Every hour

Time of day

Period Time
Morning 6:00:00 AM – 11:59:59 AM
Afternoon 12:00:00 PM – 4:59:59 PM
Evening 5:00:00 PM – 8:59:59 PM
Night 9:00:00 PM – 5:59:00 AM

New forecast availability

Forecasts for the following hour are created within 15 minutes before that hour so it will be available before the top of the hour.


If a location is subscribed to the Cirrus plan and it is almost 1pm, the weather forecast file for 1pm will be created between 12:45pm and 1:00pm.

Weather Alerts

Weather alerts are available on the Cirrus plan. This is to ensure alerts are always up-to-date and expired alerts are not included.

Alerts in the United States are from the National Weather Service. If you are in another country, please contact us and we can check to see if alerts are available in your area.

A few general notes:

  • All active and future alerts are announced at the beginning of the forecast
  • Alerts are sorted by severity - warnings, watches, and then advisories
  • If there are many alerts, some may be removed starting with advisories to make sure the forecast fits within 30 seconds
  • Maritime related alerts are not included

Climate adjustments

A climate adjustment allows you to adjust the words used in your weather forecast for the winter and summer months depending on if your climate is colder or warmer than average during those months. The climate adjustment is done by setting a temperature adjustment between -30 and +30 in increments of 10. An adjustment can be made for the winter and the summer independently.

{info} For climate adjustments, winter is considered to be November through April and summer is considered to be May through October. This assumes you are in the Northern Hemisphere. If you are in the Southern Hemisphere, please contact us and we will accommodate your different seasons.

The average temperatures we use are between 20-35°F in the winter and between 70-85°F in the summer. Extremes are considered below 0°F and above 100°F.

The table below is a loose guide to help you determine if you need to make a climate adjustment. Please note that temperatures are in Fahrenheit.

Adjustment to make Winter average Summer average Low extreme High extreme
-30 -10 to 5 40 to 55 Below -30 70 and above
-20 0 to 15 50 to 65 Below -20 80 and above
-10 10 to 25 60 to 75 Below -10 90 and above
0 (default) 20 to 35 70 to 85 Below 0 100 and above
+10 30 to 45 80 to 95 Below 10 110 and above
+20 40 to 55 90 to 105 Below 20 120 and above
+30 50 to 65 100 to 115 Below 30 130 and above


Selling sponsor spots for your weather forecasts is a great way to raise additional revenue.


The maximum length of a sponsor is 175 characters which is approximately 20-25 words.

{info} In order to keep the forecast within 30 seconds, as the sponsor gets longer, the weather forecast will get shorter. Meaning, less details are given or less weather periods are provided in order to accommodate the longer sponsor.


Here are some examples to get you started.

If you don't currently have a sponsor, you could use something like the following:

  • listeners like you
  • listeners like you. If you would like to sponsor this forecast, please call us at 123-456-7890

Other examples:

  • Bob's Pizza. Order online at
  • Larry's Hardware at 123-456-7890 or
  • Media Grid LLC, providing consulting in software development and systems architecture specializing in business and SaaS applications. We can be reached at

If you have issues with a website being pronounced or it is being said too fast, try spelling it out:

  • bob's pizza dot com
  • larry's hardware dot com
  • media grid dot u s

Disclaimer: The websites above are examples only. We do not endorse or disapprove of any companies/websites used. Only one exception, our own of course, Media Grid LLC :)