[AZ-Observing] Re: How to interpret the Clear Sky Clock
- From: Tim Jones <tjmac@xxxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Tue, 27 Nov 2012 13:18:50 -0700
Maybe they saw our discussion and checked with the Canadian folks :-).
Tim
On Nov 27, 2012, at 1:15 PM, Stan Gorodenski <stanlep@xxxxxxxxxxxxx> wrote:
> NOW there is no disconnect. When I posted my message the NWS forecast
> said 'Mostly Clear' as I stated in my original message. Now it says
> 'Partly Cloudy'.
> Stan
>
> On 11/27/2012 11:22 AM, Tom Polakis wrote:
>> There's no disconnect. The NWS forecast reads "partly cloudy," which
>> is what it will be for the average Joe in 18 hours. Most folks just
>> want to know if it's going to rain or not; they don't care if there is
>> cirrus covering 20% or 80% of the sky.
>> The Clear Sky Chart is more appropriate for astronomers. That forecast map
>> for total cloud shows a mixture of light blue and white. It's likely that
>> you will catch glimpses of the moon, Jupiter, and bright stars in with that
>> thick cirrus. So "partly cloudy" sounds about right.
>>
>> For what it's worth, CSC uses a forecast model from Environment Canada,
>> while NWS is obviously a U.S. service.
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