Friday, July 14, 2017

Accurate weather forecasting, island-style

Good morning - what's the weather today?
 
Our weather forecast for the next ten days is a chance of a thunderstorm, with temperatures ranging from 31°Celsius to 36°Celsius.  That’s hot! 

And maybe it will be true, and maybe it won’t.

We’ll let you know at the end of the ten days.
Photo from internet, summer snow storm BC

Being Canadians, we are obsessed with the weather. In Canada, the conditions can vary tremendously in one day from hot and sunny to downright cold with snow and ice, but hopefully not in June, July, August, September, or October. Although driving through the high-mountain passes of British Columbia in August, we have experienced snow. Not our idea of a fun summertime road trip!

Getting wet - but sunny in 15 minutes





On Isla, we compulsively check two different internet weather sites. I like Intellicast, and Lawrie prefers Weather Underground. Other island friends use Windguru, Accuweather, plus a relatively new one called WeatherSpark. From May to October, we also check NOAA, the American-based National Weather Service, for potential tropical storms.

The strange thing is, the forecasts are only about 50% accurate, even with satellite images and computer modeling. The forecast might be for a chance of thundershowers with the possibility of 117mm of rain (4.5 inches), but we’ll have a hot sunny day with absolutely no rain.

From Isla towards the storm over Cancun
If we look toward Cancun, a few miles to the west, they likely will be experiencing the forecasted rain. 

Now that’s a very odd thing because there are no mountains in the state of Quintana Roo. It is a relatively flat piece of land with the highest point in the entire state located in the southwestern region, and rising a grand total of 230 meters above sea level, or 750 feet. 

There is nothing very tall in the entire state to ‘snag’ the clouds to hold them over the city, yet Cancun seems to get more rain than Isla.

Showers are headed our way

Over time, Lawrie and I have become amateur weather forecasters. We look toward the ocean; if the clouds are dark and the horizon is hazy, we have ten minutes to shut the windows and pull in outdoor cushions. 

Then twenty minutes later, we open the windows and put out the cushions. It’s a tough life!  

When making your vacation plans, don’t be put off by the forecast of grumpy weather. It may or may not be accurate.


Sign near the naval base.
There was, for a short time, a humorous sign, complete with a large stone suspended from a rope, posted near the Isla Mujeres Quinta Region Naval base. 

It summed up weather forecasting on Isla Mujeres

The stone is wet: it’s raining.  
The stone is dry: it’s not raining.  
The stone is swinging: it’s windy. 
The stone is still: it’s not windy. 
There is no stone: it’s blowing a hurricane. 
There are two stones: you’re drunk.

The moral of the story: you’ll know what the weather is going to be when it happens.

Hasta Luego from paradise, Lynda, Lawrie, Sparky, and Max


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