RickS Posted December 14, 2018 Report Share Posted December 14, 2018 I still don’t think that is for Lakeside proper but probably GDL. As a test why doesn’t someone write down the forecast from above (say, next 5 days) and compare it with the acutal temperatures that will come from stations at Lakeside. Anyone up to the challenge? Link to comment Share on other sites More sharing options...
johanson Posted December 14, 2018 Author Report Share Posted December 14, 2018 It is my understanding that the actual weather report for lakeside comes from the Guadalajara airport with adjustments made because of the large heat sink (Lake Chapala) which gives off heat when the water is much warmer than the cold air and much cooler during the summer during the very hot weather. They say that the lake can warm the air up to 5 degrees F during a very cold night and lower up to 5 degrees F during a very hot day. So the weather forecast for the coldest nights at the airport is adjusted upwards up to 5 degrees and the opposite for forecast of very hot weather. There are next to no corrections when the hot air or cold air projection is close to the temperature of the lake. Maybe 15 years ago there was a weather channel for Mexico like we have up north and there was an actual weather station near the lake on the West side of Chapala. But when the Weather Channel for Mexico closed down, any weather forecast was based on not the Chapala site but the closest official site which is at the GDL airport. Link to comment Share on other sites More sharing options...
Ferret Posted December 14, 2018 Report Share Posted December 14, 2018 IF I could find an outdoor thermometer, I would take up the challenge. It was hard enough finding a rain gauge locally. Thermometers? You're dreaming. Link to comment Share on other sites More sharing options...
sm1mex Posted December 14, 2018 Report Share Posted December 14, 2018 Maybe at the garden store just east of 7-Eleven in Riberas Link to comment Share on other sites More sharing options...
Bisbee Gal Posted December 14, 2018 Report Share Posted December 14, 2018 On 12/12/2018 at 11:27 AM, AngusMactavish said: Chapala, Mexico 10 Day Weather 11:17 am CST Print DAY DESCRIPTION HIGH / LOW PRECIP WIND HUMIDITY TODAY DEC 12 ACTUAL: 73.7 59.4 Mostly Cloudy 73°51° 0% WSW 9 mph 48% THU DEC 13 ACTUAL: 72.7 59.4 Partly Cloudy 72°44° 10% W 7 mph 56% FRI DEC 14 ACTUAL: 69.7 56.7 Partly Cloudy 68°39° 0% NE 6 mph 43% SAT DEC 15 ACTUAL: 63.8 50.3 Sunny 69°43° 0% ENE 5 mph 33% SUN DEC 16 Partly Cloudy 70°45° 0% ENE 4 mph 42% MON DEC 17 Partly Cloudy 72°47° 0% ENE 4 mph 45% TUE DEC 18 Partly Cloudy 72°49° 0% SE 5 mph 53% WED DEC 19 Partly Cloudy 70°46° 0% SSW 7 mph 56% THU DEC 20 Partly Cloudy 67°46° 10% ESE 5 mph 58% FRI DEC 21 Mostly Sunny 67°44° 20% ESE 6 mph 59% SAT DEC 22 Partly Cloudy 70°45° 20% SE 4 mph 59% SUN DEC 23 Partly Cloudy 71°46° 10% SSE 5 mph 58% MON DEC 24 Partly Cloudy 72°48° 20% SE 4 mph 62% TUE DEC 25 Partly Cloudy 72°47° 20% ESE 4 mph 62% WED DEC 26 Mostly Sunny 74°49° 0% ESE 4 mph 59% THE INSERTED RED NUMBERS ARE FROM WWW.AJIJIC WEATHER.COM Link to comment Share on other sites More sharing options...
Ellie Posted December 14, 2018 Report Share Posted December 14, 2018 Actually, some time ago I found outdoor thermometers at the dollar store on the Ajijic plaza. Bought two - one vertical and the other round. One finally bit the dust and I'm now on the second one.... Link to comment Share on other sites More sharing options...
johanson Posted December 14, 2018 Author Report Share Posted December 14, 2018 Me too. And all I know at the top of Ajijic (only the woods and a steep hill behind me) that the weather forecast is usually pretty close most of the time. I sure hope that they are wrong about tonight though : 37 F or 2 to 3 C is too cold for me down here in my non insulated home. Link to comment Share on other sites More sharing options...
RickS Posted December 14, 2018 Report Share Posted December 14, 2018 Way to go Bisbee Gal.... if you could/would do that for a few more days it would be nice. So one can see that, in the last 3 days anyway, the nighttime forecasted temps are nowhere near the actual temps ‘on the ground’ in Ajijic. I suspect, but don’t have proof, that the big lake is responsible for the difference. Link to comment Share on other sites More sharing options...
johanson Posted December 15, 2018 Author Report Share Posted December 15, 2018 I get up at about 7 AM and I too will do a couple of days of checking and posting my results in upper Ajijic just above Las Salvias, especially tonight and or tomorrow morning when it is suggest that we will reach the high 30s or low 40s. I'm guessing that I will be no lower than the low 50s. At least I hope that is the case. EDIT temperature update Sat morning checked between 6:50 and 8 AM 51 F Link to comment Share on other sites More sharing options...
Ferret Posted December 15, 2018 Report Share Posted December 15, 2018 Just for interest sake, I got up at 6:45 and put my inside thermometer (not rain or weather proof) outside. It was reading 21 Celsius inside. 45 minutes later outside, it was reading 9 Celsius. I am so happy to have upgraded my windows and the skylight in the atrium. The difference in temperature indoors has been dramatic and worth every penny. Link to comment Share on other sites More sharing options...
Mainecoons Posted December 15, 2018 Report Share Posted December 15, 2018 I rode my moto back from Tula, NE of Mexico City yesterday. When I got up there was frost on the bike. I layered up, even neck warmer, thinking I would be removing layers as I rode west. First thing encountered, very cold and dense fog until the second toll booth on Mexico 15D. Then strong cold winds. To make a long story short, I never removed any of the warmies all the way home! Link to comment Share on other sites More sharing options...
sm1mex Posted December 15, 2018 Report Share Posted December 15, 2018 52 on my porch this morning. Link to comment Share on other sites More sharing options...
johanson Posted December 15, 2018 Author Report Share Posted December 15, 2018 The www.ajijicweather.com measured a low of 50.3 F. So we all measured about the same. Why this weather forecast is always so far off, suggests that they are basing there projection from weather station data from somewhere else perhaps at the GDL airport.. Does anyone know where? Link to comment Share on other sites More sharing options...
tomgates Posted December 15, 2018 Report Share Posted December 15, 2018 52 in Ajijic centro. Far cry from forecasted 37! Link to comment Share on other sites More sharing options...
RickS Posted December 15, 2018 Report Share Posted December 15, 2018 7 minutes ago, johanson said: The www.ajijicweather.com measured a low of 50.3 F. So we all measured about the same. Why this weather forecast is always so far off, suggests that they are basing there projection from weather station data from somewhere else perhaps at the GDL airport.. Does anyone know where? Pete, if you go back to the beginning of this thread you will see that Bisbee Gal Posted that the ajijicweather site ‘says’ that their forecast temps relate to the GDL airport. Elsewhere I have seen before from, like Accuweather, the same ‘disclaimer’. It has been this way ‘forever’ and I was just wondering if these days some legitimate weather ‘forecaster’ might be reporting for Lakeside proper.... but that appears to not be the case. Not surprising I guess. This mornings temps, verified by you and Bisbee Gal and Tom pretty much confirm that at least morning forecast temps for Lakeside cannot be relied upon to be accurate. Link to comment Share on other sites More sharing options...
johanson Posted December 15, 2018 Author Report Share Posted December 15, 2018 I guess the reason I was that somewhere I read or thought I read that people taking the weather forecast data from the GDL Airport would always add 5 degrees F to the cold weather projections during the winter and subtract 5 degrees F during the summer because of the effects created by that great "heat sink", lake Chapala. and this weather forecast did not seem to do that. I have always in interested in the topic of weather, but I have to admit I know almost nothing about the topic. Link to comment Share on other sites More sharing options...
mexbound Posted December 16, 2018 Report Share Posted December 16, 2018 Hey everyone. I am the owner of the ajijicweather.com website. It's very simple. The temps, humidity etc.. from my site all come from Rancho del Oro. The instruments are very "NOAA" approved. I can get into details about "fan aspirated" temperatures (which I have) but I think my temps and humidity are valid. Maybe another day I will tell you where and how much above the roof the sensors are, to make readings valid. Life is great here. Lets have fun. Just remember that my weather site is divided into two data gathering sites. First my own data (on the top of the site) which is Rancho Del Oro, gathered over 8 years and current every day every 5 minutes. The lower portion of the site is data taken from accuweather.com from the Guadalajara airport.. Which I have noted on the main page. Link to comment Share on other sites More sharing options...
Bisbee Gal Posted December 16, 2018 Report Share Posted December 16, 2018 7 hours ago, mexbound said: Hey everyone. I am the owner of the ajijicweather.com website. It's very simple. The temps, humidity etc.. from my site all come from Rancho del Oro. The instruments are very "NOAA" approved. I can get into details about "fan aspirated" temperatures (which I have) but I think my temps and humidity are valid. Maybe another day I will tell you where and how much above the roof the sensors are, to make readings valid. Life is great here. Lets have fun. Just remember that my weather site is divided into two data gathering sites. First my own data (on the top of the site) which is Rancho Del Oro, gathered over 8 years and current every day every 5 minutes. The lower portion of the site is data taken from accuweather.com from the Guadalajara airport.. Which I have noted on the main page. Mil gracias! It's a valuable service for the community. I am in lower Ajijic (one block from shoreline) and my weather station runs 1 to 3 degrees higher than yours which I attribute to the altitude differences between us and my non-professional equipment and placement thereof. Again, thanks for taking on this task. Link to comment Share on other sites More sharing options...
johanson Posted December 16, 2018 Author Report Share Posted December 16, 2018 Another factor impacting your readings, Bisbee Gal, is most likely your closeness to the lake. Link to comment Share on other sites More sharing options...
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