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Post by ral31 on Sept 3, 2021 14:26:11 GMT -5
Dry and a bit hotter than normal. Temps +1.3F and precip -1.93". There was better storm coverage to my north and south last month. Hurricane Ida was hardly an issue here with the storm tracking well to my east. All I got from Ida was a few showers and gusty winds no more than 34 mph. ![]()  Lowest max: 80F Highest min: 78F Days 90F and above: 28 Days 100F: 2 Days with thunder: 13 Highest dewpoint: 79F Average dewpoint: 73F Lowest dewpoint: 61F ![]()  ![]() |
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Post by jetshnl on Sept 3, 2021 21:24:10 GMT -5
August was one of the worst I can ever remember in the UK, I know I wanted it cooler than Malta but this was taking the piss. There were no warm/hot days at all, sunshine was below average & rainfall here was above average, when the rest of the SE was average or below. Most of the rain fell within the first week, with only very light showers or drizzle falling from the often cloudy sky during the rest of the month. I am now using data from my PWS in my location which is 5 miles inland (8 miles from Portsmouth & 7 miles from Thorney Island) & 79m asl. Have also included weather boxes from my three nearest Met Office stations, Thorney Island, Gosport Fleetlands & Southampton Oceanography Centre (Hayling Island is closest, but is a manual station, so no data available). Stats from my PWS Av. Max 20.8C (-0.9C)* Av. Min 12.9C (-0.5C)* Mean 16.9C (-0.7C)* Highest Max 23.4C (14th) Lowest Min 10.1C (17th) Lowest Max 18.1C (30th) Highest Min 15.4C (18th) Rainfall 79.3mm (161%)* Max Rain in Day 37.9mm (7th) Days with Rain 13 Days with >1.0mm 6 Days with Thunder 0 Sunshine 150.1hrs (68%)* Max UV 6 Min UV 2 Max Sea Temperature 19.6C Min Sea Temperature 18.3C Mean Sea Temperature 18.8C *against averages from Thorney Island How do you get sunshine hours for your PWS? |
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Post by desiccatedi85 on Sept 3, 2021 23:29:07 GMT -5
Not a good August by any stretch of the imagination but at least better than the hellishly wet crummer month of July 2021. This August started off on a good note, with the first 18 days recording under an inch of rain in total and containing a heatwave maxing out at 98, on 2 days in a row. TS Henri also dropped the majority of the month’s rainfall, and just 7 days had falls of over .1”. Feels like this is becoming a theme here — months are getting longer dry stretches but also more extreme rainfall events. Ended up warmer (+1.6ºF) and wetter (+2.5”) than average for the month, despite the nice, dry first 18 days of the month. LGA Airport - August 2021 Summary| Record High | 98ºF (37ºC) | | Average High | 86ºF (30ºC) | | Average Low | 73ºF (23ºC) | | Record Low | 64ºF (18ºC) | | Total Rainfall | 6.91” (176mm) | | Rain (thunder) Days | 7 (6) | | 90º+ (95º+) Days | 8 (2) |
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Post by AJ1013 on Sept 4, 2021 1:36:29 GMT -5
Synopsis: August 2021 was slightly cooler than average and much wetter than average here in Tucson. Cool and wet weather in the middle part of the month was sandwiched by hot and generally dry conditions to begin and end August. One of the wettest monsoons in Tucson's history rolls on. Temperature:Record High: 107F (4th) Highest Min: 82F (5th) Average High: 97.0F (-1.6F) Mean: 85.7F (-1.2F) Average Low: 74.4F (-0.7F) Lowest Max: 88F (31st) Record Low: 69F (14th) Precipitation:
Rainfall: 3.85" (194%) Rain Days: 12 (+2) Rainiest Day: 2.15" (14th)  |
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Post by jgtheone on Sept 4, 2021 1:44:49 GMT -5
Not much to say, this was just the icing on the cake for one of the worst summers I've ever had the misfortune of living through. I now consider myself a global warming advocate.  Join me and leave your car running outside every night. We'll both have subtropical climates in no time. |
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Post by flamingGalah on Sept 4, 2021 5:40:14 GMT -5
August was one of the worst I can ever remember in the UK, I know I wanted it cooler than Malta but this was taking the piss. There were no warm/hot days at all, sunshine was below average & rainfall here was above average, when the rest of the SE was average or below. Most of the rain fell within the first week, with only very light showers or drizzle falling from the often cloudy sky during the rest of the month. I am now using data from my PWS in my location which is 5 miles inland (8 miles from Portsmouth & 7 miles from Thorney Island) & 79m asl. Have also included weather boxes from my three nearest Met Office stations, Thorney Island, Gosport Fleetlands & Southampton Oceanography Centre (Hayling Island is closest, but is a manual station, so no data available). Stats from my PWS Av. Max 20.8C (-0.9C)* Av. Min 12.9C (-0.5C)* Mean 16.9C (-0.7C)* Highest Max 23.4C (14th) Lowest Min 10.1C (17th) Lowest Max 18.1C (30th) Highest Min 15.4C (18th) Rainfall 79.3mm (161%)* Max Rain in Day 37.9mm (7th) Days with Rain 13 Days with >1.0mm 6 Days with Thunder 0 Sunshine 150.1hrs (68%)* Max UV 6 Min UV 2 Max Sea Temperature 19.6C Min Sea Temperature 18.3C Mean Sea Temperature 18.8C *against averages from Thorney Island How do you get sunshine hours for your PWS? The light sensor on my PWS gets converted to W/m2, it then uploads to the Cumulus MX software which uses the Ryan-Stolzenbach algorithm (or you can choose the Bras one). Using your global location & altitude, this plots a graph of your maximum possible solar irradiation at any point during the day & the data from your weather station gets plotted against this. If your solar irradiation is at least 75% of the possible maximum it counts it as "bright sunshine". There are a couple of other settings too to tweak including the transmission factor, which you need to change depending on time of year. Obviously this isn't going to be as accurate as a proper (& very expensive) sunshine recorder, but it seems to be working well so far. |
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Post by Babu on Sept 4, 2021 5:57:29 GMT -5
How do you get sunshine hours for your PWS? The light sensor on my PWS gets converted to W/m2, it then uploads to the Cumulus MX software which uses the Ryan-Stolzenbach algorithm (or you can choose the Bras one). Using your global location & altitude, this plots a graph of your maximum possible solar irradiation at any point during the day & the data from your weather station gets plotted against this. If your solar irradiation is at least 75% of the possible maximum it counts it as "bright sunshine". There are a couple of other settings too to tweak including the transmission factor, which you need to change depending on time of year. Obviously this isn't going to be as accurate as a proper (& very expensive) sunshine recorder, but it seems to be working well so far. I think tommy just came |
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Post by flamingGalah on Sept 4, 2021 8:49:09 GMT -5
The light sensor on my PWS gets converted to W/m2, it then uploads to the Cumulus MX software which uses the Ryan-Stolzenbach algorithm (or you can choose the Bras one). Using your global location & altitude, this plots a graph of your maximum possible solar irradiation at any point during the day & the data from your weather station gets plotted against this. If your solar irradiation is at least 75% of the possible maximum it counts it as "bright sunshine". There are a couple of other settings too to tweak including the transmission factor, which you need to change depending on time of year. Obviously this isn't going to be as accurate as a proper (& very expensive) sunshine recorder, but it seems to be working well so far. I think tommy just came I'm surprised he's not doing this with his station, since it's basically the same model. |
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Post by Steelernation on Sept 4, 2021 13:22:25 GMT -5
The light sensor on my PWS gets converted to W/m2, it then uploads to the Cumulus MX software which uses the Ryan-Stolzenbach algorithm (or you can choose the Bras one). Using your global location & altitude, this plots a graph of your maximum possible solar irradiation at any point during the day & the data from your weather station gets plotted against this. If your solar irradiation is at least 75% of the possible maximum it counts it as "bright sunshine". There are a couple of other settings too to tweak including the transmission factor, which you need to change depending on time of year. Obviously this isn't going to be as accurate as a proper (& very expensive) sunshine recorder, but it seems to be working well so far. Is there a way to figure out that theoretical maximum without that specific PWS? The weather station here records solar radiation, so this method could work if there’s a way to calculate the maximum possible radiation. |
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Post by tommyFL on Sept 4, 2021 13:48:45 GMT -5
I'm surprised he's not doing this with his station, since it's basically the same model. Too shaded and I don't trust the pyranometer on it anyway. Nowhere in my yard gets direct sunlight for more than about 4 hours per day. |
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Post by tommyFL on Sept 4, 2021 13:52:32 GMT -5
The light sensor on my PWS gets converted to W/m2, it then uploads to the Cumulus MX software which uses the Ryan-Stolzenbach algorithm (or you can choose the Bras one). Using your global location & altitude, this plots a graph of your maximum possible solar irradiation at any point during the day & the data from your weather station gets plotted against this. If your solar irradiation is at least 75% of the possible maximum it counts it as "bright sunshine". There are a couple of other settings too to tweak including the transmission factor, which you need to change depending on time of year. Obviously this isn't going to be as accurate as a proper (& very expensive) sunshine recorder, but it seems to be working well so far. I think tommy just came I pity those who mock people trying to approximate data when they don't have the privilege of access to expensive equipment. The data from my method speaks for itself, with errors of between 1-4% for the vast majority of locations. |
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Post by flamingGalah on Sept 4, 2021 17:59:03 GMT -5
The light sensor on my PWS gets converted to W/m2, it then uploads to the Cumulus MX software which uses the Ryan-Stolzenbach algorithm (or you can choose the Bras one). Using your global location & altitude, this plots a graph of your maximum possible solar irradiation at any point during the day & the data from your weather station gets plotted against this. If your solar irradiation is at least 75% of the possible maximum it counts it as "bright sunshine". There are a couple of other settings too to tweak including the transmission factor, which you need to change depending on time of year. Obviously this isn't going to be as accurate as a proper (& very expensive) sunshine recorder, but it seems to be working well so far. Is there a way to figure out that theoretical maximum without that specific PWS? The weather station here records solar radiation, so this method could work if there’s a way to calculate the maximum possible radiation. Yeah it will work with any station that measures solar radiation, or has a lux sensor that can be converted to W/m2. As long as the station make/model is supported by the Cumulus MX software (& pretty much all are) then you just put in your latitude, longitude & elevation into the main settings & then choose which algorithm you want to use in the "solar" settings. |
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Post by flamingGalah on Sept 4, 2021 18:02:46 GMT -5
I'm surprised he's not doing this with his station, since it's basically the same model. Too shaded and I don't trust the pyranometer on it anyway. Nowhere in my yard gets direct sunlight for more than about 4 hours per day. That's a shame. I have found it to be surprisingly accurate as have been checking my daily sunshine hours against my nearest official stations for the last month. |
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Post by Ariete on Sept 4, 2021 18:29:27 GMT -5
August was cooler than normal, and the wettest since 1987, though 2005 comes very close just 1 mm short. The record high was the lowest since 2000. Especially the period between the 18th and 27th was shocking, coolest since 1992, with averages of 17.1C/10.9C. The final 4 days of the month brought the averages up just a bit. Still, after a glorious June and July, August was a shock to the system and a hit straight to the balls coming from the north.
Highest high: 24.7C (12th and 13th) Highest low: 16.9C (9th) Lowest high: 15.1C (27th) Lowest low: 6.1C (24th)
Deviations from 1991-2020,
High: -1.3C Mean: -0.9C Low: -0.4C Precipitation: 187%
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Post by urania93 on Sept 5, 2021 4:15:30 GMT -5
Here there is a quick summary of my August weather stats. Starting from the closest weather station to my village (where I spent most of the month, because August is the closing month in our university even for people working there):   Turin city center:   Turin airport (as a reference)   In my village August was warmer than July, which is quite uncommon. Using the stats for the airport station as a reference ( 71-00 averages), highs were 1.4°C warmer than the average, the low 0.5°C warmer, and the month was significantly dryer than usual (I don't quantify this because in summer most of our precipitation is made of sparse rain showers and thunderstorms, so the monthly mm of rain can change significantly also among close stations, just look at the last day of August in the three charts). In some other parts of the region this lead to a quite serious drought, in some places the supply of water for irrigating fields and gardens was cut in the last few weeks. |
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Post by Crunch41 on Sept 5, 2021 13:31:51 GMT -5
August was warm (+3.2F) and saw the first above-average rainfall since January (131%). Average dew point was 65F/18C.
 The second week of the month was warm and stormy. The wet soil and high winds on the 10th knocked over trees causing hundreds of power outages. The news said around 200k lost power (in a 1.5 million metro) which was the worst outage in a while (decades?). Good storms that week. Highest heat index was the 10th. 91 dew 77 (33/25) at 6pm (104F/40C heat index), followed by 89/78 at 7pm (32/26). The middle of the month was average and quiet. Then it was warm and humid again, with two more 95F/35C highs (4 total for the summer) and a 95/77 (35/25) day on the 28th. Thunderstorms a few of those days.
The month was too warm and humid for me, but finally, some good storms! June and July didn't have much except for one at the end of July. Temperature graphs with dew and wind in spoiler. 2nd week: Temperature and dew point use the left scale, wind uses the right scale (10 knots = 18.5kph)  A storm came around 7pm on the 10th which is the steep drop in dew point. 7pm was 89/78, 8pm 79/67, 9pm 73/68. Another one came around the same time on the 11th and a 79F dew was reported (26C). Mid-month was comfortable and quiet. Nothing exciting.  Then a long stretch of 70 degree dews. The steep temp drops such as the 24th are from rainfall. That day went from 89/77 to 72/68 in 2 hours.  Overall, summer was warmer and drier than average.
2nd Warmest summer average temperature (JJA combined)
74.1 in 2012
73.8 in 2021, 1995, 1988
73.3 in 2020
73.2 in 2010
73.0 in 2016
Other records:
June: 2nd warmest mean temp. First June to have every day record a max of at least 70 (lowest max was 73)
July: none
August: 6th warmest mean temp. First August to have every day record a max of at least 75. Tied for 4th warmest record low of 59. |
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Post by Speagles84 on Sept 6, 2021 10:42:08 GMT -5
Speagles84 2021 August Summary - Summer 2021 Summary
Warm, wet, wet, and did I say wet? Another well above average summer month when it comes to precip. September is already well above due to Ida's deluge.
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Post by srfoskey on Sept 6, 2021 13:57:50 GMT -5
August 2021 was another forgettable month. Temperatures and precipitation were almost exactly average, but with less temperature variation than normal. We had a few decent thunderstorms, but nothing crazy. The hottest weather came at the end of the month, which was a bit unusual. Summer, however, was the coolest since 2004, and the year-to-date is coldest since 1979. If we don't hit 100F (38C) this September, it will be the first year since 2004 to not hit 100. This year is also shaping up to be Dwa, which is somewhat uncommmon.   |
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Post by Cadeau on Sept 6, 2021 18:17:49 GMT -5
▼ <Monthly Climate Anomaly over Japan>
▼ <Time Series of Temperature Anomaly>
▼ <Time Series of 10days Precipitation Amount Ratio and Sunshine Duration Ratio>
▼ <10-day Mean Sea Level Pressure>
▼ <10-day Mean 850hPa Temperature>
▼ <10-day Mean 500hPa GeoPotential Height>
▼ <10-day Mean Outgoing Longwave Radiation>
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Post by Cadeau on Sept 6, 2021 18:41:46 GMT -5
Reykjavík, Höfuðborgarsvæðið, Iceland August 2021  *Note 1: 2nd hottest August since 1949. (2nd of 73 years)<August warmer than 12°C mean> | Rank | Average Mean | Year/Month | | 1st | 12.8°C | 2003/08 | | 2nd | 12.7°C | 2021/08 | | 3rd | 12.6°C | 2004/08 | | 4th | 12.3°C | 2012/08 |
<August with less than 100 hours of sunshine duration> | Rank | Sunshine Hours | Year/Month | | 1st | 63.4 | 1983/08 | | 2nd | 73.0 | 1955/08 | | 3rd | 74.8 | 1995/08 | | 4th | 85.7 | 1978/08 | | 5th | 87.8 | 1976/08 | | 6th | 89.5 | 2021/08 | | 7th | 92.8 | 1975/08 | | 8th | 93.2 | 1969/08 | | 9th | 96.2 | 1981/08 |
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