|
|
Post by Morningrise on Jun 2, 2021 23:13:30 GMT -5
May was a little below average and yet another bone dry month, at least until the last week when we finally got our first proper rain event since the fall and received 33mm in a single day. Due to the dryness we had colder than normal nights through much of the month include more deep freezes than usual, and it was a sunnier than average month, just like all the other months this year so far. Average high: 18.0C (normal: 18.2C) Average low: 2.2C (normal: 4.1C) Mean temperature: 10.1C (normal: 11.2C) Warmest high: 32.6 (May 17th) Warmest low: 11.0 (May 31st) Coldest high: 4.2 (May 20th) Coldest low: -9.8 (May 3rd) Warmest mean: 21.7C (May 17th) Coldest mean: 0.3C (May 3rd) Precipitation: 35.5mm (normal: 43.0mm) Precipitation days: 5 (normal: 8.3) Sunshine hours: 314.1 (normal: 263.0) Sunshine percentage: 64.3 (normal: 54.1)  |
|
|
|
Post by Babu on Jun 3, 2021 3:00:57 GMT -5
Cloudy month in Sweden. Borlänge (173h in central Sweden) broke its all-time record. It was looking a hell of a lot bleaker until the few days which came with half of the month's total sunshine in many places.  |
|
|
|
Post by kronan on Jun 3, 2021 5:12:40 GMT -5
Cloudy month in Sweden. Borlänge (173h in central Sweden) broke its all-time record. It was looking a hell of a lot bleaker until the few days which came with half of the month's total sunshine in many places. Göteborgs sunshine recorder must’ve malfunctioned or somerhing. Weird, because there were no gaps in the data. |
|
|
|
Post by Babu on Jun 3, 2021 5:43:21 GMT -5
Cloudy month in Sweden. Borlänge (173h in central Sweden) broke its all-time record. It was looking a hell of a lot bleaker until the few days which came with half of the month's total sunshine in many places. Göteborgs sunshine recorder must’ve malfunctioned or somerhing. Weird, because there were no gaps in the data. Idk, probably just caught in a preliminary review of the data |
|
|
|
Post by Ariete on Jun 3, 2021 8:55:51 GMT -5
It's Boteving. They didn't want to show Gothenburg's appaling stats.
|
|
|
|
Post by srfoskey on Jun 3, 2021 13:26:35 GMT -5
May 2021 was very cloudy and cool in the Oklahoma City metro. I don't have detailed sunshine data, but I think we had about 10 consecutive days with about 10 hours of sun. We only had a few days the whole month with clear skies. It was the second cloudiest May since 1994. However, rainfall was only slightly above average. We didn't hit 84°F (29°C) until May 26, the latest on record. The high of 63°F (17°C) on May 31 was the latest we had a high that cold since 1982. This was the coldest May of the 21st century.   The Oklahoma Mesonet always likes to add funny memes to their images.  |
|
|
|
Post by tommyFL on Jun 3, 2021 13:30:10 GMT -5
srfoskey How do they know percent sunshine? They actually record it?
|
|
|
|
Post by srfoskey on Jun 3, 2021 13:46:34 GMT -5
srfoskey How do they know percent sunshine? They actually record it? They record solar radiation, and I guess they have a way of converting it to percent sunshine. This is what the maps normally look like.
|
|
|
|
Post by tommyFL on Jun 3, 2021 14:35:13 GMT -5
srfoskey How do they know percent sunshine? They actually record it? They record solar radiation, and I guess they have a way of converting it to percent sunshine. This is what the maps normally look like.
Oh right, they say 120 W/m^2 is sun and anything less than that is cloud. Not very accurate in my experience as most radiation sensors will easily record 120 W/m^2 under bright overcast, especially this late in the season at relatively low latitude. |
|
|
|
Post by tommyFL on Jun 3, 2021 14:38:36 GMT -5
AJ1013 Virginia Key so far. No rainfall/humidity data. 
|
|
|
|
Post by srfoskey on Jun 3, 2021 15:21:43 GMT -5
They record solar radiation, and I guess they have a way of converting it to percent sunshine. This is what the maps normally look like.
Oh right, they say 120 W/m^2 is sun and anything less than that is cloud. Not very accurate in my experience as most radiation sensors will easily record 120 W/m^2 under bright overcast, especially this late in the season at relatively low latitude. Yeah, they should probably do 50% of the theoretical maximum or something like that. |
|
|
|
Post by Babu on Jun 3, 2021 15:39:04 GMT -5
They record solar radiation, and I guess they have a way of converting it to percent sunshine. This is what the maps normally look like. Oh right, they say 120 W/m^2 is sun and anything less than that is cloud. Not very accurate in my experience as most radiation sensors will easily record 120 W/m^2 under bright overcast, especially this late in the season at relatively low latitude. I think the definition is 120 W/m² direct radiation, i.e. only the light coming directly from the direction of the sun, excluding diffuse radiation coming from other parts of the sky. You can't just take a flat solar panel, point it towards the sun or the sky, and use that to decide whether it's "officially sunny" or not. Originally, a large glass sphere would focus light onto a piece of film at the focal point behind the sphere, and if the sunlight burnt through the film, it counted as sunshine. If there are thin clouds in front of the sun making the sun itself hard to discern as a dot in the sky, but still allowing quite a bit of light and heat to shine through, it's not going to burn a hole when focused, because while the total amount of radiation is still moderate, it's all coming from different directions. Modern pyranometers used for recording sunlight have advanced systems for detracting diffuse radiation and isolating the direct radiation. This is why they cost a dozen thousand dollars, and this is why your idea to build your own sun recorder is going to be a waste of time, energy and resources. (Especially since... what's the point? Why do you need a pws to record sunshine when there are already so many sun stations in Florida?) |
|
|
|
Post by tommyFL on Jun 3, 2021 15:50:28 GMT -5
Oh right, they say 120 W/m^2 is sun and anything less than that is cloud. Not very accurate in my experience as most radiation sensors will easily record 120 W/m^2 under bright overcast, especially this late in the season at relatively low latitude. (Especially since... what's the point? Why do you need a pws to record sunshine when there are already so many sun stations in Florida?) This is where it all falls apart. Sunshine hasn't been recorded in this state in 30 years, and it has never been recorded less than 100 miles away from where I am. I'm merely interested in the variation in sunshine along the east coast of Florida, especially in the Cape Canaveral area. I never proposed building my own sunshine recorder. I would rather look for an old C-S recorder. |
|
|
|
Post by Babu on Jun 3, 2021 15:52:56 GMT -5
(Especially since... what's the point? Why do you need a pws to record sunshine when there are already so many sun stations in Florida?) This is where it all falls apart. Sunshine hasn't been recorded in this state in 30 years, and it has never been recorded less than 100 miles away from where I am. I'm merely interested in the variation in sunshine along the east coast of Florida, especially in the Cape Canaveral area. I never proposed building my own sunshine recorder. I would rather look for an old C-S recorder. It certainly seemed like you were discussing building your own sun recorder, and sending links of cheap ebay knockoff pyranometers. There really aren't sun recorders in Florida? In that case I do take it back. And yeah, a manual c-s recorder is probably gonna be a safer bet |
|
|
|
Post by AJ1013 on Jun 3, 2021 17:06:13 GMT -5
AJ1013 Virginia Key so far. No rainfall/humidity data. Nice lol. Quintessential tropical beach. |
|
|
|
Post by ilmc90 on Jun 3, 2021 19:08:15 GMT -5
High for the month was almost bang on average, low a couple degrees below average so we finished about 1 degree below the long-term.   |
|
|
|
Post by Benfxmth on Jun 4, 2021 6:38:49 GMT -5
OK, here're the weather boxes for the two main airports. Interesting how strong the contrast is precipitation-wise for January—the following anomalies are for CIA AP, relative to raw 1991-2020 averages. JanuaryAverage high: –0.3°C (–0.5°F) Mean: –0.3°C (–0.5°F) Average low: –0.2°C (–0.5°F) Precipitation: +115.8 mm (+4.56"; 265% of normal) FebruaryAverage high: +2.4°C (+4.4°F) Mean: +2.1°C (+3.8°F) Average low: +1.8°C (+3.3°F) Precipitation: –30.5 mm (–1.2"; 52% of normal) MarchAverage high: –0.1°C (–0.1°F) Mean: –0.4°C (–0.8°F) Average low: –0.9°C (–1.6°F) Precipitation: +21.6 mm (+0.85"; 136% of normal) AprilAverage high: –0.9°C (–1.7°F) Mean: –1.2°C (–2.1°F) Average low: –1.5°C (–2.7°F) Precipitation: +18.0 mm (+0.71"; 124% of normal) MayAverage high: –0.7°C (–1.3°F) Mean: –0.3°C (–0.6°F) Average low: –0.1°C (–0.1°F) Precipitation: –35.3 mm (–1.39"; 42% of normal)   |
|
|
|
Post by jetshnl on Jun 4, 2021 17:34:55 GMT -5
For Canada: Hottest location(s) 34.4°C at HIGH PRAIRIE AGDM, Alberta May 20 Coldest location(s) -25.8°C at GATESHEAD ISLAND, Nunavut May 13 Most precipitation 314.2mm at KINGSVILLE MOE, Ontario (seems wet if you look at the daily there’s a day with 240) Summary for all enviro Canadian stations : climate.weather.gc.ca/prods_servs/cdn_climate_summary_e.html |
|
|
|
Post by ral31 on Jun 5, 2021 9:27:31 GMT -5
|
|
|
|
Post by Babu on Jun 5, 2021 9:40:59 GMT -5
OK, here're the weather boxes for the two main airports. Interesting how strong the contrast is precipitation-wise for January—the following anomalies are for CIA AP, relative to raw 1991-2020 averages. JanuaryAverage high: –0.3°C (–0.5°F) Mean: –0.3°C (–0.5°F) Average low: –0.2°C (–0.5°F) Precipitation: +115.8 mm (+4.56"; 265% of normal) FebruaryAverage high: +2.4°C (+4.4°F) Mean: +2.1°C (+3.8°F) Average low: +1.8°C (+3.3°F) Precipitation: –30.5 mm (–1.2"; 52% of normal) MarchAverage high: –0.1°C (–0.1°F) Mean: –0.4°C (–0.8°F) Average low: –0.9°C (–1.6°F) Precipitation: +21.6 mm (+0.85"; 136% of normal) AprilAverage high: –0.9°C (–1.7°F) Mean: –1.2°C (–2.1°F) Average low: –1.5°C (–2.7°F) Precipitation: +18.0 mm (+0.71"; 124% of normal) MayAverage high: –0.7°C (–1.3°F) Mean: –0.3°C (–0.6°F) Average low: –0.1°C (–0.1°F) Precipitation: –35.3 mm (–1.39"; 42% of normal) What about your pws? |
|
