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April 2011 general discussion/obs thread


Hoosier

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This is gonna sound CRAZY lol, but I was actually hoping for a very overcast day today. The sun can shine tomorrow lol. The skycover average for DTW for April (on a scale of 0-10) was hovering at 9 for the past week, but the average was down to 8 yesterday. if the skycover today is 9 or 10, the month of April will end at 9, if it is 8 or less, it will end at 8. To have a skycover of 9 out of possible 10 in the month of April is unheard of (hell, its very rare to have 8). In Dec-Feb, month;y skycovers of 8 are common and 9 shows up once in a while..but April? Would be one hell of a feat.

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This is gonna sound CRAZY lol, but I was actually hoping for a very overcast day today. The sun can shine tomorrow lol. The skycover average for DTW for April (on a scale of 0-10) was hovering at 9 for the past week, but the average was down to 8 yesterday. if the skycover today is 9 or 10, the month of April will end at 9, if it is 8 or less, it will end at 8. To have a skycover of 9 out of possible 10 in the month of April is unheard of (hell, its very rare to have 8). In Dec-Feb, month;y skycovers of 8 are common and 9 shows up once in a while..but April? Would be one hell of a feat.

:sun:

Sunshine Today!!!

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We went through all of March and April without a single day of measurable snow here. In fact our last measurable snow was Feb 26th and that was only a few tenths. Our last snow of an inch or more was back on the Groundhog Day blizzard. What a bizarre and unusual way we ended winter here. The lack of snow from Feb 2 on brings this winter down to an A IMO. Hard to believe since snowfall was well above average for the winter, and we had some very impressive snow events to say the least. Even with that I have a hard time giving this season an A+ with such a poor performance beyond early Feb. It was definitely a fantastic winter overall, but the way it ended leaves a bad taste to an otherwise spectacular season.

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This is gonna sound CRAZY lol, but I was actually hoping for a very overcast day today. The sun can shine tomorrow lol. The skycover average for DTW for April (on a scale of 0-10) was hovering at 9 for the past week, but the average was down to 8 yesterday. if the skycover today is 9 or 10, the month of April will end at 9, if it is 8 or less, it will end at 8. To have a skycover of 9 out of possible 10 in the month of April is unheard of (hell, its very rare to have 8). In Dec-Feb, month;y skycovers of 8 are common and 9 shows up once in a while..but April? Would be one hell of a feat.

Well the skycover ended up at 7 yesterday (thanks to clear skies during the non-daylight hours), so no sun to show for it, but ended up with an April skycover of 8. Still very impressive. Not saying its a good thing, just saying I appreciate almost any weather item out of the ordinary (except low snowfall which luckily hasnt happened in a while, and knock on wood, hopefully is far off lol).

May starts right where April left off, gray.

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Well the skycover ended up at 7 yesterday (thanks to clear skies during the non-daylight hours), so no sun to show for it, but ended up with an April skycover of 8. Still very impressive. Not saying its a good thing, just saying I appreciate almost any weather item out of the ordinary (except low snowfall which luckily hasnt happened in a while, and knock on wood, hopefully is far off lol).

May starts right where April left off, gray.

Judging from the satellite we might as well tally another cloudy day. Hopefully we won't have to contend with these Omega blocks for too much longer.

20110501_1545_DTW_vis.jpg

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The rapid warming trend that has been observed in April in northern Ohio continued in 2011. Since 2000, only one April has featured below normal temps, and that was 2007. Although widely noted for a very cold spell, even that April wasn't very cold, coming in around 2 degrees below normal. Overall, the average April temp from 2001 through 2011 at Youngstown is 50.1. This is 2.7 degrees warmer than the 1971-2000 normal. Such a large departure sustained over a significant period of time is highly unusual. Other months have also tended to be a little bit above normal, but nothing near that level, so it seems like the temperature changes are most pronounced in the transitional period (perhaps due to a slightly north trend of the jet stream). Interestingly, though, the jet stream was reportedly further south than usual this April and temps still wound up 1.6 degrees above normal (although a lot of people think wrongly that this was a cool April due to the changes that already occurred [for instance, although 1.6 degrees above the 1971-2000 normal, it was 1.2 degrees colder than the 2001-2010 10 year mean].

Of course, we're also seeing evidence of climate change in other areas as well. Five of the ten snowiest winters on record (dating to 1934) have occurred since 2004. Likewise, four of the ten wettest years on record (dating to 1896) have occurred since 2003. And this year is currently on pace to be the wettest on record.

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The rapid warming trend that has been observed in April in northern Ohio continued in 2011. Since 2000, only one April has featured below normal temps, and that was 2007. Although widely noted for a very cold spell, even that April wasn't very cold, coming in around 2 degrees below normal. Overall, the average April temp from 2001 through 2011 at Youngstown is 50.1. This is 2.7 degrees warmer than the 1971-2000 normal. Such a large departure sustained over a significant period of time is highly unusual. Other months have also tended to be a little bit above normal, but nothing near that level, so it seems like the temperature changes are most pronounced in the transitional period (perhaps due to a slightly north trend of the jet stream). Interestingly, though, the jet stream was reportedly further south than usual this April and temps still wound up 1.6 degrees above normal (although a lot of people think wrongly that this was a cool April due to the changes that already occurred [for instance, although 1.6 degrees above the 1971-2000 normal, it was 1.2 degrees colder than the 2001-2010 10 year mean].

Of course, we're also seeing evidence of climate change in other areas as well. Five of the ten snowiest winters on record (dating to 1934) have occurred since 2004. Likewise, four of the ten wettest years on record (dating to 1896) have occurred since 2003. And this year is currently on pace to be the wettest on record.

You must be ytterbium.

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April 2011 was the wettest April on record for Waterloo, Ontario.

136.5mm of rain was recorded, the highest since recording keeping began in 1914.

It's also the second wettest first four months of the year on record with 391.4mm of precipitation by April 30. The average is 264.4mm. 1954 holds the record for the wettest first four months at 401.3mm.

Full April weather summary from the University of Waterloo weather station:

http://weather.uwaterloo.ca/download/historical/2011/2011-04t.pdf

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