Geography 341: A Daily Weather Observation Journal
Weather and Society is a class about learning the basics of what causes weather and how society uses an analysis of weather.
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Thursday, May 10, 2012
4:56, Thursday. 10 May 2012.
It's 70 degrees outside right now. There is a light breeze coming from the Southeast. Relative humidity has plummeted since the morning. The reason for this is that the same amount of moisture is in the air but as it warms the air's actual capacity for moisture increases. Parallel to that, the pressure has been steadily declining since this morning because warm air is less dense, exerting less pressure. Looking at the winds chart I see a low cell moving our way from the Dakotas. This is pushing that high cell that was dominating us yesterday out. This new cell is responsible for the Southeast winds we are getting which is the reason it is so warm. If you look at Michigan which is still on the cusp of that high cell, they have Northwest winds and it's probably a bit colder there and maybe rainy.
Wednesday, May 9, 2012
9:26, Wednesday. 9 May 2012.
It is currently 58 degrees outside. It is getting late into the evening so the drop in temperature is expected; however, it was enormously hot today so I suspect we had a shift in wind direction and are now feeling the effect of a nearby cold front. If that isn't the case then it could be that it has cooled more than normal because we don't have a lot of cloud cover right now, the clouds act like a blanket keeping heat in over night so when they are gone more heat escapes at night. The clouds that are in the sky are Cumulus and the wind is blowing from the West. Looking at the radar, there aren't any nearby cold fronts but we are in the bulge of continental polar air from the jetstream.
Tuesday, May 8, 2012
9:55, Tuesday. 8 May 2012.
It's 52 degrees and very humid with wind coming from the Northeast. We have overcast Cumulo-nimbus clouds and it rained not to long ago. The air pressure is rising rapidly, probably since it rained. Looking at the present wind conditions across the map it is clear that there is a sizable trough in the jetstream starting at Wisconsin and going up the East Coast. This cool air from the north is probably what is bringing the high pressure and maybe the cause of our rain.
Wednesday, May 2, 2012
9:12, Wednesday. 2 May 2012.
It's a whopping 73 degrees out right now! The sky is overcast by Cumulonimbus clouds (that means it's raining). Air pressure is kind of mid-high.
I can see there are low cells in Wyoming and Kansas. The Kansas cell should draw lots of moisture up into the Plains, once the Wyoming cell moves over Wisconsin it could feed off of that moisture siphoning it further north.
You will notice that the winds over Texas meet and form a northward line along the yellow dashed line. I'm not sure what this is possibly a dry line. Also there is a very close high cell over Arizona to that low cell, this is going to intensify the storms because the steep gradient will produce high winds and the high altitude air will descend from the mountains warming a bringing water vapor into the system.
I can see there are low cells in Wyoming and Kansas. The Kansas cell should draw lots of moisture up into the Plains, once the Wyoming cell moves over Wisconsin it could feed off of that moisture siphoning it further north.
You will notice that the winds over Texas meet and form a northward line along the yellow dashed line. I'm not sure what this is possibly a dry line. Also there is a very close high cell over Arizona to that low cell, this is going to intensify the storms because the steep gradient will produce high winds and the high altitude air will descend from the mountains warming a bringing water vapor into the system.
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