Monday, May 9, 2011
Wheres summer?
A lot of people have been complaining this spring hasn't been the best, its been a little cooler than normal and its been above average on the rain. The nights have also been very cool, and even the days in some cases last week we only reached 53 for a high when the normal high is 63. So the question is, where is summer? Well there has been a big block in the jet stream forcing the warm air to stay south and keeping the some what cool weather in new England or north. Now if normal high is 63 and we have been reaching 70 recently, then what am i talking about, right? Well last year we already have had a number of 80 plus days and even a 90 degree day and those were the signs that summer is on its way. But so far this year we have had one 80 degree day the rest have been in the lower to upper 60s to around 70. The other issue is that north to northeast wind. That effects the immediate coast and the cape and the islands, what happens is the northeast wind comes off of that cold oceanic water, which by the way is only 43 degrees, so any wind coming off of those waters are going to make the coast significantly cooler. So you could have it be 70 here in Burlington but on cape Ann or lets say Beverly it would only be 55 to 60 degrees so about a 20 to 25 degree difference which is pretty cool. There has also been this stalled ocean storm for that past 4 days stalled in the middle of the Atlantic but since its stalled and just sitting in the middle of the ocean, and since it is a massive storm it has been throwing a lot of clouds and in some cases showers, and in another case on Saturday when we had those severe thunderstorms, which some included hail. Once that stall in the jet stream gives way we should start to see summer arrive. No one knows when that will happen, but until then be patient, summer will be here soon!
Wednesday, May 4, 2011
Vertex
What an incredible and devastated sight on the tornadoes in the mid sections of the country stretching from the gulf to the Canadian border, in fact it has been the biggest outbreak since 1974 with double the death toll already for the whole year for the number of deaths that people usually die from a tornado. Usually tornadoes last on the ground for about 20 to 30 minutes but these super cells have been so big that these tornadoes have been on the ground causing destruction for more than 2 hours, the cells or tornadoes don't weaken until they get farthest away from the gulf. Some of these storms have been so severe they caused a vertex tornado which is two tornados in one or two tornados side by side each other creating a 2 mile radius which is a huge tornado, most likely characterized as an ef-5 tornado. You see the gulf has a lot of moisture and any little rain shower that runs into the gulf moisture is going to ignite and fire up a huge outbreak of tornadoes. We already know that though scientist say and that is true, that is normal for the typical tornado alley, and that is the question why have these tornadoes been the biggest out break since 1974 with more than 300 people dead? Scientist still don't know and they are still doing a lot of research what they do know is that it has been a huge outbreak and what they still don't know is why. They have one clue of what it could be and that is global warming. That does make sense with dew point temperatures running to 70 degrees which is oppressive and the strong jet stream, plus the gulf moisture it is the perfect ingredients to cause severe weather. The gulf moisture has played a major role in weather the past 6 to 8 months first with the bad winter we had which by the way we topped off with 81 inches of snow for the whole winter which is double what we normally get and that is because of the Greenland block which forced the jet stream to dip to the gulf then the storm would gain moisture travel up the eastern seaboard and slam us with snow. Now the Greenland block has given way, so that is not causing it. Now scientist think with the stalled front on top of the Midwest and the gulf moisture that would definitely cause this severe outbreak. What happens is you get these stalled very weak frontal systems that bring light showers but what happens is when the front is stalled the showers never go away the front is always producing showers so the showers would run into the gulf moisture, then comes the dew points or the humid air, then the jet stream and there is the answer to the severe weather, but that is not the 100 percent answer scientist say they need to find the exact cause and find out if these severe outbreaks will last into the summer. If that is the case, scientists say we need to figure out a way we can prepare people or evacuate people so death tolls cannot be as high.
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