Cities are the most effective form of weather control
humans have come up with, writes Tim De Chant at Per Square Mile. (This is weather
control we're talking about. Human-caused climate
change is a different thing.) The presence of a city — from pollution particles in the atmosphere, to the heat island effect, to the way tall buildings change air currents — probably both increases rainfall and changes where that rain lands. — Maggie
Typhoon Haiyan approaching the Philippines (13:00 UTC 07/11/2011). Image captured by the geostationary satellites of the Japan Meteorological Agency and EUMETSAT.
The powerful storm named Super Typhoon Haiyan (or Super Typhoon Yolanda, as it is referred to within the Philippines) hit the central islands of the Philippines on Friday, with reported wind speeds of 190 to 195 miles per hour at landfall. For comparison, a commercial airplane takes off at speeds in the range of 160mph.
Haiyan is reported to be the strongest typhoon in the world in 2013, and may be the most powerful recorded tropical cyclone to ever hit land.
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Not CGI, but convection. Krista Mitchell at the BBC Weather Centre: "This rapidly rising air lifts dust, or straw, into the air. When conditions are right, the rising air will rotate."
Earth experienced its 8th warmest spring on record, and the third warmest May
, with average global temperature in May 1.19 degrees F. above the 20th-century average, matching 1998 and 2005 for the third warmest May dating back to 1880. WaPo
: "The global temperature has been above average now 339 straight months (more than 28 years). The last time global temperatures were below average (February, 1985)." — Xeni
Last Friday, a tornado near El Reno, Oklahoma killed scientist Tim Samaras, as well as his son and a colleague. The three were tracking the storm in a vehicle — storm chasing, if you will — as part of their ongoing efforts to deploy probes that could capture high-resolution video from inside a tornado. (Samaras' team was one of many practicing a type of science that can basically be described as Twister in real life.) Chasing storms was an important part of what Samaras did. National Geographic reports that tornadoes only developed in roughly two of every 10 storms Samaras tracked, and the probes were only useful in a fraction of the tornadoes they were deployed in.
Samaras' death is tragic, but he wasn't some untrained yahoo out running around on county roads in a tornado for fun. He was there to do a job; a job that would, eventually, help other people survive. That said, if a situation kills experts, you probably don't want to be that untrained person trying to navigate it on your own.
Which brings us to a key point. After a handful of people who survived the Moore tornado credited their survival to driving away from it, people in Oklahoma City apparently responded to Friday's storms by trying to do the same thing. For some, it worked. But others were killed or injured when traffic on highways in the tornado's path ground to a complete halt, clogged with cars full of people who were (either accidentally or intentionally) trying to flee the storm instead of hide from it.
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House of Mirth
asked several vernacular photo collectors to share their favorite vintage snapshots of weather events. The wave shot comes from Erin Waters' collection and the tornado photo belongs to Steve Bonnos.
Josh Fitzpatrick, meteorologist with WSAZ TV, posts this photo (don't know who took it), with this factoid: "The deepest snow with the #blizzard of 2013 was 40" inches at Trumbull, CT! 7' foot drifts. "
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The Weather Channel posted an internal marketing pitch, I mean feature article, about why they've deemed themselves the official naming entity for big winter storms. From the article:
During the upcoming 2012-13 winter season The Weather Channel will name noteworthy winter storms. Our goal is to better communicate the threat and the timing of the significant impacts that accompany these events. The fact is, a storm with a name is easier to follow, which will mean fewer surprises and more preparation…
This is an ambitious project. However, the benefits will be significant. Naming winter storms will raise the awareness of the public, which will lead to more pro-active efforts to plan ahead, resulting in less impact and inconvenience overall…
Finally, it might even be fun and entertaining and that in itself should breed interest from our viewing public and our digital users.
"Why The Weather Channel is Naming Winter Storms
" (Thanks, Gil Kaufman!)
Yesterday, Australia experienced its hottest nationwide average temperature ever — 40.33 degrees C (104.6 degrees F). Today, the country's national weather bureau added a new color to official weather forecast maps
, reflecting a need to predict temperatures higher than 52 C (125.6 F). Insert your Spinal Tap jokes and terrified flailing here. — Maggie
Winds from approaching Hurricane Sandy turned 1 WTC (previously known as the Freedom Tower) into an æolian harp. (via Doubtful News)
It can be a nice breeze, or a destructive storm, but either way wind is just moving air. And moving air is just moving molecules.
In an explainer for kids that's actually pretty helpful for grown-ups, too, Matt Shipman reminds us that the air around us isn't totally weightless. It weighs something, because molecules all weigh something:
They don't weigh very much (you couldn't put one on your bathroom scale), but their weight adds up, because there are a LOT of molecules in the air that makes up our atmosphere. All of that air is actually pretty heavy, so the air at the bottom of the atmosphere (like the air just above the ground) is getting pressed on by all of the air above it. That pressure pushes the air molecules at the bottom of the atmosphere a lot closer together than the air molecules at the top of the atmosphere.
And, because the air at the top of the atmosphere is pushing down on the air at the bottom of the atmosphere, the air molecules at the bottom REALLY want to spread out. So if there is an area where the air molecules are under high pressure (with a lot of weight pushing down), the air will spread out into areas that are under lower pressure (with less weight pushing down).
Read the full story at Carolina Parent
Image: wind, katarinahissen, a Creative Commons Attribution Share-Alike (2.0) image from mararie's photostream
In the NYT
, a story about "endangered satellites" that orbit the earth and provide essential data for tracking storms like Hurricane Sandy. But because of "years of mismanagement, lack of financing and delays in launching replacements," they could begin falling apart—with no functional plan in sight to maintain those resources. — Xeni
There are two answers here: One for the legitimately curious, and one for people who want a disaster to be a referendum on climate change.
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