Posts Tagged ‘Lightning’
Another D Day Special Event
Lightning maps
If you missed G0LRD‘s comment in an earlier post you may want this link that shows lightning activity:
http://www.lightningmaps.org/realtime?lang=en
There are storms in Eastern England and very many over the Alps. Interestingly the CN8 to OZ path has been open on 6m Es today. Some believe there is a correlation between Es and thunderstorms.
UPDATE 1720z: At the moment, the storms have ended but the lightning map shows a further storm is due to come through. At present it is over the Peterborough area and moving SE. I think it is best to NOT reconnect the antennas today.
UPDATE 1751z: The storm over Peterborough seems to be moving in an easterly direction and may miss our village with luck, although I can now hear distant thunder to the north.
UPDATE 1812z: The storm is definitely tracking east over the Bedford Levels in the Fens, towards Littleport, so should miss us. Even so, I’ll stay off air tonight.
UPDATE 2016z: According to the lightning map, all thunder storms have now died out in the UK. I’ll reconnect antennas in the morning.
Lightning damage risk
I am always nervous about lightning strikes.
The excellent Southgate News today told the (true) story of a local CBer who had his vertical and CB rig destroyed by lightning. See http://www.huntspost.co.uk/news/latest-news/
huntingdon_cb_radio_user_almost_electrocuted_after_lightning_
bolt_strikes_aerial_1_3648368http://www.huntspost.co.uk/news/latest-news/
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I usually disconnect antennas when there is lightning about but I am still nervous. One of my friends (not a radio ham and with no big antennas in the air) who lived in a normal estate home had his home struck years ago and it took out lots of his household wiring. The chances of a direct hit are rare, but I am always bothered and never quite sure what the best advice is.
Fire, Lightning, Wind and Dust: New Mexico Weather
New Mexico is dry. I was floored when it rained three days ago. But for 11 months out of the year, the air is dry, the sun is bright, the clouds are facetious, and everything’s on fire.
Smoke plume from the 30,000 acre Silver fire |
Smoke fills the horizon |
Such is life in NM. The 10% humidity caused me some pain and suffering for a while, but I seemed to got used to it. I used a lot of normal lotion, which wasn’t the best idea for being out in the sun so much.
Currently, a large chunk of the Gila mountain range is on fire, but thankfully few people live in the area. The Silver fire (named because its near Silver City, NM) is currently at 32,000 acres, making it the biggest fire in the US. From atop a VLA dish, you can see the smoke plume and the long trail of smoke being carried by 30-40 mph surface winds. It’s quite dark in Truth or Consequences.
Aside from the fire, the plains of central New Mexico have a variety of weather, typically involving some kind of dust and lots of wind:
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Dust carried aloft by 40 mph winds |
We even have tornadoes of dust! (Seriously, some of them are big enough to cause damage):
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A particularly strong dust devil with a well defined center column |
Then, all of a sudden, it storms:
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A snowstorm to the north…it’s a rare event to see precip actually get to the ground. |
Above, you see it’s snowing. Snowstorms in the southwest isn’t a myth after all! Just last year, a snowstorm dumped 2′ of snow on Socorro, NM.
Typically though, the air is so dry that any precipitation just evaporates before it hits the ground. This phenomena is called virga, and is the sole reason why the clouds are so facetious. What does hit the ground are tendrils of lightning, graupel — basically mini snowballs from the sky — and hail.
A tendril of lightning betwixt two VLA dishes |
In 2004, hail fell with a vengeance:
So its dry, its dusty, windy and usually boring (minus the bits of hail, getting caught in a haboob, and waking up to lightning barrages)…but now is the season for rain. And we’re in dire need. NM has been in a 10 year drout, and wells are drying up like int he community of Magdalena, NM, just east of the VLA.
Locals believe that July 4 is the day which marks the start of the monsoon season…don’t take monsoon to seriously though, it’s not like the monsoons of India and Asia. They may dump 2″ of rain, but that gets sucked up so quickly by the dry, absorbent dust and flora of the mountain ranges that it was like it never happened the next day.
We’ll see what the skies bring.
Update from John, W5CYF
After a lightning strike near his house took out a good portion of his shack, John, W5CYF, has posted a video bringing his viewers up to speed to on how his shack is coming along after he has started to get some new equipment to get back on the air. He seems to have a nice collection of radios. Shown in the video is a TenTec Century 21, and a Kenwood TS-520, along with some filters and an MFJ Tuner. In previous videos he described what happened with the strike. While you can never predict when a lightning strike is going to happen, you should still plan for it. Ground your station. I was the victim of a near strike myself. It luckily only fried a few switches in my old FT-901DM. After that, I started grounding the station. While it was unfortunate, we can all learn from this. Here’s the update from John.
73.
Rich also writes a Tech blog and posts stories every Tuesday and Thursday on Q103, Albany’s #1 Rock Station website, as well as Amateur Radio stories every Monday thru Friday on AmiZed Studios and hosts a podcast called The Kim & Rich Show with his fiance’ Kim Dunne.