Weather Go Boom

"Aremmes" (aremmes) 08/04/2020 at 11:00 • Filed to: stormlopnik

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TS Isaías is rolling along the US east coast as I type this, and it has made its presence felt up here in Southeastern Pennsylvania. My weather station has been tracking its arrival since last night. This is what it has recorded as of 10:45 AM EDT: a noticeable drop in temperature when it should show a steady rise, air pressure dropping off a cliff, and a steady northeasterly wind that hints at our location relative to the storm per the right-arm rule (facing the wind, the right arm points towards the storm).

I expect the lines to get a lot more squiggly as the day goes by.

Tripper > Aremmes 08/04/2020 at 11:12

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Yeah it was FUCKT driving in this morning 

Monkey B > Aremmes 08/04/2020 at 11:18

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tornado producing cell passed by my location (northern DE) around an hour ago. Reported touchdown a few miles from here. 

Sovande > Aremmes 08/04/2020 at 11:20

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I’m down in the DC area and it just ended.  Get ready for light winds and some rain.  It will be much like a rainstorm, no big deal.

davesaddiction @ opposite-lock.com > Aremmes 08/04/2020 at 11:21

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Wow - what weather station do you have?

RamblinRover Luxury-Yacht > Aremmes 08/04/2020 at 11:22

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Here in western NC, we had a bad soaking thunderstorm a week from this past saturday that struck a router and computer with lightning. Then, this saturday, there was enough rain to wash out the driveway (in which there’s a 6000V primary), a lightning strike on the replacement router (!) and another computer’s ethernet, and a strike causing my grandmother’s phone/internet line to burn out all the way down the mountainside and her interface to *physically explode*.

WHEEE

Aremmes > Tripper 08/04/2020 at 11:22

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Good thing I work from home nowadays. No way would I get close to 422 in this -- too many crazies out there.

Sovande > Aremmes 08/04/2020 at 11:23

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Lookin g at those charts is funny. The temperature one looks like a huge drop. But it really only shows about a 4 degree temp drop. The winds peed is a 0 mph -10 mph swing - not exactly dangerous.

Aremmes > Monkey B 08/04/2020 at 11:24

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Oof, too close for comfort. Did you get a weather alert on your phone as the cell passed by?

Taylor Martin > Aremmes 08/04/2020 at 11:24

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I woke up to the sound of thunder (how far off I sat and wondered). It wasn’t a hurricane, and no winds howled against the house, but boy was it rainy. It’s cool that literally everyone on the east coast is going to get hit by this... although cool may not be the right word for it.

Aremmes > Sovande 08/04/2020 at 11:25

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We're getting half an inch of rain per hour at the moment, certainly more than a light drizzle.

Taylor Martin > Sovande 08/04/2020 at 11:25

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Yep. I’m about an hour out from DC and the rains ended here too. All is calm.

Aremmes > davesaddiction @ opposite-lock.com 08/04/2020 at 11:29

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I have a La Crosse V40A-PRO, sending data out to Weather Underground.

Sovande > Aremmes 08/04/2020 at 11:32

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I mean, it rained hard here for a while, but it’s not a cataclysmic event. A few weeks ago we got 3" in a half hour. That made for sporty conditions and a lot of flooding.

It’s sunny and nice out now.

Aremmes > RamblinRover Luxury-Yacht 08/04/2020 at 11:34

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Ouch! Were any of them connected to surge protectors or UPSes?

Aremmes > Sovande 08/04/2020 at 11:38

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Right, the scale makes it look scary. The temp graph looks inverted versus its normal progression these days , though; it should be around 77-80°F at this time of day, not 67°.

davesaddiction @ opposite-lock.com > Aremmes 08/04/2020 at 11:40

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Cool, thanks! Might have to invest in one...

Tripper > Aremmes 08/04/2020 at 11:41

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I’m lucky in that if I choose to take 422, I’m only on it for 1 mile and the turn from 202 north on to 422 is a huge, double lane, hard right hander. Real fun when you get it to yourself. 202 and 422 can both be bad but I’m only on the newer parts that don’t back up.

Highlander-Datsuns are Forever > Aremmes 08/04/2020 at 11:45

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I was looking for that Delta P graph and am looking forward to see how low the barometric pressure gets over the next few days. 

Monkey B > Aremmes 08/04/2020 at 11:47

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the tv had been alerting all morning, then just after a friend texted confirmed touchdown my phone went off. He experienced heavy winds where he is and there’s reports of damage locally within 10 miles from here. Following the cell on radar it escaped me just a few miles west of here as it continued north.

Aremmes > Highlander-Datsuns are Forever 08/04/2020 at 11:52

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29.49 in Hg right now, with the core of the storm passing about 40 miles to our east.

Highlander-Datsuns are Forever > Aremmes 08/04/2020 at 11:53

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That’s not even that low. For some reason I was thinking -1" from normal.

RamblinRover Luxury-Yacht > Aremmes 08/04/2020 at 12:14

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Both computers and routers were on *power line* surge protection, but it appears that the internet modem is a dark wizard able to withstand shocks itself and pass them on to others. We thought maybe it was the coax line the first time and made plans to surge protect it in future, but had not yet done so when the second wave hit.

Oh yeah, and the first time there was *also* a power surge in the house, so guilt was obscured. Like a “light bulb blows out with visible spark” level surge. Also going to be putting a whole-house surge breaker in, because eff that noise.

The box at my grandmother’s may have been beyond any mortal protection, and it’s AT&T’s hardware anyway. When I say “physically exploded ”, I mean “it burned the wires so badly into the house they’ll have to be rerun, and actually blew the cover off the box ten feet into the yard”.

ttyymmnn > Aremmes 08/04/2020 at 12:23

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Dat pressure drop doe. 

Nom De Plume > Aremmes 08/04/2020 at 14:11

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Ah, temp=dew point is always a good time.  

Aremmes > Nom De Plume 08/04/2020 at 14:37

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It makes the air chewy.