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September 8th Severe Threat

SmokeEater

By SmokeEater,
in Philadelphia Region

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LMolineuxLM1

LMolineuxLM1

Posted
Posted

you wanna know the real reason why this fell apart...Li and ryan didn't chase together, they went there separate ways. Thats like having a peanut butter sandwhich but eating the peanut butter piece first then eating the jelly piece 2nd, just doesn't worl

Didnt fail for me though. Tornado was reported by Me and the Fire Department in Loganville, PA York County where the big rig got knocked over. So it didnt fail for me, called ryan first to let him know about the Funnel cloud as soon as i hungup it dropped and did some damage.

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Parsley

Parsley

Posted
Posted

you wanna know the real reason why this fell apart...Li and ryan didn't chase together, they went there separate ways. Thats like having a peanut butter sandwhich but eating the peanut butter piece first then eating the jelly piece 2nd, just doesn't worl

:lmao:

0.63" . 69 degrees. Nice BBQ weather. :loon:

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tombo82685

tombo82685

Posted
Posted

Didnt fail for me though. Tornado was reported by Me and the Fire Department in Loganville, PA York County where the big rig got knocked over. So it didnt fail for me, called ryan first to let him know about the Funnel cloud as soon as i hungup it dropped and did some damage.

i don't see a tornado report on the LSR...also, big rig can be knocked over with straight line wind damage.

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famartin

famartin

Posted
Posted

Just to make matters clear. I'm not complaining about the storms per say, and perhaps I should have worded differently. Within the heaviest of the rain, which was at 5" per hour at one point, we had what I'd think were a few good gusts. My new station only recorded a peak wind gust of 12 mph. Now, the visuals at that time were of leaf clusters blowing off the tree next to my house, rain blowing sideways, and water blowing off of roof tops. The cups were spinning quite fast I might add. If I didn't have the station, I would have estimated the wind gusts at about 20-30mph, not 12 mph.

I'm trying to figure out if my anemometer isn't recording the right wind speed.

Obstructions matter A LOT when it comes to wind. So does the anemometer height. Remember that an ASOS anemometer is 33 feet above ground at a wide-open airport. Most home anemometers will *never* compare.

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Voyager

Voyager

Posted
Posted

Obstructions matter A LOT when it comes to wind. So does the anemometer height. Remember that an ASOS anemometer is 33 feet above ground at a wide-open airport. Most home anemometers will *never* compare.

I know my station is not in an optimal location for wind. Tamaqua is a small town with a big city footprint (lots of row homes and small properties). Still, watching the cups spin, and the trees moving in the wind, I would have sworn it was more like 20+ mph. maybe I'm wrong since I never had an anemometer before. Perhaps looks are deceiving, and those cup REALLY need to spin for a higher wind speed reading.

BTW, can you do a list of reporting stations and wind gusts like you've done with other events? Or is there somewhere I can find one online?

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famartin

famartin

Posted
Posted

I know my station is not in an optimal location for wind. Tamaqua is a small town with a big city footprint (lots of row homes and small properties). Still, watching the cups spin, and the trees moving in the wind, I would have sworn it was more like 20+ mph. maybe I'm wrong since I never had an anemometer before. Perhaps looks are deceiving, and those cup REALLY need to spin for a higher wind speed reading.

Probably. The trees were almost certainly moving faster than the wind at your station, which as I recall is lower than they are.

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famartin

famartin

Posted
Posted

I know my station is not in an optimal location for wind. Tamaqua is a small town with a big city footprint (lots of row homes and small properties). Still, watching the cups spin, and the trees moving in the wind, I would have sworn it was more like 20+ mph. maybe I'm wrong since I never had an anemometer before. Perhaps looks are deceiving, and those cup REALLY need to spin for a higher wind speed reading.

BTW, can you do a list of reporting stations and wind gusts like you've done with other events? Or is there somewhere I can find one online?

This is your station, yes?

My new weather station I just picked up yesterday (8/30/12). Certainly not the best that money can buy, but then again, my budget just doesn't allow for a $300+ drop right now. It's still way better than what I was using. Time will tell just how accurate everything is, but so far, temps and humidity seem pretty close.

5 in 1 outdoor sensor unit.

Indoor display unit.

It'll never gust as high as the trees are getting, not by a long shot.

For example, when I had the anemometer at that height at my parents' station, the peak gusts averaged 30-40% of what the ASOS reported. Now that its up at standard height (still sheltered by some trees though), its 60-70%... twice as good but still not up to snuff.

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Voyager

Voyager

Posted
Posted

This is your station, yes?

It'll never gust as high as the trees are getting, not by a long shot.

For example, when I had the anemometer at that height at my parents' station, the peak gusts averaged 30-40% of what the ASOS reported. Now that its up at standard height (still sheltered by some trees though), its 60-70%... twice as good but still not up to snuff.

Yup, that's my station. I'd have loved something better, but it fits my needs and is quite accurate with all other readings. I could mount it higher, but then my rain and/or temps might be off, not to mention servicing the unit would be more troublesome. As it sits, I can do it with just a small step ladder.

I have to add that I did a check of PWS in and around my area, and nearly all of them were were in the general ballpark with mine as far as peak winds were concerned. Most within a 20 mile radius of me were between 10-20 mph. Farther east and west and the gusts were higher.

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famartin

famartin

Posted
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Yup, that's my station. I'd have loved something better, but it fits my needs and is quite accurate with all other readings. I could mount it higher, but then my rain and/or temps might be off, not to mention servicing the unit would be more troublesome. As it sits, I can do it with just a small step ladder.

Yes, its a trade-off you have to make for a combo station. Not meant to knock it, just identifying that your winds will likely be only 30-40% of "reality".

I have to add that I did a check of PWS in and around my area, and nearly all of them were were in the general ballpark with mine as far as peak winds were concerned. Most within a 20 mile radius of me were between 10-20 mph. Farther east and west and the gusts were higher.

That may be, but I know many PWS's don't make the effort to put the wind sensor in a location closer to standard. Combo stations like yours abound, and even for those with the option of separating wind from the rest, some still don't put it any better than head level.

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Voyager

Voyager

Posted
Posted

Yes, its a trade-off you have to make for a combo station. Not meant to knock it, just identifying that your winds will likely be only 30-40% of "reality".

That may be, but I know many PWS's don't make the effort to put the wind sensor in a location closer to standard. Combo stations like yours abound, and even for those with the option of separating wind from the rest, some still don't put it any better than head level.

Thanks Ray for the explanations. It helped a lot. As for folks who CAN mount their wind sensors in an appropriate location but don't, it doesn't make sense. If I could, I'd put up a flag pole or something to get it close to the standard height.

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phlwx

phlwx

Posted
Posted

unbelievable how many Mod Risks this year have poo-poo'd out.

considering there were nearly 300 severe wind reports and at least 3 tornadoes, it certainly wasn't a "bust" overall. It may have busted in PA and NJ but 45% odds means it's still better than a coin flip you're going to not see severe within 25 miles of you.

The 0z NAM Friday night did a pretty good job in outlining the threat being to our north...probably should have been farther north than it painted it but it was well placed, IMO.

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fsu_wxgirl

fsu_wxgirl

Posted
Posted

Since I still don't have Internet and followed everything yesterday on my iPhone, can someone explain time why the line came through so early? The models I looked at on Friday and the NWS indicated the main line of storms wouldn't come through until 8 pm or so. Did the system speed up or was there so much instability ahead of the front that the storms fired early? Thanks!

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MGorse

MGorse

Posted
Posted

Since I still don't have Internet and followed everything yesterday on my iPhone, can someone explain time why the line came through so early? The models I looked at on Friday and the NWS indicated the main line of storms wouldn't come through until 8 pm or so. Did the system speed up or was there so much instability ahead of the front that the storms fired early? Thanks!

Looks like the convective line initially developing some bowing structures within it, the line embedded in strong southwesterly flow, and the gust front getting out ahead of it, all helped to move the entire line quickly eastward. It also looks like the actual cold front caught up to and then over took the convective line.

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fsu_wxgirl

fsu_wxgirl

Posted
Posted

Thanks!!

Looks like the convective line initially developing some bowing structures within it, the line embedded in strong southwesterly flow, and the gust front getting out ahead of it, all helped to move the entire line quickly eastward. It also looks like the actual cold front caught up to and then over took the convective line.

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