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purduewx80

Meteorologist
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About purduewx80

  • Birthday 05/21/1980

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    Humboldt Park, Chicago

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  1. Getting, by far, our strongest gusts of the event right now - estimating near 50MPH at times. The power has been flickering off and on, which I've never had happen in the city.
  2. Storm motions will be on the order of 50-60MPH+.
  3. Chicago has a program in place to treat what they estimate to be 85,000 ash trees on public property. You can even report suspected infections on the city's 311 site. That pic was on a boulevard w/ ~20 of them, all treated, tagged and healthy. In some ways I guess it's easier to take care of them in a city than in large, rural groves. My dad has saved a few on his property in southern IN, as they're one of his favorites.
  4. Ash trees have been slowly turning here for a couple weeks. Probably muted colors this year with the drought hangover and late warmth. Looking forward to a few downpours later, if everything goes right.
  5. Many should make a run for 90 deg today, though ORD could get 89'd again depending on how fast the front sneaks down the lake. DVN's 850 T was 23C at 12Z, which is the warmest so late in the year (by one day). Full sun, dry soils and good mixing potential all favorable for overachieving even the warmest of guidance.
  6. tennis-ball-sized hail in WI in the general thunder outlook (one unconfirmed photo showing a stone 3"+). 12Z soundings indicate mid-level lapse rates of 7-8.5C/km. shear 40-50KT+. pretty good indication to me the outlook is underplaying today.
  7. That is most definitely not how you read that. It's the altimeter, which was 29.22" or around 989.5mb. Looks like he deleted both tweets fortunately.
  8. The HRRR late-CI bias is in full effect today given TS in the QC already. Its coverage is probably too low given the lake breeze boundary and strong MCV moving in during peak heating, but it overall seems to have the right idea for IL/IN this eve. Probably some pulse severe wind but mainly heavy rain given the weak shear and slow storm motions. Definitely some uncertainty tomorrow on the best overlap of shear and CAPE - SPC seems to be playing the farther S scenario for now which make sense if the effective front is shoved south by TS tonight. On the other hand, the 18Z HRRR is definitely showing a D-word scenario up into SE MN. IMO the training/flood setup tomorrow night has a pretty high ceiling in parts of the region.
  9. Today has definitely been an interesting setup that relied 100% on nowcasting. In aviation we try to come up with a convective forecast that helps the FAA plan routes in and out of the area (mainly for ORD) - been one of the lower confidence days of the summer given zero model support. If you read through all of LOT's AFDs today, you'll see how the forecast has been evolving back and forth as conditions change. At one point we thought the dry air observed on the 12Z OAX sounding would inhibit TS this far south, but it seems to me the corn belt helped with moisture flux from the surface up to the 925-800mb level. This all resulted in MLCAPE rapidly increasing this afternoon (which the NAM has done well with despite mostly missing the actual wx). Definitely not the best time to be flying into O'Hare today.
  10. Supercells on the N side of the outflow boundary are pretty interesting. Looks like a fairly narrow corridor of extreme low-level shear w/ NNE winds on the cold side of the boundary and SSW winds just above.
  11. Destabilizing very quickly now thanks to incredibly steep mid-level lapse rates and strong low-level moisture transport. I don't really see the stratus the SPC mentions in their latest discussion as a hindrance to an increase in TS development this evening given the advective processes ahead of several well-established mesocyclones. Confirmed tornado east of Mineral Point now - in the worst spot for radar detection, but the meso is obviously impressive (via KDVN).
  12. that one is so close. once it moves right and interacts with the boundary in the next hour, look out. Any of these tail-end charlies have the best chance of remaining more discrete and interacting with the outflow from this morning.
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