powderfreak

What a dew front! BTV was a humid 72F Td at 11:15am... an hour later at 12:10pm it is 52F. A 20-degree drop in the dew point in 55 minutes. That line of showers is the dew front... It's still 70F Td here and about to get soaked again... dews in the 50s are a few miles away.

The worst of the worst. That sucks.

Yikes. Yeah this is the set-up where you get like 0.04" of rain and your dew goes up another 5F immediately. Sun comes back out and you see steam rising off the pavement putting more low level moisture into the boundary layer.

The drier air is on it's way though. Dews are plummeting to the west and it just hit BTV. SLK dew went from 67F this morning to 50F currently! BTV dew just dropped 11 degrees in the past hour down to 60F. We don't get cold fronts anymore, just dew fronts.

This is a pretty long stretch of near 70F dews up here. Had some very short but intense downpours last night, like 30 seconds of torrential rain then nothing, then 30-seconds of torrential rain then nothing. It was tropical.

That's the concerning part. But then again I've seen a lot of people go on social media to call out a business where someone wasn't wearing a mask or had one below their chin, but then like 20 people will chime in that they go into that store almost daily and everyone has masks on. You never know when you might catch an employee or two (who might wear a mask for 7 hours out of an 8-hour shift) with it down under the chin after just taking a drink of water or something. A friend did have one interaction in a backwoods country store up here in VT where the woman at the deli counter making sandwiches had her mask down under her chin and a customer asked her to put it up while making his sandwich. She replied that she has serious lung issues and can't wear the mask, which then devolved into an uncomfortable conversation with her about why she is in that position interacting with so many people if she is so high-risk that her lungs are that bad she can't put a mask on for 5-minutes. She didn't really have an answer. Always a risk embarrassing someone making your food though, ha.

Yup. Lots of one-off's still out there. I think the vast majority of people are on the same page but there are still a few in every state in every region, etc.

Any 80F or higher mins like 2018?

High of 90F today, I believe that’s the 11th of the year. 12 is the record for the ASOS if I remember from a conversation earlier this summer. 0.53” rainfall today too. We’ve been getting decent soakings every few days now for a while. July has been decently wet with almost 5” of rain. 73/71

That’s what you took away from that post? Their temperature sensor looks off by a couple degrees too in that case. I thought you were at least passable with the science side of it. You understand mixing and compressional heating/drying in a valley right? To squeeze out those extra couple degrees you dry out the boundary layer a bit more. For example, now they are 94/64 and the same as CEF. In order to get to 97-98F at BDL, it had to dry the boundary just a bit more than CEF, which had a lower max temp.

Ha sure, but having the hottest temps at BDL but lower dews is exactly what science says should happen. 97/61 at BDL 95/63 at CEF You either get the extra couple degrees at the cost of lower dews, or you keep the dew higher but the temp stays down a tick.

That explains a lot. Do you take the temps down a couple degrees too? I’m with Dendrite... laws of thermodynamics in a valley torch spot would support extra drying where there’s extra heat on mixed sunny afternoons. Probably all brown dead grass around it too.

85/73 The dews are nuts as Dendrite pointed out a few days ago...we'd miss the high heat but get the higher dews. No thanks but that's what we've got. 73F out in a NNE field is impressive... this morning's rain certainly didn't hurt either.

Yeah only took 5 days before games start getting "postponed" due to COVID. This won't last too long at this rate.

Ha that’s funny because I thought they developed that as a convective warm season tool. I do think we’ve seen several times this summer by most models, this over drying/heating of the boundary layer. It just ends up more humid but also not quite as hot as the machine numbers.

It’s the NAM run hourly, what do you think is gonna happen? Lol. It was weird how good it was locally here in some snow events last year but if you run hourly it’s gotta get something right once in a while ha.

Looks like most sites are mid-60s, yeah. There’s usually a tick up in dews late morning but you’ll have to see what the official sites do from 2-5pm.

Just a wave of warmth before the rains? Makes sense, looks like most of the BTV CWA sites ticked upwards ahead of that cluster after trying to cool after sunset.

Looks like even SLK was 75F at 2am, same as BDL. Thats unheard of for that location.

Lots of NNE in the 80s last night. Those clouds and increased flow hit just right to stop and even reverse any cooling that started at sunset. Wild. I still can’t believe that without that round of rain this morning it might have stayed 80s even at spots like here.

Oh it’s long past install, lol. Record hot June took care of that. Now record hot July just for good measure.

Holy crap. I’m just seeing that MVL here was 80F at 2am last night from wind/cloud cover. Got into upper 70s around sunset but then rose back to 82F at 11pm. Thats wild for that ASOS to rise back into the low 80s at midnight. That’s the normal average high temp getting hit at like 1am.

BTV was 81F at 1am last night. Palm trees blowing in the southerly flow. They might have held around 80F all night except that round of showers brought them a half inch of water and got temps into the mid-70s.

Wasn’t expecting the rain. 0.38” so far... enough to soak the vegetation. 70/70

How do dew points and surface moisture affect that? Are the 17-18C days “undered” but surface moisture is a bit more than modeled?