dendrite

Not off hand but those equations are complicated and there’s some disagreement about how the variables are all factored in to come up with an estimate. All of these indices are just estimates. The wind chill one was wrong for decades as well.

Shade to me means under trees or on the north side of a building. 2m temps and dews are measured in open areas with full sun, but they are shielded to protected from solar contamination. We’re trying to get the true air temperature and dewpoint of the air at 2m…not the temp the probe is being heated to due to solar effects.

What is measured in shade?

Okay I think I know what you’re saying. Heat index only encompasses temp and dew and those are both measured in full sunshine albeit with proper shielding. You want something that factors in temp, solar radiation, humidity, and wind. There are equations to calculate that, but you’re not going to get it on an ASOS without a pyranometer to measure the solar rad. Davis uses an equation to calculate THW index or THSW index if you have a solar sensor so I can do that here. But it changes wildly during the day depending on clouds and wind speed. Here’s my THSW index chart for the day. You can see where the sun started hitting the solar sensor and each cloud we had.

Temp and dew are measured in full sun.

Yeah that’s not what I meant. Sorry for the confusion.

I said it would be higher than 89-91 on the euro image you posted. I believe you just posted a static 18z valid map. My point was the actual highs would be 93-95 by using that modelology.

Do you have fan aspiration? I think the differences come down to that. I almost always read lower than the surrounding airport sites, but I have a 9v fan. Those that are passive tend to get the extra few degrees this time of year. The home sensors really aren’t much of a dropoff in accuracy from ASOS anymore. It comes down more to siting and shielding. The Davis Sensirion sensors are only about 0.1-0.2C error now in lab settings.

Not too bad at noon for the hottest day of the stretch.

The old site used to radiate somewhat. The new site doesn’t at all. So there’s some give and take there when it comes down to the means.

Like I said with the GFS 2m temp forecasts last week…bump up the dews and drop the temps.

Anyway, one more hot day in the period up here. I have today off and plan on enjoying it. Long live summer.

No. Keep the science honest. We don’t need sensationalism. It hurts the cause.

The dews were pretty high, but yeah, everything has to be sensationalized now. Climate change is real, but cnn.com is always a good laugh when they get on their rants linking every extreme weather event to climate change.

MEX dropped a 39° at SLK for next week

64.7° Didn’t expect it to get that low this morning.

Let’s dew it again in 2033

Tor warned now

Sun is out up here. 77.7/72

It’s relative too. A temp of 150F with 10% RH is a dew of 90F.

It’s an AWOS so it’s in the FAA’s hands.

Nah. ASH sensor is shiat

Buoy 44069

Toss ASH but yeah

Yup. Moving through ORH county now. Getting breaks south of LEB as well.