dendrite

Are they augmenting the regular hourlies? The 5 min obs look more legit. Why does observing at the climo sites always have to be a shitshow?

WTF are they doing at BOS with the hourly METARs (:54 past) versus the 5 min obs? https://mesowest.utah.edu/cgi-bin/droman/meso_base_dyn.cgi?stn=KBOS&time=GMT

Looking at the 1-min data now...RDU looks fine https://mesonet.agron.iastate.edu/cgi-bin/request/asos1min.py?station=RDU&tz=UTC&year1=2025&month1=6&day1=22&hour1=0&minute1=0&year2=2025&month2=6&day2=22&hour2=23&minute2=59&vars=tmpf&sample=1min&what=view&delim=comma&gis=no No crazy spikes. RDU,Raleigh / Durham,2025-06-22 17:57,91 RDU,Raleigh / Durham,2025-06-22 17:58,92 RDU,Raleigh / Durham,2025-06-22 17:59,92 RDU,Raleigh / Durham,2025-06-22 18:00,91 RDU,Raleigh / Durham,2025-06-22 18:01,92 RDU,Raleigh / Durham,2025-06-22 18:02,93 RDU,Raleigh / Durham,2025-06-22 18:03,94 RDU,Raleigh / Durham,2025-06-22 18:04,94 RDU,Raleigh / Durham,2025-06-22 18:05,94 RDU,Raleigh / Durham,2025-06-22 18:06,95 RDU,Raleigh / Durham,2025-06-22 18:07,96 RDU,Raleigh / Durham,2025-06-22 18:08,95 RDU,Raleigh / Durham,2025-06-22 18:09,96 RDU,Raleigh / Durham,2025-06-22 18:10,97 RDU,Raleigh / Durham,2025-06-22 18:11,96 RDU,Raleigh / Durham,2025-06-22 18:12,95 RDU,Raleigh / Durham,2025-06-22 18:13,94 RDU,Raleigh / Durham,2025-06-22 18:14,94 RDU,Raleigh / Durham,2025-06-22 18:15,93 RDU,Raleigh / Durham,2025-06-22 18:16,93 RDU,Raleigh / Durham,2025-06-22 18:17,93 RDU,Raleigh / Durham,2025-06-22 18:18,93 RDU,Raleigh / Durham,2025-06-22 18:19,92 RDU,Raleigh / Durham,2025-06-22 18:20,92 With the 5min averages it works out to... 1805z 93.4F 1810z 95.8F 1815z 94.4F So the coding for the 5 min obs we see would take that as 93 (34C/93.2F)...96 (36C/96.8F)...94 (34C/93.2F). So Allan sees 93 97 93 on his site.

I mean we're talking 100F vs 99F I just picked a random hot month...July 2011. HFD 87.9 BDL 87.3 Both hit 103F on the hottest day.

HFD and BDL are both 80.5F for the avg high in June through yesterday.

It's fine. It's back to what it used to be.

Bye BOS https://mesowest.utah.edu/cgi-bin/droman/meso_base_dyn.cgi?stn=KBOS&time=GMT

@CoastalWx Got a date of a good screen door slammer at BOS within the last 2 years?

BOX fixed the sensor. It was running a clear 3F too warm. It's been pretty good lately.

Yeah the sensor is malfunctioning. It just did it again.

@CoastalWx 7/22/2011 for BOS. 104F at 1949z https://mesonet.agron.iastate.edu/cgi-bin/request/asos1min.py?station=BOS&tz=UTC&year1=2011&month1=7&day1=22&hour1=0&minute1=0&year2=2011&month2=7&day2=22&hour2=23&minute2=0&vars=tmpf&sample=1min&what=view&delim=comma&gis=no

Looks like Iowa St gets the 1-min data in within 2 days so we'll see.

I know it was 5 mins in 2011 because BOS had a raw minute of 104F in there surrounded by 103F and the high for the day went in as 103F.

I swear I remember it being 5 min unless it was changed.

@OceanStWx Can you get early access to the raw 1-min data?

However, the 5 min avg never got above 95F (6hr max at 1754z was 95F). And the temp spiked and triggered a SPECI at 1743z when it jumped from 86F to 93F in 3 minutes. So there must have been a few random big spikes thrown in there with normal 80-82F obs unless I have no clue what I'm talking about anymore.

Let's assume the real raw temp was 80F. The 1-min obs are 5-min means of the raw 1-min averaged temps. So to drop 11F in a minute it would require a delta of 55F change. So in theory 15F of it is on the 95 to 80 side, but you'd have to be losing an ob of +40F on the other end (135F). Am I missing something here?

There's no way this is your first heat wave there. None. I've had like 10 of them here.

Nothing from the Winthrop CWOP. https://www.weather.gov/wrh/timeseries?site=D3706&hours=24

Yeah something is wrong. To pull down a 5min mean from 95F to 84F in 1 minute requires a big number coming off and a low one going on.

Must be some swirlies in there. Back to 81F

100F on Hot Saturday

What do you mean by all-time? Daily record? Monthly? All-time all-time?

A boundary is through here. 86.3/64

90 to 82 in 10 mins at BOS