TheClimateChanger

For the record, this analysis is based on the mean maximum temperature. I have been told in the past that it is the low temperatures making the summers warmer and that people judge summer months based on maximum temperatures. With the drought causing unusually large diurnal ranges, I thought maximum temperatures would probably be more appropriate for 2024.

Record watch starting again for June. Looks like some locations may see their warmest June on record. At Toledo, the mean maximum for the month stood at 84.1F through yesterday, which would be tenth warmest. With today's 95F factored in, the mean has climbed to 84.6F, placing it in a tie for ninth place. Based on the NWS forecast maximum temperatures, the monthly mean may climb to around 86.2F by the 27th. The current record is 85.9F, set in 1934 & 2005.

Sounds like Saturday is going to be a scorcher. 25th percentile NBM temperatures in the mid 90s, with H85 temperatures climbing to 22-24C. 75th-90th percentile temperatures must be pushing triple digits. Record highs are 95 for tomorrow, and 98 for Saturday (also the monthly record). Record max lows are 73F and 75F, respectively. The upper ridge will then begin to retrograde slowly on Saturday but still hold strong enough for one more day providing a continuation of the dangerous heat, and perhaps the hottest day with even the NBM 25th percentile suggesting mid 90s. Ensemble 850 mb temperatures still remain in the 22-24C range. Some records may be challenged. Due to the compounding effects, continued heat indices at and above 100 degrees, and the WPC heat risk tool showing major to extreme impacts, the heat headlines remain in effect through Saturday. That said, as with the past several days, some subtle weaknesses in the flow as the ridge axis pulls south could allow for isolated to scattered afternoon convection to throw wrinkles in the heat, but predictability in coverage and location is low probability at this time range.

000SXUS71 KPBZ 202007RERDUJRECORD EVENT REPORTNATIONAL WEATHER SERVICE PITTSBURGH PA406 PM EDT THU JUN 20 2024...RECORD HIGH TEMPERATURE SET AT DUBOIS...A RECORD HIGH TEMPERATURE OF 91 DEGREES WAS SET AT 3:53 PM EDT TODAY AT DUBOIS. THIS BREAKS THE OLD RECORD FOR JUNE 20TH OF 89 DEGREES SET IN 1991. THE TEMPERATURE MIGHT RISE FURTHER AND THIS RECORD REPORT WILL BE UPDATED IF NEEDED. THIS TEMPERATURE IS JUST 1F BELOW THE JUNE RECORD THAT WAS TIED ON JUNE 18, 2024. IN ADDITION, THE LOW THIS MORNING WAS 67F. THE RECORD WARM LOW TEMPERATURE FOR JUNE 20TH IS 66F SET IN 1996. SO UNLESS A THUNDERSTORM FORMS NEARBY AND COOLS THE TEMPERATURE BELOW 66F BEFORE MIDNIGHT, ANOTHER RECORD WOULD BE SET. $$CRAVEN

Up to 91F at the airport. My home station is baking but I think it gets heat from the balcony rail I have it installed on. Might still reach a respectable 92 or 93 officially today. I still think Saturday will probably wind up being the hottest day of this stretch. Should at least tag an official 3-day heat wave today through Saturday, with Sunday being a toss-up at this point. This area does seem to perform better directly ahead of the cold front, so I think if convection can hold off, we should be able to do it.

Site elevation is a big factor in that. A lot of Chester County is several hundred feet higher to as much as 1,000 feet higher in the hills. Would expect most places to be at least a couple degrees cooler to as much as 4-5 degrees in the highest elevations in the northern part of the county. PHL airport is basically at sea level.

Lots of red and brown out there. Just the way it ought to be in July. Even East Nantmeal might manage a couple of 90s.

Looking solid.

Should be able to reach 90 or 91. It’s already reached 87 or 88, and it’s quite a bit brighter than yesterday when it reached 89F. Still variable cloud cover, so one of those days if you get an extended intrahour sunny interval, it can shoot up a couple degrees then drop back.

Mount Washington Weather Archives - Mount Washington Observatory All the same extremes back to 1933, on the observatory archive.

xMacis only has the observations dating back to 1948. Not sure if anything higher was recorded prior to 1948.

Maximum of 70F yesterday at Mount Washington. 2 below the highest of record in June and all-time, since 1948. June All-time The minimum of 59F on the 18th was the highest of record since 1948 in the month of June and 1F below the all-time maximum. The minimum of 58F yesterday would have matched the previous monthly high. June All-time

While the current warm spell may have been a bit of a letdown thus far, it does appear increasingly likely that we see the warmest June on record at Pittsburgh International Airport, and a top ten warmest June in the threaded record. The number to beat at the current location is 73.0F from 1967. To get into the top ten overall, we would need a mean of 73.3F. There is a decent chance that it will be our warmest June overall since 1943, when the mean temperature was 74.5F. I estimate the mean should increase to around 72.9F through the 26th (based on current forecast) with continued warmer than normal weather likely thereafter.

Your car thermometer sensor is like a foot or so above black asphalt. I’m assuming that has more to do with this observation than “urban heat island” effect.

Looks like we’re going to be 89’d again like Sunday. Meanwhile, an all-time record of 96F in Caribou, Maine. Add northern Maine to the list of places that do heat better than Pittsburgh.

Yes, albeit many of the other local sites have reached 100+ due to slightly higher dewpoints. Almost impossible to reach official EHW criteria in the month of June at the airport. Only happened once since 1945 - June 27, 1978. The high that day was "only" 93F, so dewpoint readings must have been in the upper 70s to get that high of a heat index. Didn't even reach 105+ during 1994 or 1988, as humidity was relatively modest. I suspect NWS upgraded to EHW just due to duration and recognizing some of the lower elevation locations and the city probably have heat indices 2 or 3F warmer than the official values. Maybe we get closer later in the week or on Saturday.

The official temperature is taken to the nearest tenth of a degree in Celsius, and then converted to Fahrenheit (and rounded to nearest whole degree). The five minute observations read only to the nearest whole degree Celsius before the conversion, so due to rounding it can often be +/- 1F of what is shown. On sky cover, the METAR is augmented by a contract observer. The ASOS ceilorometer (sp?) only reports cloud cover at or below 12,000 feet. If the cloud deck is above that level, as it is this morning, the ASOS will report clear skies (which really only means clear skies below 12,000 feet). Also sometimes, it can miss some isolated lower clouds so you might see the ASOS report clear when it really should be something like FEW040 (a few clouds at 4,000 feet). None of the other ASOS or AWOS sites are augmented, so that's why PIT will often report much more substantial cloud cover than the other smaller local airports.

Quite cloudy and hazy today. Probably going to be a slower climb today. Should still reach 90+ with the high starting point.

I don’t think we do it. Tomorrow looks subtly cooler aloft. Probably 91 or 92. Maybe Thursday to Saturday, which looks warmer. Might manage an official 95 or 96 during that stretch.

Inside? What is it inside? A greenhouse?

High was at least 92 at KPIT. Probably 93 or 94, based on 5 minute data. Multiple observations of 34C/93F, but that could be between 33.5C and 34.4C [92.3-93.9F].

Bradford reached at least 90F today, marking only the third time it has reached at least 90F in the month of June since records began in 1957. The other two occasions were both in 2022: 90F on the 16th; and 93F on the 22nd.

Wow, international! It's been upgraded? Where are they flying to internationally?

Anyways, I wouldn't get too worked up over one reading from 1936. The same people who blab on about "it's only summer" and cry about the shading color of the weather map would be saying the same thing about that summer. And, to be quite honest, I think they would have a point. They say it's the hottest summer on record, but this looks like a summer of yesteryear to me (outside of a 1-week hot stretch). June 1936 Central Park Weather Bureau Office July 1936 Central Park Note: Excluding the 7 days from July 8 to July 14, the means are 83.1F/64.5F and 73.8F average for the other 24 days. Weather Bureau Office August 1936 Central Park Weather Bureau Office