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Upslope not nearly as big factor this time of year, simply b/c low-level winds from the SE, E, or NE are not as strong, and fetch is much less. Ever notice summer low pressure areas are smaller than the cool season counterparts? Well, there is reason for that and thus you can't treat things synoptically all the same in the summer. Convection plays a much larger role in the summer, so that messed w/ things are well. Swaths from training regardless of topography.
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'Only' 1.57" here, 11.41" for the month.
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E PA/NJ/DE Summer 2026 Obs/Discussion
Hurricane Agnes replied to PhiEaglesfan712's topic in Philadelphia Region
I finished up with 0.39" yesterday after a couple rounds (2-day total 1.29"). Currently a misty 68 with dp 68. -
2.1
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2026-2027 Super El Nino
snowman19 replied to Stormchaserchuck1's topic in Weather Forecasting and Discussion
As expected: -
Picked up 1.8" here from the overnight rains, july monthly total at 7.25" now
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Chester County PA - Analytical Battle of Actual vs. Altered Climate Data
chubbs replied to ChescoWx's topic in Climate Change
Extended the stat analysis to the 1970s to include the West Chester move. Two comparisons were made: individual years using 1972 minus 1945 as a metric, and a 5-year average using 1971-75 minus 1941-45 as a metric. The results are the same for both metrics: the Chester County COOPs are significantly different statistically from the non-Chesco stations. As was the case for the 1950s there is no overlap between the move and non-move stations. The Chester County COOPs have spurious cooling of over 2F. This analysis and the one above provide strong evidence that the larger NCEI bias adjustments are very robust statistically. This analysis also shows the problems with AI. As Don stated above AI is handy for an initial screening; but, AI is unlikely to give a complete and accurate answer to a complex problem. - Today
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The biggest totals will be west of them I think. I saw a lot of talk from many around here on TV about upslope and all that probably because hi res love to treat every 500’ hill as the Sierra. But it’s all about convergence as we spoke about. That area getting crushed is downsloped on SE flows. Atmosphere don’t care when there is a good convergence zone and moisture conduit off the deck.
