ChescoWx

On X today ABC Chief Meteorologist Ginger Zee answered a message I sent to her regarding the controversial NCEI temperature adjustments that have been made to the actual historical raw NWS Cooperative Data. Below is her response and a link with her "deep dive" report on the controversy. To be honest her report for the most part simply repeated the standard response saying "the science supports it" which is what you will always hear. For many folks with that answer from a professional meteorologist, they will simply nod their heads and say well if the science says it must be so. This in most cases will often stop any further questioning of the data. To Ginger's credit she agrees with my long-held stance in the video that science should always be questioned and evaluated. I certainly have questions and have to date not found any solid support for the consistent 2-to-3-degree chilling of the old data for every single year from 1895 through 2000. So, I will continue to question these adjustments. Science is always about questioning data not blindly following! https://t.co/e5CFYdO803 Below is my response to Ginger with the data to try and support any adjustments to the raw data. Thanks Ginger but you didn't get into the deeper detail as to the explanation for the changes made to not only the ASOS sites at Airports you mentioned but to the NWS Cooperative Observer Data. A case in point is the long running Coatesville 1SW NWS Cooperative Station data for the philly burbs of Chester County PA with data from 1894 through 1983. There are many reasons given for these post observation ad hoc adjustments. The most common are station moves and time of observation adjustments. Below shows that for this station NCEI chilled 86 of the 89 years between 1894 through 1982. Below are the station moves grouped by year. These were all within a couple miles in each case with annual clear consistent cooling adjustments applied to the raw data. The time of observation adjustment also is not relevant in this case as only for 11 years (1910-21) was the daily observation taken only in the evening. So how and why exactly was this particular station chilled so consistently across 97% of all years?

Another widespread freeze this morning across the area with our lowest Chesco climate station the 24.7 at the Warwick DEOS. We remain well below normal today with highs in the middle 50’s, but a nice warming trend kicks in starting tomorrow and we get very warm with low 80's possible by next Tuesday and Wednesday! We could use a little rain but nothing in sight over the next week.

Another widespread freeze this morning across the area with our lowest Chesco climate station the 24.7 at the Warwick DEOS. We remain well below normal today with highs in the middle 50’s, but a nice warming trend kicks in starting tomorrow and we get very warm with low 80's possible by next Tuesday and Wednesday! We could use a little rain but nothing in sight over the next week.

East Nantmeal broke it’s record low this morning with a low of 25.9. The old record was 27.8 set back in 2007. While a short-term record here since 2004 nowhere close to record across the county. The lowest reading I could find this morning was the 21.6 at our typical cold spot in Warwick Township. Another well below normal temperature day with highs struggling into to the low 50’s. Another freeze potential tonight before we start a slow warming trend to near normal temperatures by the weekend with highs in the low 60’s. We should see well above normal temperatures early next week before another cool down sets in by the end of next week. No real rain chances through the week.

East Nantmeal broke it’s record low this morning with a low of 25.9. The old record was 27.8 set back in 2007. While a short-term record here since 2004 nowhere close to record across the county. The lowest reading I could find this morning was the 21.6 at our typical cold spot in Warwick Township. Another well below normal temperature day with highs struggling into to the low 50’s. Another freeze potential tonight before we start a slow warming trend to near normal temperatures by the weekend with highs in the low 60’s. We should see well above normal temperatures early next week before another cool down sets in by the end of next week. No real rain chances through the week.

Some unseasonably cold temperatures through mid-week including a hard freeze tomorrow night into Wednesday morning. Temperatures will remain in the upper 40's which is a solid 10 degrees below normal for the date. We slowly modify to slightly above normal temperatures with highs in the mid to upper 60's by the weekend. Looking ahead to next week we should see a big warmup well into the 70's before another cool down back to below normal temperatures by late next week. Overall, a dry pattern throughout the period.

Some unseasonably cold temperatures through mid-week including a hard freeze tomorrow night into Wednesday morning. Temperatures will remain in the upper 40's which is a solid 10 degrees below normal for the date. We slowly modify to slightly above normal temperatures with highs in the mid to upper 60's by the weekend. Looking ahead to next week we should see a big warmup well into the 70's before another cool down back to below normal temperatures by late next week. Overall, a dry pattern throughout the period. Albedoman will not be pleased!

Happy Easter to all who celebrate! Many lower elevation spots reached the lower 80's yesterday. While higher spots remained below 80 degrees, we did set a record high for my East Nantmeal station yesterday breaking the old record from 2011 by almost 5 degrees. However, the Chester County record from 1963 of 84 degrees at West Grove was not reached by any of the record stations across the County. With our backdoor cold front temperatures have fallen below forecasted levels to well down into the 40's across the area. We may struggle to get much above 60 degrees today. We turn much chillier tonight with well below normal temperatures through Wednesday. There is the potential of a hard freeze by Wednesday morning. Shower chances are around today but dry for much of the upcoming work week.

Happy Easter to all who celebrate! Many lower elevation spots reached the lower 80's yesterday. While higher spots remained below 80 degrees, we did set a record high for my East Nantmeal station yesterday breaking the old record from 2011 by almost 5 degrees. However, the Chester County record from 1963 of 84 degrees at West Grove was not reached by any of the record stations across the County. With our backdoor cold front temperatures have fallen below forecasted levels to well down into the 40's across the area. We may struggle to get much above 60 degrees today. We turn much chillier tonight with well below normal temperatures through Wednesday. There is the potential of a hard freeze by Wednesday morning. Shower chances are around today but dry for much of the upcoming work week.

March 2026 finished as our 18th warmest March since 1894 here in Chester County PA. The top 5 warmest March months are below. I also have attached the average temperature trends for March since 1894. Blue is raw and Red in NOAA altered adjusted temperatures.

March 2026 finished as our 18th warmest March since 1894 here in Chester County PA. The top 5 warmest March months are below. I also have attached the average temperature trends for March since 1894. Blue is raw and Red in NOAA altered adjusted temperatures.

No warming or cooling is my point you miss - just typical cyclical normal climate changes FTW!!

We will finish March with our 1st above normal temperature month since way back in September. Every fall and winter month except September ended with below normal temperatures. Our seesaw temperatures typical of spring will continue over the next several days. We have a well above normal day today before we turn much chiller tomorrow. We warm again by Friday through the weekend before turning much cooler again to start the new work week. Rain chances to really ramp up tomorrow into Wednesday night.

We will finish March with our 1st above normal temperature month since way back in September. Every fall and winter month except September ended with below normal temperatures. Our seesaw temperatures typical of spring will continue over the next several days. We have a well above normal day today before we turn much chiller tomorrow. We warm again by Friday through the weekend before turning much cooler again to start the new work week. Rain chances to really ramp up tomorrow into Wednesday night.

bdgwx just keep on cherry picking - you will always get the anwer you want!!

Poor Cobalt!! Little does he seem to know.....

Cherry picking always gives the desired answer.....

To those that celebrate....welcome to Phillies Opening Day!! Go Phillies! It will be a beautiful spring day today with highs reaching the 70's. Shower chances increase tonight into tomorrow morning. Much colder tomorrow with temperatures falling during the day and falling below freezing tomorrow night. Saturday will be the coldest day of the weekend with highs barely escaping the 30's. We moderate back to near normal temperatures by Sunday. Go Phillies!!

To those that celebrate....welcome to Phillies Opening Day!! Go Phillies! It will be a beautiful spring day today with highs reaching the 70's. Shower chances increase tonight into tomorrow morning. Much colder tomorrow with temperatures falling during the day and falling below freezing tomorrow night. Saturday will be the coldest day of the weekend with highs barely escaping the 30's. We moderate back to near normal temperatures by Sunday. Go Phillies!!

Hi Jns, Attached is a link to my website with the site descriptions. They are a combination of NWS COOP / CRN / AWOS / DEOS stations. No Cocorahs are included - but I may in the future. Let me know if any other questions. Thanks! Paul https://chescowx.com/detailed-station-data/

Many climate alarmist like to point to the Time of Observation Bias (TOB) as solid "scientific adjustments" required to correct that bias. NOAA/NCEI in fact chose to chill every year at Coatesville from 1895 thru 1982. However, if anything when we look at the facts of when these observations were taken (see the below of COOP observation time/years) we see that with the exception of 11 years.... temperatures were in reality recorded in the morning. So if their rationale is correct the bias for Coatesville should in fact be too cool with all of those AM minimum temperature reports. Yet they chose to not warm those years - they actually made additional chilling adjustments.

Climate realist board....

We should be close to normal temperatures today (low to mid 50's) before a brief spike to well above normal for The Phillies Opener (upper 60's). Then back to below normal temperatures Friday through the weekend. Shower chances increase tomorrow night into Friday morning with a cold front.

We should be close to normal temperatures today (low to mid 50's) before a brief spike to well above normal for The Phillies Opener (upper 60's). Then back to below normal temperatures Friday through the weekend. Shower chances increase tomorrow night into Friday morning with a cold front.

Try consolidating your data you will find the story matches my above analytics.