ChescoWx Posted December 22, 2013 Share Posted December 22, 2013 Ray, Actually that 62 was not the high on 12/22/71 it was actually 12/21/71 - for a number of years the Coatesville reports made a mistake in reporting by actually reporting one observation for the previous 24 hours from the time of reporting for that date it was 730am (if you look at the manual form from that date you will see what happened) I found this out about 15 years ago when I first analyzed the data - that was the period when the Philadelphia Electric Company took over the obs they would simply report with the AM report the previous 24 hours high and low precip/snow etc. The US Dept of Commerce Weather Bureau seemed to recognize the problem for the first 2 months of reports (Feb/Mar 1946) from the Electric Company and made up arrow notes to reflect the actual was a day in arrears. If you want to see the best example of the reporting issue (although many others are clear) take a look at the famous Christmas Eve snowstorm at OBS from 1966. The Electric Company reported 20.0" of snow falling on Christmas day....when as we all know the actual snow occurred on Christmas eve. This was eventually corrected so I had to go back and painfully adjust all the "post day" reports in my database when I discovered the error....not sure if the NWS database has ever corrected for this error? Paul Coatesville 1 SW was 62 on 12/22/1971. Also, Phoenixville 1E was 63 on 12/22/1998. Link to comment Share on other sites More sharing options...
famartin Posted December 22, 2013 Share Posted December 22, 2013 Ray, Actually that 62 was not the high on 12/22/71 it was actually 12/21/71 - for a number of years the Coatesville reports made a mistake in reporting by actually reporting one observation for the previous 24 hours from the time of reporting for that date it was 730am (if you look at the manual form from that date you will see what happened) I found this out about 15 years ago when I first analyzed the data - that was the period when the Philadelphia Electric Company took over the obs they would simply report with the AM report the previous 24 hours high and low precip/snow etc.. If you need the best example (although many others are clear) take a look at the famous Christmas Eve snowstorm at OBS from 1966. They reported 20.0" of snow falling on Christmas day....when as we all know the actual snow occurred on Christmas eve. This was eventually corrected so I had to go back and painfully adjust all the "post day" reports in my database when I discovered the error....not sure if the NWS database has ever corrected for this error? Paul That's not a mistake; that's how COOP's are supposed to report. If a COOP is scheduled to report at 7AM, then that's when their 24-hour observation is. A majority of COOPs remain morning reporters, so most still have this "discrepancy" with the reported highs actually occurring on the previous calendar day. Link to comment Share on other sites More sharing options...
ChescoWx Posted December 22, 2013 Share Posted December 22, 2013 Actually most of the data in my dataset had for the most part multiple and at least 2 obs per day - and this was the actual day of record. That said I found the "problem" with COOP reports and adjusted all of those taken to truly reflect records for that actual calendar day....it was not easy to do but I wanted to be as complete as possible. I do try to be accurate!! That's not a mistake; that's how COOP's are supposed to report. If a COOP is scheduled to report at 7AM, then that's when their 24-hour observation is. A majority of COOPs remain morning reporters, so most still have this "discrepancy" with the reported highs actually occurring on the previous calendar day. Link to comment Share on other sites More sharing options...
famartin Posted December 22, 2013 Share Posted December 22, 2013 Actually most of the data in my dataset had for the most part multiple and at least 2 obs per day - and this was the actual day of record. That said I found the "problem" with COOP reports and adjusted all of those taken to truly reflect records for that actual calendar day....it was not easy to do but I wanted to be as complete as possible. I do try to be accurate!! Yes, I see that on the Coatesville forms. However, that was not necessary after the specific hour temps were removed from the forms; COOP instructions specifically state: "Time of making observatoins - But one observation in each 24 hours is necessary on the part of cooperative observers" Link to comment Share on other sites More sharing options...
famartin Posted December 23, 2013 Share Posted December 23, 2013 Snow showers later tomorrow? Especially north of PHL? Maybe the ground might be whitened a little for Christmas morning... Link to comment Share on other sites More sharing options...
KamuSnow Posted December 23, 2013 Share Posted December 23, 2013 Snow showers later tomorrow? Especially north of PHL? Maybe the ground might be whitened a little for Christmas morning... Sign me up! (even though we're pretty much due west of the airport) Link to comment Share on other sites More sharing options...
ChescoWx Posted December 23, 2013 Share Posted December 23, 2013 0.93" of rain since yesterday here in NW Chesco with 0.83" so far today Temp slowly falling from early AM high of 57.6 now at 45.5 Link to comment Share on other sites More sharing options...
chubbs Posted December 24, 2013 Share Posted December 24, 2013 After the recent torch phl is now 1.3F above normal for December Link to comment Share on other sites More sharing options...
Quakertown needs snow Posted December 24, 2013 Author Share Posted December 24, 2013 Link to comment Share on other sites More sharing options...
famartin Posted December 24, 2013 Share Posted December 24, 2013 After the recent torch phl is now 1.3F above normal for December Impossible, JB said it was going to be cold! Link to comment Share on other sites More sharing options...
ChescoWx Posted December 24, 2013 Share Posted December 24, 2013 Here in East Nantmeal we are +0.9 above normal - expect with the next week we should fall back below normal for yet another below normal month in this cold 2013! After the recent torch phl is now 1.3F above normal for December Link to comment Share on other sites More sharing options...
KamuSnow Posted December 24, 2013 Share Posted December 24, 2013 Merry Christmas to you too Andy, and to everyone here. Link to comment Share on other sites More sharing options...
Sophisticated Skeptic Posted December 24, 2013 Share Posted December 24, 2013 0.80 fresh snow on the ground, and still coming down good. where's all the hype...? Link to comment Share on other sites More sharing options...
chubbs Posted December 24, 2013 Share Posted December 24, 2013 Flurries/snow shower - 35F Link to comment Share on other sites More sharing options...
ChescoWx Posted December 24, 2013 Share Posted December 24, 2013 Nice little squall here in NW Chester County ground is whitening up a bit Temp down to 32.3 Link to comment Share on other sites More sharing options...
RedSky Posted December 24, 2013 Share Posted December 24, 2013 Snow squall in progress! Merry Christmas to all Link to comment Share on other sites More sharing options...
Animal Posted December 24, 2013 Share Posted December 24, 2013 some decent squalls around aston pa. Link to comment Share on other sites More sharing options...
Pohopoco Posted December 24, 2013 Share Posted December 24, 2013 Just when I had pretty much given up hope of a White Christmas,along comes a old-timey squall,w/ wind driven powder(1"+,grass covered)...Everything's White again,Everything's right again...24 dgs...Hope a squall comes to you all too,anyway; Hope You All Have a Meaningful + Merry Christmas!!! Link to comment Share on other sites More sharing options...
Quakertown needs snow Posted December 24, 2013 Author Share Posted December 24, 2013 heavy snow shower here, ground is getting white Link to comment Share on other sites More sharing options...
RedSky Posted December 24, 2013 Share Posted December 24, 2013 Whiteout conditions!! Link to comment Share on other sites More sharing options...
snowlurker Posted December 24, 2013 Share Posted December 24, 2013 Flurries in Middletown DE two years in a row now. Link to comment Share on other sites More sharing options...
RedSky Posted December 24, 2013 Share Posted December 24, 2013 That was a heck of a surprise looked out to blowing whiteout conditions only lasted a few minutes made everything white HRRR for the win Snow on consecutive christmas eve's are you kidding me Link to comment Share on other sites More sharing options...
_AR_ Posted December 24, 2013 Share Posted December 24, 2013 I thought this would be a brown christmas with some residual piles, but it looks like it may turn out to be white after all these squalls move through! Link to comment Share on other sites More sharing options...
famartin Posted December 24, 2013 Share Posted December 24, 2013 Nice squall but already done Link to comment Share on other sites More sharing options...
Sophisticated Skeptic Posted December 25, 2013 Share Posted December 25, 2013 1.6" and still snowing lightly ! mostly lake effect'ish from here on out though. elevation dependent. still could end up with more of a surprise by morning. Link to comment Share on other sites More sharing options...
RedSky Posted December 25, 2013 Share Posted December 25, 2013 Snow squall zeroing in on Trenton, heard santa's right behind that one Link to comment Share on other sites More sharing options...
Absolute Humidity Posted December 25, 2013 Share Posted December 25, 2013 Picked up a quick car grass topper here. Link to comment Share on other sites More sharing options...
Absolute Humidity Posted December 25, 2013 Share Posted December 25, 2013 Too bad that impressive band over Mercer Middlesex is going to miss me by like 1 mile or so. Someone is going to get an inch out of that: Link to comment Share on other sites More sharing options...
stemwinder Posted December 25, 2013 Share Posted December 25, 2013 A good coating on my balcony - W Windsor at Princeton border. Going SE, by radar. Link to comment Share on other sites More sharing options...
SP Posted December 25, 2013 Share Posted December 25, 2013 Solid two inches at the cabin. Elevations squeezing out that moisture!! Pocono white Christmas has been delivered. Back to the cognac......... Link to comment Share on other sites More sharing options...
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