ChescoWx

Rain will end this AM. We have picked up 1.51" of rain and melted snow so far along with the 0.3" of snow/sleet yesterday. Of note with this event we have now exceeded our normal annual rainfall here in Chester County of 50.21". It looks likely we will now have colder than normal weather to close out 2022. The exception could be if the east coast storm next week tracks like the latest European model is showing. In that case we would have a brief warmup and change any brief snow to rain next Thursday into Friday. The models will change again many times before then. The record high for today is 67 degrees set in 1971. The record low is also the earliest seasonal record of a below zero reading as on this date in 1917 we fell to 1 degree below zero. Record rain is the 1.80" today in 1902. Our record snow was just 2 years ago when we received 7.3" of snow.

Still raining so far 1.51" of rain and 0.3" of snow from event

Suspect many on this forum would sign up for the 12z GFS if you wish for our 1st White Christmas in 10 years

Still moderate ZR here in NW Chesco temp up to 31.7 - evergreens a bit droopy with some ice accretion

Starting to change to all freezing rain - 90% ZR and 10% IP temp up to 29.9 Just measured 0.3" of sleet/snow here in East Nantmeal

Remember the GFS is famous for suppression of east coast snow events...often up till 3 days before the event.

Snow starting to mix back in with the moderate sleet looks like this will be our 1st measurable snow/sleet of the season. All surfaces covered temp at 29.8

Over 30 accidents now reported on the Route 30 Bypass here in Chester County. Still snow and sleet mix all surfaces coated with a temp down to 29.9

A mix of snow and sleet has started here in NW Chesco in East Nantmeal Township with 30.1 degrees DP 22.8

Overall means show increasing chances of our 1st White Christmas since 2012. Either way it will be cold!!

Another chilly day today before clouds increase and snow and or sleet begin right after rush hour tomorrow morning. The NWS has a Winter Weather Advisory up for the area...but still some differences in forecasted snow totals. Best bet is up to 1" of snow....with more the further north and west you go. We should then see a quick change over to a wind swept heavy rain by early afternoon. Stay tuned for later updates. The record high for today is 65.3 degrees from 2015. The record low is the 4 above zero from 1989. Daily rain record is 2.06" from 1897. Daily snow record is the 8.7" that fell today in 1917.

The NAM for now has the low actually almost going right up the GS Parkway. If verification is a move 25 miles east - I would tug that thump of early accumulating snow down a bit into Chester County.....now if it is 25 miles further inland....really quick turn to rain. Either way rain should wash any accumulations away as far North as Tamaqua

My current idea IP to rain - Delaware and Eastern Chester 0.5" to 1.0" - Western Chester and Western Montgomery Counties 2-4” Northern Bucks and Lehigh Valley 5"-9” Poconos 7"-11" NE PA

Dry the next 2 days with slightly below normal temps in the upper 30's for highs across the County. Clouds will increase with snow arriving Thursday AM...we should see a quick turn over to rain from southeast to northwest during the mid-morning hours. Up to an inch of snow is the current early NWS forecast. Some models have up to 3" for NW sections of Chester County but we don't shovel models. The record high for today is 69.7 set in 2015. The record low is 2 above zero from 1988. Record rainfall is the 4.21" that fell back in 1909. Daily snow record is 6.8" from 1915.

Dry and seasonably chilly start to the work week through Wednesday. It looks like a major storm will impact the area with our first nor'easter of the season starting on Thursday. As always the exact track of the storm will determine how much if any snow or ice we get before any change to rain. The record high for today is 69 degrees from 2015. Our record low is 2 degrees above zero set in 1988. The rain record is 1.98" from 1993. Our daily snow record is the 3" from 1916.

I thought I would post the analysis of White Christmas chances for the Philly burbs of Chester County PA. We have about a 26% chance of at least 1" of snow on the ground come Christmas morning.

A chilly light rain is falling this morning across much of Chester County. Up to 0.25" of rain could fall in some spots today. Clearing tonight and then dry through Wednesday. It looks snow may arrive on Wednesday night into Thursday morning. However, models today now show a pretty quick change to rain...but as we have said expect models to bounce around a bit before we get some consensus by mid-week. The record high for today is 68 degrees from way back in 1897. The record low is 2 above zero from 1968. The daily rain record is the 1.95" from 2002. Record snow is the 9" that fell today back in 1960.

Just to keep it real - we are far from snow starved based on climatology. While last year was a below average 20.5" of snow for Chester County the prior winter we received 52.2" of snow - well above our normal snowfall in at least the western Philly burbs of 36" - combined the last 2 years we are spot on average! Also we have averaged above normal precipitation over the last 4 straight years.

Nice December day today with slightly below normal temps. Chance for some light snow developing toward daybreak on Sunday changing to rain during the morning and ending mixed with snow again during the evening. Dry and chilly during the mid-week before snow chances increase with some potential for a significant storm starting on Wednesday night into Thursday. Details of course TBD but something to watch and we will during the week. The record high for today is 70 degrees set in 1946. The record low is 1 degree above zero set today in 1910. Our daily rain record is the 1.90" from 1952. Daily snow record is the 5.9" that fell in 1904.

Euro with over a foot in some spots of Bucks and Lehigh counties - see above...of course just a model run but close

As we track model snow totals for the season - here is our 1st nice weenie map between now and Christmas Eve.

We are starting a pattern today of seasonably cold temperatures that should last through much of the holiday season. In addition there will be multiple chances of rain and snow every few days during this stretch. The first such chance will be with some snow possibly arriving by Sunday AM changing to rain. More mixed wintry precipitation could arrive Wednesday night. The latest US Model (GFS) hints at a major snowstorm by next weekend....but we don't shovel models! The record high for today is the 71 degrees from 1966 (during the following 3 weeks almost 3 feet of snow would fall including over 20" with lightning on Christmas Eve 1966) The record low for today is 6 degrees from 1989. Record rain is the 1.80" from 2009. Our record snow was the 7.8" that fell today in 2005.