ChescoWx

Finally got around to updating my analysis of PHL Airport average annual temperatures vs. the Chester County PA NWS COOP/AWOS and Mesonet sites for 1941 through 2024. The UHI impact at PHL becomes clearer with each passing year.

Here in Chester County PA Through yesterday 2025 is off to the coldest start in 31 years since that extremely cold January of 1994. Yet another very cold morning across the County this morning with 8 of our 18 current lower elevation station locations again reaching below zero levels. Most of these locations have had 3 such mornings in a row. We stay well below normal for the next 3 days before we warm to normal levels for late January by the end of this week and into early next week. We look to stay dry for at least the next week.

Here in Chester County PA Through yesterday 2025 is off to the coldest start in 31 years since that extremely cold January of 1994. Yet another very cold morning across the County this morning with 8 of our 18 current lower elevation station locations again reaching below zero levels. Most of these locations have had 3 such mornings in a row. We stay well below normal for the next 3 days before we warm to normal levels for late January by the end of this week and into early next week. We look to stay dry for at least the next week.

This morning was one of Chester County's coldest mornings in the last 31 years dating back to January 19, 1994. There were 7 stations this morning that recorded below zero readings. This includes 9.1 below zero at Warwick Township (station record 14 years of data) this was the coldest station reading in Chester County since the 11 below zero reading at Coatesville 2W in 1994. That day the 19th was also the only day in County history a station failed to get above zero for a high temperature. West Bradford / Marshallton also set a station record of 4.7 below zero breaking the old station record of 3.8 degrees below back on January 14, 2014. If you think we have had a long stretch of below normal cold you would be correct! Since Thanksgiving Day, we have seen below normal temperatures on 70% of 39 of those 56 days. This includes 25 of the past 33 days. The good news is we should finally see a return to near normal average temperatures by Sunday into early next week. We also look to stay dry for most of the next week. Stay warm!

This morning was one of Chester County's coldest mornings in the last 31 years dating back to January 19, 1994. There were 7 stations this morning that recorded below zero readings. This includes 9.1 below zero at Warwick Township (station record 14 years of data) this was the coldest station reading in Chester County since the 11 below zero reading at Coatesville 2W in 1994. That day the 19th was also the only day in County history a station failed to get above zero for a high temperature. West Bradford / Marshallton also set a station record of 4.7 below zero breaking the old station record of 3.8 degrees below back on January 14, 2014. If you think we have had a long stretch of below normal cold you would be correct! Since Thanksgiving Day, we have seen below normal temperatures on 70% of 39 of those 56 days. This includes 25 of the past 33 days. The good news is we should finally see a return to near normal average temperatures by Sunday into early next week. We also look to stay dry for most of the next week. Stay warm!

Euro has "measurable" for some this evening....

Most locations across Chester County experienced our coldest morning since January 31, 2019. Multiple stations fell to below zero with 2 stations Warwick Township 6.5 below zero and Devault 2.7 below setting all-time station low temperature records with NWS Mesonet data back to 2012. Other locations with sub-zero lows included Chester Springs 3.4 below (2nd coldest ever), West Bradford Township 3.5 below and West Chester 1.1 below. The warmest spot as always was the Brandywine West Chester Airport with a low of only 6.8 above. Our very cold weather continues all week before me finally moderate to above freezing by Sunday. Our next snow chance looks to be toward next Monday.

Most locations across Chester County experienced our coldest morning since January 31, 2019. Multiple stations fell to below zero with 2 stations Warwick Township 6.5 below zero and Devault 2.7 below setting all-time station low temperature records with NWS Mesonet data back to 2012. Other locations with sub-zero lows included Chester Springs 3.4 below (2nd coldest ever), West Bradford Township 3.5 below and West Chester 1.1 below. The warmest spot as always was the Brandywine West Chester Airport with a low of only 6.8 above. Our very cold weather continues all week before me finally moderate to above freezing by Sunday. Our next snow chance looks to be toward next Monday.

With yesterday's snow which totaled 5.3" (w.e. 0.43") we are now up to 11.7" for the month of January through yesterday. This is 7.4" above our normal snow to date. For the winter season we stand at 14.5" of snow which is 3.7" above normal through yesterday. There is a cold weather advisory in effect through noon on Wednesday. Temperatures today will struggle to reach 20 degrees - while tomorrow and Wednesday will see highs in the mid-teens. Low temperatures the next 3 nights will be within a few degrees of zero. We start a slow moderating trend on Friday and may finally see temperatures rise to above freezing by next Sunday.

With yesterday's snow which totaled 5.3" (w.e. 0.43") we are now up to 11.7" for the month of January through yesterday. This is 7.4" above our normal snow to date. For the winter season we stand at 14.5" of snow which is 3.7" above normal through yesterday. There is a cold weather advisory in effect through noon on Wednesday. Temperatures today will struggle to reach 20 degrees - while tomorrow and Wednesday will see highs in the mid-teens. Low temperatures the next 3 nights will be within a few degrees of zero. We start a slow moderating trend on Friday and may finally see temperatures rise to above freezing by next Sunday.

5.0" of snow so far still light snow here in East Nantmeal. Temp 22.2. Month to date 11.4" of snow +7.1" above normal to date. Season to date 14.2" which is 3.4" above normal.

As of 830pm 5.0" of snow at East Nantmeal Township Chester County PA

As of 7pm 4.3" if snow here in East Nantmeal....moderate snow still falling and 23.3 degrees,,,,,we are now at 13.5" of snow this season which is 25% above our normal snow through today!

As of 7pm 4.3" if snow here in East Nantmeal....moderate snow still falling and 23.3 degrees,,,,,we are now at 13.5" of snow this season which is 25% above our normal snow through today!

4.3" so far here in East Nantmeal still moderate snow and 23.7 degrees

S+ again here in NW chesco might make low end of 4" snowfall!

Snow Globe here in NW Chesco

Heaviest snow I have seen in a few years here in Chester County just incredible! - wind increasing temp down to 27.5

S+ here in NW Chester County with more incoming....roads are totally snow covered temp down to 28.1 and winds are picking up

Snowing moderately again all surfaces covered with next round temp down to 29.6. Looks like more gaps in the snow to our southwest. Will we get to low end of the forecast?

Up to 0.5" so far here in East Nantmeal with dry slot approaching temp down to 30.5

Coming down heavily now temp at 31.3 - driveway starting to cave

Snow has really picked up in intensity over last few minutes here in NW Chesco temp has slipped to 32.0

Some heavier snow starting to develop across the area 33.0 degrees here in EN

Couple flakes falling temp 34.0 RH 78% DP 28.0