Jump to content

*** PLEASE REGISTER AND JOIN OUR DISCUSSION!!! ***

THE STAFF WANT YOU TO JOIN US AT PHILLYWX!!!

Register as a member today, and become part of the Delaware Valley weather community!

Our pro and seasoned amateur meteorologists, and weather enthusiasts from around the PA and NJ area together form a great group discussion, and we're asking folks that read our site today to register as members and post along with us!

Don't be intimidated if you're not an expert, ask questions if you're curious or want to build your knowledge!

Whether it's adding to our local profiles by reporting observations (and maybe becoming a SkyWarn Spotter!), or contributing more on the model interpretation side, we'd like you to join us in a constructive and insightful dialogue around all things Philly Weather!


Leaderboard


Popular Content

Showing content with the highest reputation on 12/23/2018 in all areas

  1. 2 points
    With a little snow possible on Christmas Eve morning I thought I would go back and review the Christmas snow history for Chester County PA (1894 to Present) if you have your local data please post it here. Here in Chester County we have a 1 year of every 4 or 25% chance of having snow on the ground on Christmas Day with the most recent being last year when 0.3" was on the ground. Now for my records I am only counting days that had at least 1" of snow on the ground on Christmas Day. The greatest snow depth recorded on Christmas was the 25" of snow on the ground Christmas Night following a 21.2" storm including lightning and thunder that began Christmas Eve. this followed the 8.8" that fell earlier that week on the 20th. The next snowiest Christmas was from a storm that began at 8am on Christmas day back in 1909 and continued into the next day ending at 6:30am on the 26th (for both of these events I have attached the coop reports including W.T. Gordon's note that is was "snowing furiously and very deep snow" in 1909. Of note this snowstorm also represents our 2nd greatest individual snowstorm in County history as 38" had accumulated by the time it ended. The only greater snowstorm in our history was the 3 day Blizzard of February 12-14, 1899 when a whopping 45.3" of snow fell with temps mainly in the single digits during the storm duration. The coldest Christmas Eve and Day occurred back in 1980 when the morning lows both days were below zero with the 24th at 2 below and Christmas Day at 6 below zero. Of interest just 3 years later in 1983 we also had below zero Christmas Eve and Christmas Day with lows of 1 below and 3 below respectively. That Christmas Day in 1983 was also the coldest Christmas Day with a high of just 6 degrees above zero. By contrast the warmest Christmas Eve was just 3 years ago when we recorded a high temp of 68.5 in 2015 the next day Christmas was also mighty toasty with a high of 66.7 but a tick behind the 67 degree reading from 1964. The wettest holiday was the 1.63" that fell on Christmas Eve 1986 and the 1.92" that fell on Christmas Day 1967. No matter your weather I hope all of you have a Merry Christmas!! All the best, Paul Dec 1966 obs.pdf Dec 1909 obs.pdf
  2. 1 point
    On wiki i pulled this...from the 1883 eruption: In the year following the 1883 Krakatoa eruption, average Northern Hemisphere summer temperatures fell by as much as 1.2 °C (2.2 °F).[11] Weather patterns continued to be chaotic for years, and temperatures did not return to normal until 1888.[11] The record rainfall that hit Southern California during the water year from July 1883 to June 1884 – Los Angeles received 38.18 inches (969.8 mm) and San Diego 25.97 inches (659.6 mm)[12] – has been attributed to the Krakatoa eruption.[13] There was no El Niño during that period as is normal when heavy rain occurs in Southern California,[14] but many scientists doubt that there was a causal relationship The Krakatoa eruption injected an unusually large amount of sulfur dioxide (SO2) gas high into the stratosphere, which was subsequently transported by high-level winds all over the planet. This led to a global increase in sulfuric acid (H2SO4) concentration in high-level cirrus clouds. The resulting increase in cloud reflectivity (or albedo) reflected more incoming light from the sun than usual, and cooled the entire planet until the suspended sulfur fell to the ground as acid precipitation.[16]
  3. 1 point
    I wish it were Thanksgiving, sad this tme of year will be over already. It just started.
  4. 1 point
    Don't you all think I should be placed atop The forum leaderboard for this post?
  5. 0 points
×