It has been a wild start to the Memorial Day weekend with an unusual storm system over the Northeast which brought rain, snow and cold. This system has been very unusual and even unprecedented for late May, rewriting the history books with incredible Adirondack and northern New England snow totals for late May.Whiteface Mountain, NY has seen an unprecedented 18 INCHES of snow while Mount Mansfield, Vermont recorded it’s biggest snow, so late, on record with 7.5 inches accumulating and there are many areas above 2,000ft with at least a trace if not a few inches across NY, VT and NH, possibly down into MA too.

Both Syracuse and Binghamton, NY recorded a trace of snow which makes this the latest on record.

As well as the snow, rainfall has been prolific also with 4-8 inches of rain falling across parts of New England with Vermont hit hardest by over a month and in some cases, two month’s worth of rain within just 5 days.

The low spinning over the region has drawn warm, moist air in off the Atlantic which produced the biggest rain totals but on the low’s backside, unusually cold air was pulled down from Canada, that allowed the precipitation to fall as snow.

Here’s the snow cover/depth chart over New England. You don’t see this very often on May 26th.

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Here was the scene Saturday at Whiteface Mountain looking more like late January rather than late May.

While for some areas and I believe Whiteface can be included as well as Mt Mansfield, this weekend’s event will go down in history as the biggest snowfall so late in the year, however it has snowed even later. As recently as June 1, Maine reported snow flakes flying but no accumulation from what I could see.

It’s snowed several times in June and as late as the 17th in Maine believe it or not. Even take Mt Mansfield where it’s seen 7.5″ in the past 36 hours. Yes this is the biggest accumulation so late but it’s not the latest snow, it’s snowed as late on here as June 13th. I just wanted to keep some perspective that although this is pretty exceptional and historic for several Northeast sites, this is not unprecidented regionwide.

Check out these record lows and record low maximum’s from yesterday (Saturday) produced by my twitter follower @WeatherNut27

These are some very significant cold records. Most if not all say that yesterday was the coldest if ever been at these sites this late in the year.

Another unseasonably cold night is on the way for the interior East with the area of 32 or below focused from southwest New York down across western PA, western MD and along the WV-VA border. Although cold, it’s not quite as bad as you might expect up in New England but that’s probably because snow will mix with rain at 1,500-2,000ft with more snow perhaps accumulating above 3-3,500ft. Tomorrow night may be the coldest for the areas which have and are seeing snow still.

Here’s the GFS forecasted low temperatures by Monday morning.

Here’s tomorrow night.

As I stated now throughout last week, following this cold and messy weekend across the Northeast, major heat will build over the Plains and migrate east. By Thursday if not Friday, the DC to Boston corridor will be knocking on the door of 90 and I suspect each of these cities will be sweating away at between 91-93 degrees with dew points in the 60s. As well as it being the first major heat of the year, we’re going to see classic warm, muggy nights with lows getting merely down into the low 70s.

Summer swelter is coming….

Here’s the GFS for Friday afternoon.

10 Inches Of Rain In San Antonio Brings Major Flooding, Kills 2

The other big story this weekend is the massive flooding seen across the San Antonio area of Texas. Around 10 inches of rain fell yesterday which makes for the 2nd biggest single-day rainfall in city history and of course all this rain falling within such a short period of time caused major flooding. Unfortunately 2 have died and hundreds had to be rescued, many from the roofing of their house as water rose nearly to the roof edge.

According to a San Antonio newspaper, nearby Olmos Dam recorded an unofficial 17 inches of rain within 24 hours.

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Tags: May 25th snow, May snow, Memorial Day weekend snow, Memorial weekend snow, New England May snow, record snow