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riding the HRRR and RAP

Drive up to Aroostook a couple days after…the ice on the way up was immense in central areas. And yes, that’s why we went up…the northern part of the county was buried. It was a scene for sure.

https://news.ucar.edu/14009/snowfall-measurement-flaky-history Earlier in our weather history, the standard practice was to record snowfall amounts less frequently, such as every 12 or 24 hours, or even to take just one measurement of depth on the ground at the end of the storm. You might think that one or two measurements per day should add up to pretty much the same as measurements taken every 6 hours during the storm. It’s a logical assumption, but you would be mistaken. Snow on the ground gets compacted as additional snow falls. Therefore, multiple measurements during a storm typically result in a higher total than if snowfall is derived from just one or two measurements per day. That can make quite a significant difference. It turns out that it’s not uncommon for the snow on the ground at the end of a storm to be 15 to 20 percent less than the total that would be derived from multiple snowboard measurements. As the cooperative climate observer for Boulder, Colorado, I examined the 15 biggest snowfalls of the last two decades, all measured at the NOAA campus in Boulder. The sum of the snowboard measurements averaged 17 percent greater than the maximum depth on the ground at the end of the storm. For a 20-inch snowfall, that would be a boost of 3.4 inches—enough to dethrone many close rivals on the top-10 snowstorm list that were not necessarily lesser storms! Another common practice at the cooperative observing stations prior to 1950 did not involve measuring snow at all, but instead took the liquid derived from the snow and applied a 10:1 ratio (every inch of liquid equals ten inches of snow). This is no longer the official practice and has become increasingly less common since 1950. But it too introduces a potential low bias in historic snowfalls because in most parts of the country (and in the recent blizzard in the Northeast) one inch of liquid produces more than 10 inches of snow. This means that many of the storms from the 1980s or earlier would probably appear in the record as bigger storms if the observers had used the currently accepted methodology. Now, for those of you northeasterners with aching backs from shoveling, I am not saying that your recent storm wasn’t big in places like Boston, Portland, or Long Island. But I am saying that some of the past greats—the February Blizzard of 1978, the Knickerbocker storm of January 1922, and the great Blizzard of March 1888—are probably underestimated. So keep in mind when viewing those lists of snowy greats: the older ones are not directly comparable with those in recent decades. It’s not as bad as comparing apples to oranges, but it may be like comparing apples to crabapples.

We have about .50" here in northern Lehigh Valley with temp sitting at 32.3°

And that’s my point…what a nasty guy he is. Someone posts a gorgeous picture of skiing, and he puts a shit emoji. Dweeb in the purest sense.

Man, does that bomb out after it departs...Epic storm for Newfoundland.

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we saw this exact scenario with the event last weekend.

The cold stayed wedged in here today. Forecast high was 46. Currently raining and 37.

Officially, the National Weather Service defines a blizzard as a storm which contains large amounts of snow OR blowing snow, with winds in excess of 35 mph and visibilities of less than 1/4 mile for an extended period of time (at least 3 hours). https://www.weather.gov/fgz/WinterStorms Sent from my Pixel 10 Pro using Tapatalk

Hrrr probably smokin crack but has nice little event.

Wantage 0.3" at 240P since SB around 150PM. 32.4aF down from a high of 35.2. We had sprinkles at 1025 AM. Driveway snow covered but treated roads just wet.

https://phys.org/news/2025-12-hypertropical-climate-emerging-amazon-exposing.html

Sorry. No intelligence here. @Hitman ok, warm south of 84. Good?

If hrrr is right N IL scores again and I will be on southern edge. Cams definitely more north and globals more south. Crazy how much variability there still is the day before.

60 at Christmas is now closer to 35.................. What a thrill!!!!

I could Google it, but what's the criteria for actual blizzard conditions. I'm up in Avery. Don't know if I've ever been in an actual blizzard lol

Ripping snow out here (I'm outside Newton at work). Ground is recovered and the roads and sidewalks look to be accumulating some slush.

It's coming down good here in Egypt. Steady rates and sitting at 32.4° Hoping to get an inch...

Temps are 48, but the wind chill is 34 in this howler. Absolutely freezing my tail off.

The temp crash during the day Sunday on the euro is pretty impressive. FDK is 32 at 4am and 18 at 1pm with a gusty NW wind.

He’s been trolling AmericanWx for years. You may not be familiar with his posts.

Adding a few tenths on the latest train car of the endless clipper train this afternoon.

according to radar it's been snowing here for like 3 hours. in reality, we haven't had a drop of anything. Way to go, virga!

Surprisingly, it has stayed all snow here in Lebanon and continues to lightly fall. Temp was 35 and now down to 33 .