Trying to hit a few key issues today. First, the potential for accumulating snow in the Mid-Atlantic over the weekend. It’s snowed, sleeted, thundered, etc. across much of the Mid-Atlantic and Northeast in the last 36 hours…why not add something else to the mix?
Map to the left is the NAM model depiction of snowfall for the next 72 hours. It shows you snow stretching from Omaha to Kansas City to St. Louis to Louisville to Cincinnati to just south of Washington, DC. This has been shown off and on throughout the week on all the models. It looks like we’re game on for a snow event. The problem is (of course) the exact storm track. The GFS forecast is *slightly* further north, which would bring more snow into DC and much less around Richmond. I would side in between the two right now…with light snows south of Baltimore to south of Richmond, with an axis of heavier snow, probably in the middle, through, say Fredricksburg, VA. Could be a decent event for the northern part of the Blue Ridge. This will not be a *major* event, but given that it’s almost April, every snow event is extra painful.
So if you have weekend plans, specifically Sunday, keep this in mind. It is the time of year where it’s tougher to get snow to stick on the roads, but given that we’re leading into this event with several cold days, we could see more sticking than we normally would in late March.
In other news, spring may be delayed somewhat in the East. Just got a look at the latest weekly forecast from the European model…and, yeah, it looks cold if you live anywhere north of about Florida. Not guaranteed to verify, but this is certainly not what you want to see if you live in the Northeast, Plains, Great Lakes, or Mid-Atlantic.
However, this may help slow snow melt some over the northern tier…which is good because the latest river forecasts show major flooding likely on the Mississippi near St. Paul. Could be another painful Upper Midwest flooding season.
Been out of town the last few days for a conference, so here’s a rundown of some things I’ve marked of interest. Plus we’ll talk about the weather for the weekend.
So the Upper Midwest got absolutely spanked over last weekend. Just a massive snowstorm, even for that part of the country. Here’s some information on that storm.
The image on the right is courtesy of the CIMSS Satellite Blog, showing the development and movement of the storm as it lifted through the Midwest, along with lightning strikes. Thundersnow isn’t too rare or uncommon, but it still seems to be surprising when it happens. That usually means though that you’re dealing with a bigtime storm or some very heavy snowfall. The storm set a few daily records at Minneapolis and Duluth. But the snow was quick to compress…it is still somewhat early in the snow season. Overall, the maximum totals looked to sit around 6-12″ in a band from Duluth back through MSP, Mankato, and down to the Iowa border.
Also a good write up from Minnesota Public Radio on some of the more unique aspects of this storm…particular the convective aspect, as well as the fact that temperatures were in a prime range for good accumulations.
Keeping on the topic of winter weather and convection: Big Sky Convection’s Dann Cianca has a good write up and very nice pictures from catching some convective snow in Denver on Tuesday.
Congrats to the Washington Post’s Capital Weather Gang for having the phrase “Snowmageddon” make the list of the top words of 2010. They were likely the original ones to coin this term. I’m not sure who coined “Snowpacalypse,” but while it was clever and useful for last winter, I hope this trend of coming up with clever catch phrases for every snowstorm stops. I’m still comfortable with “Super Bowl Snow” or “President’s Day Storm.” But in rare instances (and last winter was very rare), it’s manageable.
As hurricane season winds down, Greg Nordstrom has a look at how the Accumulated Cyclone Energy (ACE) stacks up compared to some other hyperactive years. This year isn’t in the top 5, despite I think being there for actual *number* of storms. There was some pretty pathetic named storms this year (Nicole and Bonnie come to mind). Now, ACE is a decent gauge of a season or storm’s intensity, but it only factors in wind velocity and duration. We’ve learned in recent years especially that there is a LOT more to a hurricane than wind speed, pressure, surge, etc. Not all 125 mph storms are alike. So while this season may go down with the perception of sort of a bust (since the US was spared) and even ACE to some extent, this season was definitely hyperactive and worth the insane forecasts put out prior to the start of the season. I think we just simply dodged a bullet this year. It doesn’t make anyone more overdue or less overdue or anything…it just is what it is.
Lastly, in what could be the coolest minor league sports move ever, the Omaha Royals have changed their name to the “Storm Chasers!” I don’t know if the Royals “brand” has been tarnished in recent years, which prompted the change, but it’s really cool regardless. The article does point out that things have changed in recent years (see: Lehigh Valley IronPigs, Richmond Flying Squirrels, etc.). I’m all for cool minor league team names.
Just a quick synopsis here on what’s coming. The image to the left shows the GFS model’s depiction of weather on the West Coast come Saturday evening. This is a MUCH different look than we’ve seen of late out here, with almost 60-70% of days I would suspect having offshore flow, dry weather, and oodles of sunshine…a nice respite after an awful summer. Well, the storm door has officially opened. And it starts this weekend. Strong low pressure off the British Columbia coast is driving a series of cold fronts, rain, and snow into the Northwest and eventually down the coast. By Saturday evening, that low pressure parks along the Oregon coast. As we go through the next few days, each one of the cold fronts swinging through is going to reinforce and strengthen cold air over the Northwest, driving down snow levels to around 2,000′ initially, then below 1,000′, and then perhaps down to “ground level” by the time we get to late in the weekend, so places like Seattle and Portland may not be exempt from snowfall. And this could set the stage for a White Thanksgiving for a lot of places in the Northwest.
Down here in California, it’s going to get colder as well, with Sierra snowfall likely, and even snow in the SoCal mountains. Just assuming from the maps, without specifically forecasting, that snow levels will approach or dip below 5,000′ in the San Gabriel and/or San Bernardino Mountains early next week. The question I guess becomes whether or not we see any precipitation at that time. This is a very interesting and cold pattern for the West Coast though, so the next few days definitely should be fun to watch.
This cold air should also work its way to the east during Thanksgiving week, bringing a pretty strong cold shot to the East cities just after Thanksgiving. Stay tuned!