Wednesday, January 18, 2012
Light Snow Tomorrow
Tomorrow, snow will start right before rush hour, and snow will strengthen throughout rush hour traffic and the rest of the morning. Generally looking at less than an inch before 11AM, with another .5-1.5" of snow possible in the afternoon as the snow slowly winds down. Again, this isn't a huge snow producer, but just a run of the mill clipper system. Be careful as this will be quick hitting and could cause travel issues, especially given the timing.
Monday, December 5, 2011
Snow Potential Tonight
Copious amounts of moisture are streaming in from the southern Ohio Valley, and precipitation is expected to stay in the area through the overnight hours. This rain will potentially turn to snow in Northwest Ohio this afternoon, even as early as 4:30-5:30 PM. This leaves heavy precipitation, likely some of it snow- in the area for several hours, leading to potential accumulations.
Again, this is another tough situation to forecast, as even during the storm, models have no handle on what's really going on. Due to the HRRR's continued consistency for this event, I will side for this for now. I currently expect a general 2-4" for most of NWOH and SEMI, although I could see those amounts completely busting. However, I think it is possible that someone receives over 5" in a localized area, but I don't expect that to be common.
Whatever happens, stay cautious on roadways this evening and be prepared for sudden changes in the weather. This is a very weird storm that could go either way. If we get snow, enjoy it. If not, don't be upset that we didn't. Until early this afternoon, nothing suggested a potential for any snow around here, and to see such a dramatic change is extremlely cool to see. Anyways, as Joe Bastardi says, "Enjoy the weather, because it's the only weather you got"
Monday, November 28, 2011
Potential Snowstorm- Tuesday-Wednesday
What has happened is a very strong upper level low (seen below) cut off from the main trough. This has stayed fairly stationary today, but is expected to move generally northeast throughout tomorrow and overnight.
Now, lets look at a few certainties for tomorrow:
1.) Precipitation will be almost all rain tomorrow morning/early afternoon
2.) A surface low will track east of the area, right around Erie PA
3.) The models have trended east in the past couple days.
Now, here's a few uncertainties:
1.) Will snow changeover to rain? If so, when?
2.) Where will the snow first begin to fly?
3.) Will ground temperatures limit accumulations?
4.) Is the cold/warm air still not forecasted correctly?
5.) How much snow will areas receive?
Unfortunately, many of these questions will not be answered until the event itself starts. There is still a decently large model spread between NCEP models and Global Models. The NAM has continued to rapidly shift to the east, giving Toledo 5" of snow based on raw BUFKIT numbers. The GFS, while also continuing to go to the east, still has north-central IN to Flint, MI as the heaviest snow swath.
What really throws a wrench into things is the ECMWF and UKMET. By far the most consistent models for this storm, the ECMWF has also slowly trended east, but much further east than any NCEP model. Shown here, and on AccuweatherPro ECM maps, the ECMWF has over 1" (liquid equivalent) of frozen precipitation for Fort Wayne/Extreme NWOH into SEMI. Based on accupro maps, the ECMWF shows a widespread 4-8" and even up to 10" plus in some areas. Below is an image from the link shown earlier this paragraph:
Another thing to note is the GGEM/RGEM from Environmental Canada (Their version of the NWS) show an earlier changeover to snow than the GFS/NAM, suggesting a bigger snow potential as well. The UKMET also appears to show something similar, while the GFS Ensembles also look to produce more snow than the operational.
For those looking for an easy forecast, shield your eyes from this storm. This is an extremely complex weather system, that likely will throw surprises at us even as we come ever closer to this possible snowstorm. Local meteorologists, NWS offices, and the HPC all seem to have different opinions, just as the models do. There are a few wildcards to watch, such as the amount of dynamic cooling that occurs in heavier precip, as that could cause an earlier switch to snow. Also, ground temperatures are going to be interesting, considering the amount of moisture in the soil right now. Sometimes heavy snow can accumulate quickly on a once warm and wet surface, and other times it does not matter.
I wish I could have a definitive answer for those reading this, but I honestly don't. My gut says that Fort Wayne to Flint gets the heaviest snow, likely over 4", while those east and west of there get slightly less. My preliminary forecast (take with a grain of salt) is 3-7" for NWIN/Southern MI, while NWOH gets 1-3". This could change a lot over the next 12-18 hours, so don't expect this to be a perfect forecast. I will likely be on and off the live chat for much of the night, so if you have any questions, don't hesitate to ask.
Anyways, this looks to be an exciting 36 hours!
Tuesday, November 22, 2011
Thanksgiving Week Forecast
Today into early Wednesday will have some light to moderate rainfall.
Saturday, October 1, 2011
Winter 2011-2012 Outlook
December: I’m a bit skeptical about this month in general. I do think early December will be cool, but I think a brief warm up towards the middle of December is possible. Although temperatures end up near average, along with above average precipitation, I don’t think anybody east of Grand Rapids gets anything higher than slightly above average snowfall. However, one big storm could ruin that forecast, and if we do get a big storm during one of the active periods of the month, above average snow is likely across the Great Lakes. I do believe that after Christmas, most of the Great Lakes and Plains are back to below average temperatures, while the south and parts of the I-95 corridor stay a bit above normal. Temperatures:
Tuesday, March 22, 2011
Spring Storm to Bring Snow, Severe Weather
As you can see, the current threat appears to be from a Cincinnati to Marietta line, along with areas in Kentucky, Tennessee, and West Virginia. People in Dayton, Columbus, and Newark should also pay attention to the weather tomorrow, and listen for watches and warnings to be issued. Wednesday, October 20, 2010
My Winter 2010-2011 Outlook
Winter 2010-2011 Forecast
As fall starts to peak and winter starts to approach, it’s time for many forecasters to issue a final winter outlook. At this time we are currently already in a moderate to borderline strong La Nina. This La Nina should peak by November and slowly weaken by the heart of winter. This current Nina coupled with a very +SOI, -GLAAM, and –PDO should create very interesting weather conditions across the U.S. and Canada. Before I get into the forecast, let’s see what is going on with the current La Nina.


With MEI bimonthly values of -1.9, the La Nina is currently the lowest on record at this point in time. This makes we want to believe that it will run out of steam by winter, with a weakening La Nina as winter starts. Currently our La Nina is Basin-Wide, but it appears it is trying to transition more to an east based La Nina. Current SST anomalies across the Equatorial Pacific reach -2.0 in the easternmost regions (Region 1.2 and 3), with higher anomalies in the more western regions. Although this may be temporary, many of the Long Range forecast models keep the La Nina central to east based, which may save the winter for parts of the Northeast and Ohio Valley regions.



The QBO also has taken a switch positive since the spring… coming off a long –QBO regime. A +QBO features positive Zonal Wind anomalies from 30mb-50mb (Although some places use up to 70mb, etc.) along the equator. As you can see in the image below, positive anomalies are starting to develop in the QBO regions, although it isn’t greatly positive yet. A +QBO in the winter tends to give a stronger Polar Vortex, which is harder to displace and cause those record breaking –AO values like last year. However, I still expect the northern 1/3 of the CONUS and Canada to be slightly cooler than average to very cold in the Northern Plains and PNW. +QBO’s aren’t typically associated with La Ninas, but the winters of ’71-72, ’73-74, ’75-76, did.


Above is the image of my top 3 analogues (I also threw in 1964-1965 although it’s not my favorite analogue). I was also tempted to add 1903-1904 as an analogue but I can’t get accurate data as far as QBO/PDO/AMO go… but adding that does give a somewhat cooler average look, which I will mention later on. As you can see it will pretty much go along with my thoughts: Cold north, warm south and east. The Great Lakes is right on the edge of where the cold and warm collide-leading to several events that could create a tight rain/snow line, also giving the area many ice storms (although each storm should have a different area affected). This winter will have very steep total snow gradients highly affected by each storm. I also think that this winter will be slightly cooler than the analogues above, although it’s more of a hunch than anything else. Some strong blocking periods with a –NAO/-AO will be possible this winter, leading to some brutal cold snaps, as I mentioned previously.
Precipitation Anomalies should be fairly positive as indicated by my top 3 analogues above. Both rainfall and snowfall should be above normal, so long-lived snowpacks could be less frequent due to some warm-ups (Especially in January, where the Southeast Ridge strengthens), but snowfall should still end up above average. This does not mean a record breaking season like last year was for the Mid-Atlantic states, but respectable totals should be seen across the Great Lakes, Midwest, Northeast, Pacific Northwest, and Northern Plains regions. Elsewhere across the south precipitation and snowfall should be below average, with some droughts possible in the deep South.
With Nino Regions 1.2 and 3 continuing to strengthen despite this, I’m favoring an East Based La Nina, with its’ peak coming relatively soon, at least a few weeks before the start of the Winter Season. However, we will still feel the affects of the Southeast Ridge, and the worst of this should happen in January, with February and March to a lesser extent. I feel like The last few weeks of February into early March could really add on to snow totals, especially in the Great Lakes and Interior Northeast regions. Take a look at this image below:
Look at how cold it is for much of the Northern U.S. in these 4 years (All Moderate-Strong La Ninas) in February and March. With Precip. Anomalies looking like this:


It’s hard to not have above average snow in the Great Lakes and Midwest. I’m leaning towards one of the snowier 4 week periods recorded for the last half of February into the first half of March. Even if you take out 1903-1904 the results are very similar… so it supports my thinking of a Cold/Snowy end to winter.
The Forecast:
I’ve explained my reasoning very thoroughly above, and it’s time to get into the actually forecast.
The Winter should really get kicking by the second half of November… with cooler than average temperatures extending into the Northern US for much of November into Mid December. A big storm or two for the Midwest is possible during this timeframe, and it could be quite snowy for the Northern Plains and Great Lakes. Somewhere after the Christmas timeframe I think the SE Ridge starts to develop and hold strong across the southeast, making a real struggle against cold and warm air in the Ohio Valley and Great Lakes regions. Panhandle Hooks and “Bowling Ball” systems that track through the Eastern US should be the predominant storm track along with Alberta Clippers—which can produce several small accumulations that add up quickly. Most of the Southeast and Eastern Coast should end up 1-3 degrees above average while the Interior Northeast, Great Lakes, and Midwest end up at average or slightly below average. Precipitation should be above normal in the Great Lakes, Midwest, and PNW with average to below average precip. in the southern half of the country, along with the East Coast.
February should have the Ridge Collapsing in the east, leading to colder than average temperatures to take a hold of the Midwest and Great Lakes, along with the Ohio Valley and Northeast. This month should be one of the colder months along with March, and above average precipitation and snowfall is likely for much of the Midwest, Great Lakes, and Ohio Valley regions. March should also be fairly similar to February, but after the first 15 days or so the pattern should slowly start to break down.

Winter Snowfall Outlook:
Winter Snowfall Outlook:
This should be an entertaining winter for many of the folks that were disappointed by last year’s winter.



















