sbnwx85

Congrats! And thank you for adding inches into your measurements. This lazy American appreciates it

Seeing some snow showers popping up on radar. I think the cell near South Bend has a hook

Tracking tomorrow's snow squall will kind of be like tracking a line of severe storms. The high temperature on Wednesday could actually end up occurring late morning immediately ahead of the much anticipated strong arctic cold front expected to reach northwest Illinois/Rockford area toward midday and quickly push across the rest of Chicagoland into northwest Indiana through the afternoon. This front will likely be accompanied by a period of gusty snow showers and potentially a dangerous snow squall. Hi- res guidance continues to suggest conditions will be conducive for snow squalls. The RAP highlights well the potential for a narrow axis of low-level frontogenesis to develop with the front coinciding with steep low-level lapse rates along with a modest 3-hr surface pressure rise/fall couplet on either side of the front. This could aid in enhancing wind gusts within this fgen band locally up to 40-45 mph. A lingering question remains when these "ingredients" all come together, with the snow squall parameter increasing as the front approaches the I-55/57 corridors into northwest Indiana. While the Rockford area is not fully out of the woods, it is possible coverage is lower west of the Chicago metro. If this scenario plays out, the snow showers/squall may be developing as the front moves into the Chicago metro. Regardless, all areas of northern Illinois and northwest Indiana will want to be prepared for a brief period of sharply reduced visibility in snow/blowing snow and a quick coating on roadways resulting in slick travel during the afternoon/evening commute. To put this round of possible snow showers/squalls into perspective compared to last week`s, surface temperatures will already be below freezing (which were too warm last week for a more robust initial snow squall with the front) and would support snow readily accumulating on roadways. However, the pressure gradient is not as strong, with peak wind gusts currently expected to remain in the 40- 45 mph range versus the 55-60mph wind gusts observed last week. Nevertheless, multiple hi-res models depict localized visibility reductions as low as 1/4 mile within these snow showers/squalls.

Having never been in a Snow Squall Warning I wondered if the emergency alert would be triggered on my phone if one is issued. Here’s what I found: “Only high-impact snow squall events that are tagged as “significant” will trigger a Wireless Emergency Alert in the warned area, which will reduce overalerting. The new “significant” tag will be implemented by various weather forecast offices on Nov. 7, 2022 with nationwide implementation completed by February 2023”.

Yea, all my snow melted this weekend. And the lake effect is staying north this week, so we need a refresher pack asap.

Models showing another good lake effect event mid-week. The winds might be too westerly for my personal liking.

As much as I love snow, one thing I miss about Central Illinois weather is the occasional 60+ degree day in the middle of winter.

Ended with 4.3” at home. Work had 6.5”. It was 11 degrees when I woke up this morning. Very wintry day.

Puking snow now

Wish I could send the snow to everyone!

Death band drifting south. It's about to be rocking.

Up to about 2.5” on the south side of South Bend. There’s an impressive lake effect band about 10 miles to my north… we’ll see if it makes it this far south.

It's snowin and blowin! snowvideo.mp4

SBN clocked in with a 58 mph wind gust as the front came through.

Sho enough

This is my moment.

I know how annoying it can be to read about lake-effect snow for those outside the belts, but it's all we have right now. Winter Storm Watches are up in Michigan a couple row of counties along the shoreline. This reminds me of the Christmas lake-effect blizzard from two years ago... although not quite as cold or as windy. It's still going to create a mess and at least blizzard-like conditions. Hopefully the messaging gets out there. I imagine there's already some "snow fatigue" for those buried over the weekend.

That clipper should reinvigorate the lake effect machine after it passes through. Winds will be higher than previous events this week so it’ll be even more impactful in areas that have snow on the ground. I think 3-5” is a good call here with a multi-band set up covering a wider area.

One of the bigger forecast busts we’ve had in a while. My 3”-6” call for South Bend was horrible but not as bad as NWS’ 8”. I think too much shear inland prevented the lake bands from getting into Indiana. Parts of SW Michigan did well with 10+”. On to the next one.

Looking like some big bust potential on the lake-effect locally. Bands seem to be setting up more to my east. HRRR catching onto it as well. I may get shutout at home but still end up with several inches at work.

Someone in SW Michigan could wake up to a foot and a half of snow by tomorrow morning. DISCUSSION... Issued at 120 PM EST Mon Dec 2 2024 Strong ern lake Michigan centered thermal troughing driving robust low level convergence zone and intense lake snow bands this aftn through sw MI. Background steering flow weak attm but will pickup a bit heading into tonight and expect this will spread further inland into the South Bend metro especially north of US20. Overlap of potential mesolow tracks puts ground zero for the heaviest storm total snowfall accumulations around 18" across nrn Berrien and perhaps into nwrn Cass with much less south and east given limited inland penetration before these bands breakup quickly Tue morning.

Very scientifically interesting AFD from IWX this morning on the lake effect potential. DISCUSSION... Issued at 440 AM EST Mon Dec 2 2024 Overall no major changes to the forecast thinking from yesterday. Highest confidence in 8+" remains over the eastern half of Berrien County into NW Cass. Lower confidence in warning-criteria totals for St. Joseph IN but latest hi-res suggests far northern portions of the county will get clipped with heavier rates later today. Did delay the start time for areas outside of Berrien/Cass though. Went with advisory for northern La Porte, Elkhart, and St. Joseph (MI) with the lowest confidence on the eastern side of St. Joseph (MI) and the western side of La Porte. No headlines to the south but may have to watch northern Marshall and northern Kosciusko. We will continue to fine-tune the location of the lake effect snow bands through today and some changes to headlines may still be possible. Details below... Morning water vapor shows robust shortwave currently diving into the Upper Midwest. Low level wind profiles will continue to slowly veer through tonight as this midlevel trough axis passes and low level lake aggregate troughing becomes better established. LES which is currently hampered by WNW fetch, dry air entrainment, low inversion heights, and overall meager instability will gradually intensify and organize through tonight. Equilibrium levels still expected to climb above 10 kft by this afternoon per latest hi-res forecast soundings. 0-2km delta theta-e values also drop below zero by this afternoon and strong ascent/supersaturation in the DGZ will promote large flakes and high (potentially over 20:1) SLR`s. Of greatest concern though is the increasing potential for meso-low formation over SE Lake MI and into Berrien County this afternoon as suggested by the latest runs of the HRRR and RAP. Already starting to see some hints of this in latest GRR radar imagery given overall weak synoptic flow becoming increasingly convergent over the eastern lake thanks to very warm lake waters/induced troughing. If this verifies...much higher snowfall totals are likely in the 18-00Z time window. Models have been mixed on whether this feature drifts far enough south to impact South Bend before dissipating but latest runs seem to be trending further south and this was the primary reason for going with a warning in St. Joseph (IN). There may be a brief lull in activity during the evening hours before the low level flow veers further and briefly connects with Lake Superior during the late overnight hours. Even here some models are hinting at a "type-VI" (dominant single band with a meso-low on the southern end) moving down the lake in the 06-12Z period. Instability parameters remain highly favorable but final lake effect band intensity and snowfall amounts will be heavily driven by the degree to which this band can become organized. The biggest negative factor for this event continues to be the highly variable low level wind directions. Stronger synoptic flow is anticipated tonight with only a brief window of favorable down-axis fetch/Superior connection before flow quickly backs once again Tue AM. Significant questions remain if this will be enough time to allow a single band to fully develop, or if (as hi-res models suggest) it is more of a broken/transient hybrid with pockets of heavier snow and possible small-scale circulations that never fully organize into a single continuous band. Either way the chances for heavy snowfall rates to remain stationary in one particular area for a long time remain low and warrant a cautious approach to overnight snowfall totals for now. Additional changes are quite possible as we progress into tonight though. Continued to make very few changes to the NBM-initialized long term grids. LES will end quickly late Tue AM as flow backs SW and dry conditions will persist trough most of Wed. Highs even climb above freezing on Wed with some brief but modest WAA. This will be short- lived though as another deep upper low dives into the Great Lakes Wed night and sends a strong cold front through the area. Moisture availability is not ideal but expect some SCT rain showers along the front followed but blossoming lake effect snow behind the front. Still plenty of time for adjustments but currently expect strong NW flow will bring a cold (but dry) airmass with limited fetch for significant snow accumulations. LES ends by Fri with a longer period of light WAA expected over the weekend into early next week that will return temps to seasonal norms.

Latest HRRR run makes me think I’m going to be under.

Cloudy and cold today. A couple flurries. It was nice to see the sun yesterday. Lake effect still looking good for tomorrow. I’m thinking 5-8”+ for the Michigan counties just north of South Bend. 3-6” throughout the city seems like a good bet.

60 cm is 23.622 inches if you’re wondering