All Activity

Some pretty impressive ascent from the vort max and meso low!

This looks fairly legit and I’m fairly jealous

Maybe some flurries this week ?

You're about to see a Buffalo band, hope you're still awake for this.

Top 3 thunderstorm for the year here, and perhaps in quite a while. 5 minute pea sized hailstorm, which is rather rare in my local neighborhood. Absolutely torrential rain to boot. And now your never even know it rained. Sent from my Pixel 9 Pro XL using Tapatalk

Yeah it seems like they're alluding to it in their AFD as well. It may be hard to know exactly which way it'll go until the mesolow pushes farther inland/weakens a bit over the next few hours, as that's when the band will be more free to whip west, which it will still want to do based on radar trends farther up the lake. However, the shorter the window for that to happen the better for getting the band to stay more coherent.

Some light accums have taken place in northern Summit over the last couple hours. On the board!

Mesoscale Discussion 2202 NWS Storm Prediction Center Norman OK 0955 PM CST Sun Nov 09 2025 Areas affected...Northwestern Indiana and northeastern Illinois Concerning...Heavy snow Valid 100355Z - 100900Z SUMMARY...An intense lake effect snow band will drift slowly south-southwestward across northwestern Indiana and northeastern Illinois through the early morning hours. Heavy snowfall rates of 2+ inches/hour are expected under the core of the band. DISCUSSION...Regional radar data shows a well-defined snowband favorably oriented along the long axis of Lake MI. This snowband is on the backside of a mesoscale low that evolved off of Lake MI and is moving slowly southward across far northern IN. As this feature continues southward, and low-level flow continues veering to a north-northeast direction over Lake MI, the band will have a tendency to drift gradually south-southwestward across far northwestern IN and northeastern IL through the early morning hours. The 00Z GRB sounding sampled very cold temperatures aloft (-40C at 500 mb), which is yielding steep low/midlevel lapse rates and a deep convective boundary layer (aided by relatively warm lake waters). Given the favorable/persistent orientation of low-level flow down Lake MI and significant convective enhancement, heavy snowfall rates of 2-3 inches per hour are expected under the core of the band as it continues south-southwestward. Isolated lightning flashes will also be possible. There will likely be a sharp drop-off in the heaviest snowfall rates as the band tracks southwestward across northeastern IL (owing to less favorable thermodynamic conditions), though exactly where this will occur is uncertain. Additionally, gusty winds within the band will yield significant visibility reductions where snowfall rates are maximized. ..Weinman.. 11/10/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...IWX...LOT... LAT...LON 42278765 41998745 41768708 41818669 41608645 41248667 41228727 41438787 42008820 42268810 42358788 42278765

That more or less seems like what LOT just hinted at on Twitter too. Less likely there will be "slight break before a 2nd band". Seems to imply this will be the sole band now. Definitely would boost odds of some higher totals.

Laporte getting wrecked thanks to the stalled mesolow. Current conditions at La Porte Municipal Airport (KPPO) Lat: 41.57°NLon: 86.73°WElev: 812ft. Heavy Snow Freezing Fog 30°F -1°C Humidity 100% Wind Speed W 16 G 35 mph Barometer 30.05 in Dewpoint 30°F (-1°C) Visibility 0.15 mi Wind Chill 19°F (-7°C) Last update 9 Nov 9:55 pm CST

Looking like an overperformer here, up to 0.75" of rain!

I don't think the band taking slightly longer to swing west is a bad thing for the immediate lakeshore/Chicago area (and probably ups the odds at someone getting a higher-end total)...some earlier model depictions had it swinging west and breaking into weaker multi-bands pretty quickly (before congealing as it swings back east on Monday). This slower west push right now may allow for a more focused band that lasts longer close to the lake later tonight.

Was just about to comment on that. Nothing from NWS?

Fascinating very detailed update just a few minutes ago from Chi NWSFO explaining how difficult this forecast is:UPDATE ISSUED AT 944 PM CST SUN NOV 9 2025 HAVE EXPANDED THE WINTER WEATHER ADVISORY TO INCLUDE FORD AND BENTON COUNTIES, OTHERWISE NO CHANGES TO THE MANY, MANY HEADLINES IN EFFECT. ALSO, NO BIG CHANGES TO THE FORECAST GRIDS THIS EVENING. CONVECTIVE ALLOWING MODELS (CAMS) OFTEN STRUGGLE WITH THE EXACT DETAILS OF LAKE EFFECT SNOW, MUCH LIKE THEY DO WITH SPECIFICS OF SUMMERTIME CONVECTION. THIS WAS THE CASE THIS EVENING WITH THE MOVEMENT AND TIMING OF THE LAKE INDUCED/ENHANCED MESO-LOW, WHICH MOVED INLAND INTO NORTHERN IN HOURS EARLIER THAN MOST CAM GUIDANCE HAD BEEN INDICATING. THE FASTER AND FARTHER EAST TRACK OF THIS MESOLOW HAS RESULTED IN CAMS BEING WRONG IN THEIR DEPICTION OF A LARGE INITIAL WESTWARD SURGING LAKE EFFECT SNOW PLUME WELL INLAND INTO NORTHEASTERN IL LATE THIS EVENING. RATHER, THIS MESOLOW HAS BECOME NEARLY STATIONARY OVER NORTH CENTRAL INDIANA WITH A COHERENT, INTENSE SINGLE BAND OF LAKE EFFECT SNOW EXTENDING NORTHWEST THEN NORTH UP THE SPINE OF THE LAKE FROM THIS MESOLOW. SURFACE OBSERVATIONS DEPICT A SHARP SURFACE TROUGH EXTENDING NORTHWEST FROM THE MESOLOW ACROSS SOUTHERN LAKE MICHIGAN. THIS TROUGH AXIS HAS BEEN STEADILY MOVING SOUTHWARD DOWN THE LAKE, WITH THE STRONG LOW LEVEL NORTHEASTERLY FLOW IN THE WAKE OF THIS TROUGH HELPING PUSH THE LAKE EFFECT PLUME STEADILY WESTWARD. AS THIS TROUGH CONTINUES TO PUSH SOUTH OF THE LAKE, ANTICIPATE THAT WESTWARD PROGRESSION OF THE LAKE PLUME SHOULD PUSH IT INTO NORTHEAST IL BETWEEN 11 PM AND MIDNIGHT. CONFIDENCE IS LOW IN HOW FAR WEST THIS PLUME WILL GET INTO NE IL BEFORE BECOMING QUASI-STATIONARY FOR A TIME, THEN LIKELY SHIFTING BACK EASTWARD TOWARD AND ACROSS NORTHWEST IN MONDAY. REALLY NOT PUTTING A TON OF STOCK IN CAM GUIDANCE AT THIS POINT, SO ONCOMING MIDNIGHT SHIFT WILL BE NOWCASTING THIS BAND THROUGH THE NIGHT BASED ON OBSERVATIONAL TRENDS. NO CHANGE TO THE MAGNITUDE OF INSTABILITY, WHICH IS CONFIRMED BY A SPECIAL 0030Z VALPARAISO UNIVERSITY SOUNDING FROM THIS EVENING. STILL ANTICIPATE SNOWFALL RATES OF AT LEAST 2-3 INCHES PER HOUR WITHIN THE HEAVIEST ELEMENTS OF THIS BAND. DEPENDING ON HOW LONG THE BAND BECOMES QUASI-STATIONARY, IT IS CERTAINLY POSSIBLE THAT WE COULD SEE ISOLATED TOTALS PUSHING OR EVEN EXCEEDING A FOOT BEFORE THE BAND BEGINS SHIFTING EASTWARD. CURRENT TRENDS WOULD SEEM TO SUGGEST THAT LAKE OR COOK COUNTY IL COULD BE THAT WESTWARD TERMINUS THAT SEES SOME OF THE HEAVIER TOTALS. WHERE EVER THE BAND IS DURING RUSH HOUR TOMORROW MORNING, TRAVEL CONDITIONS WILL BE VERY DIFFICULT TO NEARLY IMPOSSIBLE. - IZZI

The massive meso-low currently at the southern tip of the lake is just cranking. Can't recall seeing something to that magnitude before around here.

Looks pretty good out there over the layke atm

@Torch Tiger all set check your personal messages.

finally,some rain to keep the leaf piles from blowing away tomorrow.

Down to 33. The roads are very wet, liable to be some icy travel if we get down to 24 as predicted.

Looks like it will be a relatively short punch here downwind in Jasper County. Not bought into the deterministic output for snow accumulation. But that’s just experience talking vs any science applied. Still think there’s a shot of an inch or so. Looking forward to seeing what comes of this further north and west into the city.

@mreaves all set - check your personal messages.

Giving us that Xtra westerly push?

Any good webcams out of Chicago ?

Gnarly storms for this time of year. Jumped at a couple of these sudden bolts.

One of many… But this particular meso-low earlier this afternoon was quite significant.