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November 2025

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Going to drive up to Bald Knob (4400 feet) tomorrow afternoon and get some snow squalls...

Most models have 2-4 inches for them and its short drive from Blacksburg so why not!

Last few core runs of HRRR have showed this moderate band of snow making it into Blacksburg between 8-10 pm. Would not be surprised to see some light accmulations T to 1 inch possible. NAM 3 km and RAP both saying the same thing. I think this could be much more juicy than modeled especially with the strength of this vortmax being the main reason for the band.
 
Fascinating very detailed update from Chi NWSO 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
 
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