on cue:
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE, IL
541 AM CST THU FEB 18 2021
UPDATE
541 AM CST
MADE A QUICK UPDATE TO THE GRIDS TO UP THE CHANGES OF SNOW OVER
THE CHICAGO METRO THROUGH 15Z THIS MORNING. RADAR IMAGERY
INDICATES THAT LAKE ENHANCEMENT IS UNDERWAY OVER MUCH OF THE
CHICAGO AREA. THIS IS LIKELY TO RESULT IN SOME LIGHT TO MODERATE
SNOW RATES OVER THE NEXT COUPLE HOURS. THEREAFTER, WE SHOULD BEGIN
TO LOSE THE BETTER SYNOPTIC SCALE SUPPORT LATER THIS MORNING, SO
RATES SHOULD GRADUALLY EASE. FORECAST GUIDANCE HAS NOT BEEN
HANDLING THIS LAKE ENHANCEMENT WELL, BUT CURRENT TRENDS SUGGEST
THAT SOME ISOLATED ACCUMULATIONS OVER THE NEXT COUPLE HOURS COULD
APPROACH 2 INCHES IN SOME AREAS NEAR THE LAKE.
SINCE THIS WILL HAVE AN IMPACT ON THE MORNING COMMUTE, WE HAVE
ISSUED AN SPS AND A GRAPHIC CAST TO MESSAGE THIS CONCERN.