AREA FORECAST DISCUSSION
NWS CHICAGO IL
AFDCHI 300 AM CST SAT FEB 24 2001
THE SURFACE WETBULB TEMPERATURES ARE STILL BELOW FREEZING ACROSS
MOST OF THE AREA THIS MORNING. ACARS SOUNDINGS SHOW THE ABOVE
FREEZING LAYER ABOVE 1800 FT. WILL KEEP A FREEZING RAIN ADVISORY FOR
THE ENTIRE NORTHEAST ILLINOIS AND NORTHWEST INDIANA THIS MORNING.
THE EXTRA HEAT IN CHICAGO MAY PREVENT A LOT OF ICE DOWNTOWN BUT
OUTLYING AREAS WILL GET ICE.
LOOKING AT THE PRECIPITABLE WATER AND ADVECTION OF MOISTURE WITH
THIS STORM. WE EXPECT SOME BRIEF PERIODS OF HEAVY RAINFALL THIS
AFTERNOON AND TONIGHT. WILL ISSUE A FLOOD WATCH FOR AREAS AROUND THE
KANKAKEE RIVER AND PARTS OF THE FOX AND ILLINOIS RIVER.
THERE WILL BE A CHANCE OF THUNDERSTORMS IN OUR SOUTHERN COUNTIES.
THERE IS STRONG WARM AIR ADVECTION AND A LOW LEVEL JET. WILL KEEP
FLURRIES SUNDAY BUT WILL NOT MENTION ACCUMULATIONS.
.CHI...FLOOD WATCH FOR NORTHWEST INDIANA. LASALLE...MCHENRY AND KANE
COUNTIES IN ILLINOIS THIS AFTERNOON AND TONIGHT.
FREEZING RAIN ADVISORY TILL 9 AM CST FOR NORTHWEST INDIANA AND
NORTHEAST ILLINOIS.
GALE WARNING FOR LAKE MICHIGAN TONIGHT AND SUNDAY.
$$
WHW