MD 0062 CONCERNING FREEZING RAIN FOR NORTHEASTERN IL...CENTRAL/NORTHERN IN...WESTERN OH
Mesoscale Discussion 0062
NWS Storm Prediction Center Norman OK
1201 AM CST Sat Jan 18 2020
Areas affected...Northeastern IL...Central/Northern IN...Western OH
Valid 180601Z - 181000Z
SUMMARY...Greatest freezing rain potential will extend from
northeastern Illinois into western Ohio. Freezing rain rates could
DISCUSSION...Well-defined warm conveyor has evolved from
MO-IL/IN-Lower MI. Strong isentropic ascent ahead of a pronounced
short-wave trough will continue through the night and a broad
corridor of precipitation should gradually shift from west to east
across the Mid-MS/OH Valley region. Strong warm advection has
gradually raised surface temperatures above freezing across much of
MO into central IL and substantial boundary-layer warming is
expected to change freezing rain to rain by 12z across much of IN.
Forecast soundings support this with strong warming at 850mb as
50-60kt LLJ strengthens across the OH Valley. Freezing rain threat
should linger across northeast IN into western OH through 12z.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 41878783 41718654 41428588 40648359 39718382 39708629