SPC MD 62

SPC MD 62

MD 0062 CONCERNING FREEZING RAIN FOR NORTHEASTERN IL...CENTRAL/NORTHERN IN...WESTERN OH
MD 0062 Image

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

Concerning...Freezing rain 

Valid 180601Z - 181000Z

SUMMARY...Greatest freezing rain potential will extend from
northeastern Illinois into western Ohio. Freezing rain rates could
exceed 0.05"/hr.

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.

..Darrow.. 01/18/2020

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...ILN...IWX...IND...LOT...ILX...

LAT...LON   41878783 41718654 41428588 40648359 39718382 39708629
            40408767 41878783 

Read more