SPC MD 1646


MD 1646 Image

Mesoscale Discussion 1646
NWS Storm Prediction Center Norman OK
1211 AM CST Thu Nov 15 2018

Areas affected...Far east Illinois...central
Indiana...western/central Ohio

Concerning...Freezing rain 

Valid 150611Z - 151215Z

SUMMARY...Freezing rain accumulations are expected to continue, with
up to 0.04 inch/hour rates possible.

DISCUSSION...Up to 0.25 inches of accumulated ice have been observed
in some locales over the past several hours, with accumulations
noted on roadways and elevated surfaces alike. Surface temperatures
are currently below freezing across much of Indiana into Ohio, with
widespread 925-850 mb WAA noted within a conveyor belt of
precipitation. RAP point forecast soundings indicate 925-700 mb
warming rates of up to 8 C/hr associated with the WAA within the
aforementioned conveyor belt, with temperatures reaching over the
freezing mark within the 925-850 mb layer. As such, freezing rain is
expected to continue across the area, with accumulating rates of
0.02-0.04 inches/hr possible. A 100+ knot 500 mb jet streak and
associated dry slot are slowly impinging on the Ohio Valley. Given
the slow northeastward progression of this dry slot, freezing rain
is expected to continue for several more hours, perhaps as late as

..Squitieri.. 11/15/2018

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


LAT...LON   39128265 38968431 38918558 38738646 38728748 39758776
            41028772 41108751 41138557 40958425 40768315 40538252
            40308248 39688247 39208257 39128265 

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