SPC MD 91



MD 0091 CONCERNING FREEZING RAIN FOR EASTERN WISCONSIN THROUGH NORTHERN LOWER MICHIGAN AND EASTERN UPPER MICHIGAN

MD 0091 Image

Mesoscale Discussion 0091
NWS Storm Prediction Center Norman OK
1135 AM CST Thu Feb 07 2019

Areas affected...eastern Wisconsin through northern Lower Michigan
and eastern Upper Michigan

Concerning...Freezing rain 

Valid 071735Z - 072030Z

SUMMARY...Areas of freezing rain will persist this afternoon from
eastern WI into northern Lower MI and eastern Upper MI, with the
greatest coverage expected through mid afternoon. Rates will range
generally from .03 inch per hour up to .10 inch per in the heavier
showers.

DISCUSSION...As of late morning areas of freezing rain are in
progress from eastern WI through northern Lower MI. Most of this
activity is occurring in association with a broad area of isentropic
ascent north of a warm front situated over the OH Valley. The
southerly low-level jet will increase across the great lakes today,
east of a surface low that is deepening in response to an
approaching shortwave trough. The low will track from northern IL
through lower MI, and as the low-level jet strengthens, the
temperature within the melting layers aloft will increase, resulting
in freezing rain as the dominant precipitation type. Precipitation
over much of this area might become more widely scattered with time
due to an approaching dry slot. However, steepening mid-level lapse
rates resulting from 850 mb warming beneath slight mid-level cooling
will maintain the potential for local/widely scattered convectively
enhanced showers.

..Dial/Hart.. 02/07/2019

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

ATTN...WFO...DTX...APX...GRR...MQT...GRB...MKX...

LAT...LON   46618509 45808391 44868338 43698417 43898674 43128899
            43788916 46328629 46618509 

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