SPC MD 69



MD 0069 CONCERNING FREEZING RAIN FOR PORTIONS OF EASTERN IA…SOUTHWEST WI…NORTHWEST IL AND FAR NORTHEAST MO

MD 0069 Image


Mesoscale Discussion 0069
NWS Storm Prediction Center Norman OK
0137 PM CST Tue Feb 05 2019

Areas affected...portions of eastern IA...southwest WI...northwest
IL and far northeast MO

Concerning...Freezing rain 

Valid 051937Z - 060030Z

SUMMARY...Light freezing rain, perhaps mixed with sleet, will
increase in coverage through the afternoon. Freezing rain rates
around 0.05 inches per 3 hours or greater are possible into late
afternoon/early evening.

DISCUSSION...Light freezing rain and sleet has been reported at
several sites across central into eastern IA this afternoon. Latest
radar trends indicate increasing precipitation coverage across
eastern IA. Surface temperatures range from the upper teens to upper
20s across the MCD area and the depth of the near-surface freezing
layer extends to about 2-3 kft. Atop this cold layer, a strong warm
nose was evident in morning regional RAOBs as well as latest RAP
forecast soundings and mesoanalysis around 850mb. As a result,
freezing rain and sleet should be the predominant precipitation type
into this evening. Precipitation intensity will be light, however,
the ingredients are in place for potentially optimal ice
accumulation given freezing temperatures and light winds. Ice
accumulation/freezing rain rates may increase some toward 00z as
forcing increases as a shortwave impulse currently in NE ejects
east/northeast through the evening.

..Leitman.. 02/05/2019

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

ATTN...WFO...LOT...ILX...MKX...DVN...ARX...DMX...EAX...

LAT...LON   41568910 40869051 40489137 40409190 40529222 40689249
            41349282 42009255 42419196 42749122 42949036 42918964
            42698924 42358904 41988898 41568910 

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