SPC MD 262

By Newsroom America Feeds at 15 Apr 00:15

MD 0262 CONCERNING WINTER MIXED PRECIPITATION FOR LOWER MI
Mesoscale Discussion 0262 NWS Storm Prediction Center Norman OK 1114 PM CDT Sat Apr 14 2018 Areas affected...Lower MI Concerning...Winter mixed precipitation Valid 150414Z - 151015Z SUMMARY...Long-duration mixed precipitation event expected to begin across Lower MI within the next hour or so. Expectation is for this event to last throughout the night. DISCUSSION...Well-developed warm conveyor attendant to a deepening mid-latitude cyclone will continue to contribute to warm air advection through a sharp frontal zone. At the surface, low associated with the cyclone is centered over east-central IL with a warm front extending east-southeastward across IN and into south-central OH before turning back northeastward into west-central PA. Expansive precipitation shield continues to expand northward toward the sub-freezing temperatures across western portions of Lower MI. Forecast soundings show a substantial warm nose around 850 mb with sub-freezing temperatures persisting at the surface. As a result, the continued northeastward progression the precipitation will likely bring the onset of freezing rain across portions western Lower MI within the next hour or so. Slow progress of the parent cyclone will likely keep this area under light to occasionally moderate precipitation throughout the night. Predominant precipitation type is expected to be freezing rain across central and southern portions of Lower MI while colder surface temperatures will promote more sleet farther north. ..Mosier.. 04/15/2018 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DTX...APX...GRR... LAT...LON 42338488 42578623 43248657 44888599 45248379 43688330 42398358 42338488 Read more

http://www.spc.noaa.gov/products/md/md0262.html

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