|Mesoscale Discussion 987|
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Mesoscale Discussion 0987
NWS Storm Prediction Center Norman OK
1200 PM CDT Sun Jun 11 2017
Areas affected...Northern and central Wisconsin into Upper Michigan
Concerning...Severe Thunderstorm Watch 313...
Valid 111700Z - 111900Z
The severe weather threat for Severe Thunderstorm Watch 313
SUMMARY...The damaging wind threat should persist across the watch
area through the afternoon.
DISCUSSION...A long-lived bow echo continues to move rapidly
eastward across north central WI, with slower trailing line segment
extending into southwest WI. Surface observations indicate gradual
heating via advection ahead of the line, with dewpoints rising as
well. The greatest threat area should continue to be with the bow
apex, which will track eastward along the lifting warm front.
Transient areas of embedded rotation including a risk for a weak
tornado may exist. Southern parts of the line currently contain more
marginal wind, but the storms remain substantial, and conditions
ahead of the line remain diurnally favorable for some further
strengthening. Marginally severe hail is also possible with the
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 46099020 46068820 46058734 45898702 45578693 45258692
44318736 43958762 43548772 43528830 43678919 43939039
44149125 44419129 44819071 45049030 45269006 45559005
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