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ACUS11 KWNS 191828
SWOMCD
SPC MCD 191827
IAZ000-MNZ000-191930-
Mesoscale Discussion 1084
NWS Storm Prediction Center Norman OK
0127 PM CDT Thu Jul 19 2018
Areas affected...South-central Minnesota...north-central Iowa
Concerning...Severe potential...Watch unlikely
Valid 191827Z - 191930Z
Probability of Watch Issuance...5 percent
SUMMARY...A few instances of brief funnel clouds are possible with
stronger updrafts near a surface warm front and upper-level low. Any
funnel that reaches the ground, though unlikely, would be brief and
weak. No WW is likely.
DISCUSSION...Ambient vorticity from a strong upper-level low as well
as a surface warm front has led to a few instances stronger updrafts
acquiring weak rotation and producing funnel clouds. These funnels
were reported with a line of generally weak storms from Brown
County, MN to near Palo Alto County, IA. Brief instances of funnels
may occur with some of the stronger updrafts. While these funnels
are not likely to reach the ground, should touchdown occur, it would
likely be brief and quite weak. No WW is likely.
..Wendt/Guyer.. 07/19/2018
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...MPX...DMX...
LAT...LON 44049480 44119481 44219497 44469515 44639504 44669441
44519404 44209366 43509330 43069349 42999393 43089431
43529463 44049480
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