MD 1368 CONCERNING SEVERE THUNDERSTORM WATCH 352… FOR NORTHERN MN
Mesoscale Discussion 1368
NWS Storm Prediction Center Norman OK
0204 AM CDT Mon Aug 27 2018
Areas affected...Northern MN
Concerning...Severe Thunderstorm Watch 352...
Valid 270704Z - 270930Z
The severe weather threat for Severe Thunderstorm Watch 352
continues.
SUMMARY...Damaging wind threat spreading across northern Minnesota
with potential for WW 352 to be expanded east into part of the
Minnesota Arrowhead region.
DISCUSSION...At 0650Z, mosaic radar imagery showed a line of fast
moving (45-50 kt) storms extending from Ontario and across the
international border into northern MN (near KINL) and then southwest
to southern Beltrami and Hubbard Counties. Although objective
analyses had indicated an increase in inhibition during Sunday
evening across northern MN, rising surface temperatures and dew
points per observations across northeast MN ahead of the line are
aiding in late night destabilization, and some steepening of
low-level lapse rates. This is being aided further by steep
midlevel lapse rates spreading east across this region ahead of a
progressive shortwave trough. IR satellite imagery indicated cooling
cloud tops with the southern extent of the line, suggesting
intensifying storms. Given these factors combined with strong
effective bulk shear, the threat for damaging winds persists
eastward overnight.
..Peters.. 08/27/2018
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...DLH...FGF...
LAT...LON 46999468 47239526 47779483 48149375 48309356 48589345
48639315 48439248 48219177 48169102 47789101 47309177
47069310 46979385 46999468
from SPC Mesoscale Discussions http://bit.ly/2Nmb1t3
Be First to Comment