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Mesoscale Discussion 1174 |
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Mesoscale Discussion 1174
NWS Storm Prediction Center Norman OK
0726 AM CDT Fri Jun 21 2019
Areas affected...Southeast NE...Southwest
IA...Northwest/North-Central MO...Northeast KS
Concerning...Severe Thunderstorm Watch 414...
Valid 211226Z - 211400Z
The severe weather threat for Severe Thunderstorm Watch 414
continues.
SUMMARY...Threat for strong wind gusts continues across the region
as two mesoscale convective systems track quickly southeastward.
DISCUSSION...Southern end of the leading MCS currently extending
from central IA into northern KS/MO border vicinity has maintained
its strength over the past hour or so, with some strengthening
recently noted. Portion of the line in MO is moving orthogonal to
the instability gradient, with mesoanalysis estimating 3000-3500
J/kg of MLCAPE near Kansas City decreasing to less than 1000 J/kg
near CDJ (in north-central MO). Consequently, storms near Kansas
City are the most intense and gust of 51 kt was reported at LWC as
the line went through around 1115Z. Well-organized character of this
MCS coupled with ample instability and moderate vertical shear
suggest MCS persistence over the next few hours across
northern/central MO. Current storm motion of this MCS is
southeastward at 30 kt, placing it at the edge of Severe
Thunderstorm Watch 414 around 1430Z. A downstream watch will likely
be needed.
Second MCS currently extends from just east of BIE (in southeast NE)
to south of CNK (in northeast KS). This line had shown signs of
weakening but recently reinvigorated as it moved into the more
buoyant air across southeast NE/northeast KS. BIE recently reported
a 55 kt gust as the line moved through. As with the line ahead of
it, this MCS is currently expected persistence for at least the next
few hours. Given storm intensity, some areal expansion along the
southern edge of Severe Thunderstorm Watch 414 may be needed across
northeast KS. Current storm motion is southeastward at 40-45 kt,
which is faster than the leading MCS. As result, these two systems
may eventually interact, although when this occurs and the resulting
effects are uncertain.
..Mosier.. 06/21/2019
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LSX...DVN...SGF...DMX...EAX...OAX...TOP...GID...
LAT...LON 40299733 41389619 41389455 40549229 39049233 38419357
38779616 39359788 40299733
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