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Mesoscale Discussion 1360 |
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Mesoscale Discussion 1360
NWS Storm Prediction Center Norman OK
1108 PM CDT Wed Jun 18 2025
Areas affected...portions of central Missouri
Concerning...Severe potential...Watch unlikely
Valid 190408Z - 190545Z
Probability of Watch Issuance...5 percent
SUMMARY...A couple instances of marginally severe hail may occur
over the next couple of hours. A WW issuance is not expected.
DISCUSSION...An embedded 500 mb impulse is overspreading MO,
contributing to locally higher deep-layer shear (e.g. 40+ kts of
effective bulk shear per 03Z mesoanalysis), as well as deep-layer
ascent. As such, a few transient supercells have developed, with
MRMS mosaic radar data suggesting that some of these storms are
producing hail that is approaching severe limits. Mid-level lapse
rates are not particularly steep, as shown by the 00Z SGF observed
soundings, which depicts near 7 C/km mid-level lapse rates atop a
stabilizing boundary layer. While an instance or two of 1+ inch
diameter hail may be observed, the aforementioned tall/thin CAPE
(with MLCAPE around 1000 J/kg) and modest deep-layer shear suggest
that severe hail should be overall isolated. As such, a WW issuance
is not expected.
..Squitieri/Smith.. 06/19/2025
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LSX...SGF...EAX...
LAT...LON 37959434 38589392 38979245 38769109 38219066 37589103
37339210 37379301 37569393 37959434
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN
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