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Mesoscale Discussion 547 |
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Mesoscale Discussion 0547
NWS Storm Prediction Center Norman OK
0639 PM CDT Wed May 05 2021
Areas affected...Southwest kansas northwest Oklahoma
Concerning...Severe potential...Watch unlikely
Valid 052339Z - 060115Z
Probability of Watch Issuance...20 percent
SUMMARY...High-based thunderstorms may pose a risk for isolated
damaging wind gusts early this evening. Limited confidence exists on
how storms will evolve over the next couple of hours.
DISCUSSION...As of 2320 UTC, RADAR observations showed a loosely
organized line of high-based thunderstorms near the KS/OK Border.
These storms have recently produced severe hail and wind gusts in
the vicinity of DDC. Downstream of the ongoing storms, SPC
mesoanalysis and surface observations show a relatively warm airmass
with temperatures in the upper 70s to low 80s F. Moisture remains
limited with surface dewpoints in the 40s supporting only modest
destabilization. However, vicinity soundings show deep inverted V
profiles with around 500 J/kg of MUCAPE above the steep surface
lapse rates. Given the parameter space, it appears likely these
storms will continue to pose a risk of isolated damaging wind gusts
over the next couple of hours as storm outflow mergers support
greater cold pool development downstream into portions of Northwest
Oklahoma. Hi-res guidance suggests that storms will gradually begin
to weaken near sunset with the loss of diurnal heating. The limited
spatial and temporal threat suggests that a watch may not be needed,
but severe trends will be monitored.
..Lyons/Hart.. 05/05/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...ICT...OUN...DDC...AMA...
LAT...LON 35689893 36109974 36489995 37020032 37429985 37639933
37639896 37429821 37249781 36969750 36569738 36339753
36109763 35849788 35729826 35689893
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