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| Mesoscale Discussion 1961 | |
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Mesoscale Discussion 1961
NWS Storm Prediction Center Norman OK
0806 PM CST Sun Dec 05 2021
Areas affected...Eastern Oklahoma...Northern Arkansas...Southern
Missouri
Concerning...Severe potential...Watch likely
Valid 060206Z - 060400Z
Probability of Watch Issuance...95 percent
SUMMARY...A severe threat is likely to develop from eastern Oklahoma
east-northeastward across southern Missouri and northern Arkansas
over the next hour. Weather watch will be needed across the region.
DISCUSSION...Latest surface analysis shows a cold front across
northern Oklahoma, far southeast Kansas and western Missouri. The
front is moving southeastward and low-level convergence has
increased over the last according to objective analysis. In
response, convective towers have developed along the front and cells
are beginning to initiate. The airmass ahead of the front is moist
with surface dewpoints near 60 F and MLCAPE is estimated to be in
the 1000 to 1500 J/kg range. In addition, the latest WSR-88D VWPs at
Tulsa and Fort Smith have 0-6 km shear in the 40 to 50 kt range with
speed shear in the boundary layer and curved hodographs. This should
be favorable for supercells with storms that can remain discrete
amid a rapid expansion in convective coverage. The low-level shear
may also support a tornado threat. Eventually, a nearly continuous
line of storms is expected to organize along the front. Wind damage,
hail and an isolated tornado threat should accompany the more
intense parts of the line. The threat should develop eastward and
southeastward with time as the cold front advances.
..Broyles/Guyer.. 12/06/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...OHX...PAH...MEG...LSX...LZK...SGF...TSA...ICT...
OUN...
LAT...LON 35179397 34899491 34919563 35019597 35299635 35699641
36139620 36599567 37039503 37529349 37809168 37968915
37908847 37568800 36968792 36598804 36168870 36048967
35549278 35179397
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