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Mesoscale Discussion 0224
NWS Storm Prediction Center Norman OK
0215 AM CDT Tue Mar 24 2020
Areas affected...portions of far northeast OK/southwest MO into
central AR
Concerning...Severe potential...Watch possible
Valid 240715Z - 240915Z
Probability of Watch Issuance...40 percent
SUMMARY...Elevated thunderstorms will pose mainly a marginally
severe hail threat through early morning. A watch is not expected at
this time, but convective trends will be monitored.
DISCUSSION...Isolated thunderstorms have developed over portions of
western AR over the last hour or so in a strong warm advection
regime on the nose of a 40+ kt 850 mb low level jet. Stronger
forcing, associated with a weak shortwave impulse ejecting eastward
from the central/southern Rockies, is spreading eastward across the
southern Plains. As a result, elevated thunderstorms are expected to
increase in coverage and intensity over the next couple of hours.
Weak elevated instability (max MUCAPE around 500 J/kg) will be
sufficient to support sustained convection in strong vertical shear
environment. Midlevel lapse rates around 7-7.5 C/km, with long,
straight forecast hodographs indicative of hail potential. Sporadic
hail is expected to be the main concern, with 0.5 inch to 1 inch
hail possible in strongest cells.
..Leitman/Guyer.. 03/24/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...MEG...LZK...SGF...TSA...
LAT...LON 34059195 34039260 34089329 34259373 34499403 35239463
35919516 36369529 36889506 36969476 36889397 36559262
36289212 35599131 35059109 34679104 34449113 34299128
34099180 34059195
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