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Mesoscale Discussion 2020 |
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Mesoscale Discussion 2020
NWS Storm Prediction Center Norman OK
0734 AM CST Sat Dec 11 2021
Areas affected...portions of north-central AL into northwest GA
Concerning...Severe potential...Watch unlikely
Valid 111334Z - 111500Z
Probability of Watch Issuance...5 percent
SUMMARY...Locally gusty winds may accompany thunderstorms across
parts of central AL into northwest GA this morning. However, severe
thunderstorm potential is expected to remain limited.
DISCUSSION...A line of strong storms extends from north-central AL
into east-central MS this morning ahead of an eastward-advancing
cold front. WW 562 is in effect for portions of northern AL,
however, severe potential appears low to the south and east of the
watch across parts of central AL and northwest GA. Strong deep-layer
southwesterly flow will continue to support fast moving cells within
the line of convection amid weak instability. This could allow for
locally gusty winds to move across the MCD area over the next few
hours. However, the 12z BMX RAOB and experimental RAOBs from the
University of Alabama - Huntsville indicate a somewhat hostile
midlevel thermodynamic environment with weak capping between 850-700
mb. Additionally, midlevel lapse rates remain poor across the
region. This will largely limit more intense convection and a new
watch is not expected at this time.
..Leitman.. 12/11/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...FFC...BMX...HUN...
LAT...LON 33268830 33568752 34238607 34618566 34928538 34968516
34918493 34748472 34558473 34158487 33858507 33278568
33078607 32968664 32898728 32868776 32898812 32988825
33268830
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