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ACUS11 KWNS 120733
SWOMCD
SPC MCD 120733=20 PAZ000-MDZ000-WVZ000-VAZ000-OHZ000-NCZ000-TNZ000-KYZ000-121330-

Mesoscale Discussion 0244
NWS Storm Prediction Center Norman OK
0133 AM CST Sat Mar 12 2022

Areas affected...Portions of southern and central Appalachians and
vicinity

Concerning...Heavy snow=20

Valid 120733Z - 121330Z

SUMMARY...Heavy snow is possible within the southern and central
Appalachians and vicinity. 1-2 inches per hour snowfall is possible
in eastern Tennessee and Kentucky. Rates of 1-1.5 inches per hour
will continue to move northeastward into West Virginia and
western/central Pennsylvania towards early morning.

DISCUSSION...Temperatures have been dropping quickly across eastern
Tennessee and Kentucky over the past 1-2 hours as cold air advection
and diabatic cooling have increased. Correlation coefficient data
from KJKL and KMRX show a transition zone from rain to snow roughly
located in the Cumberland Plateau vicinity. This transition zone has
quickly shifted east over the last hour. The combination of
mid-level ascent and upslope flow will support 1-2 inch snowfall
rates along the western slopes into the Appalachians. The greatest
snowfall rates will begin to taper off by 4-6 AM EST.

Farther north, snowfall is increasing across West Virginia into
western Pennsylvania. Several observations sites are reporting
moderate to heavy snow that is has been primarily driven by 850-700
mb frontogentic lift. As the trough moves east and intensifies,
deep-layer ascent will increase in these areas into early Saturday
morning. The potential for 1-1.5 inch snowfall rates will increase
accordingly during the next several hours.

..Wendt.. 03/12/2022

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!uXDPYKRmq3PAggLalj8dZHGwoL29W0mQleh-6BzVtpUL848lLJgTnMATrH75ZS65JVIKy67v$=
for graphic product...

ATTN...WFO...CTP...LWX...RNK...PBZ...RLX...GSP...MRX...JKL...
ILN...OHX...

LAT...LON 35138465 35358528 36178495 38028348 38998223 39758112
40188064 40987979 41587849 41567797 41367742 39687823
38537909 37677988 37048067 35948210 35138341 35138465=20



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ACUS11 KWNS 031616
SWOMCD
SPC MCD 031615=20
KYZ000-TNZ000-GAZ000-INZ000-ALZ000-ILZ000-031915-

Mesoscale Discussion 0244
NWS Storm Prediction Center Norman OK
1015 AM CST Fri Mar 03 2023

Areas affected...much of Kentucky...far southern Indiana...Middle Tennessee...northern Alabama

Concerning...Tornado Watch 60...

Valid 031615Z - 031915Z

The severe weather threat for Tornado Watch 60 continues.

SUMMARY...The threat for tornadoes will increase through the
afternoon, from near the Ohio River southward into northern Alabama
and eventually Georgia. Additional watches are likely later today
east of ongoing tornado watch #60.

DISCUSSION...A surface low near the IL/KY border will continue to
deepen today as it travels up the OH River Valley and near a warm
front. Areas of thunderstorms are ongoing near the low, with an
arcing line of cells extending south into northern AL. Breaks in the
clouds as well as strong southerly advection will continue to
destabilize the warm sector, with sufficient instability forecast to
support supercells with tornadoes by afternoon.=20

Limited instability near the warm front will be mitigated by very
strong lift combined with cooling aloft, and these height falls will
extend southward into Middle TN. Midlevel lapse rates will be
steeper beneath the midlevel wave, with the surface low track and
warm front zone being a favored area for tornadoes, some strong.
Initial convection near the low has periodically shown signs of
rotation.

Ongoing storms from middle TN into northwest AL will continue to
strengthen as well, aided by higher boundary-layer theta-e despite
being south of the midlevel jet core. Very strong shear is in place
across the entire region, favoring fast-moving supercells and
tornado threat.

..Jewell/Grams.. 03/03/2023

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8A7Qx9FYF5MExCLhvdK0jMlFTKNtz4-g4qHnwzIgFN0Ly17jS_SEcD1GxIrowEx_bs2iGC4vm= PqA-Qs_rL6iJc3av0A$ for graphic product...

ATTN...WFO...MRX...JKL...FFC...LMK...OHX...BMX...HUN...PAH...
MEG...

LAT...LON 36428468 35868491 34948539 34468576 34208624 34088668
33908755 33938806 34368795 35048787 35698784 36338797
36708834 37168888 37648799 38208682 38438583 38408503
38208447 37808423 37508425 37098435 36428468=20


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ACUS11 KWNS 142356
SWOMCD
SPC MCD 142356=20
OHZ000-INZ000-150100-

Mesoscale Discussion 0244
NWS Storm Prediction Center Norman OK
0656 PM CDT Thu Mar 14 2024

Areas affected...Southeastern Indiana into portions of
southwest/south-central Ohio

Concerning...Tornado Watch 44...

Valid 142356Z - 150100Z

The severe weather threat for Tornado Watch 44 continues.

SUMMARY...An area of greater tornado potential is evident from
southeast Indiana into southwestern Ohio over the next 1-3 hours.

DISCUSSION...Three supercells from just east of Indianapolis to
northwest of Columbus, OH have shown a rightward turn to the
southeast. Surface flow remains backed in southwestern portions of
Ohio. Considering the observed storm motion and regional VAD
profiles, an area of greater tornado threat is evident from
southeastern Indiana into southwestern Ohio. 850 mb winds are
expected to increase this evening as well. Should storms remain
discrete and surface wind backed, the environment would become more
favorable in the next 1-3 hours.

..Wendt.. 03/14/2024

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6_TJ3sAmbNqickdvLKT09tykJ2Z5DMWMBe4I53_2EMbskUkYg30-JLBofelbgTPJwo7XxKy53= X5dMariYnCdjVLoKoM$ for graphic product...

ATTN...WFO...CLE...ILN...IWX...IND...

LAT...LON 40018607 40428488 40648376 40398273 39908261 39438294
39198359 39288471 39418551 39698595 40018607=20


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