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ACUS11 KWNS 281809
SWOMCD
SPC MCD 281808=20
FLZ000-281945-

Mesoscale Discussion 1923
NWS Storm Prediction Center Norman OK
0108 PM CDT Thu Oct 28 2021

Areas affected...central through south central Florida

Concerning...Tornado Watch 545...

Valid 281808Z - 281945Z

The severe weather threat for Tornado Watch 545 continues.

SUMMARY...Threat for isolated damaging wind and a couple of
tornadoes will persist through 21Z across central Florida.

DISCUSSION...A broken line of storms extends from south of
Jacksonville to just south of the Tampa area. Some supercell
structures are evident embedded within and just east of the line.
VWP data from Tampa prior to the arrival of the line show vertical
shear has increased during the past hour with 200-250 m2/s2 storm
relative helicity along with 40-45 kt effective bulk shear. The most
favorable environment for damaging wind and tornadoes will exist
during the next few hours, followed by a decreasing severe threat
after 21Z as low-level winds begin to undergo more substantial
veering.

..Dial.. 10/28/2021

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!u9KSZKKEMM2WnETNbuTaXAqy-G03K8Z4d4MKFmoD22XBVR5PW9wZKfH_0vNMpzw5aLHDEH_L$=
for graphic product...

ATTN...WFO...MFL...MLB...TBW...JAX...

LAT...LON 27398248 28098216 29248164 29698120 28718113 27188141
26608154 26708216 27398248=20



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