SPC MD 1718



MD 1718 CONCERNING TORNADO WATCH 439… FOR MUCH OF CENTRAL FLORIDA

MD 1718 Image


Mesoscale Discussion 1718
NWS Storm Prediction Center Norman OK
1241 PM CST Thu Dec 20 2018

Areas affected...much of central Florida

Concerning...Tornado Watch 439...

Valid 201841Z - 202045Z

The severe weather threat for Tornado Watch 439 continues.

SUMMARY...The severe threat persists for the watch area, with
primarily a damaging wind threat. An isolated tornado remains
possible.

DISCUSSION...Storms have become linear as the front and outflows
have merged, and movement of the line currently has a substantial
eastward component. Winds aloft are mainly parallel to the line, and
objective analysis shows a general decrease in low-level helicity,
in part due to substantial boundary layer mixing. As such, bowing
segments will be capable of damaging winds, and brief areas of
rotation may occur as well. A greater tornado threat would occur if
the line could slow.

Ahead of the line, scattered convective showers were deepening with
heating, but these will have a lesser threat of severe weather
compared to the main line as most of them remain decoupled from the
surface layer. A supercell cannot be ruled out with this activity
should a cell turn right of the mean motion.

..Jewell.. 12/20/2018

...Please see www.spc.noaa.gov for graphic product...

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

LAT...LON   25788214 27098159 28258129 29118122 29238088 28838053
            27558025 26868033 26308058 25818106 25738160 25738197
            25788214 

Read more



Source link

Editor
  • Editor
  • Website is owned by STL.News, LLC, but hosted, designed and maintained by WebTech Group (WTG). WTG is a St. Louis based web designed firm offering digital marketing services and news sites. We created RSSWX.News to help the major search engines easily find news direct from the source, which is the National Weather Service.