Thursday, September 6, 2012

September 7th Severe Weather Outlook

We have not done a severe weather outlook for some time because the Tropical Storms take predominance over the severe weather. However..I know many people on this page (storm support ) have fears of storms so even if i do not do an outlook you are still able to message me and I will answer any concerns you may have.. I also have made my phone # available to those on this page..Some have taken advantage of having the number and using it while others still have not.. 
For those that are reading this on the Real Wx Services page the above was addressed to those on my other page that I admin called Storm Support & Severe Weather Education.
Now back to the severe weather outlook .
Temperatures today across the area where there is the potential of severe are goin

g to be in the 80s to the 90s.
http://www.twisterdata.com/data/models/nam/221/maps/2012/09/06/18/NAM_221_2012090618_F30_TMPF_2_M_ABOVE_GROUND.png
Dew points will be in the upper 50s to upper 60s depending on where you are located..
http://www.twisterdata.com/data/models/nam/221/maps/2012/09/06/18/NAM_221_2012090618_F30_DPTF_2_M_ABOVE_GROUND.png
CAPE or Convective Available potential energy will be anywhere from 500- to as much as 4000 depending on where you are located..
http://www.twisterdata.com/data/models/nam/221/maps/2012/09/06/18/NAM_221_2012090618_F24_CAPE_SURFACE.png
Lift Index
Lift in the atmosphere will generally be from 0 to negative 10 however there is isolated locales that are around -11 to -12
http://www.twisterdata.com/data/models/nam/221/maps/2012/09/06/18/NAM_221_2012090618_F24_PLI_30_0_MB_ABOVE_GROUND.png

Now when it comes to tornados we like to look at things like the Energy Helicity Index and the Helicity and the Shear...
When we see the EHI like it is across Indiana /Illinois this tells us that tornado potential is possible especially in that part of the area.
http://www.twisterdata.com/data/models/nam/221/maps/2012/09/06/18/NAM_221_2012090618_F24_EHI_3000_M.png

And you will see that it is in these general areas that the Helicity is also on the high side...
http://www.twisterdata.com/data/models/nam/221/maps/2012/09/06/18/NAM_221_2012090618_F30_HLCY_3000_M_ABOVE_GROUND_0_M_ABOVE_GROUND.png

Shear also is pretty substantial incoming with this cold front..
http://www.twisterdata.com/data/models/nam/221/maps/2012/09/06/18/NAM_221_2012090618_F30_SHRM_500_MB.png

Shear shows to be 30 to as much as 60 knots...

At the surface we have a cold front that will be dropping east and south east across the region and this will serve as the trigger for the the severe weather potential.
http://www.hpc.ncep.noaa.gov/basicwx/95fwbgus.gif
Outside of the regions mentioned above for the tornado potential the main threats will be winds and hail...

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