Area Forecast Discussion
National Weather Service Memphis TN
1202 PM CST Wed Feb 6 2019
Interesting:
Past model runs have been too hasty on lifting the front
north out of our CWA...with the 00z runs holding off now until
this evening when the surface low begins it`s shift northeastward.
This delay may provide a better threat/focus for a few severe
storms across our area and heavier rainfall. CAMs suggest a pool
of 800-1200 j/kg of CAPE just south of the boundary this
afternoon with decent shear supporting a Fixed-layer STA of near
4. Interesting and worrisome...one of the CIPs analogs for 07/00z
is the February 5th 2008 outbreak. So what are the limiting
factors? A lack of height falls pushing in for one...perhaps morning
showers limiting the low-level instability keeping a CAP in place
and mediocre midlevel lapse rates. Feel that the upward bump to a
slight risk near the boundary by SPC was a wise decision...and it
may have to be expanded south to the MS state line if pockets of sun
are observed. The threat for severe weather will continue tonight as
the shear increases through midday tomorrow with the cold front
approaching. have added an isolated tornado threat in today`s HWO.
Total rainfall amounts of near 3 inches are still projected near
the KY and Mo borders...with 1-2 farther south. In addition have
issued a wind advisory beginning late tonight into tomorrow across
the western counties as 850mb winds increase to 55-65kts. Above
normal temperatures for the next 30-36 hours...will fall quickly
tomorrow afternoon and evening. Heat indices of 75-80F will
become windchill in the teens in approximately 12 hours.