SPC MD 1757



MD 1757 CONCERNING FREEZING RAIN FOR PORTIONS OF NORTH TEXAS INTO WEST-CENTRAL OKLAHOMA AND FAR SOUTHEAST KANSAS.

MD 1757 Image


Mesoscale Discussion 1757
NWS Storm Prediction Center Norman OK
1128 AM CDT Mon Oct 26 2020

Areas affected...portions of north Texas into west-central Oklahoma
and far southeast Kansas.

Concerning...Freezing rain 

Valid 261628Z - 262030Z

SUMMARY...Ongoing freezing rain and mixed precipitation is forecast
to continue for at least the next several hours. Ice and sleet
accumulation is likely.

DISCUSSION...1530z observations showed widespread freezing rain and
mixed precipitation ongoing across portions of north Texas and
west-central Oklahoma. To the southwest of the ongoing precipitation
shield, a new zone of elevated thunderstorms has developed in
response to continued mid-level warm air advection and isentropic
ascent ahead of a diffuse shortwave trough. The shallow arctic
airmass across much of Oklahoma is forecast to continue to gradually
creep southward through this afternoon. Model soundings show much of
the ongoing and developing precipitation will remain in an airmass
favorable for periods of freezing rain and mixed precipitation
types. While much of the heavier precipitation from the initial
shortwave trough earlier this morning will remain on the warmer side
of the boundary, the threat of icing and perhaps accumulating sleet
will likely continue for at least the next several hours.
Precipitation intensity is forecast to gradually decrease through
this afternoon as upper-level support wains behind the passage of
the initial shortwave trough. However, the saturated shallow arctic
airmass and weak mid-level warm advection will likely support light
precipitation in the form of freezing mist or sleet through the
evening.

..Lyons/Thompson.. 10/26/2020

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

ATTN...WFO...SGF...TSA...ICT...OUN...SJT...LUB...AMA...

LAT...LON   34699757 33969850 33859859 33489935 33129994 33050056
            33330067 34490022 35099969 36009872 37059715 37599616
            37619584 37569539 37359502 37129498 36709536 36339584
            35739648 35499668 35119704 34699757 

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