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Area forecast discussion 
National Weather Service Midland/Odessa Texas
930 PM CST Mon Dec 22 2014


Update to issue a Winter Weather Advisory for northern and central
Lea County, and Gaines and Dawson counties tonight/Tuesday morning.



Winds have yet to pick up in the Guadalupe or Davis Mountains this
evening, but think they still will later tonight as h7 winds of 40
to 50kt traverse the region at the base of a shortwave trough poised
to move overhead. Of a little more concern is the potential for
snow moving southeastward across the area later tonight/Tuesday
morning. The ground is pretty warm from recent above normal
temperatures, but cold air is spilling south through eastern New
Mexico and the Texas Panhandle behind a strong cold front.
A few thunderstorms have developed over southeast New Mexico and the
Permian Basin as lift increases ahead of a shortwave trough
translating southeastward over New Mexico, and in the upper levels
in the lfq of a 140+kt h25 jet.

Expect precipitation to continue through the night, but as the front
pushes south, and the column cools aloft, precipitation will change
to snow north of Interstate 20. The phase change will take place
over the northern half of Lea County, then into the northern Permian
Basin from 23/06z to 23/09z. Since surface temperatures behind the
cold front are running a couple of degrees cooler than the latest
models, and the column will cool as precipitation changes to snow,
think we will see 1 to 3 inches of snow accumulate over northern and
central Lea County, and Gaines and Dawson counties late tonight/
Tuesday morning. The warm ground may limit accumulation on roads,
but grassy and raised surfaces will likely have most of the
accumulation. Some roads could become slick in the advisory area
since temperatures may cool to freezing or below.

Expect adjacent counties to the advisory area to see a rain/snow mix
through late tonight, or maybe just all snow by Tuesday morning.
Think precipitation will begin to decrease in intensity and areal
coverage though, and surface temperatures above freezing/warm ground
will prevent much accumulation. Any adverse driving conditions in
the advisory area should improve after 23/15z as temperatures begin
to warm a little.


Preliminary point temps/pops...
Andrews Texas 33 43 28 50 / 80 40 0 0
Big Spring Texas 35 45 30 52 / 80 40 0 0
Carlsbad nm 37 47 25 52 / 50 20 0 0
Dryden Texas 46 52 32 55 / 10 20 0 0
Fort Stockton Texas 37 44 28 53 / 30 40 0 0
Guadalupe Pass Texas 31 42 24 45 / 20 20 0 0
Hobbs nm 32 45 25 49 / 100 30 0 0
Marfa Texas 34 41 15 48 / 10 20 0 0
Midland International Airport Texas 35 46 26 50 / 60 40 0 0
Odessa Texas 35 48 28 51 / 60 40 0 0
Wink Texas 38 48 27 55 / 50 40 0 0


Maf watches/warnings/advisories...
nm...High Wind Warning until 3 am MST Tuesday for the following
zones... Guadalupe Mountains of Eddy County.

Winter Weather Advisory until 7 am MST Tuesday for the following
zones... central Lea County...northern Lea County.

Texas...High Wind Warning until 4 am CST /3 am MST/ Tuesday for the
following zones... Davis/Apache Mountains area...Guadalupe

Winter Weather Advisory until 8 am CST Tuesday for the following
zones... Dawson...Gaines.




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