Area Forecast Discussion
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FXUS64 KLUB 222132
AFDLUB

Area Forecast Discussion
National Weather Service Lubbock TX
332 PM CST Thu Feb 22 2018

.DISCUSSION...

Not a lot of changes for this forecast package. Clouds have been
slowly clearing from west to east today, though we`ll see somewhat
of a resurgence of some high clouds from the southeast overnight
predominately across the eastern 2/3 of the forecast area. This
moisture could produce some very light drizzle across the far
southeast, but more importantly, it will keep us from drying out too
much tomorrow.

Our main feature of interest for this forecast period is an upper
trough passing to our north on Saturday. Early Saturday morning, the
dryline will race eastward from the TX/NM line to OK, causing
dewpoints to crater behind it. As the H5 feature passes across SRN
CO/KS Saturday afternoon, the brunt of the winds will be dragged
across the South Plains. Bolstering these winds will be a max of 700
mb winds of 50-65 mph passing right over our forecast area, and
plenty of mixing is expected. At the surface, westerly winds of 25-
35 mph with gusts to 50 can be expected, and RH values will fall
well into the teens, even some single digits. Even with a Pacific
front pushing through to keep temperatures slightly lower, all other
factors point towards a critical fire danger day, and therefore, a
Fire Weather Watch has been hoisted for Saturday. With great mixing,
blowing dust will also be an issue for most of the forecast area,
more so on the Caprock.

Sunday may prove to be slightly breezy with the passage of another
upper level trough, though this one looks much more tame. We look to
settle down and warm up for a few days after that, as we find
ourselves in between systems. Models show a new deep trough gearing
up across the deep southwest by next Wednesday, but there is too
much uncertainty with the strength and track of this system attm.
Therefore, kept most mentions of PoPs out of this package.

FIRE WEATHER DISCUSSION...

As mentioned above, winds on Saturday are expected to kick up out
of the west at 25 to 35 mph with gusts to 50. The dryline will be
well east of the region, meaning RH values will plummet into the
teens and even single digits for all Lubbock forecast counties.
All told, RFTI numbers on the Caprock are looking to high 5-6, and
for the rest of the area, we are looking at a solid 4. Even with
the moisture we just saw, persistent drought conditions will
likely favor the more critical fire weather danger for Saturday.
Therefore, a Fire Weather Watch is in effect on Saturday from 16Z
to 0Z for the entire Lubbock forecast area.


&&

.LUB WATCHES/WARNINGS/ADVISORIES...
Fire Weather Watch from Saturday morning through Saturday
afternoon for TXZ021>044.

&&

$$

74/99


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