Area Forecast Discussion
Issued by NWS Midland/Odessa, TX

Skip options and go directly to product.
Home | Oldest Version | Previous Version | Current Version | All | Text Only | Save Text | Print | Product List | Glossary On

Skip product version selection by date and time.   
520
FXUS64 KMAF 272323
AFDMAF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
618 PM CDT Fri Mar 27 2015

.DISCUSSION...

See 00z aviation discussion below.

&&

.AVIATION...

VFR conditions are expected for the next 24 hours.  Winds will
mostly be light out of the south to southwest before becoming
westerly to northwesterly Saturday afternoon.

&&

.PREV DISCUSSION... /ISSUED 255 PM CDT Fri Mar 27 2015/

DISCUSSION...

WV imagery shows a broad ridge over the western CONUS, leaving West
Texas and Southeast New Mexico under NW flow aloft.  SW sfc flow has
allowed afternoon temps to rebound to near-normal, w/a couple of
degrees left to go.

Upper ridge will begin breaking down and nudging east over the next
24 hours in response to a trough making landfall in the PacNW.
However, heights/thicknesses will continue increasing thru Sunday as
the ridge moves overhead, resulting in well-abv normal temps
Sat/Sun, w/Sun especially feeling like late May.  However, despite
this, guidance seems a bit warm, w/diurnal spreads to big, perhaps
because both the NAM and GFS initialized too dry on sfc Td.
Forecast soundings and H85 temps suggest staying on the lower end.
Even so, temps should be the warmest yet this spring, w/an elevated
fire danger Saturday from the Guadalupes to the Davis/Apache Mtns.

Unfortunately, this comes to an end Sunday night as a cold front
from the aforementioned PacNW trough moves thru the area, w/fropa at
KMAF at around 23Z Sun.  Latest ECMWF is faster, but w/fronts
weakening as Spring progresses, and diurnal heating Sunday
afternoon, the front will probably stall for a few hrs Sunday
afternoon to the north.  This should take temps back down to around
normal Monday afternoon.

Meanwhile, a secondary trough will make landfall in SoCal/Nrn Baja
and approach the region, transitioning flow aloft to SW Monday.
Monday night and Tuesday, the trough will move thru the region,
w/the GFS slightly faster/shallower than the ECMWF/DGEX/CMC.  W/the
50 deg isodrosotherm forecast to be west of mid-CWA by 06Z Tuesday,
this will be our best shot at rain this forecast.  Forecast
soundings of the lwr Trans Pecos develop SBCapes in excess of 1000
J/kg, w/PWATs of around 1", or 3 std devs abv normal.  Attm, shear
looks lousy w/the arrival of the trough, but wet-bulb zero heights
will be favorable for a marginal hail threat.

Otherwise, a gradual warmup follows the trough under zonal flow
aloft, w/flat, dirty ridging in place, w/temps above-normal into the
extended.

&&

.MAF WATCHES/WARNINGS/ADVISORIES...
NM...NONE.
TX...NONE.

&&

$$

99

Follow us on Facebook and Twitter at:
http://facebook.com/NWSMidland
http://twitter.com/NWSMidland

Check us out on the internet at:
http://weather.gov/midland

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.