Area Forecast Discussion
Issued by NWS Midland/Odessa, TX

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FXUS64 KMAF 200927

427 AM CDT Fri Mar 20 2015


...Confidence in widespread heavy rain and flooding has increased as
we head into tonight and Saturday...

A strong cold front currently along the I-10 corridor continues to
plow south across the region. Temperatures were in the 60`s ahead of
the front cooling to the 40`s behind it. Showers and thunderstorms
continue to develop across the area in response to a shortwave seen
well in WV imagery. Most of this activity will begin to weaken later
this morning as the wave exits the region.

The well advertised upper through to our west has begun to move east
with a large plume of Pacific moisture streaming north well ahead
of it. Disturbances in this flow will likely lead to several
rounds of showers and thunderstorms before the trough passes by
Saturday night. The focus for precipitation today will be mainly
along and south of I-20 closer to where the cold front and best
moisture is. Some heavy rain and localized flooding is possible
within stronger storms mainly in the Lower Trans Pecos.

The upper trough will finally begin to lift across the region
tonight and Saturday. Precipitation chances increase significantly
as stronger lift arrives and PWAT values near record highs for this
time of year (1.25 inches). To add to this, the area will also be in
the left exit region of a 100 kt upper level jet streak most of the
day Saturday. Given all the above, heavy rainfall and flooding is a
good bet for at least the southern half of the area. Given an
already saturated ground with recent rains and rain likely falling
most of the day today, will issue a Flash Flood Watch to include the
Presidio Valley, Big Bend, and Lower Trans Pecos. The watch will
focus on tonight and Saturday when the heaviest rainfall is
expected. It is possible that later shifts will need to expand the
watch north.

Have gone with coolest guidance today and Saturday given thick
clouds and precipitation. A drying and warming trend is expected
Sunday with the passage of the upper trough. Temperatures peak in
the 80s by the middle of next week before another strong cold
front arrives late in the week.


ANDREWS TX                 58  44  60  44  /  30  20  60  40
BIG SPRING TX              61  47  60  48  /  40  30  60  60
CARLSBAD NM                59  48  61  44  /  20  30  70  30
DRYDEN TX                  65  55  62  52  /  80  60  80  40
FORT STOCKTON TX           53  45  57  47  /  60  60  90  40
GUADALUPE PASS TX          54  42  57  44  /  30  40  70  30
HOBBS NM                   60  43  61  43  /  20  20  60  30
MARFA TX                   56  45  55  38  /  60  70  80  30
MIDLAND INTL AIRPORT TX    58  46  59  46  /  40  30  80  50
ODESSA TX                  57  45  59  45  /  40  30  80  50
WINK TX                    58  48  58  45  /  40  40  80  30


TX...FLASH FLOOD WATCH from late tonight through Saturday evening FOR
     THE FOLLOWING ZONES... Big Bend Area...Davis/Apache
     Mountains Area...Marfa Plateau...Pecos...Presidio Valley...




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