Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 190533
AFDHGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1133 PM CST THU DEC 18 2014

.AVIATION...
CEILINGS HAVE CONTINUED TO LOWER TO IFR THIS EVENING...WITH A FEW
SITES REPORTING LIFR CONDITIONS. EXPECT THESE LOW CIGS TO PERSIST
DURING THE OVERNIGHT HOURS THROUGH FRIDAY MORNING. ONGOING
SHRA/TSRA ACTIVITY PREVIOUSLY RELEGATED TO THE STATIONARY FRONT
/ANALYZED ALONG THE TEXAS COASTAL BEND TOWARDS MATAGORDA BAY AND
STRETCHING EASTWARD INTO THE GULF AS OF 11 PM/ HAS NOW EXPANDED TO
INCLUDE ADDITIONAL DEVELOPMENT ACROSS THE TERMINALS. THIS
ACTIVITY WILL CONTINUE TO INCREASE IN COVERAGE OVERNIGHT AS LIFT
AHEAD OF A SHORTWAVE TROUGH PRESENTLY OVER THE BIG BEND REGION
OVERSPREADS THE AREA. PATCHY FOG WILL ALSO DEVELOP/PERSIST IN A
NEARLY SATURATED BOUNDARY LAYER... FURTHER COMPLICATING CONDITIONS
AT TERMINALS WITH VISIBILITY RESTRICTIONS.

BRIEF PERIODS OF HEAVY RAIN MAY ALSO IMPACT VISIBILITY AT THE
TERMINALS...WITH GPS MET ESTIMATED PWATS AROUND 1.2-1.4 INCHES
/ALMOST 175 PERCENT OF CLIMATOLOGICAL NORMALS/. THE AFOREMENTIONED
SHORTWAVE TROUGH WILL APPROACH THE REGION AROUND MIDDAY
FRIDAY...CLEARING THE AREA FRIDAY NIGHT. NORTHEASTERLY WINDS
AROUND 5 TO 10 KNOTS WILL BECOME MORE NORTHERLY AROUND 10 TO 15
KNOTS FRIDAY AFTERNOON AS THIS DISTURBANCE DEPARTS THE REGION.
CONDITIONS LOOK TO IMPROVE ONLY MODESTLY BY FRIDAY EVENING WITH
FORECAST SOUNDINGS KEEPING A LOW-LEVEL INVERSION IN PLACE AT THE
TERMINALS INTO FRIDAY NIGHT...WITH MOISTURE TRAPPED UNDER THIS
INVERSION PRODUCING MVFR CIGS AROUND 1500-2000 FT.

HUFFMAN

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      52  55  46  55  44 /  90  80  10   0   0
HOUSTON (IAH)              56  60  48  56  45 /  90  80  20  10   0
GALVESTON (GLS)            61  65  51  55  51 /  80  80  20  10  10

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.
&&

$$


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