Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 290546
AFDHGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1146 PM CST WED JAN 28 2015

.AVIATION...
WINDS WERE AROUND 25 TO 40 KNOTS AROUND 1500 FEET AWAY FROM THE
COASTAL COUNTIES. OTHERWISE...THE NAMBUFR AND RAP13 SOUNDINGS SHOW
PATCHY GROUND FOG MAY BECOME MORE WIDESPREAD AFTER ABOUT 10Z. AT
LEAST MVFR AND POSSIBLY IFR/LIFR MAY BE PREVALENT BETWEEN 10Z AND
15Z. THE FORECAST SOUNDINGS ALSO INDICATE THAT VFR MAY NOT DEVELOP
AFTER 17Z. A FRONTAL BOUNDARY WILL THEN MOVE INTO SOUTHEAST TEXAS
TOWARD THE EARLY EVENING.

40

&&

.PREV DISCUSSION... /ISSUED 947 PM CST WED JAN 28 2015/

UPDATE...

WILL ISSUE A DENSE FOG ADVISORY FOR AREAS SOUTHWEST OF HOUSTON.
VISIBILITIES HAVE BEGUN TO DROP AND WINDS HAVE RELAXED A BIT. 43

PREV DISCUSSION... /ISSUED 823 PM CST WED JAN 28 2015/

UPDATE...
SEE EVENING UPDATE.

DISCUSSION...
AT 8 PM...SURFACE HIGH PRESSURE WAS LOCATED OVER THE NORTHERN GULF
COAST WITH A TROUGH LOW PRESSURE EXTENDING FROM EASTERN KANSAS
INTO NORTH CENTRAL TEXAS. THE PRESSURE GRADIENT BETWEEN THESE TWO
FEATURES IS RATHER TIGHT SO NOT EXPECTING WINDS TO FULLY DECOUPLE
OVERNIGHT. SFC TEMPS HAVE FALLEN TO NEAR THE DEW PT OVER THE SW
ZONES AND RAP13 FCST SOUNDINGS SHOW A VERY FAVORABLE PROFILE FOR
FOG DEVELOPMENT TONIGHT. THE HRRR IS HINTING AT FOG WITH
VISIBILITIES DROPPING TO BELOW A 1/2 MILE TONIGHT BUT JUST NOT
CONFIDENT ENOUGH TO GO WITH DENSE FOG AT THIS TIME DUE TO THE
SLIGHTLY STRONGER WINDS. WILL WATCH TRENDS CLOSELY AND IF WINDS
RELAX...A DENSE FOG ADVISORY MAY BE REQUIRED FOR THE SW HALF OF
THE REGION. 43

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      53  72  43  57  45 /   0  10  10  10  20
HOUSTON (IAH)              54  73  47  60  46 /   0  10  10  10  10
GALVESTON (GLS)            56  70  51  57  50 /   0  10  10  10  10

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...DENSE FOG ADVISORY UNTIL 9 AM CST THURSDAY FOR THE FOLLOWING
     ZONES: BRAZORIA...FORT BEND...GALVESTON...JACKSON...
     MATAGORDA...WHARTON.

GM...NONE.
&&

$$

DISCUSSION...43
AVIATION/MARINE...40


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