Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 181645
AFDHGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1145 AM CDT SAT APR 18 2015

.DISCUSSION...
A STATIONARY FRONT WAS LOCATED JUST OFFSHORE ALONG THE COAST. THE
AIRMASS ALONG ABOUT A TWO-TIER COUNTY WIDTH ALONG THE COAST WAS
FAIRLY MOIST. NAMBUFR MODEL SOUNDINGS SHOW INCREASING INSTABILITY
DURING THE AFTERNOON WITH HEATING AND AS THE FRONTAL BOUNDARY
DRIFTS BACK INLAND. WATER VAPOR OVER THE PAST FEW HOURS SHOWED AN
APPROACHING SHORTWAVE TROUGH MOVING TOWARD THE AREA FROM THE
SOUTH. THE 06Z TEXAS TECH WRF AND 15Z HRRR BOTH FORECASTED BEST
CHANCES STARTING NEAR THE COAST BASICALLY ALONG AND EAST OF THE
HIGHWAY 59 CORRIDOR FROM MID AFTERNOON THROUGH MID EVENING.
ANOTHER UPPER LEVEL SHORTWAVE TROUGH WILL MOVE ACROSS SE TEXAS
LATE THIS EVENING FROM THE WEST. THIS MAY HELP GENERATE ADDITIONAL
SCATTERED STORMS DURING THE LATE EVENING AND INTO THE OVERNIGHT
PERIOD.

TWEAKED RAIN CHANCES MAINLY FOR TONIGHT AND ALSO TEMPERATURES FOR
TODAY.

40

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      79  62  85  56  75 /  30  40  10   0   0
HOUSTON (IAH)              80  64  84  60  78 /  50  30  20  10   0
GALVESTON (GLS)            77  69  81  67  75 /  40  30  20  20   0

&&

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

$$

DISCUSSION...40
AVIATION/MARINE...41



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