Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 230000
AFDHGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
600 PM CST THU JAN 22 2015

.AVIATION...
MAIN AVIATION CONCERN WILL CENTER AROUND LOW-END MVFR CEILINGS AT
THE TERMINALS AS WELL AS GUSTY NORTHERLY WINDS.

HEAVIEST RAIN ACTIVITY FROM EARLIER TODAY HAS CLEARED THE
TERMINALS...BUT LIGHT RAIN WILL STILL BE POSSIBLE THROUGH FRIDAY
AFTERNOON AS AN UPPER LEVEL DISTURBANCE MOVES ACROSS THE STATE.
RAIN COVERAGE WILL BE MUCH LESS THAN TODAY...AS MVFR CEILINGS
PREVAIL WITH TEMPORARY DROPS TO IFR IN HEAVIER SHOWERS. LOW
CEILINGS ARE EXPECTED TO PERSIST THROUGH FRIDAY AFTERNOON BEFORE
DRIER AIR FILTERING INTO THE AREA BEHIND THE PASSING UPPER LEVEL
DISTURBANCE SCOURS OUT LOW CLOUDS FRIDAY EVENING.
ADDITIONALLY...GUSTY NORTHERLY WINDS /GUSTS NEAR 20 KNOTS AT
INLAND SITES TO NEAR 30 KNOTS AT COASTAL TERMINALS/ WILL PERSIST
THROUGH AT LEAST THE OVERNIGHT HOURS AS A STRONG SURFACE LOW OVER
THE GULF SHIFTS NORTHEAST.

HUFFMAN

&&

.PREV DISCUSSION... /ISSUED 319 PM CST THU JAN 22 2015/

DISCUSSION...
THE COMBINATION OF AN UPPER LEVEL TROUGH APPROACHING WEST TEXAS
AND A SURFACE LOW AND FRONT AT THE UPPER TEXAS COAST BROUGHT AN
ABUNDANCE OF RAINFALL TO SE TEXAS TODAY. THE SURFACE LOW WAS
LOCATED JUST OFF THE COAST AT 2 PM. THE HEAVIEST RAINFALL OVER
LAND WAS MOVING EAST OF INTERSTATE 45 WHILE THE BEST RAINFALL OFF
THE COAST WAS LOCATED ALONG AND EAST OF THE FRONTAL BOUNDARY. THE
WIDESPREAD RAINFALL WILL DECREASE IN COVERAGE THIS EVENING AS THE
COASTAL FRONT MOVES EAST OF THE STATE.

CHANCES OF RAIN WILL PERSIST AS THE UPPER TROUGH MOVES OVER SE
TEXAS ON FRIDAY. WITH THE EXIT OF THIS SYSTEM...EXPECT THE RAIN
CHANCES END FRIDAY AFTERNOON AND EVENING. SKIES SHOULD ALSO BEGIN
CLEARING LATE FRIDAY INTO FRIDAY NIGHT.

AN UPPER LEVEL NORTHWESTERLY FLOW PATTERN WILL THEN DEVELOP OVER
THE WEEKEND...AND THEN GIVE WAY TO A BUILDING RIDGE OF HIGH
PRESSURE. THIS WILL CAUSE THE BELOW NORMAL TEMPERATURES ON FRIDAY
AND SATURDAY TO MODERATE DURING FIRST HALF OF THE UPCOMING WEEK.

40

CLIMATE...
HERE ARE SOME RAINFALL TOTALS FROM MIDNIGHT THROUGH 3 PM TODAY...

KHGX...2.50
KIAH...0.85
KHOU...2.24
KGLS...2.34
KCLL...2.83
KCXO...0.95
KUTS...1.07
KLBX...3.24
KPSX...2.66

40

MARINE...
A SMALL CRAFT ADVISORY IS CURRENTLY IN EFFECT. THE STATIONARY
FRONT IS CURRENTLY POSITIONED JUST OFFSHORE AND EXPECT NORTHERLY
WINDS OF 20-25 KNOTS WITH HIGHER GUSTS...POSSIBLY APPROACHING GALE
FORCE...AS THE FRONT CONTINUES TO MOVE OVER THE COASTAL WATERS.
TIDE LEVELS WILL FALL TO NEAR NORMAL VALUES LATER TONIGHT AND
FRIDAY. CALMER WINDS AND SEAS CAN BE EXPECTED OVER THE WEEKEND. 13

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      40  49  35  59  39 /  50  50  10  10  10
HOUSTON (IAH)              43  49  37  59  38 /  60  30  10  10  10
GALVESTON (GLS)            44  51  42  57  47 /  70  30  10  10  10

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...WIND ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR THE FOLLOWING
     ZONES: BRAZORIA...CHAMBERS...GALVESTON...JACKSON...
     MATAGORDA.

GM...SMALL CRAFT ADVISORY UNTIL 6 AM CST FRIDAY FOR THE FOLLOWING
     ZONES: GALVESTON BAY...MATAGORDA BAY.

     SMALL CRAFT ADVISORY UNTIL 7 PM CST FRIDAY FOR THE FOLLOWING
     ZONES: WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL
     20 NM TO 60 NM...WATERS FROM FREEPORT TO THE MATAGORDA SHIP
     CHANNEL OUT 20 NM...WATERS FROM HIGH ISLAND TO FREEPORT 20
     TO 60 NM...WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM.

&&

$$



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