Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS64 KHGX 291049
AFDHGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
449 AM CST THU JAN 29 2015

.DISCUSSION...
A DENSE FOG ADVISORY IS IN EFFECT FOR THE SOUTHERN HALF OF THE
FORECAST AREA THROUGH 10 AM CST. DENSE FOG IS BLANKETING THE (NEAR)
COASTAL COUNTIES EARLY THIS MORNING...VISIBILITIES WILL PERIODICALLY
FALL TO A 1/2 MILE OR BELOW OVER THE NEXT 4 OR 5 HOURS. LIGHT WINDS
WILL VEER AROUND THE WESTERN EDGE OF THE DIAL AS SOUTHEASTERN
TEXAS FALLS JUST DOWNSTREAM OF AN APPROACHING COLD FRONT. PARTIAL
(MID TO HIGH LEVEL) CLOUDINESS WITH A GENERAL WESTERLY BREEZE WILL
AID IN DRIVING AFTERNOON TEMPERATURE READINGS UP INTO THE AVERAGE
MIDDLE 70S. THE DRY BOUNDARY WILL PASS ACROSS THE CWA THROUGH THE
EVENING...REACHING THE NORTHWESTERN COUNTIES SHORTLY AFTER SUNSET
AND TO THE COAST AROUND MIDNIGHT. COLD AND DRY AIR ADVECTION WILL
PUSH FRIDAY TEMPERATURES AND DEW POINTS DOWN INTO THE 40S UNDER
MID TO HIGH LEVEL CEILINGS.

THE BROAD UPPER TROUGH EVOLVING OVER THE BAJA REGION WILL SLOWLY
ADVANCE EASTWARD THROUGH THE WEEKEND...ENHANCING THE LOCAL WARM
AIR ADVECTION PATTERN. SATURDAY`S EASTERLY WINDS WILL ROTATE
ONSHORE BY LATE EVENING...INCREASING LOW LEVEL MOISTURE...WITH JET
POSITIONING PARALLEL TO THE COASTLINE IMPROVING UPPER LEVEL DIFFULENCE
BY SUNDAY. SURFACE TROUGHING FORMING OVER EASTERN TEXAS JUST AHEAD
OF A STRONG SUNDAY COLD FRONTAL PASSAGE...WITH LOBES OF HIGHER
PVA MOVING OUT AHEAD OF THE MAIN 5H TROF AXIS WILL INCREASE WEEKEND
POPS INTO THE HIGH OR LIKELY CATEGORY. AVERAGE TWO DAY QPF WILL
RANGE FROM AROUND A 1/4 OF AN INCH TO NEARLY 3/4 OF AN INCH
LOCALLY. RAIN BEHAVIOR OF MAINLY SHOWERS WILL DEVELOP FROM WEST TO
EAST SATURDAY AFTERNOON WITH AN OVERNIGHT BREAK INTO SUNDAY...MORE
OF A MODERATE AREAWIDE RAIN EPISODE THROUGH THE DAY SUNDAY. THE
PASSING COLD FRONT WILL SCOUR OUT RAINFALL SUNDAY EVENING...THE
BACKING COLD AIR MASS WILL MAKE FOR A CHILLY MONDAY THAT WILL
LIKELY NOT BREAK OUT OF THE 40S. THE SLOWER PASSAGE OF THE UPPER
TROUGH AXIS WEDNESDAY WILL MAINTAIN MODERATE CHANCE MID WEEK POPS.
SHORTWAVE DISTURBANCES PASSING UP FROM THE SOUTHWEST ALONG WITH
DEVELOPING WESTERN GULF LOW PRESSURE...AND AN INCREASINGLY MOIST
ATMOSPHERE (ONSHORE FLOW RETURNS TUESDAY)...WILL HAVE THE CHANCE
OF RAIN LINGERING ON THROUGH DAYS 6 AND 7. THE PERIOD ENDS MORE
WET...OVERCAST AND COOL AS DAYS ONLY WARM INTO THE 50S FROM MORNING
40S. 31

&&

.MARINE...
NO BIG CHANGES TO THE ONGOING MARINE FCST. LIGHT ONSHORE WINDS
AND LOW SEAS WILL PERSIST TODAY. A WEAK COLD FRONT WILL PUSH OFF
THE COAST LATE TONIGHT WITH MODERATE NORTHEAST WINDS DEVELOPING IN
ITS WAKE...WILL PROBABLY NEED CAUTION FLAGS IN ITS WAKE. WINDS
WILL THEN VEER TO THE EAST AND SOUTHEAST OVER THE WEEKEND AHEAD OF
A STRONG FRONT EXPECTED TO INTO THE GULF WATERS SUNDAY EVENING.
SMALL CRAFT ADVISORIES ARE LIKELY IN THE WAKE OF THIS SECOND
FRONT. 47

&&

.AVIATION...AREAS OF FOG/LOW CIGS WILL START ERODING BETWEEN 15-17Z.
IN THE MEANTIME PATCHY LIFR CONDITIONS WILL BE POSSIBLE ESP METRO
AREAS AND LOCATIONS CLOSER TO COAST. VFR THIS AFTN. FRONTAL BOUNDARY
WILL BE MOVING INTO CLL, UTS, CXO TERMINALS 20-24Z AND TO NEAR THE
COAST AROUND MIDNIGHT. WOULDN`T DOUBT IF WE SEE SOME FOG
REDEVELOPMENT CLOSER TO THE COAST PRIOR TO FROPA. PROBABLY JUST
SOME MID/HIGH LVL CIGS IN ITS WAKE. 47

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      75  44  58  42  57 /   0  10  10  20  40
HOUSTON (IAH)              75  47  60  43  59 /   0  10  10  10  40
GALVESTON (GLS)            67  51  57  50  58 /   0  10  10  10  30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...DENSE FOG ADVISORY UNTIL 10 AM CST THIS MORNING FOR THE FOLLOWING
     ZONES: AUSTIN...BRAZORIA...CHAMBERS...COLORADO...FORT BEND...GALVESTON
     ...GRIMES...HARRIS...JACKSON...LIBERTY...MATAGORDA...WHARTON.

GM...NONE.

&&

$$

DISCUSSION...31



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.