492
FXUS64 KBRO 210827
AFDBRO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
227 AM CST SAT NOV 21 2009
DISCUSSION
MIDLEVEL LOW CROSSING TEXAS CURRENTLY WITH SFC REFLECTION
BEGINNING TO EJECT NEWD ACROSS THE NW GULF. DRY SLOT WRAPPING
INTO DEEP SOUTH TEXAS WILL HAVE SKIES CLEAR AREAWIDE BY SUNRISE.
COOLER AIR BEHIND THE FRONT AND CLEAR SKIES WILL LEAD TO CHAMBER
OF COMMERCE WEATHER FOR THE REGION TODAY. GULF MOISTURE WILL BEGIN
TO RETURN LATE MONDAY AS SOUTHEAST FLOW WRAPS AROUND DEPARTING SFC
HIGH PRESSURE. MODELS INDICATE TAIL END OF THE NEXT FRONTAL
BOUNDARY MOVING INTO THE REGION LATER TUESDAY. THE MAIN UPPER
LEVEL DYNAMICS WILL REMAIN WELL TO THE NORTH...BUT THE SUBTROPICAL
JET JUST TO THE SOUTH MAY PROVIDE SOME LIFT EITHER FROM ENTRANCE
REGION LIFT OR EMBEDDED SHORTWAVES. WILL CONTINUE WITH CHANCE POPS
FOR THE REGION TUESDAY INTO WEDNESDAY MORNING WITH HIGH PRESSURE
AND PROMPT DRYING LATER WEDNESDAY INTO THANKSGIVING MORNING.
TEMPERATURES WILL BE NEAR NORMAL IN THE LOWER TO MIDDLE 70S...WITH
ONLY HIGH CLOUDINESS FROM SUBTROPICAL JET.
AVIATION
WIDESPREAD IFR CIGS WITH AREAS OF LIFR OCCURRING ACROSS DEEP
SOUTH TEXAS AND SHUD REMAIN AT IFR THRESHOLDS THROUGH 09Z TO
11Z...CIGS SLOWLY RISING BY DAWN. NO VSBY RESTRICTIONS ARE
ANTICIPATED. A STEADILY CLEARING OF CLOUDS XPCTD BY NOON TODAY.
LIGHT TO MODERATE NORTHWEST FLOW SHOULD DOMINATE LATER TODAY.
MARINE
AT 1 AM BUOY 20 REPORTED NORTHWEST WINDS AT 23 KNOTS WITH GUSTS
TO 29 KNOTS...SEAS AT 8.2 FEET WITH AN 8 SECOND PERIOD. THE COLD
FRONT IS EXITING THE REGION NOW WITH HIGH PRESSURE SETTLING IN THE
REGION BY AFTERNOON. HAVE EVEN EXTENDED THE SCA FOR ALL LWR TX
GULF WATERS THRU 15Z TODAY. IMPROVING MARINE CONDITIONS ARE XPCTD
LATER TODAY WITH EXCELLENT CONDITIONS BY SUNDAY. A STEADY
DETERIORATION OF MARINE CONDITIONS THEN BEGINS LATE MONDAY WITH
ANOTHER FRONT APPROACHING. SMALL CRAFT ADVISORIES ARE POSSIBLE FOR
TUESDAY AND WEDNESDAY.
PRELIMINARY POINT TEMPS/POPS
BAYVIEW/PORT ISABEL 76 57 77 64 / 0 0 0 10
BROWNSVILLE 79 56 79 61 / 0 0 0 10
HARLINGEN 78 53 80 61 / 0 0 0 10
MCALLEN 80 57 79 63 / 0 0 0 10
RIO GRANDE CITY 80 57 78 64 / 0 0 0 10
SOUTH PADRE ISLAND 75 60 73 67 / 0 0 0 10
BRO WATCHES/WARNINGS/ADVISORIES
TX...NONE.
GM...SMALL CRAFT ADVISORY UNTIL 10 AM CST THIS MORNING FOR GMZ150-155-
170-175.
THIS PRODUCT IS ALSO AVAILABLE ON THE WEB AT:
HTTP://WWW.WEATHER.GOV/BROWNSVILLE
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