Blowing Dust Advisory 2, NWS Brownsville, TX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
354 AM CDT WED AUG 7 2013

.SHORT TERM /TODAY THROUGH THURSDAY/...TODAY APPEARS TO BE A
REPEAT OF YESTERDAY WITH VERY HOT AND BREEZY TO WINDY CONDITIONS
EXPECTED ACROSS THE RIO GRANDE VALLEY AS THE 500MB RIDGE ACROSS
TEXAS AND NORTHERN MEXICO CONTINUES TO PROVIDE STRONG SUBSIDENCE
ACROSS THE AREA. WITH DEWPOINTS IN THE 60S ACROSS THE CWA
TODAY...HEAT INDEX VALUES WILL EASILY REACH 105 TO 110 DEGREES
THIS AFTERNOON WITH ISOLATED AREAS REACHING 111 DEGREES. WILL
ISSUE SPS TO ADDRESS THE HEAT INDEX TEMPS FOR TODAY AND THURSDAY.
THE OTHER CONCERN IS THE WINDS ALONG THE COASTAL SECTIONS THIS
AFTERNOON. WITH WINDS GUSTING TO NEAR 25 MPH ALONG THE
COAST...BLOWING SAND AND DUST WILL REDUCE VISIBILITIES ACROSS THE
COASTAL SECTIONS OF CAMERON COUNTY TODAY. WILL ISSUE NPW FOR
BLOWING DUST/SAND ACROSS THE LOWER TEXAS COAST.

WINDS SHOULD DIMINISH ACROSS THE RIO GRANDE VALLEY TONIGHT AS THE
PRESSURE GRADIENT BEGINS TO DIMINISH ACROSS THE LOWER TEXAS COAST.
THE VERY HOT TEMPERATURES WILL PERSIST THURSDAY EVEN AS THE UPPER
LEVEL RIDGE ACROSS THE AREA BECOMES ELONGATED ACROSS THE NORTHWEST
GULF COAST STATES. BELIEVE WINDS SHOULD NOT BE AS STRONG THURSDAY AS
TODAY SO THE BLOWING DUST/SAND SHOULD ALSO DIMINISH. HAZY CONDITIONS
WILL PERSIST TODAY THROUGH THURSDAY AS THE AFRICAN DUST ACROSS THE
NORTHWEST CARIBBEAN SEA EXTENDING INTO THE WESTERN GULF OF MEXICO
CONTINUES TO MOVE ACROSS THE CWA.

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...THE MIGHTY H5 RIDGE
WILL START TO FLATTEN BEGINNING ON FRIDAY...SQUEEZED BETWEEN A
TROUGH TO THE NORTH AND THE TUTT MOVING INTO THE GULF. MODELS SHOW
A SHARP RISE IN MOISTURE BEGINNING LATE FRIDAY...RISING ABOVE 2
INCHES BY DAWN SATURDAY. MOISTURE INCREASES AND INSTABILITY ALOFT
WILL BRING OUR FIRST REAL CHANCE OF RAIN IN NEARLY A MONTH. HAVE
INCREASED POPS FURTHER INTO THE CHANCE CATEGORY FOR SATURDAY AND
SUNDAY...AND STARTING TO LOOK MORE LIKELY FOR ANOTHER ROUND ON
MONDAY WITH THE SEABREEZE. THE RIDGE BUILDS BACK INTO PLACE
BRIEFLY ON TUESDAY BEFORE THE NEXT INVERTED TROUGH SWEEPS
WESTWARD ACROSS THE GULF.

&&

.MARINE...
TODAY THROUGH THURSDAY...SEAS WERE NEAR 5 FEET WITH SOUTH WINDS NEAR
17 KNOTS AT BUOY020 EARLY THIS MORNING. MODERATE TO STRONG SOUTH
WINDS WILL PREVAIL ACROSS THE COASTAL WATERS TODAY INTO TONIGHT
BEFORE THE PRESSURE GRADIENT WEAKENS ACROSS THE WESTERN GULF OF
MEXICO THURSDAY. WILL GO AHEAD AND ISSUE SMALL CRAFT ADVISORY FOR
THE LAGUNA MADRE AND THE NEAR SHORE WATERS OF THE LOWER TEXAS COAST
TODAY AND WORD SCEC FOR THE FAR OFFSHORE WATERS.

FRIDAY THROUGH SUNDAY...WINDS RELAX AS THE LOW IN CENTRAL TEXAS
WEAKENS. ONSHORE FLOW AROUND 10 KNOTS WILL CONTINUE THROUGH THE
WEEKEND...ALLOWING SEAS TO LOWER TO 2 TO 4 FEET.

&&

.FIRE WEATHER...LOW RELATIVE HUMIDITY ACROSS THE WESTERN HALF OF THE
CWA IN COMBINATION WITH 20FT WINDS OF 15 TO 20 KNOTS WILL PROVIDE AN
ELEVATED RISK OF WILDFIRE SPREAD ALONG AND WEST OF HIGHWAY 281 THIS
AFTERNOON. WILL ISSUE AN RFD TO ADDRESS THE WILDFIRE SPREAD
POTENTIAL.
&&

.PRELIMINARY POINT TEMPS/POPS...
BAYVIEW/PORT ISABEL  97  80  97  79 /   0   0   0   0
BROWNSVILLE          99  79  97  79 /   0   0   0   0
HARLINGEN           102  78 100  78 /   0   0   0   0
MCALLEN             104  80 101  80 /   0   0   0   0
RIO GRANDE CITY     106  79 102  79 /   0   0   0   0
SOUTH PADRE ISLAND   91  81  91  80 /   0   0   0   0

&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT ADVISORY GMZ130>135 10AM THROUGH 7PM CDT WEDNESDAY.
&&

THIS PRODUCT IS ALSO AVAILABLE ON THE WEB AT:
HTTP://WWW.WEATHER.GOV/BROWNSVILLE

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HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BROWNSVILLE TX
433 PM CDT TUE AUG 6 2013

TXZ248>257-072145-
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
433 PM CDT TUE AUG 6 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS.

.DAY ONE...REST OF TODAY AND TONIGHT.

HEAT INDICES OF 105 TO 108 DEGREES IS EXPECTED DURING THE LATE
MORNING THROUGH EARLY EVENING HOURS.

AN ELEVATED FIRE DANGER IS EXPECTED FOR BROOKS...JIM HOGG...
HIDALGO...STARR AND ZAPATA COUNTIES TODAY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

HEAT INDICES OF 108 TO 110 DEGREES IS EXPECTED DURING THE LATE
MORNING THROUGH EARLY EVENING HOURS.

AN ELEVATED RISK OF RIP CURRENTS IS POSSIBLE AT THE BEACHES OF
SOUTH PADRE ISLAND AND AT BOCA CHICA BEACH WEDNESDAY AND LOWERING
THROUGH THE REMAINDER OF THE WEEK AND INTO NEXT WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

GMZ130-132-135-150-155-170-175-072145-
LAGUNA MADRE FROM THE PORT OF BROWNSVILLE TO THE ARROYO COLORADO-
LAGUNA MADRE FROM THE ARROYO COLORADO TO 5 NM NORTH OF PORT
MANSFIELD TX-
LAGUNA MADRE FROM 5 NM NORTH OF PORT MANSFIELD TO BAFFIN BAY TX-
COASTAL WATERS FROM PORT MANSFIELD TO THE RIO GRANDE OUT 20 NM-
COASTAL WATERS FROM BAFFIN BAY TO PORT MANSFIELD OUT 20 NM-
WATERS FROM PORT MANSFIELD TO THE RIO GRANDE EXTENDING FROM 20 TO
60 NM-
WATERS FROM BAFFIN BAY TO PORT MANSFIELD EXTENDING FROM 20 TO
60 NM-
433 PM CDT TUE AUG 6 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE GULF OF MEXICO AND THE
LAGUNA MADRE.

.DAY ONE...TONIGHT.

SMALL CRAFT ADVISORIES ARE POSTED FOR THE LAGUNA MADRE UNTIL 9 PM
AND FOR THE GULF WATERS UNTIL 1 AM.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

SMALL CRAFT ADVISORIES ARE LIKELY FOR THE LAGUNA MADRE WEDNESDAY
AND POSSIBLY THURSDAY. THE GULF WATERS MAY SEE SMALL CRAFT
ADVISORIES ISSUED FOR WEDNESDAY AFTERNOON AND EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.