Wind Chill Advisory 3, NWS Brownsville, TX

895 
WWUS44 KBRO 051034
WSWBRO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BROWNSVILLE TX
434 AM CST THU MAR 5 2015

...VERY LOW WIND CHILLS EXPECTED THROUGH FRIDAY MORNING...

.AN ARCTIC COLD FRONT MOVED THROUGH DEEP SOUTH TEXAS EARLY THIS
MORNING. SHALLOW COLD AIR WILL CONTINUE FILTERING INTO THE AREA
TODAY THROUGH EARLY FRIDAY. THE TEMPERATURES WILL FALL DRASTICALLY
IN THE WAKE OF THE FRONT. THE STRONG NORTH WINDS WILL COMBINE WITH
THE LOW TEMPERATURE READINGS TO PRODUCE LOW WIND CHILL VALUES
ACROSS ALL OF DEEP SOUTH TEXAS THROUGH FRIDAY MORNING. 

TXZ248>257-051845-
/O.EXT.KBRO.WC.Y.0003.150305T1200Z-150306T1500Z/
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
INCLUDING THE CITIES OF...ZAPATA...HEBBRONVILLE...FALFURRIAS...
SARITA...RIO GRANDE CITY...ROMA...MCALLEN...EDINBURG...PHARR...
MISSION...WESLACO...RAYMONDVILLE...BROWNSVILLE...HARLINGEN...
PORT MANSFIELD...PORT ISABEL...SOUTH PADRE ISLAND...
LAGUNA HEIGHTS...LAGUNA VISTA
434 AM CST THU MAR 5 2015

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 9 AM CST FRIDAY...

* WIND CHILL VALUES WILL RANGE FROM 23 AND 28 DEGREES ACROSS THE
  NORTHERN RANCH LANDS AND FROM 25 AND 30 DEGREES ACROSS THE RIO
  GRANDE VALLEY THROUGH FRIDAY MORNING.

* OTHER IMPACTS...BEING OUTSIDE WITH EXPOSED SKIN OR CLOTHING 
  INSUFFICIENT TO PROTECT SOMEONE FROM THESE COLD WIND CHILLS 
  COULD RESULT IN HEALTH PROBLEMS. CHILDREN AND ADULTS STANDING 
  OUTSIDE FOR LONG DURATION...SUCH AS AT BUS STOPS SHOULD TAKE 
  EXTRA PRECAUTIONS TO STAY WARM. PETS AND LIVESTOCK MAY BECOME 
  STRESSED DUE TO THE COLD TEMPERATURES. MAKE SURE ADEQUATE 
  SHELTER IS AVAILABLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY IS ISSUED WHEN WIND CHILL INDEX VALUES WILL
DROP TO 30 OR LOWER FOR AT LEAST 2 HOURS FOR THE RIO GRANDE
VALLEY AND 25 DEGREES OR LOWER FOR 2 OR MORE HOURS FOR THE RIO
GRANDE PLAINS AND NORTHERN RANCHLANDS...WITH WINDS OF 10 MPH OR
GREATER.

&&

$$

694 
WWUS44 KBRO 051809
WSWBRO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1209 PM CST THU MAR 5 2015

...TEMPERATURES NOT AS COLD AS EXPECTED...

.WINDS ARE SLOWLY DIMINISHING AND TEMPERATURES HAVE NOT DROPPED AS
LOW AS EXPECTED THIS WILL KEEP WINDS CHILLS TEMPERATURES JUST
ABOVE ADVISORY LEVELS. 



TXZ248>257-051915-
/O.CAN.KBRO.WC.Y.0003.000000T0000Z-150306T1500Z/
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
INCLUDING THE CITIES OF...ZAPATA...HEBBRONVILLE...FALFURRIAS...
SARITA...RIO GRANDE CITY...ROMA...MCALLEN...EDINBURG...PHARR...
MISSION...WESLACO...RAYMONDVILLE...BROWNSVILLE...HARLINGEN...
PORT MANSFIELD...PORT ISABEL...SOUTH PADRE ISLAND...
LAGUNA HEIGHTS...LAGUNA VISTA
1209 PM CST THU MAR 5 2015

...WIND CHILL ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS CANCELLED THE
WIND CHILL ADVISORY. 

WINDS CHILLS BETWEEN 30 AND 39 DEGREES CAN BE EXPECTED THE
REMAINDER OF THE AFTERNOON.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
257 PM CST WED MAR 4 2015

.SHORT TERM /NOW THROUGH THURSDAY NIGHT/...THE INFAMOUS COLD FRONT
CURRENTLY LIES ALONG A SHREVEPORT...TEMPLE...JUNCTION TO NORTH OF
DEL RIO LINE. STEADY SOUTHWARD PROGRESS SURGES THE FRONT THROUGH THE
NORTHERN COUNTIES BETWEEN MIDNIGHT AND 3AM AND THE RGV 3 TO 6 AM.
TEMPERATURES IN THE 20S AND 30S OVER NORTH TEXAS WILL BE HEADING OUR
WAY WITH AT LEAST A 24-36 HOUR PERIOD OF COLD AIR ADVECTION.
FORECAST REMAINS DIFFICULT TO DIGEST WITH A LOT GOING ON IN A SHORT
AMOUNT OF TIME.

WILL HIGHLIGHT THE BIGGEST IMPACTS. THE SHARP TEMPERATURES CONTRAST
IS STILL ON TAP WITH TEMPERATURES TO REMAIN IN THE 60S OR NEAR 70
MUCH OF THE NIGHT THEN TUMBLE VERY QUICKLY WITH AN EXPECTED 20-30
DEGREE DROP IN TEMPERATURES 3 TO 5 HOURS. GFS/NAM GUIDANCE SHOW A
20+ DEGREE DROP IN THE LOWER VALLEY BETWEEN 6 AND 9 AM THURSDAY AND
THEN CONTINUE FALLING THROUGH MID DAY. EXPECT UP TO A 40+ DEGREE
DOWNWARD CHANGE IN AMBIENT TEMPERATURES FROM TODAY THROUGH THURSDAY.

WINDS AND WIND CHILLS NEXT...TIGHT PRESSURE GRADIENT ACROSS TEXAS
AND JUST BEHIND THE FRONT AND STILL ARCTIC HIGH PRESSURE AT 1040MB
TO MOVE INTO STATE THURSDAY. NORTHERLY WINDS TO INCREASE RAPIDLY
WITH THE INITIAL SURGE OF THE FRONT WITH AT LEAST 20 TO 30 MPH AND
HIGHER GUSTS. GRADIENT STRENGTHENS THROUGH AT LEAST NOON WITH WINDS
UP ANOTHER NOTCH POSSIBLY REACHING WIND ADVISORY LEVELS ALONG THE
COAST COUNTIES. THIS WILL MATCH UP WELL WITH THE ON GOING GALE
WARNING ISSUED LAST NIGHT. MODEL GUIDANCE HAS ALSO BEEN INDICATING 3
TO 6 HOURS OF ADVISORY LEVELS WINDS AND THE MAV AND MET USUALLY DO
WELL WITH THE LOCAL WINDS. AS THE WINDS INCREASE AND TEMPS DROP LIKE
A ROCK WINDS CHILLS TO GO LOW. WIND CHILL ADVISORIES WILL BE ISSUED
FOR ALL OF THURSDAY AND MAY HAVE TO BE EXTENDED THROUGH THURSDAY
NIGHT IF WINDS REMAIN HIGH ENOUGH.

RAINFALL AND POTENTIAL FOR FREEZING RAIN...OF THE MOST CONCERN BUT
LATE IN THE FORECAST PERIOD IS THE CHANCE OF RAIN FREEZING RAIN AND
OR DRIZZLE IN THE MID AND LOWER VALLEY LATE THURSDAY NIGHT INTO
FRIDAY MORNING. FIRST RAIN TO INCREASE IN COVERAGE AS THE FRONT
PASSES TO THE SOUTH. OVERRUNNING CONDITIONS TO DEVELOP RATHER RAPIDLY
IN WAKE OF THE FRONT WITH THE WARM AIR BEING FORCED OVER THE TOP OF
THE DEEPENING COLD AIR. RAIN AMOUNTS MAY NOT BE MUCH A FEW HUNDREDTHS
AT BEST BUT MOST AREAS SHOULD SEE SOME RAIN. POPS WERE INCREASED TO
60 TO 80 PERCENT FOR THURSDAY AND CONFIDENCE IS HIGH ENOUGH TO
WARRANT 100 PERCENT. TEMPERATURES CONTINUE TO FALL SLIGHTLY
THURSDAY NIGHT AND DEW POINTS CONTINUE TO CRASH INTO FRIDAY
MORNING. THE DRIER AIR WILL PUSH THE DEEPER MOISTURE SOUTH LETTING
THE NORTHERN AND WESTERN RANCHLANDS TO DRY OUT. THE COASTAL SECTIONS
CONTINUE OVER THE DEEPER MOISTURE WITH A SHARP INVERSION AND DEEP
LAYER MOISTURE. EVAPORATIVE COOLING IS LIKELY TO TAKE PLACE AS
PRECIPITATION CONTINUES TO FALL THROUGH THIS LAYER AND WITH DEW
POINTS FALLING BETWEEN 25-29 DEGREES AMBIENT TEMPERATURES COULD FALL
TO THE WET BULB WHICH IS FORECAST TO LOWER BETWEEN 30-32 DEGREES.
THIS BRINGS UP THE THREAT OF SOME FREEZING RAIN/DRIZZLE. AN SPS HAS
BEEN ISSUED TO COVER THE DETAILS AND CONFIDENCE ON THIS EVENT. NO
ADVISORIES OR WARNINGS ARE ISSUED YET BUT FURTHER INTERROGATION OF
THE NEXT TWO MODEL RUNS MAY SHED SOME LIGHT ON THIS ISSUE.

.LONG TERM /FRIDAY THROUGH TUESDAY/...AN ARCTIC SOURCE AIRMASS
ARRIVING THURSDAY WILL CONTINUE TO SETTLE OVER DEEP SOUTH TEXAS
EARLY IN THE LONG TERM. CAA WILL CONTINUE ACROSS THE AREA THROUGH
SATURDAY. SOUTHWEST WINDS ALOFT...ANCHORED BY A MID LEVEL LOW OVER
BAJA CALIFORNIA AND NORTHWEST MEXICO WILL SUPPORT OVERRUNNING...
PERSISTENT CLOUDY SKIES WITH PATCHY DRIZZLE AND LIGHT RAIN THROUGH
SATURDAY MORNING.

TEMPERATURES WILL BE WELL BELOW NORMAL...WITH SPECIAL HAZARDS FRIDAY
MORNING. A VERY COLD AIR MASS WILL ARRIVE THU MORNING...LOWERING
TEMPERATURES SIGNIFICANTLY. THURSDAY NIGHT TEMPERATURES FOR THE LWR
VALLEY...INCLUDING THE COUNTIES OF CAMERON...WILLACY...HIDALGO AND
THE SOUTHERN PORTIONS OF KENEDY AND BROOKS COUNTIES...WILL DECREASE
TO JUST ABOVE FREEZING BY THE PREDAWN HOURS OF FRIDAY. ANY LIGHT
LIQUID PRECIPITATION WILL HAVE A CHANCE TO EVAPORATE AS IT FALLS
THROUGH DRIER AIR NEAR THE SFC...ALLOWING IT TO POTENTIALLY COOL
ENOUGH TO FREEZE BY THE TIME IT REACHES THE GROUND.

FRIDAY TEMPS WILL WARM INTO THE 40S BUT TEMPERATURES OVERALL WILL
REMAIN WELL BELOW NORMAL THROUGH THE WEEKEND. LOW TEMPERATURES
FRIDAY NIGHT WILL FALL INTO THE 30S ACROSS THE RANCHLANDS TO THE
LOWER 40S NEAR THE COAST. NO FREEZING TEMPERATURES EXPECTED AT THIS
TIME ACROSS DEEP SOUTH TEXAS. HIGH TEMPS SATURDAY WILL SEEM WARM IN
THE 50S EVEN THOUGH 20 DEGREES BELOW NORMAL. A SLOW WARMING TREND
WILL CONTINUE INTO THE EARLY PART OF THE WEEK...WITH NEAR NORMAL
TEMPS FINALLY BACK AROUND TUESDAY.

THE DEVELOPMENT OF A COASTAL TROUGH OFF THE LOWER TEXAS COAST...
ALONG WITH AN APPROACHING A 500MB TROUGH BELOW THE RIGHT ENTRANCE
REGION OF AN EXITING JET STREAK WILL PROVIDE A LINGERING CHANCE OF
RAIN SATURDAY THROUGH MONDAY OR TUESDAY. THE TROUGH WILL MOVE SLOWLY
EAST...STRUGGLING TO MOVE PAST TEXAS...AND RAIN CHANCES WILL LINGER
INTO EARLY NEXT WEEK.

&&

.MARINE...
GALE WARNINGS REMAIN POSTED FOR THE LOWER TEXAS COAST AS WELL AS
THE ENTIRE TEXAS COAST AND ALL OF THE WESTERN AND SOUTHWESTERN
GULF OF MEXICO. THE SIGNIFICANT COLD FRONT EXPECTED BETWEEN
MIDNIGHT AND 6AM WITH GALE FORCE WINDS TO DEVELOP RATHER QUICKLY.
SEAS BECOME HAZARDOUS BY 6 AM THURSDAY IF NOT EARLIER AND WILL
STAY INTENSE THROUGH THURSDAY NIGHT AS STRONG HIGH PRESSURE
REMAINS NORTH OF THE COASTAL WATERS WITH COLD AIR CONTINUES TO
POOR INTO THE REGION. FOG MAY DEVELOP OFFSHORE TONIGHT AS WINDS
SLACKEN IN ADVANCE OF THE FRONT AND MAY BECOME DENSE FOR A SHORT
WHILE BEFORE THE STRONG WINDS ADVANCE SOUTHWARD.

FRIDAY THROUGH SUNDAY...SLOW RECOVERY WILL BE ONGOING IN THE WAKE OF
THE STRONG COLD FRONT OF THURSDAY. HIGH SEAS PERSISTING INTO FRIDAY
EVENING WILL EXTEND SMALL CRAFT ADVISORY CONDITIONS INTO THE LONG
TERM PORTION OF THE FORECAST...EVEN AS WINDS EASE BELOW 20 KNOTS
FRIDAY MORNING. THE MAIN HIGH PRESSURE CENTER WILL HOLD STRONG OVER
THE LOWER MISSISSIPPI VALLEY FRIDAY...BUT HIGH PRESSURE OVER SOUTH
TEXAS WILL WEAKEN AND THE WINDS OVER THE GULF WILL VEER AND WEAKEN
FROM FRESH TO MODERATE BY SATURDAY. HIGH PRESSURE PUSHING OUT INTO
THE NORTHEAST GULF SUNDAY AND THE PERSISTENCE OF AN INVERTED
TROUGH OVER THE NORTHWEST GULF MAY HELP REINVIGORATED NORTHEAST
WINDS INCREASE BACK INTO THE FRESH CATEGORY SUNDAY...REQUIRING AN
EXERCISE CAUTION OR LOW END SMALL CRAFT ADVISORY MENTION ON THE
GULF...WITH SEAS AT FOUR TO SIX FEET SUNDAY BUT BUILDING TO SEVEN
FEET OR MORE SUNDAY NIGHT AND EARLY NEXT WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
BAYVIEW/PORT ISABEL  44  44  37  47 /  80  80  40  30
BROWNSVILLE          42  42  35  46 /  80  80  40  40
HARLINGEN            42  42  33  45 /  80  80  40  30
MCALLEN              40  40  33  46 /  70  70  30  20
RIO GRANDE CITY      41  41  36  47 /  60  60  10  10
SOUTH PADRE ISLAND   46  46  40  49 /  80  80  40  40

&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...WIND CHILL ADVISORY FROM 6 AM TO 6 PM CST THURSDAY FOR
     TXZ248>257.

     WIND ADVISORY FROM 5 AM TO 3 PM CST THURSDAY FOR TXZ251-254>257.

GM...GALE WARNING FROM MIDNIGHT TONIGHT TO 6 PM CST THURSDAY FOR
     GMZ130-132-135-150-155-170-175.

&&

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

59/54/58

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE BROWNSVILLE TX
740 AM CST WED MAR 4 2015

TXZ248>257-042200-
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
740 AM CST WED MAR 4 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF DEEP SOUTH
TEXAS.

.DAY ONE...TODAY AND TONIGHT

THERE IS A MODERATE RISK OF RIP CURRENTS AT AREA BEACHES. RIP
CURRENT RISK WILL INCREASE FROM NORTH TO SOUTH AFTER MIDNIGHT AS
WINDS AND SEAS INCREASE BEHIND A STRONG COLD FRONT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

AN ELEVATED RISK OF RIP CURRENTS IS LIKELY AT THE BEACHES OF SOUTH
PADRE ISLAND AND AT BOCA CHICA BEACH FROM THURSDAY THROUGH MONDAY.

A WIND ADVISORY IS POSSIBLE FOR PORTIONS OF DEEP SOUTH TEXAS AND
THE RIO GRANDE VALLEY ON THURSDAY.

A WIND CHILL ADVISORY IS POSSIBLE FOR PORTIONS OF DEEP SOUTH TEXAS
AND THE RIO GRANDE VALLEY THURSDAY THROUGH FRIDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

GMZ130-132-135-150-155-170-175-042200-
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-
740 AM CST WED MAR 4 2015

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

.DAY ONE...TODAY AND TONIGHT

A GALE WARNING IS IN EFFECT FOR THE LAGUNA MADRE AND THE LOWER TEXAS
GULF WATERS FROM 0 TO 60 NAUTICAL MILES OFFSHORE FROM LATE TONIGHT
THROUGH THURSDAY EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A GALE WARNING IS IN EFFECT FOR THE LAGUNA MADRE AND THE LOWER TEXAS
GULF WATERS FROM 0 TO 60 NAUTICAL MILES OFFSHORE THURSDAY AND
THURSDAY EVENING.

CONTINUED STRONG WINDS AND ROUGH SEAS ARE EXPECTED ALONG THE LOWER
TEXAS COAST THROUGH SUNDAY POSSIBLY REQUIRING ADDITIONAL SMALL CRAFT
ADVISORIES.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
141 PM CST WED MAR 4 2015

TXZ250-251-253>257-050100-
BROOKS-KENEDY-HIDALGO-INLAND WILLACY-INLAND CAMERON-
COASTAL WILLACY-COASTAL CAMERON-
INCLUDING THE CITIES OF...FALFURRIAS...SARITA...MCALLEN...
EDINBURG...PHARR...MISSION...WESLACO...RAYMONDVILLE...
BROWNSVILLE...HARLINGEN...PORT MANSFIELD...PORT ISABEL...
SOUTH PADRE ISLAND...LAGUNA HEIGHTS...LAGUNA VISTA
141 PM CST WED MAR 4 2015

...LIGHT FREEZING DRIZZLE POSSIBLE LATE THURSDAY NIGHT THROUGH
FRIDAY MORNING FOR THE LOWER VALLEY...

A STRONG COLD FRONT WILL ARRIVE THURSDAY MORNING...LOWERING
TEMPERATURES SIGNIFICANTLY. THURSDAY NIGHT TEMPERATURES FOR THE
LOWER VALLEY...INCLUDING THE COUNTIES OF CAMERON...WILLACY...
HIDALGO AND THE SOUTHERN PORTIONS OF KENEDY AND BROOKS
COUNTIES...WILL DECREASE TO JUST ABOVE FREEZING BY THE PREDAWN
HOURS OF FRIDAY. ANY LIGHT LIQUID PRECIPITATION WILL HAVE A CHANCE
TO EVAPORATE AS IT FALLS THROUGH DRIER AIR NEAR THE SURFACE...
ALLOWING IT TO POTENTIALLY COOL ENOUGH TO FREEZE BY THE TIME IT
REACHES THE GROUND.

PRECIPITATION ACCUMULATION IS EXPECTED TO BE LIGHT...BUT BECAUSE
THE POTENTIAL OCCURRENCE OF FREEZING PRECIPITATION IN DEEP SOUTH
TEXAS IS RELATIVELY RARE...PRECAUTIONARY MEASURES SHOULD BE TAKEN.
BE PREPARED TO DEAL WITH A LIGHT COAT OF ICE ON SURFACES LIKE YOUR
VEHICLE FIRST THING FRIDAY MORNING. ELEVATED SURFACES LIKE BRIDGES
AND OVERPASSES MAY BE SLIPPERY AND MOTORISTS SHOULD USE EXTREME
CARE DURING THE MORNING COMMUTE FRIDAY MORNING.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR FURTHER
UPDATES.

54