Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 42, NWS Brownsville, TX

April 20, 2012Hidalgo County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Apr 20, 2012, 5:08 PM CDT for Hidalgo County, Texas. It was in force for 52 min. 25 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2012, 5:08 PM CDT (22:08 UTC)
Expired: Apr 20, 2012, 6:00 PM CDT
In force: 52 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Hidalgo County, TX

The radar

The Brownsville radar (KBRO), 95 km from the middle of the area, began a volume at 22:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 20, 5:25 PM CDT	HAIL 2.75	Mission, TX	PUBLIC REPORTS BASEBALL SIZE HAIL IN MISSION NEAR PALM DRIVE AND 5 MILE WIND EST. TO 50 MPH
Apr 20, 5:26 PM CDT	HAIL 1.75	5 N Mission, TX	GOLF BALL SIZE HAIL REPORTED IN ALTON NEAR INTERSECTION OF 5 MILE ROAD AND CONWAY.
Apr 20, 5:26 PM CDT	HAIL 2.5	6 Nnw Mcallen, TX	BEGAN AT 526 PM CONTINUED THROUGH AT LEAST 536 PM.
Apr 20, 5:27 PM CDT	HAIL 1	Mcallen, TX	QUARTER SIZE HAIL REPORTED NEAR THE INTERSECTION OF TRENTON AND 10 STREET.
Apr 20, 5:27 PM CDT	HAIL 1.75	Mission, TX	GOLFBALL SIZED HAIL REPORTED IN MISSION NORTH OF 107.
Apr 20, 5:29 PM CDT	HAIL 1.75	5 Ne Palmview, TX	QUARTER SIZE TO GOLF BALL SIZE REPORTS IN PALMHURST AREA.
Apr 20, 5:30 PM CDT	TSTM WND GST 60	Mission, TX	REPORTS OF 60 MPH WIND GUSTS AND GOLF BALL SIZED HAIL AT STUART AND 21ST.
Apr 20, 5:30 PM CDT	HAIL 1.75	Mission, TX	REPORTS OF 60 MPH WIND GUSTS AND GOLF BALL SIZED HAIL AT STUART AND 21ST.
Apr 20, 5:31 PM CDT	HAIL 1	Mcallen, TX	SKYWARN SPOTTER REPORTS QUARTER SIZE HAIL IN NORTHEAST MCALLEN
Apr 20, 5:31 PM CDT	HAIL 1.75	Mcallen, TX	GOLFBALL SIZE HAIL REPORTED NEAR THE INTERSECTION OF BICENTENIAL AND NOLANA.
Apr 20, 5:32 PM CDT	HAIL 1.75	Mcallen, TX	GOLF BALL SIZED HAIL REPORTED AT 4 MILE AND WARE.
Apr 20, 5:34 PM CDT	HAIL 2.75	Mcallen, TX	PUBLIC REPORTED DIME TO BASEBALL SIZE HAIL AT NOLANA AND 23RD.
Apr 20, 5:36 PM CDT	HAIL 4.5	Mission, TX	SOFTBALL SIZED HAIL REPORTED AT TAYLOR AND 5 MILE ROAD.
Apr 20, 5:38 PM CDT	HAIL 1.75	Mission, TX	GOLF BALL SIZED HAIL REPORTED AT SHARY AND 3 MILE ROAD.
Apr 20, 5:39 PM CDT	HAIL 2.75	Mcallen, TX	SKYWARN SPOTTERS REPORT GOLF TO BASEBALL SIZE HAIL ON WARE RD AND QUARTER SIZE ON 23RD AND 5 MILE
Apr 20, 5:45 PM CDT	HAIL 1.75	Edinburg, TX	EDINBURG POLICE DEPARTMENT REPORTS GOLFBALL SIZE HAIL FELL IN EDINBURG BETWEEN 530 AND 6 PM CDT AT THE INTERSECTION OF CLOSNER AND CANTON.
Apr 20, 5:45 PM CDT	HAIL 2.75	Mcallen, TX	PUBLIC REPORTS OF BASEBALL SIZE HAIL ON 2500 JASMINE
Apr 20, 5:50 PM CDT	HAIL 1	Pharr, TX	PUBLIC REPORTS GOLF BALL SIZE HAIL IN SOUTH PHARR
Apr 20, 5:50 PM CDT	HAIL 4.5	Mcallen, TX	SOFTBALL SIZED HAIL REPORTED AT MCALLEN HIGH SCHOOL.
Apr 20, 5:56 PM CDT	HAIL 1	Palmview, TX
Apr 20, 5:59 PM CDT	HAIL 1	Mission, TX	QUARTER SIZED HAIL REPORTED ON W 40TH STREET.
Apr 20, 6:01 PM CDT	HAIL 2.5	Mission, TX	PUBLIC REPORTS LARGE HAIL IN ALTON JUST NORTH OF MISSION MILE 5 REPORTS NUMEROUS BROKEN CAR WINDSHIELDS
Apr 20, 6:05 PM CDT	HAIL 0.88	Mission, TX	NICKEL SIZE HAIL REPORTED AT THE HARRY SHIMOTSU ELEMENTARY SCHOOL.
Apr 20, 6:05 PM CDT	HAIL 1	Mission, TX	SKYWARN SPOTTER REPORTS QUARTER SIZE ON SHARY ROAD IN MISSION
Apr 20, 6:08 PM CDT	HAIL 1	Mcallen, TX	QUARTER SIZED HAIL REPORTED AT CONWAY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 21 storm reports to this severe thunderstorm warning; the first came 17 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 20, 2:29 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 10.1 hours before the alert went out and 97 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1336 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 742 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

557 
WUUS54 KBRO 202208
SVRBRO
TXC215-202300-
/O.NEW.KBRO.SV.W.0042.120420T2208Z-120420T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
508 PM CDT FRI APR 20 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HIDALGO COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 600 PM CDT

* AT 508 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND
  DAMAGING 60 MPH WINDS...12 MILES NORTHWEST OF MISSION...MOVING
  SOUTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CITRUS CITY.
  ALTON.
  MISSION.
  MCALLEN.
  SAN JUAN.
  ALAMO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&

LAT...LON 2615 9834 2616 9834 2615 9835 2617 9839
      2630 9851 2647 9839 2624 9799 2608 9813
TIME...MOT...LOC 2208Z 306DEG 37KT 2634 9836

$$

JGG

6 follow-up statements

483 
WWUS54 KBRO 202214
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
514 PM CDT FRI APR 20 2012

TXC215-202300-
/O.CON.KBRO.SV.W.0042.000000T0000Z-120420T2300Z/
HIDALGO-
514 PM CDT FRI APR 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHERN HIDALGO COUNTY...

AT 514 PM CDT NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM 8 MILES NORTH OF MISSION...MOVING 
SOUTHEAST AT 45 MPH. THIS STORM IS BECOMING CAPABLE OF GOLFBALL 
SIZED HAIL AND DAMAGING WINDS TO 60 OR 70 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ALTON.
  MISSION.
  MCALLEN.
  SAN JUAN.
  ALAMO.
  DONNA.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  GOLFBALL SIZE HAIL...WITH POSSIBLE DAMAGE.
  DAMAGING WIND GUSTS OF 60 TO 70 MILES AN HOUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHILE NOT IMMINENT...TORNADOES CAN AND OCCASIONALLY DO PRODUCE 
TORNADOES WITH LITTLE OR NO ADVANCED WARNING.

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2615 9834 2616 9834 2615 9835 2617 9839
      2630 9851 2647 9839 2624 9799 2608 9813
TIME...MOT...LOC 2214Z 306DEG 37KT 2630 9831

$$

JGG

549 
WWUS54 KBRO 202224
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
524 PM CDT FRI APR 20 2012

TXC215-202300-
/O.CON.KBRO.SV.W.0042.000000T0000Z-120420T2300Z/
HIDALGO-
524 PM CDT FRI APR 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHERN HIDALGO COUNTY...

AT 523 PM CDT...A WEATHER SPOTTER REPORTED BASEBALL SIZED HAIL IN 
MISSION. THIS STORM IS ALSO CAPABLE OF DESTRUCTIVE WINDS TO 70 MPH.

THIS IS AN EXTREMELY DANGEROUS SITUATION! TAKE COVER NOW!

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE
THUNDERSTORM WAS NOW 4 MILES NORTHWEST OF MCALLEN...MOVING SOUTHEAST
AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MCALLEN.
  SAN JUAN.
  ALAMO.
  DONNA.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  GOLFBALL SIZE HAIL...WITH POSSIBLE DAMAGE.
  DAMAGING WIND GUSTS OF 60 TO 70 MILES AN HOUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2615 9834 2616 9834 2615 9835 2617 9839
      2630 9851 2647 9839 2624 9799 2608 9813
TIME...MOT...LOC 2223Z 304DEG 39KT 2625 9823

$$

018 
WWUS54 KBRO 202228
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
528 PM CDT FRI APR 20 2012

TXC215-202300-
/O.CON.KBRO.SV.W.0042.000000T0000Z-120420T2300Z/
HIDALGO-
528 PM CDT FRI APR 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHERN HIDALGO COUNTY...

AT 527 PM CDT...NUMEROUS REPORTS OF GOLFBALL TO BASEBALL SIZED HAIL 
WERE BEING RECEIVED IN THE MISSION AND MCALLEN AREA. RADAR ALSO 
INDICATES WINDS OF UP TO 70 MPH WILL BE POSSIBLE WITH THIS STORM.

THIS IS AN EXTREMELY DANGEROUS SITUATION. TAKE COVER IN AN INTERIOR 
ROOM AWAY FROM WINDOWS!

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE
THUNDERSTORM WAS NOW OVER MCALLEN...MOVING SOUTHEAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MCALLEN.
  SAN JUAN.
  SOUTH ALAMO.
  DONNA.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2615 9834 2616 9834 2615 9835 2617 9839
      2630 9851 2647 9839 2624 9799 2608 9813
TIME...MOT...LOC 2227Z 304DEG 39KT 2622 9820

$$

JGG

355 
WWUS54 KBRO 202236
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
536 PM CDT FRI APR 20 2012

TXC215-202300-
/O.CON.KBRO.SV.W.0042.000000T0000Z-120420T2300Z/
HIDALGO-
536 PM CDT FRI APR 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHERN HIDALGO COUNTY...

AT 536 PM CDT...WEATHER SPOTTERS REPORTED HAIL BETWEEN BASEBALL 
SIZED AND SOFTBALL SIZED NEAR MISSION. THIS IS A LIFE THREATENING 
SITUATION...TAKE COVER INDOORS IMMEDIATELY! THIS STORM WILL ALSO 
PRODUCE DAMAGING WINDS TO 70 MPH.

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE
THUNDERSTORM WAS NOW OVER PHARR...MOVING SOUTHEAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SAN JUAN.
  SOUTH ALAMO.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  DESTRUCTIVE BASEBALL SIZE HAIL.
  DESTRUCTIVE HURRICANE FORCE WIND GUSTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2615 9834 2616 9834 2615 9835 2617 9839
      2630 9851 2647 9839 2624 9799 2608 9813
TIME...MOT...LOC 2236Z 309DEG 41KT 2617 9815

$$

JGG

173 
WWUS54 KBRO 202250
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
550 PM CDT FRI APR 20 2012

TXC215-202300-
/O.CON.KBRO.SV.W.0042.000000T0000Z-120420T2300Z/
HIDALGO-
550 PM CDT FRI APR 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHERN HIDALGO COUNTY...

TWO DESTRUCTIVE SEVERE THUNDERSTORMS EXIST IN HIDALGO COUNTY. AT 549 
PM A SEVERE STORM WAS LOCATED 6 MILES NORTHWEST OF MISSION...MOVING 
SOUTHEAST AT 50 MPH. A SECOND STORM WAS BETWEEN HIDALGO AND MCALLEN. 
THESE STORMS ARE MOVING EAST TO SOUTHEAST AT 40 MPH. NUMEROUS 
REPORTS OF EXTREMELY LARGE HAIL HAVE BEEN RECEIVED WITH THESE 
STORMS. TAKE COVER IN AN INTERIOR ROOM AWAY FROM WINDOWS! ADDITIONAL 
LARGE HAIL IS POSSIBLE IN THE MCALLEN AREA FROM THE SECOND SEVERE 
STORM. TAKE COVER!

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PALMVIEW.
  MISSION.
  MCALLEN MILLER AIRPORT.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2615 9834 2616 9834 2615 9835 2617 9839
      2630 9851 2647 9839 2624 9799 2608 9813
TIME...MOT...LOC 2249Z 309DEG 42KT 2625 9838

$$

JGG

418 
WWUS54 KBRO 202257
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
557 PM CDT FRI APR 20 2012

TXC215-202307-
/O.EXP.KBRO.SV.W.0042.000000T0000Z-120420T2300Z/
HIDALGO-
557 PM CDT FRI APR 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN HIDALGO COUNTY WILL
EXPIRE AT 600 PM CDT...

THIS WARNING HAS BEEN REPLACED BY A NEW WARNING UNTIL 645 PM.


LAT...LON 2615 9834 2616 9834 2615 9835 2617 9839
      2630 9851 2647 9839 2624 9799 2608 9813
TIME...MOT...LOC 2257Z 309DEG 42KT 2619 9830

$$

JGG

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 2:48 PM CDT, 2 hours 20 minutes earlier.

Area forecast discussion, Apr 20, 2:48 PM CDT, 2 hours 20 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BROWNSVILLE TX
248 PM CDT FRI APR 20 2012

.DISCUSSION...AFTER COORDINATION WITH SPC AND WFO CRP...A SEVERE
THUNDERSTORM WATCH HAS BEEN ISSUED FOR ALL OF THE CWA THROUGH 10
PM TONIGHT AS STRONG TO SEVERE THUNDERSTORMS WILL DEVELOP ALONG
AND AHEAD OF A COLD FRONT MOVING INTO THE AREA LATER THIS
AFTERNOON INTO THIS EVENING. THE FORECAST HAS BEEN UPDATED TO
REFLECT THE WATCH AND THE POTENTIAL FOR SEVERE WEATHER THIS
AFTERNOON INTO THIS EVENING.
&&

.PREV DISCUSSION... /ISSUED 153 PM CDT FRI APR 20 2012/
SHORT TERM.../TONIGHT THROUGH SATURDAY NIGHT/...STILL AWAITING
THE ARRIVAL OF THE FRONTAL BOUNDARY AND IMPENDING THUNDERSTORM
OUTBREAK ALONG THE FRONT. SPECIAL 18Z SOUNDING LAUNCHED FOR UPDATE
ON VERTICAL PROFILE. INITIAL DATA SHOWS CAPPING STILL HOLDING
FIRM...BUT WILL BE FURTHER ERODED BY COOLER AIR MOVING IN WITH
COLD FRONT. THUNDERSTORM ACTIVITY WILL BE CONFINED TO AREAS
GENERALLY ALONG THE COLD FRONT. LATEST MODEL RUNS BRINGING LESS OF
A WIND THREAT BEHIND THE FRONT OVERNIGHT INTO TOMORROW...WITH
GUSTIER WINDS EXPECTED FURTHER OFFSHORE. SKIES WILL QUICKLY CLEAR
AS DRIER AIR MOVES IN FROM THE NORTHWEST...AND REMAIN CLEAR
THROUGH SATURDAY NIGHT. HIGHS TOMORROW WILL RUN ABOUT 5 TO 10
DEGREES COOLER...AND WITH THE DRIER AIR...WILL MAKE THINGS PRETTY
COMFORTABLE.

LONG TERM.../SUNDAY THROUGH FRIDAY/...
BENIGN WEATHER CONTINUES THROUGH THE LONG TERM PERIOD. A BROAD AREA
OF HIGH PRESSURE OVER THE CALIFORNIA COAST MIGRATES EASTWARD THIS
WEEKEND. LIGHT NORTHWEST FLOW ALOFT WITH A SURFACE HIGH WILL KEEP
MOST OF SOUTH TEXAS UNDER HIGH WARM TEMPERATURES. LOW TEMPERATURES
WILL BE IN THE MID 60S AND MUCH COOLER IN THE FAR NORTH. A DRY AIR
MASS WITH THIS RIDGE WILL KEEP WESTERN TEXAS UNDER RH VALUES IN THE
20S ESPECIALLY ACROSS ZAPATA AND RIO GRANDE CITY AND CONTINUE INTO
THE BEGINNING OF THE UPCOMING WEEK. RH VALUES INCREASE BACK TO THE
30 TO 50 PERCENT RANGE BY WEDNESDAY. DO NO EXPECT CRITICAL FIRE
WEATHER CONDITIONS AT THIS TIME AS WINDS ALOFT ARE NOT STRONG ENOUGH
AND DO NOT LINE UP WITH AREAS OF VERY LOW HUMIDITY FOR SUNDAY
AFTERNOON.

THROUGH THE WEEK...DID NOT MAKE MUCH CHANGE TO THE FORECAST. HIGH
TEMPERATURES REMAIN VERY WARM WITH HIGHS IN THE 90S. RIDGE STARTS TO
BREAK DOWN AS IT MOVES ACROSS THE CENTRAL PLAINS BY MID WEEK.
GFS/CMC SEEM TO AGREED ON ONE UPPER LOW TO MOVE SOUTH OVER THE CA
COAST WITH A SECOND FORMING OVER THE NORTHWEST PACIFIC COAST WITH
THE ECMWF HINTING ON TWO SEPARATE LOW AS WELL BUT NOT AS DEFINED.
GFS IS A LOT FASTER WITH THE CA LOW MOVING INLAND BY WEDNESDAY
ACROSS THE DESERT SOUTHWEST COMPARED TO THE CMC WHICH JUST KEEPS THIS
CLOSED LOW STATIONARY. UPPER LEVEL LOW OVER THE PACIFIC NORTHWEST
WILL MOVE  PUSH INLAND BY THE END OF THE WEEK. THERE IS NOT MUCH
IMPACT ON THE LOWER VALLEY. ANOTHER CHANCE OF PRECIPITATION LOOK TO
BE LATER THE FOLLOWING WEEKEND.

MARINE.../TONIGHT THROUGH SATURDAY NIGHT/...THE COLD FRONT IS PROGGED
TO RACE THROUGH THE COASTAL WATERS OVERNIGHT...BRINGING A ROUND OF
THUNDERSTORMS. WINDS ALONG THE FRONT WILL SHIFT TO THE NORTH AND
INCREASE TO 20 TO 25 KNOTS OVERNIGHT AND THROUGH TOMORROW. SEAS WILL
INCREASE TO 5 TO 8 FEET ON SATURDAY AS BREEZY CONDITIONS CONTINUE.
CONDITIONS WILL IMPROVE ON SUNDAY AS HIGH PRESSURE SETTLES ACROSS
THE NORTHWEST GULF.

SUNDAY THROUGH THURSDAY...
AN UPPER RIDGE MOVES EAST KEEPING MOST OF THE RIO GRANDE VALLEY
UNDER A NORTHWEST FLOW ALOFT. WINDS WILL GRADUALLY DECREASE SUNDAY
AFTERNOON WHICH WILL ALLOW FOR SEAS TO LOWER QUICKLY. NEXT WEEK
MARINE CONDITIONS WILL REMAIN BETWEEN 2 TO 4 FEET ACROSS THE MARINE
ZONES. NEXT SYSTEM WILL APPROACH THE AREA INTO THE FOLLOWING WEEKEND
WHICH WILL LIKELY INTERACT WITH A SURFACE HIGH OVER THE GULF WATERS.
THIS WILL DETERIORATE MARINE CONDITIONS INTO THE FOLLOWING WEEKEND.
&&

.PRELIMINARY POINT TEMPS/POPS...
BAYVIEW/PORT ISABEL  64  79  62  82 /  30   0   0   0
BROWNSVILLE          65  81  61  85 /  30   0   0   0
HARLINGEN            63  83  59  85 /  30   0   0   0
MCALLEN              64  85  58  90 /  30   0   0   0
RIO GRANDE CITY      65  87  60  91 /  30   0   0   0
SOUTH PADRE ISLAND   66  77  67  78 /  30   0   0   0
&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT ADVISORY FOR WINDS FROM 7 PM THIS EVENING TO 7 AM
     CDT SATURDAY FOR GMZ130-132-135.

     SMALL CRAFT ADVISORY FROM 7 PM THIS EVENING TO 7 PM CDT SATURDAY
     FOR GMZ150-155-170-175.
&&

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

61/68/60/58/VEGA/MARTINEZ

Hazardous weather outlook, Apr 20, 2:40 PM CDT, 2 hours 28 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE BROWNSVILLE TX
240 PM CDT FRI APR 20 2012

TXZ248>257-211945-
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
240 PM CDT FRI APR 20 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF DEEP SOUTH
TEXAS THROUGH 1000 PM TONIGHT.

SCATTERED SEVERE THUNDERSTORMS ARE EXPECTED ACROSS DEEP SOUTH
TEXAS AND THE RIO GRANDE VALLEY. THUNDERSTORMS WILL BE
SEVERE...PRODUCING LARGE HAIL AND DAMAGING STRONG
WINDS...ESPECIALLY THIS AFTERNOON AND EARLY TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

AN ELEVATED RISK OF RIP CURRENTS IS LIKELY AT THE BEACHES OF SOUTH
PADRE ISLAND AND AT BOCA CHICA BEACH SATURDAY AND SUNDAY...AND
AGAIN ON THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION IS NEEDED THIS AFTERNOON THROUGH
TONIGHT.

GMZ130-132-135-150-155-170-175-211945-
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-
240 PM CDT FRI APR 20 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE LAGUNA MADRE AND
NEAR SHORE WATERS OF THE LOWER TEXAS COAST THROUGH 1000 PM TONIGHT.

A SMALL CRAFT ADVISORY FOR WINDS WILL BE IN EFFECT FOR THE LAGUNA
MADRE BEGINNING AT 7 PM CDT THIS EVENING. A SMALL CRAFT ADVISORY
WILL BE IN EFFECT FOR THE GULF OF MEXICO WATERS EAST OF PADRE
ISLAND FROM 0 TO 60 NAUTICAL MILES OFFSHORE ALSO BEGINNING AT 7 PM
CDT THIS EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THE SMALL CRAFT ADVISORY FOR WINDS WILL REMAIN IN EFFECT FOR THE
LAGUNA MADRE UNTIL 7 AM CDT SATURDAY...WHILE THE SMALL CRAFT
ADVISORY FOR THE GULF OF MEXICO WATERS EAST OF PADRE ISLAND WILL
REMAIN IN EFFECT UNTIL 7 PM CDT SATURDAY. ADDITIONAL SMALL CRAFT
ADVISORIES MAY BE NEEDED ALONG THE LOWER TEXAS COAST LATE SATURDAY
NIGHT...AND AGAIN TUESDAY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION IS NEEDED THIS AFTERNOON THROUGH
TONIGHT.

CASTILLO

In the hours before

Special weather statement, Apr 20, 3:02 PM CDT, 2 hours 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
302 PM CDT FRI APR 20 2012

TXZ249-250-202100-
JIM HOGG-BROOKS-
302 PM CDT FRI APR 20 2012

...SIGNIFICANT WEATHER ADVISORY FOR BROOKS AND JIM HOGG COUNTY....

AT 301 PM...RADAR INDICATED DEVELOPING THUNDERSTORMS FROM JUST SOUTH
OF HEBBRONVILLE....TO NEAR RANDADO...MOVING EAST TO SOUTHEAST AT 40
MPH. THESE STORMS ARE CAPABLE OF ONE HALF INCH HAIL AND GUSTY WINDS
TO AROUND 40 MPH.  THESE STORMS ARE ALSO INTENSIFYING AND SEVERE
WEATHER MAY DEVELOP SHORTLY.

MONITOR NOAA WEATHER RADIO...WEATHER.GOV/RGV....AND LOCAL MEDIA FOR
LATER STATEMENTS AND POSSIBLE WARNINGS.

JGG

Special weather statement, Apr 20, 3:42 PM CDT, 1 hour 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
342 PM CDT FRI APR 20 2012

TXZ250-202130-
BROOKS-
342 PM CDT FRI APR 20 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BROOKS COUNTY...

AT 340 PM...RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 25 MILES
NORTHWEST OF FALFURRIAS...MOVING SOUTHEAST AT 35 MPH. IF THIS STORM
MAINTAINS CURRENT SPEED IT WILL MOVE INTO FALFURRIAS BETWEEN AROUND
400 AND 415 PM. LARGE HAIL AND DAMAGING WINDS MAY BE POSSIBLE WITH
THIS STORM...AND HAIL OF AT LEAST ONE HALF INCH IN DIAMETER AND
GUSTY 50 MPH WINDS ARE LIKELY.

MONITOR NOAA WEATHER RADIO...WEATHER.GOV/RGV...AND LOCAL MEDIA FOR
LATER STATEMENTS AND POSSIBLE WARNINGS.

JGG/EB

Special weather statement, Apr 20, 3:49 PM CDT, 1 hour 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
349 PM CDT FRI APR 20 2012

TXZ249-202130-
JIM HOGG-
349 PM CDT FRI APR 20 2012

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL JIM HOGG COUNTY...

AT 349 PM...RADAR INDICATED A DEVELOPING THUNDERSTORM ABOUT 5 MILES
NORTHWEST OF AGUA NUEVA...MOVING EAST AT 35 MPH. HAIL TO NICKEL SIZE
AND GUSTY WINDS TO 40 MPH IS POSSIBLE WITH THIS STORM AS IT CROSSES
HIGHWAY 70.

THIS STORM IS ALSO INTENSIFYING AND SEVERE WEATHER MAY DEVELOP.
MONITOR NOAA WEATHER RADIO...WEATHER.GOV/RGV...AND LOCAL MEDIA FOR
LATER STATEMENTS AND POSSIBLE WARNINGS.

JGG/EB

Special weather statement, Apr 20, 4:01 PM CDT, 1 hour 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
401 PM CDT FRI APR 20 2012

TXZ250-202145-
BROOKS-
401 PM CDT FRI APR 20 2012

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL AND NORTHERN BROOKS
COUNTY...

AT 400 PM...RADAR INDICATED A LARGE CLUSTER OF STRONG THUNDERSTORMS
OVER NORTHWESTERN BROOKS COUNTY. THESE STORMS WILL CONTINUE TO MOVE
EAST AT AROUND 35 MPH AND PRODUCE NICKEL SIZED HAIL...AND GUSTY
WINDS TO 50 MPH.  ANOTHER STRONG STORM IS LOCATED SOUTHWEST OF
ENCINO...AND MOVING SOUTHEAST AT 35 MPH.

VERY HEAVY RAINFALL WILL ALSO BE POSSIBLE WITH THESE STORMS. SEVERE
WEATHER MAY DEVELOP. MONITOR NOAA WEATHER
RADIO...WEATHER.GOV/RGV...AND LOCAL MEDIA FOR UPDATES.

JGG

Special weather statement, Apr 20, 4:29 PM CDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
429 PM CDT FRI APR 20 2012

TXZ250-251-202215-
BROOKS-KENEDY-
429 PM CDT FRI APR 20 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN BROOKS AND JIM HOGG
COUNTIES...

AT 429 PM...RADAR INDICATED LARGE CLUSTERS OF STRONG THUNDERSTORMS
FROM ABOUT 10 MILES SOUTHWEST OF FALFURRIAS...TO ABOUT 10 MILES
SOUTH OF SARITA...MOVING EAST AT 35 MPH. NICKEL SIZED HAIL...AND
GUSTY WINDS TO 50 MPH WILL BE POSSIBLE WITH THESE STORMS.

SEVERE WEATHER MAY DEVELOP WITH THESE STORMS...MONITOR FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.

JGG

Local storm report, Apr 20, 4:38 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
438 PM CDT FRI APR 20 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0436 PM     HAIL             5 E LA GLORIA           26.72N  98.46W
04/20/2012  E1.00 INCH       STARR              TX   CO-OP OBSERVER

            NWS CO-OP OBSERVER REPORTS QUARTER SIZE HAIL AND WIND
            GUST TO 50 TO 60 MPH NEAR SAN ISIDRO

&&

EVENT NUMBER BRO1200040

AV

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 3:54 AM CDT	Small Craft Advisory	BRO		42 hr
Apr 20, 3:54 AM CDT	Small Craft Advisory for Winds	BRO		30 hr
Apr 20, 3:09 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Jim Hogg	51 min
Apr 20, 3:57 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Jim Hogg, Starr	48 min
Apr 20, 4:12 PM CDT	Tornado Warning	BRO	Jim Hogg	10 min
Apr 20, 4:14 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	46 min
Apr 20, 4:18 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	42 min
Apr 20, 4:36 PM CDT	Areal Flood Advisory	BRO	Brooks	114 min
Apr 20, 4:37 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	38 min
Apr 20, 4:38 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	52 min
Apr 20, 4:58 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	47 min
Apr 20, 5:04 PM CDT	Special Marine Warning	BRO		2 hr
Apr 20, 5:16 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy, Willacy	27 min
Apr 20, 5:17 PM CDT	Areal Flood Advisory	BRO	Hidalgo, Starr	118 min
Apr 20, 5:20 PM CDT	Areal Flood Advisory	BRO	Kenedy	115 min
Apr 20, 5:27 PM CDT	Tornado Warning	BRO	Willacy	14 min
Apr 20, 5:30 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	45 min
Apr 20, 5:40 PM CDT	Severe Thunderstorm Warning	BRO	Willacy	50 min
Apr 20, 5:53 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo	52 min
Apr 20, 5:56 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	24 min
Apr 20, 6:11 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Willacy	29 min
Apr 20, 6:18 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	42 min
Apr 20, 6:30 PM CDT	Areal Flood Advisory	BRO	Cameron, Willacy	2 hr
Apr 20, 6:30 PM CDT	Tornado Warning	BRO	Cameron	30 min
Apr 20, 6:56 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	49 min
Apr 20, 6:57 PM CDT	Tornado Warning	BRO	Cameron	12 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.