Severe Thunderstorm Warning 53, NWS Brownsville, TX

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
615 PM CDT Mon May 29 2023

...New AVIATION...

.SHORT TERM...
(Tonight through Tuesday night)
Issued at 238 PM CDT Mon May 29 2023

Ongoing seabreeze convection in mainly Kenedy and Willacy counties
is expected to increase in both coverage and intensity during the
remainder of the afternoon and into the evening hours.  CAPEs as
high as 2500 J/kg along with no cap, a seabreeze boundary, and an
approaching mid/upper closed low/vort max in Central TX will produce
scattered convection through this evening across the remainder of
the RGV and Northern Ranchlands. Effective shear values of 30-35 kt
will be enough to possibly produce a few organized strong to
possibly severe storms with damaging winds as the main severe
threat.  Could be some small hail, too.  This scenario is in line
with the latest Day 1 SPC Convective Outlook of Marginal for our
entire CWA this afternoon/evening. Various CAM guidance runs have
also been very consistent with this anticipated convective scenario
this afternoon and evening.  The convection later this evening will
likely have a southward propagation as the closed low/vort max
continues diving southeastward.  Could be strong winds associated
with these southward-moving clusters.

Most of the area remains in a Slight Risk of Excessive Rainfall for
tonight.  PWATs will be close to 1.8-2.0 inches this evening which
is around the 90th percentile. The past few HREF and NBM solutions
still depict 2-4 inches possible with the slower-moving storms (mean
wind from the 12Z BRO sounding this morning was 10 kt or less). Most
of the convection will have either dissipated or pushed south into
Mexico by midnight tonight. Will adjust POPs accordingly, beginning
with chance POPs at the outset and then diminish to 10-20% by
midnight.

Convection may re-fire on Tue morning across the coastal areas given
the close proximity to the mid-level vort max diving southeastward
across the eastern CWA and adjacent waters and also due to lingering
PWATs close to 1.6-1.7 inches.  Isolated to scattered convection
will be mainly confined to areas east of I-69C on Tue given the
lingering moisture and instability profiles interacting with no cap
and a seabreeze.  Convection should dissipate very quickly by early
Tue evening as stronger subsidence begins to move eastward into the
CWA due to the building mid/upper ridge axis aloft.

Afternoon highs on Tue should be slightly warmer than today given
less cloud cover and lower rain chances.  Did adjust the highs
upward slightly from the latest NBM guidance. For overnight lows,
temps should be a bit lower than the past few days given less cloud
cover and a drying trend.

&&

.LONG TERM...
(Wednesday through next Monday)
Issued at 238 PM CDT Mon May 29 2023

Mid level riding will build overhead Deep South Texas mid to late
week, and as such, rain chances will be less than 10% and
temperatures will gradually increase through the rest of the week.
However, there may be just enough moisture and diurnal heating each
afternoon to support a shower or two, but most areas are expected to
stay dry through Friday.

The mid level ridge will flatten over Deep South Texas into the
weekend as a shortwave trough moves through the Desert Southwest and
into Central Texas, which will help to increase rain chances
Saturday through Sunday. Then rain chances will stick around through
Monday before the mid level ridge tries to build overhead again by
mid week next week.

As for temperatures, highs will generally be in the lower to mid 90s
and lows in the lower to mid 70s. Along the coast, temperatures will
generally remain in the 80s.

&&

.AVIATION...
(00Z TAFS)
Issued at 612 PM CDT Mon May 29 2023

VFR conditions are generally expected through much of the TAF
period. With that said, showers and thunderstorms in the area this
evening could affect all major aerodromes dropping visibility and
leading to potential brief IFR conditons. This activity should
mainly occur before midnight.

&&

.MARINE...
Issued at 238 PM CDT Mon May 29 2023

Tonight through Tuesday night...The overall gradient will remain
generally weak through Tue night. The thermal gradient in the
afternoon and evening will enhance the winds by at least 5 knots.
Otherwise, seas will remain fairly flat at around 2 feet.

Wednesday through Monday...Overall, marine conditions will stay
fairly benign through the period. Wave heights will remain 1 to 3
feet through the weekend and subside to 1 to 2 feet early next week
with gentle to moderate east-southeast breezes. The chance for some
showers and thunderstorms returns Saturday through Monday.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             90  72  88  73 /  50  40  30   0
HARLINGEN               88  69  89  70 /  60  40  30   0
MCALLEN                 88  71  91  72 /  60  50  20   0
RIO GRANDE CITY         90  70  92  70 /  50  30  10   0
SOUTH PADRE ISLAND      86  74  84  76 /  40  30  30   0
BAYVIEW/PORT ISABEL     85  71  86  72 /  50  30  30   0

&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.
&&

SHORT TERM...80
LONG TERM....69
AVIATION...68

Hazardous Weather Outlook
National Weather Service Brownsville TX
427 PM CDT Mon May 29 2023

TXZ248>255-351-353>355-451-454-455-302130-
Zapata-Jim Hogg-Brooks-Inland Kenedy-Starr-Southern Hidalgo-
Inland Willacy-Inland Cameron-Coastal Kenedy-Northern Hidalgo-
Coastal Willacy-Coastal Cameron-Kenedy Island-Willacy Island-
Cameron Island-
427 PM CDT Mon May 29 2023

This Hazardous Weather Outlook is for portions of Deep South
Texas.

.DAY ONE...Tonight

Thunderstorms occurring this evening/tonight may be strong to
severe with damaging winds possible. Nuisance flooding and pockets
of flash flooding will also be possible within any of the heavier
showers and storms.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

An elevated risk of rip currents is possible at the beaches of
South Padre Island and at Boca Chica Beach Thursday and Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

GMZ130-132-135-150-155-170-175-302130-
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-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
Gulf waters from Port Mansfield to the Rio Grande extending from
20 to 60 nm-
Gulf waters from Baffin Bay to Port Mansfield extending from
20 to 60 nm-
427 PM CDT Mon May 29 2023

This Hazardous Weather Outlook is for portions of The Gulf of
Mexico and The Laguna Madre.

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

Special Weather Statement
National Weather Service Brownsville TX
556 PM CDT Mon May 29 2023

TXZ253-255-292330-
Southern Hidalgo TX-Inland Cameron TX-
556 PM CDT Mon May 29 2023

...A strong thunderstorm will impact portions of east central
Hidalgo, northwestern Cameron and southwestern Willacy Counties
through 630 PM CDT...

At 555 PM CDT, Doppler radar was tracking a strong thunderstorm over
Indian Hills, or near La Villa, moving northeast at 5 to 10 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Harlingen, Edcouch, Santa Rosa, La Villa, Olivarez, Mila Doce,
Yznaga, Tierra Bonita, Satiago Garcia Elementary School and Edcouch
Volunteer Fire Department.

This includes Interstate Highway 69 E between mile markers 32 and 37.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 2624 9800 2643 9790 2643 9789 2641 9786
      2635 9786 2633 9774 2630 9769 2615 9788
TIME...MOT...LOC 2255Z 226DEG 6KT 2623 9791

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Mejia

Special Weather Statement
National Weather Service Brownsville TX
657 PM CDT Mon May 29 2023

TXZ250-300030-
Brooks TX-
657 PM CDT Mon May 29 2023

...A strong thunderstorm will impact portions of northeastern Brooks
County through 730 PM CDT...

At 657 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Falfurrias Junior High School, or 7 miles
southwest of Falfurrias, moving south at 10 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Hidalgo City Park.

This includes US Highway 281 between mile markers 714 and 726.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 2721 9837 2726 9821 2702 9802 2695 9831
TIME...MOT...LOC 2357Z 337DEG 11KT 2717 9825

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Mejia

Special Weather Statement
National Weather Service Brownsville TX
710 PM CDT Mon May 29 2023

TXZ253-300045-
Southern Hidalgo TX-
710 PM CDT Mon May 29 2023

...A strong thunderstorm will impact portions of south central
Hidalgo County through 745 PM CDT...

At 709 PM CDT, Doppler radar was tracking a strong thunderstorm over
Palmhurst. This storm was nearly stationary.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Palmhurst, North McAllen, Alton, Mcallen Municipal Park, Crockett
Elementary School, Edinburg Regional Medical Center, Mcallen High
School, Hackberry Park, Pharr Memorial Library and Lee Elementary
School.

This includes Interstate Highway 69 C between mile markers 1 and 2.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 2625 9836 2631 9835 2630 9817 2619 9818
TIME...MOT...LOC 0009Z 272DEG 2KT 2626 9829

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Mejia

Special Weather Statement
National Weather Service Brownsville TX
711 PM CDT Mon May 29 2023

TXZ253-300045-
Southern Hidalgo TX-
711 PM CDT Mon May 29 2023

...A strong thunderstorm will impact portions of east central Hidalgo
County through 745 PM CDT...

At 711 PM CDT, Doppler radar was tracking a strong thunderstorm over
San Carlos Elementary School, or near Edinburg. This storm was nearly
stationary.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Elsa, Memorial Middle School, San Carlos Elementary School, Cesar
Chavez, Fountain Center Park, Maria Alicia P Munoz Elementary School,
Los Lagos Golf Course, Muniz, Economedes High School and Eisenhower
Elementary School.

This includes Interstate Highway 69 C between mile markers 6 and 9.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 2627 9815 2634 9815 2631 9799 2621 9800
TIME...MOT...LOC 0011Z 290DEG 3KT 2628 9809

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Mejia

Special Weather Statement
National Weather Service Brownsville TX
715 PM CDT Mon May 29 2023

TXZ249-300045-
Jim Hogg TX-
715 PM CDT Mon May 29 2023

...A strong thunderstorm will impact portions of southeastern Jim
Hogg County through 745 PM CDT...

At 715 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Agua Nueva, moving southeast at 10 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Agua Nueva.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 2697 9842 2696 9842 2686 9867 2708 9873
      2714 9857
TIME...MOT...LOC 0015Z 332DEG 8KT 2704 9862

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Mejia

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