Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Brownsville, TX

August 3, 2017Hidalgo County, Texas

NWS Brownsville, TX issued this special weather statement at Aug 3, 2017, 2:42 PM CDT for Hidalgo County, Texas. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 3, 2017, 2:42 PM CDT (19:42 UTC)
Expired
Aug 3, 2017, 3:30 PM CDT
In force
48 min
Issued by
NWS Brownsville, TX

County Hidalgo County, TX

The radar

The Brownsville radar (KBRO), 92 km from the middle of the area, began a volume at 19:43 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.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 7.7 hours before the alert went out and 95 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-pSkew-T log-p diagram, Brownsville Intl, TX at 12:00Z on 2017-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1881 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brownsville Intl, TX at 12:00Z on 2017-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1881 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 3, 12:35 PM CDT, 2 hours 7 minutes earlier.

Area forecast discussion, Aug 3, 12:35 PM CDT, 2 hours 7 minutes before
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      <div class="status" id="status">Temporary Notice</div>
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Hazardous weather outlook, Aug 3, 2:01 PM CDT, 41 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Brownsville TX
201 PM CDT Thu Aug 3 2017

TXZ250-251-253>257-041130-
Brooks-Kenedy-Hidalgo-Inland Willacy-Inland Cameron-
Coastal Willacy-Coastal Cameron-
201 PM CDT Thu Aug 3 2017

This Hazardous Weather Outlook is for the Rio Grande Valley and
nearby ranchlands.

.DAY ONE...This Afternoon and Tonight

Scattered to numerous thunderstorms through late afternoon or
early evening will produce locally heavy rainfall capable of
causing minor street flooding in poor drainage urban locations as
well as frequent cloud to ground lightning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Isolated late morning and early afternoon thunderstorms may form
along the sea breeze Friday with the primary threat being
occasional cloud to ground lightning.

The heat index, or feels like temperature, will reach 105 to 110
each afternoon Saturday through Monday across the Lower and Mid
Rio Grande Valley.

A moderate threat for rip or longshore currents will develop
Saturday and continue through Monday or Tuesday at the beach.

.SPOTTER INFORMATION STATEMENT...

Spotters may wish to self activate to report any significant
flooding this afternoon.

TXZ248-249-252-041130-
Zapata-Jim Hogg-Starr-
201 PM CDT Thu Aug 3 2017

This Hazardous Weather Outlook is for the Rio Grande Plains.

.DAY ONE...This Afternoon and Tonight

A few late afternoon or early evening thunderstorms will produce
occasional cloud to ground lightning and brief downpours that may
cause very local flooding of poor drainage areas, mainly in Starr
and southern Zapata County.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

The heat index, or feels like temperature, will rise to 105 to 110
each afternoon Saturday through Monday along and near the Rio
Grande in southern Zapata and Starr County.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

GMZ130-132-135-150-155-170-175-041130-
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-
201 PM CDT Thu Aug 3 2017

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

.DAY ONE...This Afternoon and Tonight

Scattered to numerous thunderstorms will continue this afternoon
and evening. Primary hazards will be frequent cloud to water
lightning, torrential rains reducing visibility briefly to near
zero, and occasional wind gusts to 25 or 30 knots. Conditions
will be most frequent along and north of Port Mansfield.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Isolated thunderstorms will produce occasional cloud to water
lightning mainly during the morning and early afternoon hours on
Friday.

.SPOTTER INFORMATION STATEMENT...

Spotters may wish to self activate to report any significant
flooding this afternoon.

In the hours before

Special weather statement, Aug 3, 2:42 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Brownsville TX
242 PM CDT THU AUG 3 2017

TXZ252-253-032030-
Starr TX-Hidalgo TX-
242 PM CDT THU AUG 3 2017

...SPECIAL WEATHER STATEMENT...

At 239 PM CDT, Doppler radar was tracking quickly developing strong
thunderstorms near Palmview, Alton and just west of Mission moving
southeast at 20 mph.

Pea size hail and winds in excess of 30 mph will be possible with
this storm. Also, very intense rainfall is expected with rainfall
rates up to 3 inches per hour with amounts up to one to two inch in
a short period of time.

Locations impacted include...
Edinburg, Mission, Pharr, San Juan, Alamo, Donna, Hidalgo, Palmview,
Penitas and Sullivan City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2605 9807 2607 9813 2605 9815 2607 9818
      2606 9820 2612 9830 2610 9830 2617 9834
      2616 9839 2623 9845 2620 9848 2622 9856
      2626 9859 2624 9866 2637 9873 2637 9812
      2606 9799 2604 9807
TIME...MOT...LOC 1939Z 335DEG 39KT 2621 9837

GB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 3:30 PM CDTSpecial Weather StatementBROWillacy60 min
Aug 3, 3:35 PM CDTSpecial Weather StatementBROStarr40 min
Aug 3, 3:41 PM CDTSpecial Weather StatementBROJim Hogg64 min
Aug 3, 4:06 PM CDTAreal Flood AdvisoryBROJim Hogg84 min
Aug 3, 4:37 PM CDTAreal Flood AdvisoryBROStarr, Zapata83 min

Nearby

Special Weather Statements in Texas, 2017Every special weather statement in 2017

Sources

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