Alert archive / Texas / Winter Weather Advisories in 2021

Winter Weather Advisory 1, NWS Brownsville, TX

February 13, 2021Brooks County, Jim Hogg County, Zapata County, Texas

NWS Brownsville, TX issued this winter weather advisory at Feb 13, 2021, 3:18 PM CST for Brooks County, Jim Hogg County, Zapata County, Texas. It took effect at Feb 13, 2021, 9:00 PM CST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Feb 13, 2021, 3:18 PM CST (21:18 UTC)
In effect from
Feb 13, 2021, 9:00 PM CST
Expired
Feb 14, 2021, 11:00 AM CST
In force
14 hr
Issued by
NWS Brownsville, TX

Counties Brooks County, TX, Jim Hogg County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 144 km from the middle of the area, began a volume at 21:21 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

Corpus Christi, TX (KCRP), launched 12:00Z, 9.3 hours before the alert went out and 155 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, Corpus Christi, TX at 12:00Z on 2021-02-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 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, Corpus Christi, TX at 12:00Z on 2021-02-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.19395878Sfc1 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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
464 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
284 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter weather advisory 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 winter weather advisory went out at Feb 13, 11:25 AM CST, 3 hours 53 minutes earlier.

Area forecast discussion, Feb 13, 11:25 AM CST, 3 hours 53 minutes before
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Hazardous weather outlook, Feb 13, 2:00 PM CST, 1 hour 18 minutes before
Hazardous Weather Outlook
National Weather Service Brownsville TX
200 PM CST Sat Feb 13 2021

TXZ248>257-351-353-132300-
Zapata-Jim Hogg-Brooks-Inland Kenedy-Starr-Southern Hidalgo-
Inland Willacy-Inland Cameron-Coastal Willacy-Coastal Cameron-
Coastal Kenedy-Northern Hidalgo-
200 PM CST Sat Feb 13 2021

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

.DAY ONE...Today and Tonight

A Wind Chill Advisory is in effect for all of Deep South Texas
except for the Coastal sections of Kenedy, Willacy and Cameron
Counties.

A Freeze Watch remains in effect for Zapata, Jim Hogg, Brooks, and
inland Kenedy County from 2 AM CST to 9 AM CST Sunday.

There is a Moderate Risk of rip currents at the beaches of South
Padre Island and at Boca Chica Beach.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

An elevated risk of rip currents is possible at the local beaches
through the entire period.

A Winter Storm Watch is in effect for all of Deep South Texas except
for the Coastal sections of Kenedy, Willacy and Cameron Counties for
Sunday Night through Monday morning for the potential for
periods of light freezing rain or light sleet.

A Wind Advisory is possible for the central and eastern portions
of Deep South Texas and the Rio Grande Valley on Monday.

A Wind Chill Warning may be needed for portions of the lower Rio
Grande Valley and Deep South Texas from Sunday night into Monday
morning and again Monday evening into Tuesday morning, with wind
chill values dipping into the teens and 20s.

A Freeze Watch may be needed across the northern ranchlands and
mid to upper Rio Grande Valley Monday morning and across the mid
to lower Rio Grande Valley on Tuesday morning.

A Hard Freeze Watch may be needed across the northern ranchlands
and mid to upper Rio Grande Valley on Tuesday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation requested. Please relay any information about
observed severe winter weather to the NWS while following all local,
state, and CDC guidelines.

GMZ130-132-135-150-155-170-175-132300-
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-
200 PM CST Sat Feb 13 2021

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

.DAY ONE...Today and Tonight

A Small Craft Advisory is in effect for the Gulf of Mexico waters
from 0 to 60 nautical miles offshore until Midnight Tonight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Additional Small Craft Advisories are possible along the Lower
Texas Coast Saturday night through Monday night and again
Wednesday through Thursday. Gale conditions, requiring a Gale
Warning, cannot be ruled out for Sunday night and Monday and
again on Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation requested. Please relay any information about
observed severe winter weather to the NWS while following all local,
state, and CDC guidelines.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 13, 4:50 AM CSTWind Chill AdvisoryBROBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more13 hr
Feb 13, 4:50 AM CSTWinter Storm WatchBROBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more24 hr
Feb 13, 2:18 PM CSTGale WatchBRO13 hr
Feb 13, 2:56 PM CSTFreeze WarningBROBrooks, Jim Hogg, Zapata20 hr
Feb 13, 3:18 PM CSTWind Chill WatchBROBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more13 hr

Nearby

Winter Weather Advisories in Texas, 2021Every winter weather advisory in 2021

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.