Alert archive / Texas / Freeze Watches in 2021

Freeze Watch 1, NWS Brownsville, TX

February 12, 20214 counties in Texas

NWS Brownsville, TX issued this freeze watch at Feb 12, 2021, 4:17 PM CST for 4 counties in Texas. It took effect at Feb 14, 2021, 2:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Feb 12, 2021, 4:17 PM CST (22:17 UTC)
In effect from
Feb 14, 2021, 2:00 AM CST
Expired
Feb 13, 2021, 2:56 PM CST
In force
Issued by
NWS Brownsville, TX

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

The radar

The Corpus Christi radar (KCRP), 126 km from the middle of the area, began a volume at 22:20 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, 10.3 hours before the alert went out and 135 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 2021-02-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 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 2021-02-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
8 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
408 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
52 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 freeze watch 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 freeze watch went out at Feb 12, 3:43 PM CST, 34 minutes earlier.

Area forecast discussion, Feb 12, 3:43 PM CST, 34 minutes before
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Hazardous weather outlook, Feb 12, 4:37 AM CST, 11 hours 40 minutes before
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In the hours before

Special weather statement, Feb 12, 10:26 AM CST, 5 hours 51 minutes before
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Special weather statement, Feb 12, 12:44 PM CST, 3 hours 33 minutes before
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<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Feb 11, 11:17 PM CSTSpecial Weather StatementBROCameron58 min
Feb 12, 6:32 AM CSTSpecial Weather StatementBROCameron, Willacy43 min

Nearby

Freeze Watches in Texas, 2021Every freeze watch 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.