Alert archive / Texas / Winter Weather Advisories in 2021

Winter Weather Advisory 3, NWS Corpus Christi, TX

February 17, 20216 counties in Texas

NWS Corpus Christi, TX issued this winter weather advisory at Feb 17, 2021, 2:56 PM CST for 6 counties in Texas. It took effect at Feb 18, 2021, 3:00 AM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Feb 17, 2021, 2:56 PM CST (20:56 UTC)
In effect from
Feb 18, 2021, 3:00 AM CST
Expired
Feb 18, 2021, 6:00 PM CST
In force
15 hr
Issued by
NWS Corpus Christi, TX

Counties Bee County, TX, Goliad County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Victoria County, TX

The radar

The Corpus Christi radar (KCRP), 91 km from the middle of the area, began a volume at 20:59 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, 8.9 hours before the alert went out and 105 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 2021-02-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 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 2021-02-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 330 square meters per square second.1939587897Sfc1 km3 km6 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
47 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
253 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
330 m²/s²
0-3 km storm-relative helicity
469 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 Corpus Christi, TX wrote its last area forecast discussion before this winter weather advisory went out at Feb 16, 5:54 PM CST, 21 hours 2 minutes earlier.

Area forecast discussion, Feb 16, 5:54 PM CST, 21 hours 2 minutes before
Area Forecast Discussion
National Weather Service Corpus Christi TX
554 PM CST Tue Feb 16 2021

.AVIATION...

All sites excluding LRD expected to see LIFR conditions from
around 00z this evening to 12z Wednesday morning as a nearby
coastal trough brings a low stratus deck into the area. LRD is
expected to remain MVFR through this TAF cycle. Have extended the
potential for freezing drizzle south to include ALI and CRP as
temperatures have not warmed up as previously expected and are
still below freezing. Light ice accumulations are possible as the
precipitation pushes through tonight into tomorrow. All sites are
expected to return to MVFR conditions by 21z Wednesday.

&&

.PRELIMINARY POINT TEMPS/POPS...
Corpus Christi    36  51  32  42  25  /  70  20  10  10   0
Victoria          30  44  28  39  21  /  80  40  20  10   0
Laredo            34  57  33  45  27  /  20   0  10  10   0
Alice             33  52  31  43  24  /  60  10  10  10   0
Rockport          37  51  32  42  26  /  80  30  10  10   0
Cotulla           29  54  31  42  24  /  40  10  30  20   0
Kingsville        35  54  33  44  24  /  60  10  10  10   0
Navy Corpus       39  51  35  43  29  /  80  20  10  10   0

&&

.CRP WATCHES/WARNINGS/ADVISORIES...
TX...Winter Weather Advisory until 6 AM CST Wednesday For the
     following zones: Inland Calhoun...Inland Nueces...Inland
     Refugio...Inland San Patricio...Jim Wells.

     Winter Weather Advisory until 6 AM CST Wednesday For the
     following zones: Duval...La Salle...McMullen.

     Winter Storm Warning until 6 AM CST Wednesday For the following
     zones: Bee...Goliad...Live Oak...Victoria.

GM...None.

&&

HAA/72...AVIATION
Hazardous weather outlook, Feb 16, 4:03 PM CST, 22 hours 53 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 16, 7:33 PM CSTSmall Craft AdvisoryCRP61 hr
Feb 16, 10:21 PM CSTFreeze WarningCRPBee, Calhoun, Duval, Goliad, Jim Wells, Kleberg and 8 more11 hr
Feb 17, 2:53 PM CSTFreeze WarningCRPAransas, Bee, Calhoun, Duval, Goliad, Jim Wells and 8 more18 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.