Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 235, NWS Lubbock, TX

August 7, 2017Lynn County, Terry County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Aug 7, 2017, 7:37 PM CDT for Lynn County, Terry County, Texas. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 7, 2017, 7:37 PM CDT (00:37 UTC)
Expired
Aug 7, 2017, 8:00 PM CDT
In force
23 min
Issued by
NWS Lubbock, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Lynn County, TX, Terry County, TX

The radar

The Lubbock radar (KLBB), 58 km from the middle of the area, began a volume at 00:37 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

Midland Regional, TX (KMAF), launched 00:00Z, 0.6 hours before the alert went out and 137 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, Midland Regional, TX at 00:00Z on 2017-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 468 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, Midland Regional, TX at 00:00Z on 2017-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 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
468 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1574 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-29 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lubbock, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 2:44 PM CDT, 4 hours 53 minutes earlier.

Area forecast discussion, Aug 7, 2:44 PM CDT, 4 hours 53 minutes before
Area Forecast Discussion
National Weather Service Lubbock TX
244 PM CDT Mon Aug 7 2017

.DISCUSSION...

Afternoon radar analysis showed a small MCS developing over the
northern TX Panhandle moving to the SSE. Short term models keep this
complex together, bringing it into the FA between 2000 and 2100Z.
While the heaviest activity is expected to remain west of the I-27
corridor, a few places to the east may receive some of the
stratiform precip with this almost PS type MCS. By 4Z, the brunt of
the activity should be moving into the Permian Basin, though some
light shower activity may fill in overnight. Therefore, left slight
mention PoPs in through the morning.

Tomorrow, much like today, brings easterly winds with moisture
lingering, but a good lifting mechanism will still be absent from
the picture. We'll once again be left with convection firing from
the high terrain of NM/CO from minor short wave activity and
propagating our way off of NW flow for the most part. However, the
position of the high, and this will be true of Wednesday and
Thursday especially, will actually steer the NW flow to favor more
of the TX Panhandle, leaving much of our area to miss out on
beneficial rain. As this happens, the lack of rain, as well as fewer
clouds, will lead to warming temperatures through the rest of the
week.

Models split at the end of the week on the fate of our NW flow. The
GFS would be a more favorable solution with it keeping NW flow
throughout the weekend as a front is progged to push through on
Sunday. This would greatly enhance our rain chances and help keep
temperatures on the cooler side. The ECMWF goes more zonal on
Friday, staying so through the weekend, which would lead to a drier
and warmer solution. Cotton crops around here would mostly likely
favor the GFS at this point.

&&

.LUB WATCHES/WARNINGS/ADVISORIES...
None.
&&

74/74
Hazardous weather outlook, Aug 7, 3:02 PM CDT, 4 hours 35 minutes before
Hazardous Weather Outlook
National Weather Service Lubbock TX
302 PM CDT Mon Aug 7 2017

TXZ021>044-082015-
Parmer-Castro-Swisher-Briscoe-Hall-Childress-Bailey-Lamb-Hale-
Floyd-Motley-Cottle-Cochran-Hockley-Lubbock-Crosby-Dickens-King-
Yoakum-Terry-Lynn-Garza-Kent-Stonewall-
302 PM CDT Mon Aug 7 2017

This Hazardous Weather Outlook is for the South Plains...Rolling
Plains and the far Southern Texas Panhandle.

.DAY ONE...This Afternoon and Tonight

A complex of thunderstorms will move from north to south across
the extreme southwest Panhandle and the western South Plains late
this afternoon and evening. These storms will have a small
potential to produce wind gusts to 65 mph and heavy rainfall that
may lead to some localized flooding. These threats are greatest to
the west of a Tulia to Tahoka line.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is unlikely to be needed this afternoon and
evening.

In the hours before

Local storm report, Aug 7, 6:38 PM CDT, 59 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 Lubbock, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 7:04 PM CDTAreal Flood AdvisoryLUBHockley, Lubbock, Lynn, Terry56 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017Every severe thunderstorm warning 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.