Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS San Angelo, TX

April 28, 2021Shackelford County, Texas

NWS San Angelo, TX issued this special weather statement at Apr 28, 2021, 6:04 AM CDT for Shackelford County, Texas. It was in force for 41 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: Apr 28, 2021, 6:04 AM CDT (11:04 UTC)
Expired: Apr 28, 2021, 6:45 AM CDT
In force: 41 min
Issued by: NWS San Angelo, TX

County Shackelford County, TX

The radar

The Dyess AFB radar (KDYX), 8 km from the middle of the area, began a volume at 11:04 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

Fort Worth, TX (KFWD), launched 00:00Z, 11.1 hours before the alert went out and 191 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 692 J/kg
Mixed-layer CIN: -275 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 388 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 San Angelo, TX wrote its last area forecast discussion before this special weather statement went out at Apr 28, 4:17 AM CDT, 1 hour 47 minutes earlier.

Area forecast discussion, Apr 28, 4:17 AM CDT, 1 hour 47 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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.
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      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Apr 28, 5:49 AM CDT, 15 minutes before

Hazardous Weather Outlook
National Weather Service San Angelo TX
549 AM CDT Wed Apr 28 2021

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-291100-
Fisher-Nolan-Sterling-Coke-Runnels-Irion-Tom Green-Concho-
Crockett-Schleicher-Sutton-Haskell-Throckmorton-Jones-Shackelford-
Taylor-Callahan-Coleman-Brown-McCulloch-San Saba-Menard-Kimble-
Mason-
549 AM CDT Wed Apr 28 2021

This Hazardous Weather Outlook is for portions of west central
Texas.

.DAY ONE...Today and Tonight

A slight risk of severe thunderstorms will continue across West
Central Texas today and tonight. Large hail, damaging winds and
localized flooding are the main threats. An isolated tornado is
also possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...
Spotter activation will likely be needed today and tonight.
Please relay any information about observed weather to the NWS
while following all local, state and CDC guidelines.

In the hours before

Special weather statement, Apr 28, 4:28 AM CDT, 1 hour 36 minutes before

Special Weather Statement
National Weather Service San Angelo TX
428 AM CDT Wed Apr 28 2021

TXZ054-064-065-281015-
Nolan TX-Coke TX-Sterling TX-
428 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN COKE...STERLING AND
SOUTHWESTERN NOLAN COUNTIES UNTIL 515 AM CDT...

At 427 AM CDT, Doppler radar was tracking a strong thunderstorm 9
miles southwest of Sterling City, moving northeast at 45 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Sterling City around 440 AM CDT.
  Silver around 510 AM CDT.

Other locations impacted by this storm include The Intersection Of
Highway 158 And Ranch Road 2059.

A Tornado Watch remains in effect until 1000 AM CDT for west central
Texas.

LAT...LON 3192 10126 3209 10105 3208 10067 3220 10066
      3195 10047 3155 10119 3156 10127
TIME...MOT...LOC 0927Z 230DEG 38KT 3177 10112

Daniels

Special weather statement, Apr 28, 4:57 AM CDT, 1 hour 7 minutes before

Special Weather Statement
National Weather Service San Angelo TX
457 AM CDT Wed Apr 28 2021

TXZ064-071-072-281045-
Irion TX-Tom Green TX-Sterling TX-
457 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN STERLING...NORTHWESTERN
TOM GREEN AND NORTHWESTERN IRION COUNTIES UNTIL 545 AM CDT...

At 457 AM CDT, Doppler radar was tracking a strong thunderstorm 18
miles north of Barnhart, or 19 miles northeast of Big Lake, moving
northeast at 45 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Water Valley and Broome around 545 AM CDT.

Other locations impacted by this storm include Us-87 Near The Coke-
Tom Green County Line.

LAT...LON 3167 10127 3190 10107 3175 10082 3170 10083
      3170 10074 3161 10060 3128 10127
TIME...MOT...LOC 0957Z 234DEG 38KT 3139 10124

Daniels

Special weather statement, Apr 28, 5:03 AM CDT, 1 hour 1 minute before

Special Weather Statement
National Weather Service San Angelo TX
503 AM CDT Wed Apr 28 2021

TXZ054-065-127-281045-
Nolan TX-Coke TX-Taylor TX-
503 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL COKE...NOLAN AND
WEST CENTRAL TAYLOR COUNTIES UNTIL 545 AM CDT...

At 503 AM CDT, Doppler radar was tracking a strong thunderstorm over
Silver, or 16 miles northwest of Robert Lee, moving northeast at 35
mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Maryneal around 535 AM CDT.
  Nolan around 545 AM CDT.

Other locations impacted by this storm include Camp Butman, The
Intersection Of Highway 70 And Ranch Road 53, Lake Sweetwater, The
Intersection Of Ranch Road 608 And Highway 147 and Camp Boothe Oaks.

A Tornado Watch remains in effect until 1000 AM CDT for west central
Texas.

LAT...LON 3244 10027 3235 10007 3193 10057 3208 10078
      3209 10066 3234 10067 3253 10056
TIME...MOT...LOC 1003Z 232DEG 28KT 3208 10066

Daniels

Special weather statement, Apr 28, 6:04 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service San Angelo TX
604 AM CDT Wed Apr 28 2021

TXZ113-114-127-128-281145-
Shackelford TX-Callahan TX-Jones TX-Taylor TX-
604 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN CALLAHAN...SOUTHEASTERN
JONES...SHACKELFORD AND NORTHEASTERN TAYLOR COUNTIES UNTIL 645 AM
CDT...

At 604 AM CDT, Doppler radar was tracking a strong thunderstorm near
Hamby, or near Abilene, moving northeast at 40 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Clyde around 610 AM CDT.
  Albany around 645 AM CDT.

Other locations impacted by this storm include Impact, Lake Fort
Phantom Hill, Mccarty Lake, Us-283 Near The Callahan-
Shackelford County Line and Kirby Lake.

A Tornado Watch remains in effect until 1000 AM CDT for west central
Texas.

LAT...LON 3291 9919 3251 9910 3251 9911 3247 9911
      3218 9974 3265 9978
TIME...MOT...LOC 1104Z 233DEG 36KT 3245 9963

Daniels

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 7:17 PM CDT	Special Weather Statement	SJT	Fisher	58 min
Apr 27, 7:25 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	65 min
Apr 27, 7:27 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	63 min
Apr 27, 7:33 PM CDT	Areal Flood Advisory	SJT	Fisher	117 min
Apr 27, 8:11 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	64 min
Apr 27, 8:27 PM CDT	Tornado Warning	SJT	Fisher	33 min
Apr 27, 8:29 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	61 min
Apr 27, 8:34 PM CDT	Special Weather Statement	SJT	Haskell	41 min
Apr 27, 8:46 PM CDT	Tornado Warning	SJT	Nolan	44 min
Apr 27, 8:54 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones, Nolan, Taylor	66 min
Apr 27, 8:56 PM CDT	Special Weather Statement	SJT	Haskell	64 min
Apr 27, 9:12 PM CDT	Tornado Warning	SJT	Fisher, Jones, Nolan, Taylor	48 min
Apr 27, 9:20 PM CDT	Severe Thunderstorm Warning	SJT	Jones, Shackelford	40 min
Apr 27, 9:33 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	57 min
Apr 27, 9:53 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	67 min
Apr 27, 10:01 PM CDT	Special Weather Statement	SJT	Shackelford	44 min
Apr 28, 1:11 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	64 min
Apr 28, 1:59 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones, Nolan, Taylor	61 min
Apr 28, 2:32 AM CDT	Tornado Warning	SJT	Jones	28 min
Apr 28, 2:57 AM CDT	Severe Thunderstorm Warning	SJT	Jones, Shackelford	63 min
Apr 28, 3:49 AM CDT	Tornado Warning	SJT	Shackelford	26 min
Apr 28, 3:51 AM CDT	Severe Thunderstorm Warning	SJT	Shackelford, Throckmorton	24 min
Apr 28, 4:18 AM CDT	Areal Flood Advisory	SJT	Throckmorton	3 hr
Apr 28, 4:28 AM CDT	Special Weather Statement	SJT	Coke, Sterling	47 min
Apr 28, 4:57 AM CDT	Special Weather Statement	SJT	Sterling	48 min
Apr 28, 5:03 AM CDT	Special Weather Statement	SJT	Nolan	42 min
Apr 28, 5:12 AM CDT	Areal Flood Advisory	SJT	Nolan	107 min
Apr 28, 5:34 AM CDT	Areal Flood Advisory	SJT	Taylor	3 hr
Apr 28, 6:25 AM CDT	Flash Flood Warning	SJT	Callahan, Jones, Shackelford, Taylor	3 hr
Apr 28, 6:39 AM CDT	Areal Flood Advisory	SJT	Callahan, Shackelford	3 hr
Apr 28, 6:47 AM CDT	Special Weather Statement	SJT	Shackelford	28 min
Apr 28, 9:27 AM CDT	Areal Flood Advisory	SJT	Callahan, Shackelford, Taylor	3 hr
Apr 28, 2:07 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Runnels	53 min
Apr 28, 2:52 PM CDT	Special Weather Statement	SJT	Runnels	38 min
Apr 28, 3:16 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman, Runnels, Taylor	44 min
Apr 28, 3:52 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman	38 min
Apr 28, 4:24 PM CDT	Special Weather Statement	SJT	Brown	36 min
Apr 28, 6:10 PM CDT	Special Weather Statement	SJT	Brown	50 min

Nearby

Special Weather Statements in Texas, 2021 Every special weather statement 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.