Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 123, NWS San Angelo, TX

June 18, 2011Nolan County, Taylor County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Jun 18, 2011, 5:21 PM CDT for Nolan County, Taylor County, Texas. It was in force for 54 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
Jun 18, 2011, 5:21 PM CDT (22:21 UTC)
Expired
Jun 18, 2011, 6:15 PM CDT
In force
54 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon

Counties Nolan County, TX, Taylor County, TX

The radar

The Dyess AFB radar (KDYX), 88 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 18, 3:54 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.4 hours before the alert went out and 274 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, Fort Worth, TX at 12:00Z on 2011-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1462 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, Fort Worth, TX at 12:00Z on 2011-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.193958Sfc1 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
1462 J/kg
Mixed-layer CIN
-525 J/kg
Mixed-layer LCL
1240 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
242 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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 4:10 PM CDT, 1 hour 11 minutes earlier.

Area forecast discussion, Jun 18, 4:10 PM CDT, 1 hour 11 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>
Hazardous weather outlook, Jun 18, 3:32 PM CDT, 1 hour 49 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
332 PM CDT SAT JUN 18 2011

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-192045-
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-
332 PM CDT SAT JUN 18 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A HEAT ADVISORY REMAINS IN EFFECT FOR THIS AFTERNOON AND TONIGHT
ACROSS MUCH OF WEST CENTRAL TEXAS...INCLUDING AREAS EAST OF A LINE
FROM SWEETWATER...TO ROBERT LEE...TO SAN ANGELO. HEAT INDEX VALUES
ARE FORECAST TO REACH OR BRIEFLY EXCEED 105 DEGREES THIS AFTERNOON
WITH OVERNIGHT LOWS REMAINING ABOVE 75 DEGREES. TAKE EXTRA
PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE.

ISOLATED AFTERNOON THUNDERSTORMS WILL BE POSSIBLE ALONG AND NORTH
OF A LINE FROM SONORA...TO EDEN...TO BROWNWOOD. ORGANIZED SEVERE
WEATHER IS NOT EXPECTED...BUT A FEW STORMS COULD PRODUCE BRIEF
GUSTY WINDS AND DANGEROUS CLOUD TO GROUND LIGHTNING.

ELEVATED FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON AND
EVENING DUE TO THE COMBINATION OF GUSTY SOUTH WINDS...HOT
TEMPERATURES AND LOW RELATIVE HUMIDITIES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED SUNDAY ACROSS THE
BIG COUNTRY DUE THE COMBINATION OF STRONG SOUTH WINDS...HOT
TEMPERATURES AND LOW RELATIVE HUMIDITIES. A FIRE WEATHER WATCH IS
IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING.

HEAT INDEX VALUES ARE FORECAST TO BRIEFLY EXCEED 105 DEGREES ON
SUNDAY ACROSS MUCH OF THE BIG COUNTRY...CONCHO VALLEY AND
HEARTLAND. A HEAT ADVISORY REMAINS IN EFFECT THROUGH 10 PM SUNDAY
EVENING. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME
OUTSIDE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, Jun 18, 5:04 PM CDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
504 PM CDT SAT JUN 18 2011

TXZ054-065-066-127-182300-
NOLAN TX-RUNNELS TX-TAYLOR TX-COKE TX-
504 PM CDT SAT JUN 18 2011

...SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 600 PM CDT FOR NOLAN
COUNTY...
RUNNELS AND COKE COUNTIES...
TAYLOR COUNTY...

AT 506 PM CDT...A STRONG THUNDERSTORM WAS INDICATED BY NATIONAL
WEATHER SERVICE DOPPLER RADAR 7 MILES SOUTHWEST OF NOLAN...OR ABOUT 7
MILES NORTH OF BLACKWELL...MOVING EAST AT 15 MPH.

* THE STRONG THUNDERSTORM WILL BE NEAR...
  NOLAN AND HYLTON BY 520 PM CDT
  HAPPY VALLEY BY 535 PM CDT
  LAKE ABILENE BY 600 PM CDT

SMALL HAIL AND WIND GUSTS TO 55 MPH ARE LIKELY WITH THIS STORM.
RESIDENTS ARE ENCOURAGED TO MONITOR THE SITUATION CLOSELY AND BE
PREPARED TO TAKE THE PROPER ACTIONS SHOULD A WARNING BE ISSUED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
SATURDAY EVENING FOR NORTH CENTRAL TEXAS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 2:57 PM CDTFire Weather WatchSJTCallahan, Fisher, Haskell, Jones, Nolan, Shackelford and 2 more13 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2011Every severe thunderstorm warning in 2011

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.