Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS San Angelo, TX

April 15, 2021Mason County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 15, 2021, 12:00 PM CDT for Mason County, Texas. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 15, 2021, 12:00 PM CDT (17:00 UTC)
Expired
Apr 15, 2021, 12:45 PM CDT
In force
45 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon
Hail
1.75 in
Wind
50.0 mph

County Mason County, TX

The radar

The Austin/San Antonio radar (KEWX), 148 km from the middle of the area, began a volume at 17:03 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.

What was reported inside it

TimeReportWhereRemark
Apr 15, 12:29 PM CDTHAIL 2.751 S Loyal Valley, TXTHE PUBLIC REPORTED GOLF BALL TO BASEBALL SIZE HAIL 1 MILE SOUTH OF LOYAL VALLEY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 15, 8:36 AM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 5.0 hours before the alert went out and 210 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, Del Rio, TX at 12:00Z on 2021-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2593 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, Del Rio, TX at 12:00Z on 2021-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 square meters per square second.19395878Sfc1 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
2593 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
338 m²/s²
Significant tornado parameter
4.6
Supercell composite
21.4

Open this sounding in Storm Lab

The text

As transmitted.

505 
WUUS54 KSJT 151700
SVRSJT
TXC319-151745-
/O.NEW.KSJT.SV.W.0049.210415T1700Z-210415T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Angelo TX
1200 PM CDT Thu Apr 15 2021

The National Weather Service in San Angelo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Mason County in west central Texas...

* Until 1245 PM CDT.

* At 1200 PM CDT, a severe thunderstorm was located 8 miles west of
  Hilda, or 9 miles south of Mason, moving east at 35 mph.

  HAZARD...Golf ball size hail.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles.

* This severe thunderstorm will be near...
  Hedwigs Hill and Hilda around 1215 PM CDT.
  Art around 1220 PM CDT.
  Loyal Valley around 1225 PM CDT.

Other locations impacted by this severe thunderstorm include Us-
87 Near The Mason-Gillespie County Line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3050 9930 3067 9934 3081 9897 3050 9897
TIME...MOT...LOC 1700Z 249DEG 29KT 3061 9925 

HAIL...1.75IN
WIND...<50MPH
 
$$

JW
3 follow-up statements
019 
WWUS54 KSJT 151707
SVSSJT

Severe Weather Statement
National Weather Service San Angelo TX
1207 PM CDT Thu Apr 15 2021

TXC319-151745-
/O.CON.KSJT.SV.W.0049.000000T0000Z-210415T1745Z/
Mason TX-
1207 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR SOUTHEASTERN MASON COUNTY...

At 1206 PM CDT, a severe thunderstorm was located near Hilda, or 9
miles south of Mason, moving east at 30 mph.

HAZARD...Two inch hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Hilda and Hedwigs Hill around 1215 PM CDT.
  Art around 1220 PM CDT.
  Loyal Valley around 1225 PM CDT.

Other locations impacted by this severe thunderstorm include Us-
87 Near The Mason-Gillespie County Line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3050 9926 3069 9929 3081 9897 3050 9897
TIME...MOT...LOC 1706Z 257DEG 28KT 3061 9919 

HAIL...2.00IN
WIND...<50MPH
 
$$

JW
604 
WWUS54 KSJT 151721
SVSSJT

Severe Weather Statement
National Weather Service San Angelo TX
1221 PM CDT Thu Apr 15 2021

TXC319-151745-
/O.CON.KSJT.SV.W.0049.000000T0000Z-210415T1745Z/
Mason TX-
1221 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR SOUTHEASTERN MASON COUNTY...

At 1220 PM CDT, a severe thunderstorm was located over Hilda, or 14
miles southeast of Mason, moving east at 30 mph.

HAZARD...Tennis ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Loyal Valley around 1225 PM CDT.

Other locations impacted by this severe thunderstorm include Us-
87 Near The Mason-Gillespie County Line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3050 9916 3063 9918 3069 9897 3050 9897
TIME...MOT...LOC 1720Z 267DEG 27KT 3059 9907 

HAIL...2.50IN
WIND...<50MPH
 
$$

JW
982 
WWUS54 KSJT 151737
SVSSJT

Severe Weather Statement
National Weather Service San Angelo TX
1237 PM CDT Thu Apr 15 2021

TXC319-151747-
/O.EXP.KSJT.SV.W.0049.000000T0000Z-210415T1745Z/
Mason TX-
1237 PM CDT Thu Apr 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MASON COUNTY WILL
EXPIRE AT 1245 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 300 PM CDT for
west central Texas.

LAT...LON 3050 9916 3063 9918 3069 9897 3050 9897
TIME...MOT...LOC 1737Z 249DEG 29KT 3064 9893 

$$

JW

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 8:20 AM CDTSevere Thunderstorm WarningSJTCrockett, Schleicher, Sutton40 min
Apr 15, 8:48 AM CDTSpecial Weather StatementSJTSchleicher42 min
Apr 15, 9:01 AM CDTSevere Thunderstorm WarningSJTSchleicher, Sutton44 min
Apr 15, 9:22 AM CDTSpecial Weather StatementSJTKimble38 min
Apr 15, 9:34 AM CDTSevere Thunderstorm WarningSJTKimble, Sutton41 min
Apr 15, 9:38 AM CDTSpecial Weather StatementSJTConcho37 min
Apr 15, 9:45 AM CDTSevere Thunderstorm WarningSJTKimble, Menard, Schleicher, Sutton45 min
Apr 15, 10:03 AM CDTSevere Thunderstorm WarningSJTKimble, Menard42 min
Apr 15, 10:27 AM CDTSevere Thunderstorm WarningSJTMcCulloch, Menard33 min
Apr 15, 10:34 AM CDTSevere Thunderstorm WarningSJTKimble41 min
Apr 15, 10:42 AM CDTSpecial Weather StatementSJTRunnels48 min
Apr 15, 10:54 AM CDTSevere Thunderstorm WarningSJTMcCulloch, Mason, Menard51 min
Apr 15, 11:31 AM CDTSevere Thunderstorm WarningSJTBrown, McCulloch, San Saba44 min
Apr 15, 11:46 AM CDTSpecial Weather StatementSJTMason29 min
Apr 15, 11:58 AM CDTSevere Thunderstorm WarningSJTBrown, McCulloch, San Saba47 min
Apr 15, 12:33 PM CDTSpecial Weather StatementSJTColeman42 min
Apr 15, 12:34 PM CDTSpecial Weather StatementSJTThrockmorton41 min
Apr 15, 12:53 PM CDTSevere Thunderstorm WarningSJTShackelford, Throckmorton37 min
Apr 15, 1:27 PM CDTSevere Thunderstorm WarningSJTBrown, Coleman48 min
Apr 15, 1:54 PM CDTSpecial Weather StatementSJTColeman36 min
Apr 15, 2:07 PM CDTSpecial Weather StatementSJTSan Saba38 min
Apr 15, 2:18 PM CDTSevere Thunderstorm WarningSJTSan Saba16 min
Apr 15, 2:29 PM CDTSpecial Weather StatementSJTSan Saba31 min
Apr 15, 2:38 PM CDTSevere Thunderstorm WarningSJTSan Saba37 min
Apr 15, 2:40 PM CDTSpecial Weather StatementSJTBrown35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.