Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 52, NWS San Angelo, TX

April 12, 20204 counties in Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 12, 2020, 3:02 AM CDT for 4 counties in Texas. It was in force for 58 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
Apr 12, 2020, 3:02 AM CDT (08:02 UTC)
Expired
Apr 12, 2020, 4:00 AM CDT
In force
58 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Concho County, TX, Menard County, TX, Schleicher County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 41 km from the middle of the area, began a volume at 08:03 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 12, 1:59 AM CDTTornado WatchSPC6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 8.0 hours before the alert went out and 206 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 00:00Z on 2020-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3028 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 00:00Z on 2020-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 185 square meters per square second.1939587897117Sfc1 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
3028 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1174 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
185 m²/s²
0-3 km storm-relative helicity
286 m²/s²
Significant tornado parameter
4.8
Supercell composite
23.5

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 Apr 12, 12:00 AM CDT, 3 hours 2 minutes earlier.

Area forecast discussion, Apr 12, 12:00 AM CDT, 3 hours 2 minutes before
Area Forecast Discussion
National Weather Service San Angelo TX
1200 AM CDT Sun Apr 12 2020

.AVIATION...
/06Z TAFS/

Scattered to numerous showers and thunderstorms will continue to
develop across the area overnight. Included VCTS at all sites,
with most convection ending by 12Z. In addition, patchy MVFR
ceilings will be possible. West winds will increase to 15 to 25
knots, with higher gusts, by mid morning. A cold front will move
through the area Sunday evening, resulting in north winds of 10 to
20 knots with higher gusts.

&&

.PREV DISCUSSION... /issued 629 PM CDT Sat Apr 11 2020/

AVIATION...
/00Z TAFS/

Chances for brief thunderstorms this evening for most terminals,
followed by another round between 04-08Z. VFR outside of
thunderstorms. Rapid wind shifts expected in and during
thunderstorms with large hail and strong winds possible.
Thunderstorm threat ends by 12Z, but strong winds expected through
the day.

SK

PREV DISCUSSION... /issued 328 PM CDT Sat Apr 11 2020/

SHORT TERM...
(Tonight)

.Severe Thunderstorms...

Look for thunderstorms this afternoon and tonight, as another
upper disturbance moves over the region. The Storm Prediction
Center has all of West Central Texas in an Enhanced Risk Area,
through sunrise Sunday morning. The main hazards are tornadoes,
very large hail, damaging winds, and deadly lightning.

(Sunday)

.Breezy and Another Cold Front...

As another cold front, this one unusually strong for mid April,
moves closer to West Central Texas, gusty winds, from the west,
will develop Sunday. Then, the cold front may begin to move into
the Big Country, by mid afternoon. Although this front will be a
dry front, it will bring gusty winds from the north, along with
uncharacteristically cold temperatures, for mid April.

LONG TERM...
(Sunday night through Saturday)

.Much Cooler Temperatures then a Warmup...

Much cooler temperatures will dominate through mid week, before a
warming trend begins. Overnight lows Monday night, likely in the
mid to upper 30s, will be unusually cold, for mid April. Plus, the
wind chill Monday night, may be in the mid to upper 20s. Cooler
than usual temperatures will continue until Wednesday; then, a
warming trend will push temperatures back above usual mid April
temperatures for Friday and Saturday.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene 	 78  56  77  35 /  50  50   0   0
San Angelo 	 84  55  80  38 /  30  50   0   0
Junction 	 81  57  79  40 /  30  80   0   0
Brownwood 	 75  58  77  36 /  40  70   5   0
Sweetwater 	 79  54  77  35 /  50  40   0   0
Ozona      	 84  54  80  40 /  20  50   0   0

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
None.
&&

Daniels
Hazardous weather outlook, Apr 11, 2:48 PM CDT, 12 hours 14 minutes before
Hazardous Weather Outlook
National Weather Service San Angelo TX
248 PM CDT Sat Apr 11 2020

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-122000-
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-
248 PM CDT Sat Apr 11 2020

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

.DAY ONE...This Afternoon and Tonight

Expect severe thunderstorms. Hazards include tornadoes, very
large hail, damaging winds, and ever-present deadly lightning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

The threat for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...
We will likely need spotters this afternoon and evening. 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 12, 12:18 AM CDT, 2 hours 44 minutes before
Special Weather Statement
National Weather Service San Angelo TX
1218 AM CDT Sun Apr 12 2020

TXZ076-077-120600-
Schleicher TX-Crockett TX-
1218 AM CDT Sun Apr 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SCHLEICHER AND
NORTHEASTERN CROCKETT COUNTIES UNTIL 100 AM CDT...

At 1217 AM CDT, Doppler radar was tracking a strong thunderstorm over
Ozona, moving northeast at 40 mph.

Penny size hail will be possible with this storm.

This storm will remain over mainly rural areas of northwestern
Schleicher and northeastern Crockett Counties, including the
following locations... Us-190 Near The Crockett-
Sutton County Line and The Intersection Of Us 190 And Highway 163.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3064 10144 3108 10145 3108 10070 3059 10105
TIME...MOT...LOC 0517Z 230DEG 35KT 3070 10119

SK
Special weather statement, Apr 12, 1:34 AM CDT, 1 hour 28 minutes before
Special Weather Statement
National Weather Service San Angelo TX
134 AM CDT Sun Apr 12 2020

TXZ072-073-077-120715-
Schleicher TX-Tom Green TX-Concho TX-
134 AM CDT Sun Apr 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SCHLEICHER...
SOUTHEASTERN TOM GREEN AND WESTERN CONCHO COUNTIES UNTIL 215 AM
CDT...

At 133 AM CDT, Doppler radar was tracking a strong thunderstorm 11
miles southeast of Christoval, moving northeast at 40 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Vancourt around 200 AM CDT.
  Eola around 210 AM CDT.

Other locations impacted by this storm include Vick, The Intersection
Of Ranch Road 380 And Ranch Road 381 and The Intersection Of Us-
83 And Ranch Road 765.

LAT...LON 3094 10037 3109 10054 3158 10014 3158 10011
      3135 9974
TIME...MOT...LOC 0633Z 227DEG 33KT 3111 10034

Daniels
Special weather statement, Apr 12, 2:15 AM CDT, 47 minutes before
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Special weather statement, Apr 12, 2:20 AM CDT, 42 minutes before
Special Weather Statement
National Weather Service San Angelo TX
220 AM CDT Sun Apr 12 2020

TXZ049-113-120800-
Fisher TX-Jones TX-
220 AM CDT Sun Apr 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JONES AND NORTHERN
FISHER COUNTIES UNTIL 300 AM CDT...

At 220 AM CDT, Doppler radar was tracking a strong thunderstorm near
Hobbs, or 16 miles east of Snyder, moving northeast at 40 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Rotan around 240 AM CDT.

Other locations impacted by this storm include Hitson.

LAT...LON 3296 10002 3291 9996 3258 10066 3296 10065
TIME...MOT...LOC 0720Z 227DEG 34KT 3277 10064

Daniels
Special weather statement, Apr 12, 2:40 AM CDT, 22 minutes before
Special Weather Statement
National Weather Service San Angelo TX
240 AM CDT Sun Apr 12 2020

TXZ064-065-071-072-076-120830-
Irion TX-Tom Green TX-Crockett TX-Coke TX-Sterling TX-
240 AM CDT Sun Apr 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COKE...SOUTHERN
STERLING...NORTHWESTERN TOM GREEN...EASTERN CROCKETT AND IRION
COUNTIES UNTIL 330 AM CDT...

At 240 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles west of Sterling City to 10 miles
north of Terrell County Gas Plant. Movement was east at 30 mph.

Pea size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Strong thunderstorms will be near...
  Sterling City around 300 AM CDT.
  Broome around 320 AM CDT.
  Water Valley around 330 AM CDT.

Other locations impacted by these storms include The Intersection Of
Us 190 And Highway 163, The Intersection Of Ranch Road 2083 And
Highway 405, I-10 Near The Crockett-Pecos County Line, Us-
87 Near The Coke-
Tom Green County Line, Ft Lancaster, The Intersection Of I-
10 And Highway 405 and The Intersection Of I-10 And Highway 290.

A Tornado Watch remains in effect until 800 AM CDT for west central
Texas.

LAT...LON 3041 10173 3047 10173 3047 10169 3055 10165
      3062 10166 3066 10177 3076 10183 3108 10166
      3108 10127 3177 10127 3188 10121 3188 10055
      3034 10136
TIME...MOT...LOC 0740Z 273DEG 26KT 3178 10117 3052 10189

Daniels
Local storm report, Apr 12, 2:58 AM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
258 AM CDT SUN APR 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0218 AM     HAIL             ELDORADO                30.86N 100.60W
04/12/2020  E1.00 INCH       SCHLEICHER         TX   AMATEUR RADIO

            NICKEL TO QUARTER SIZE HAIL REPORTED.

&&

SJH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 7:08 PM CDTSevere Thunderstorm WarningSJTIrion, Tom Green52 min
Apr 11, 7:10 PM CDTSevere Thunderstorm WarningSJTShackelford, Throckmorton35 min
Apr 11, 7:33 PM CDTSpecial Weather StatementSJTRunnels42 min
Apr 11, 7:38 PM CDTSevere Thunderstorm WarningSJTShackelford37 min
Apr 11, 7:52 PM CDTSevere Thunderstorm WarningSJTConcho, Tom Green36 min
Apr 11, 8:26 PM CDTSpecial Weather StatementSJTConcho49 min
Apr 11, 9:04 PM CDTSpecial Weather StatementSJTSterling41 min
Apr 11, 10:37 PM CDTSpecial Weather StatementSJTCrockett38 min
Apr 11, 11:30 PM CDTSpecial Weather StatementSJTCrockett45 min
Apr 12, 12:18 AM CDTSpecial Weather StatementSJTCrockett42 min
Apr 12, 1:07 AM CDTSevere Thunderstorm WarningSJTCrockett, Schleicher53 min
Apr 12, 1:28 AM CDTSevere Thunderstorm WarningSJTCrockett62 min
Apr 12, 1:34 AM CDTSpecial Weather StatementSJTConcho41 min
Apr 12, 1:35 AM CDTTornado WarningSJTCrockett, Schleicher, Sutton25 min
Apr 12, 1:58 AM CDTSevere Thunderstorm WarningSJTSchleicher, Sutton, Tom Green62 min
Apr 12, 2:13 AM CDTTornado WarningSJTSchleicher13 min
Apr 12, 2:15 AM CDTSpecial Weather StatementSJTConcho45 min
Apr 12, 2:19 AM CDTSevere Thunderstorm WarningSJTCrockett56 min
Apr 12, 2:20 AM CDTSpecial Weather StatementSJTFisher40 min
Apr 12, 2:37 AM CDTAreal Flood AdvisorySJTTom Green2 hr
Apr 12, 2:40 AM CDTSpecial Weather StatementSJTCoke, Crockett, Irion, Sterling50 min
Apr 12, 3:01 AM CDTSevere Thunderstorm WarningSJTCoke, Crockett, Irion, Runnels, Schleicher, Sterling and 1 more59 min
Apr 12, 3:22 AM CDTSpecial Weather StatementSJTCoke, Nolan38 min
Apr 12, 3:36 AM CDTSevere Thunderstorm WarningSJTConcho, McCulloch, Menard54 min
Apr 12, 3:50 AM CDTTornado WarningSJTConcho, McCulloch25 min
Apr 12, 4:02 AM CDTSpecial Weather StatementSJTColeman, Runnels43 min
Apr 12, 4:08 AM CDTTornado WarningSJTMcCulloch31 min
Apr 12, 4:13 AM CDTSevere Thunderstorm WarningSJTBrown, Coleman, McCulloch, San Saba48 min
Apr 12, 4:47 AM CDTSpecial Weather StatementSJTBrown, Coleman, McCulloch43 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning in 2020

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.