Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 29, NWS San Angelo, TX

April 9, 2020McCulloch County, San Saba County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 9, 2020, 1:03 PM CDT for McCulloch County, San Saba County, Texas. It was in force for 29 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 9, 2020, 1:03 PM CDT (18:03 UTC)
Expired
Apr 9, 2020, 1:32 PM CDT
In force
29 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties McCulloch County, TX, San Saba County, TX

The radar

The San Angelo radar (KSJT), 136 km from the middle of the area, began a volume at 18:03 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 nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 6.1 hours before the alert went out and 250 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 2020-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2020-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2843 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
89 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 Apr 9, 12:57 PM CDT, 6 minutes earlier.

Area forecast discussion, Apr 9, 12:57 PM CDT, 6 minutes before
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Hazardous weather outlook, Apr 9, 5:15 AM CDT, 7 hours 48 minutes before
Hazardous Weather Outlook
National Weather Service San Angelo TX
515 AM CDT Thu Apr 9 2020

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-101015-
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-
515 AM CDT Thu Apr 9 2020

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

.DAY ONE...Today and Tonight

Strong thunderstorms will be possible east of a Brady to Junction
line this afternoon and evening. The main concerns will be hail
and strong, gusty winds, as well as cloud to ground lightning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Strong to severe thunderstorms will be possible Friday and
Saturday afternoon and evening across much of West Central Texas.
The main concerns will be large hail and damaging winds, as well
as cloud to ground lightning.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Apr 9, 11:07 AM CDT, 1 hour 56 minutes before
Special Weather Statement
National Weather Service San Angelo TX
1107 AM CDT Thu Apr 9 2020

TXZ065-066-072-127-139-091645-
Runnels TX-Tom Green TX-Coleman TX-Coke TX-Taylor TX-
1107 AM CDT Thu Apr 9 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN COKE...NORTHWESTERN
COLEMAN...NORTHEASTERN TOM GREEN...SOUTH CENTRAL TAYLOR AND RUNNELS
COUNTIES UNTIL 1145 AM CDT...

At 1107 AM CDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Rowena, or 8 miles west of Ballinger, moving
northeast at 40 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Ballinger around 1120 AM CDT.
  Hatchel around 1125 AM CDT.
  Benoit around 1130 AM CDT.
  Crews around 1145 AM CDT.

Other locations impacted by this storm include Lake Winters Lake,
Ballinger Lake, Ovalo and Hords Creek Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3156 10019 3171 10034 3219 9980 3185 9950
TIME...MOT...LOC 1607Z 231DEG 33KT 3173 10011
Special weather statement, Apr 9, 11:49 AM CDT, 1 hour 14 minutes before
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Special weather statement, Apr 9, 12:29 PM CDT, 34 minutes before
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Local storm report, Apr 9, 12:36 PM CDT, 27 minutes before
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Special weather statement, Apr 9, 12:50 PM CDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 11:07 AM CDTSpecial Weather StatementSJTRunnels38 min
Apr 9, 11:49 AM CDTSpecial Weather StatementSJTMcCulloch41 min
Apr 9, 12:14 PM CDTSevere Thunderstorm WarningSJTBrown, McCulloch, San Saba33 min
Apr 9, 12:29 PM CDTSpecial Weather StatementSJTSan Saba46 min
Apr 9, 12:50 PM CDTSpecial Weather StatementSJTSan Saba40 min
Apr 9, 1:29 PM CDTAreal Flood AdvisorySJTMcCulloch, Mason, San Saba2 hr

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.