Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 12, NWS San Angelo, TX

March 17, 20204 counties in Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Mar 17, 2020, 7:49 PM CDT for 4 counties in Texas. It was in force for 56 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: Mar 17, 2020, 7:49 PM CDT (00:49 UTC)
Expired: Mar 17, 2020, 8:45 PM CDT
In force: 56 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Haskell County, TX, Jones County, TX, Shackelford County, TX, Throckmorton County, TX

The radar

The Dyess AFB radar (KDYX), 54 km from the middle of the area, began a volume at 00:50 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.

Issued	Product	Office	Lasted
Mar 17, 4:41 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.8 hours before the alert went out and 211 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: 307 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 7.1

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 Mar 17, 6:08 PM CDT, 1 hour 41 minutes earlier.

Area forecast discussion, Mar 17, 6:08 PM CDT, 1 hour 41 minutes before

Area Forecast Discussion
National Weather Service San Angelo TX
608 PM CDT Tue Mar 17 2020

.AVIATION...
/00Z TAFS/

Storms will continue to be the primary problem in area terminal
forecasts, with strong storms moving across many of the locations
this evening across the central and western sites, and then the
eastern sites during the early morning hours. Used the latest hi-
res models for the first forecast for storm timing. Storms will
disrupt the return of MVFR cigs back into the area for awhile, but
they should make a late return to the area after sunrise and
persist well into the morning hours.

&&

.PREV DISCUSSION... /issued 238 PM CDT Tue Mar 17 2020/

SHORT TERM...
(Tonight and Wednesday)

..Possible Severe Thunderstorms...

Short term models continue to indicate thunderstorms developing,
across West Central Texas tonight. The Storm Prediction Center has
much of West Central Texas in a Slight Risk Area, for severe
thunderstorms, until 12Z Wednesday (morning). From 12Z Wednesday,
through 00Z Thursday (Wednesday evening), all of West Central
Texas is in a Slight Risk Area, and locations mainly along and
northwest of a line from Barnhart, to San Angelo, to Talpa, and to
Atwell are in an Enhanced Risk Area. The main weather threats are
large hail, damaging winds, and deadly lightning. Plus, a surface
dryline, Wednesday afternoon, could create conditions favorable
for tornadoes. The NAM indicates a line of thunderstorms will move
through West Central Texas, from west to east, tonight. Also,
thunderstorms may produce enough rain tonight to create flash
flooding, in some areas. For Wednesday, mainly during the
afternoon. expect the same weather threats. Plus, a surface
dryline, Wednesday afternoon, could create conditions favorable
for tornado development.

LONG TERM...
(Wednesday night)

..Severe Thunderstorm Threat Continues...

As another energy pulse aloft moves over Texas Wednesday night,
another round of severe thunderstorms may develop. Also, the NAM
brings a line of thunderstorms across West Central Texas Wednesday
night. In addition, the Slight Risk and Enhanced Risk Areas
continue Wednesday night, with large hail, damaging winds, and
deadly lightning remaining the main threats. Although low, the
potential for a tornado will continue, as well.

(Thursday through Tuesday)

..Another Cold Front and More Rain...

The remainder of the long tern forecast remains highlighted with
another cold front and the potential for more rain. Models this
cycle bring the cold front, across West Central Texas, late
Thursday night into Friday. Following this front, temperatures
much cooler than usual mid March temperatures will dominate, until
low-level flow, from the southeast, returns on Sunday. As for rain
chances, the upper flow, from the southwest, will continue to
enhance the potential for showers and thunderstorms, until Sunday.
Then, as the upper pattern shifts, a ridge aloft builds over the
Plains, by Tuesday.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene 	 59  76  60  72 /  80  30  90   5
San Angelo 	 58  77  60  75 /  90  30  80   0
Junction 	 60  76  61  79 /  80  20  70   5
Brownwood 	 60  76  60  76 /  80  20  80  20
Sweetwater 	 58  76  58  69 /  70  30  80   0
Ozona      	 58  74  58  76 /  90  20  70   0

&&

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

07

Hazardous weather outlook, Mar 17, 1:05 PM CDT, 6 hours 44 minutes before

Hazardous Weather Outlook
National Weather Service San Angelo TX
105 PM CDT Tue Mar 17 2020

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-181815-
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-
105 PM CDT Tue Mar 17 2020

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

.DAY ONE...This Afternoon and Tonight

Severe thunderstorms are possible this afternoon into tonight.
The main hazards will be large hail, damaging winds, and
dangerous lightning. Also, heavy rainfall may produce localized
flash flooding.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Severe thunderstorms will be possible again Wednesday evening
through early Thursday morning. Strong, damaging winds, large hail
and a few tornadoes will be possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested on Tuesday night and
Wednesday night.

In the hours before

Special weather statement, Mar 17, 5:01 PM CDT, 2 hours 48 minutes before

Special Weather Statement
National Weather Service San Angelo TX
501 PM CDT Tue Mar 17 2020

TXZ098-172245-
Haskell TX-
501 PM CDT Tue Mar 17 2020

...SIGNIFICANT WEATHER ADVISORY FOR HASKELL COUNTY UNTIL 545 PM
CDT...

At 501 PM CDT, Doppler radar was tracking a strong thunderstorm near
Haskell, moving north at 30 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Weinert around 520 PM CDT.

Other locations impacted by this storm include Jud, Us-
277 Near The Haskell-Knox County Line and Us-380 Near The Haskell-
Stonewall County Line.

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

LAT...LON 3335 9947 3296 9961 3296 9999 3340 9999
      3340 9947
TIME...MOT...LOC 2201Z 195DEG 24KT 3321 9974

Daniels

Special weather statement, Mar 17, 5:51 PM CDT, 1 hour 58 minutes before

Special Weather Statement
National Weather Service San Angelo TX
551 PM CDT Tue Mar 17 2020

TXZ098-099-172330-
Haskell TX-Throckmorton TX-
551 PM CDT Tue Mar 17 2020

...SIGNIFICANT WEATHER ADVISORY FOR HASKELL AND NORTHWESTERN
THROCKMORTON COUNTIES UNTIL 630 PM CDT...

At 549 PM CDT, Doppler radar was tracking a strong thunderstorm near
Weinert, or 7 miles north of Haskell, moving northeast at 25 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible
with this storm. Additional strong storms will move into southwest
Haskell County by 6PM.

This strong thunderstorm will be near...
  Weinert around 600 PM CDT.
  Millers Creek Reservoir around 630 PM CDT.

Other locations impacted by this storm include Jud, Us-
277 Near The Haskell-Knox County Line and Us-380 Near The Haskell-
Stonewall County Line.

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

LAT...LON 3296 9971 3296 9999 3340 9999 3340 9927
TIME...MOT...LOC 2249Z 224DEG 24KT 3326 9970

Daniels

Special weather statement, Mar 17, 6:14 PM CDT, 1 hour 35 minutes before

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Special weather statement, Mar 17, 7:00 PM CDT, 49 minutes before

Special Weather Statement
National Weather Service San Angelo TX
700 PM CDT Tue Mar 17 2020

TXZ098-099-114-180045-
Haskell TX-Throckmorton TX-Shackelford TX-
700 PM CDT Tue Mar 17 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN HASKELL...NORTHERN
SHACKELFORD AND THROCKMORTON COUNTIES UNTIL 745 PM CDT...

At 700 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles east of Millers Creek Reservoir to 6
miles southeast of Lake Stamford Marina. Movement was east at 25 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
these storms.

Strong thunderstorms will be near...
  Fort Griffin around 745 PM CDT.

Other locations impacted by these storms include The Intersection Of
Us-183 And Us-283, Us-183 Near The Throckmorton-
Baylor County Line, The Intersection Of Us-
283 And Ranch Road 209, Lusk and The Intersection Of Us-
380 And Highway 222.

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

LAT...LON 3308 9895 3295 9901 3296 9909 3291 9910
      3289 9961 3290 9962 3296 9962 3296 9963
      3340 9935 3339 9895
TIME...MOT...LOC 0000Z 263DEG 21KT 3342 9928 3296 9956

Daniels

Special weather statement, Mar 17, 7:26 PM CDT, 23 minutes before

Special Weather Statement
National Weather Service San Angelo TX
726 PM CDT Tue Mar 17 2020

TXZ076-180115-
Crockett TX-
726 PM CDT Tue Mar 17 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL CROCKETT COUNTY
UNTIL 815 PM CDT...

At 725 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Sheffield, moving northeast at 25 mph.

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

This storm will remain over mainly rural areas of north central
Crockett County, including the following locations... I-10 Near The
Crockett-Pecos County Line.

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.

&&

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

LAT...LON 3108 10164 3108 10162 3078 10139 3070 10181
      3075 10182 3076 10184 3081 10183 3082 10185
      3086 10185 3089 10189
TIME...MOT...LOC 0025Z 237DEG 25KT 3079 10184

PO

Special weather statement, Mar 17, 7:26 PM CDT, 23 minutes before

Special Weather Statement
National Weather Service San Angelo TX
726 PM CDT Tue Mar 17 2020

TXZ049-054-098-113-127-180130-
Haskell TX-Fisher TX-Nolan TX-Jones TX-Taylor TX-
726 PM CDT Tue Mar 17 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN HASKELL...JONES...
NORTHEASTERN NOLAN...SOUTHEASTERN FISHER AND NORTHWESTERN TAYLOR
COUNTIES UNTIL 830 PM CDT...

At 726 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles northeast of Hamlin to near Sweetwater.
Movement was east at 25 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Strong thunderstorms will be near...
  Hamlin around 730 PM CDT.
  Trent around 810 PM CDT.
  Paint Creek around 820 PM CDT.
  Merkel around 825 PM CDT.
  Stamford, Tye, Lake Stamford Marina and Dyess Afb around 830 PM
  CDT.

Other locations impacted by these storms include Funston, Hodges, The
Intersection Of Us-
180 And Ranch Road 126, Tuxedo, Camp Butman, Stith, Truby, Lake
Sweetwater, The Intersection Of Us-
180 And Farm Road 600 and Camp Boothe Oaks.

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

LAT...LON 3312 9948 3296 9957 3296 9962 3288 9961
      3230 9991 3234 10052 3296 10012 3296 9999
      3304 9998
TIME...MOT...LOC 0026Z 265DEG 20KT 3297 10004 3241 10041

Daniels

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 7:00 PM CDT	Special Weather Statement	SJT	Throckmorton	45 min
Mar 17, 7:02 PM CDT	Areal Flood Advisory	SJT	Haskell, Throckmorton	3 hr
Mar 17, 7:10 PM CDT	Areal Flood Advisory	SJT	Fisher, Jones, Nolan	3 hr
Mar 17, 7:26 PM CDT	Special Weather Statement	SJT	Crockett	49 min
Mar 17, 7:43 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	19 min
Mar 17, 8:38 PM CDT	Tornado Warning	SJT	Shackelford, Throckmorton	37 min
Mar 17, 9:16 PM CDT	Special Weather Statement	SJT	Shackelford	14 min
Mar 17, 10:15 PM CDT	Special Weather Statement	SJT	Irion	45 min
Mar 17, 10:54 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Sterling, Tom Green	51 min
Mar 17, 11:33 PM CDT	Special Weather Statement	SJT	Taylor	42 min
Mar 18, 12:33 AM CDT	Special Weather Statement	SJT	Runnels	42 min
Mar 18, 2:44 AM CDT	Special Weather Statement	SJT	Brown	46 min
Mar 18, 5:04 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman, Runnels, Taylor	41 min
Mar 18, 5:25 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Sterling, Tom Green	28 min
Mar 18, 5:33 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Jones, Shackelford, Taylor	42 min
Mar 18, 5:38 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman	52 min
Mar 18, 5:48 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford	57 min
Mar 18, 6:10 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford, Throckmorton	65 min
Mar 18, 6:57 PM CDT	Areal Flood Advisory	SJT	Haskell, Jones, Shackelford, Throckmorton	108 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020 Every 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.