Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 34, NWS San Angelo, TX

April 11, 2020Haskell County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 11, 2020, 3:30 PM CDT for Haskell County, Texas. It was in force for 60 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 11, 2020, 3:30 PM CDT (20:30 UTC)
Expired: Apr 11, 2020, 4:30 PM CDT
In force: 60 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Tornado: Possible
Hail: 2.0 in
Wind: 60.0 mph

County Haskell County, TX

The radar

The Dyess AFB radar (KDYX), 84 km from the middle of the area, began a volume at 20:31 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
Apr 11, 2:02 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.5 hours before the alert went out and 231 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 976 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 271 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Apr 11, 3:28 PM CDT, 2 minutes earlier.

Area forecast discussion, Apr 11, 3:28 PM CDT, 2 minutes before

Area Forecast Discussion
National Weather Service San Angelo TX
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 	 56  77  35  54 /  60   0   0   0
San Angelo 	 55  80  38  61 /  50   0   0   0
Junction 	 57  79  40  63 /  80   0   0   0
Brownwood 	 58  77  36  57 /  80   5   0   0
Sweetwater 	 54  77  35  54 /  50   0   0   0
Ozona      	 54  80  40  64 /  50   0   0   0

&&

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

Hazardous weather outlook, Apr 11, 2:48 PM CDT, 42 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 11, 9:52 AM CDT, 5 hours 38 minutes before

Special Weather Statement
National Weather Service San Angelo TX
952 AM CDT Sat Apr 11 2020

TXZ099-114-111530-
Throckmorton TX-Shackelford TX-
952 AM CDT Sat Apr 11 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SHACKELFORD AND
SOUTHEASTERN THROCKMORTON COUNTIES UNTIL 1030 AM CDT...

At 951 AM CDT, Doppler radar was tracking a strong thunderstorm 4
miles north of Albany, moving east at 35 mph.

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

This strong thunderstorm will be near...
  Fort Griffin around 1005 AM CDT.

Other locations impacted by this storm include Lusk.

LAT...LON 3311 9895 3296 9895 3295 9909 3281 9910
      3277 9934 3285 9942
TIME...MOT...LOC 1451Z 249DEG 31KT 3281 9930

mkd

Local storm report, Apr 11, 10:37 AM CDT, 4 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1037 AM CDT SAT APR 11 2020

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

1020 AM     TSTM WND GST     5 SE WOODSON            32.97N 98.99W
04/11/2020  E60 MPH          THROCKMORTON       TX   FIRE DEPT/RESCUE

            VFD ESTIMATED 60 MPH WIND GUSTS AND NICKEL SIZE HAIL.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 8:19 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	41 min
Apr 10, 8:55 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	65 min
Apr 10, 9:56 PM CDT	Severe Thunderstorm Warning	SJT	Crockett, Schleicher	44 min
Apr 10, 10:43 PM CDT	Special Weather Statement	SJT	Schleicher	47 min
Apr 11, 9:52 AM CDT	Special Weather Statement	SJT	Throckmorton	38 min
Apr 11, 10:00 AM CDT	Severe Thunderstorm Warning	SJT	Shackelford, Throckmorton	35 min
Apr 11, 4:07 PM CDT	Tornado Warning	SJT	Haskell	38 min
Apr 11, 4:32 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	58 min
Apr 11, 4:38 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	52 min
Apr 11, 5:04 PM CDT	Special Weather Statement	SJT	Tom Green	41 min
Apr 11, 5:21 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford	54 min
Apr 11, 5:32 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	43 min
Apr 11, 5:36 PM CDT	Special Weather Statement	SJT	Throckmorton	39 min
Apr 11, 5:54 PM CDT	Severe Thunderstorm Warning	SJT	Jones, Shackelford	66 min
Apr 11, 6:06 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Runnels, Tom Green	39 min
Apr 11, 6:18 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford, Throckmorton	57 min
Apr 11, 6:29 PM CDT	Tornado Warning	SJT	Shackelford	31 min
Apr 11, 6:45 PM CDT	Areal Flood Advisory	SJT	Tom Green	60 min
Apr 11, 6:49 PM CDT	Severe Thunderstorm Warning	SJT	Jones, Shackelford	56 min
Apr 11, 6:53 PM CDT	Special Weather Statement	SJT	Tom Green	37 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.