Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS San Angelo, TX

May 17, 2021Sterling County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 17, 2021, 6:12 PM CDT for Sterling County, Texas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 17, 2021, 6:12 PM CDT (23:12 UTC)
Expired: May 17, 2021, 6:45 PM CDT
In force: 33 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Sterling County, TX

The radar

The San Angelo radar (KSJT), 84 km from the middle of the area, began a volume at 23:12 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
May 17, 3:04 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 11.2 hours before the alert went out and 117 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: 1892 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 750 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

As transmitted.

060 
WUUS54 KSJT 172312
SVRSJT
TXC431-172345-
/O.NEW.KSJT.SV.W.0099.210517T2312Z-210517T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Angelo TX
612 PM CDT Mon May 17 2021

The National Weather Service in San Angelo has issued a

* Severe Thunderstorm Warning for...
  Northeastern Sterling County in west central Texas...

* Until 645 PM CDT.

* At 610 PM CDT, a severe thunderstorm was located over mainly rural 
  areas of northeastern Sterling County, moving northeast at 30 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will remain over mainly rural areas of
  northeastern Sterling County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for west central
Texas.

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

&&

LAT...LON 3209 10106 3209 10082 3198 10082 3186 10088
      3195 10112
TIME...MOT...LOC 2310Z 202DEG 27KT 3200 10098 

HAIL...1.00IN
WIND...<50MPH
 
$$

KB

2 follow-up statements

695 
WWUS54 KSJT 172318
SVSSJT

Severe Weather Statement
National Weather Service San Angelo TX
618 PM CDT Mon May 17 2021

TXC431-172345-
/O.CON.KSJT.SV.W.0099.000000T0000Z-210517T2345Z/
Sterling TX-
618 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN STERLING COUNTY...

At 616 PM CDT, a severe thunderstorm was located over mainly rural 
areas of northeastern Sterling County, moving north at 30 mph. 

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of
northeastern Sterling County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for west central
Texas.

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

&&

LAT...LON 3209 10106 3209 10082 3198 10082 3191 10085
      3195 10112
TIME...MOT...LOC 2316Z 202DEG 27KT 3205 10096 

HAIL...1.00IN
WIND...<50MPH
 
$$

KB

943 
WWUS54 KSJT 172331
SVSSJT

Severe Weather Statement
National Weather Service San Angelo TX
631 PM CDT Mon May 17 2021

TXC431-172345-
/O.CON.KSJT.SV.W.0099.000000T0000Z-210517T2345Z/
Sterling TX-
631 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN STERLING COUNTY...

At 630 PM CDT, a severe thunderstorm was located over mainly rural 
areas of northeastern Sterling County, moving north at 30 mph. 

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of
northeastern Sterling County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for west central
Texas.

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

&&

LAT...LON 3209 10106 3209 10082 3198 10082 3198 10098
      3200 10110
TIME...MOT...LOC 2330Z 202DEG 27KT 3215 10091 

HAIL...1.00IN
WIND...<50MPH
 
$$

KB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 7:58 PM CDT	Special Weather Statement	SJT	Sterling	17 min
May 16, 8:33 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	42 min
May 16, 9:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	SJT	Fisher	48 min
May 16, 9:16 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	44 min
May 16, 10:03 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford	42 min
May 16, 10:29 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	36 min
May 16, 10:46 PM CDT	Tornado Warning	SJT	Haskell, Jones	44 min
May 17, 2:02 AM CDT	Severe Thunderstorm Warning	SJT	Fisher	45 min
May 17, 2:38 AM CDT	Special Weather Statement	SJT	Shackelford	52 min
May 17, 4:34 AM CDT	Special Weather Statement	SJT	Callahan	41 min
May 17, 6:28 AM CDT	Special Weather Statement	SJT	Runnels	47 min
May 17, 7:01 AM CDT	Areal Flood Advisory	SJT	Runnels	119 min
May 17, 7:19 AM CDT	Areal Flood Advisory	SJT	Callahan, Jones, Shackelford, Taylor	116 min
May 17, 8:22 AM CDT	Areal Flood Advisory	SJT	Brown, Callahan, Coleman, Runnels	113 min
May 17, 8:30 AM CDT	Special Weather Statement	SJT	Coleman	45 min
May 17, 9:37 AM CDT	Areal Flood Advisory	SJT	Brown, Coleman, McCulloch, San Saba	113 min
May 17, 10:17 AM CDT	Special Weather Statement	SJT	San Saba	43 min
May 17, 10:22 AM CDT	Special Weather Statement	SJT	San Saba	53 min
May 17, 10:50 AM CDT	Areal Flood Advisory	SJT	San Saba	115 min
May 17, 1:50 PM CDT	Flash Flood Watch	SJT	Brown, Callahan, Coke, Coleman, Concho, Fisher and 16 more	20 hr
May 17, 5:47 PM CDT	Special Weather Statement	SJT	Fisher	43 min
May 17, 5:59 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	61 min
May 17, 6:23 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	52 min
May 17, 6:45 PM CDT	Tornado Warning	SJT	Haskell	30 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.