Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 79, NWS San Angelo, TX

May 18, 2017Brown County, Callahan County, Coleman County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 18, 2017, 8:20 PM CDT for Brown County, Callahan County, Coleman County, Texas. It was in force for 40 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 18, 2017, 8:20 PM CDT (01:20 UTC)
Expired: May 18, 2017, 9:00 PM CDT
In force: 40 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Brown County, TX, Callahan County, TX, Coleman County, TX

The radar

The Dyess AFB radar (KDYX), 49 km from the middle of the area, began a volume at 01:19 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 18, 1:55 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.3 hours before the alert went out and 199 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: 1519 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1729 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 16.4

Open this sounding in Storm Lab

The text

As transmitted.

236 
WUUS54 KSJT 190120
SVRSJT
TXC049-059-083-190200-
/O.NEW.KSJT.SV.W.0079.170519T0120Z-170519T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Angelo TX
820 PM CDT THU MAY 18 2017

The National Weather Service in San Angelo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Callahan County in west central Texas...
  Northwestern Brown County in west central Texas...
  Northeastern Coleman County in west central Texas...

* Until 900 PM CDT

* At 820 PM CDT, a severe thunderstorm was located near Cross Plains,
  or 22 miles northeast of Coleman, moving east at 50 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* this severe thunderstorm will remain over mainly rural areas of
  southeastern Callahan...northwestern Brown and northeastern Coleman
  Counties, including the following locations: Us-283 Near The
  Coleman-Callahan County Line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A tornado watch remains in effect until 1000 PM CDT for west central
Texas.

LAT...LON 3208 9912 3196 9921 3199 9949 3225 9931
      3225 9912
TIME...MOT...LOC 0120Z 265DEG 43KT 3210 9922 

HAIL...1.25IN
WIND...60MPH
 
$$

Woodward

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 May 18, 6:57 PM CDT, 1 hour 23 minutes earlier.

Area forecast discussion, May 18, 6:57 PM CDT, 1 hour 23 minutes before

Area Forecast Discussion...UPDATED
National Weather Service San Angelo TX
657 PM CDT Thu May 18 2017

.AVIATION...
/00Z TAFS/

Scattered thunderstorms continue to develop this evening across
the area east of a Haskell to Ballinger line. While the
possibility of convective redevelopment cannot be ruled out
tonight, uncertainty in placement precludes an inclusion of
TSRA at our TAF sites at this time. Carrying VCTS at KABI and
KSJT until 02Z, and will closely monitor radar trends and update
if needed. VFR conditions are expected through early tonight. Low
cloud development/expansion to the north-northwest is expected
overnight with MVFR ceilings. Our southern terminals will be
affected shortly after 06Z, and KABI and KSJT should be affected
by 09Z. Low cloud cover should persist through Friday morning,
and ceilings should gradually climb above 3000 feet between 1 PM
and 3 PM Friday. Isolated to scattered thunderstorm development
will be possible after 3 PM Friday. South-southeast winds will
continue through the next 24 hours.

&&

.PREV DISCUSSION... /issued 341 PM CDT Thu May 18 2017/

SHORT TERM...
(Tonight and Friday)

A conditional forecast for severe weather tonight. Strong
instability was present with MUCAPES up to 4000 J/KG and 0-6KM shear
of 45 KTS. Afternoon storms have been to the north of West Central
Texas this afternoon...as surface convergence has been weak earlier
this afternoon. However low level convergence has significantly
increased from Sweetwater to Haskell...where isolated storms were
beginning to develop. If a storm does develop, it could become
severe very quickly with no cap in place. A tornado watch is in
effect for all but the southern tier of West Central Texas until 10
PM.

The better chance of storms may come in after midnight as the upper
low over Utah moves into N. New Mexico, with shortwave rounding it.
Could see some severe weather given the instability, but don't
expect an organized severe weather event.

Friday, the severe weather outlook day 2 again has a slight
risk/enhanced risk of severe thunderstorms as dryline will be along
San Angelo CWA western boundary...from IRAAN to Sweetwater and Roby.
Instabilities will still be high again, with a stronger upper
shortwave moving through in the afternoon...and severe storms
will again be possible along and east of the dryline.

LONG TERM...
(Friday night through next Thursday)

As another upper low moves out of the Central Rockies and over
the Southern Plains, a cold front will be pushed into West
Central Texas Friday night. From Friday night through Sunday
morning, the best chance of showers and thunderstorms will be over
our southeastern counties. Showers and thunderstorms will
generally be south of I-20 Sunday and Sunday night. Most of the
forecast area will have a chance of precipitation Monday through
Tuesday night as the next cold front pushes south through the
forecast area.

High pressure will build over the area on Wednesday bringing dry
weather to the forecast area. A return of southeast winds will
bring warmer temperatures with afternoon highs in the upper 80s
by Thursday.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene 	 69  84  60  76 /  40  50  60  40
San Angelo 	 70  87  64  78 /  40  40  60  60
Junction 	 71  85  67  81 /  30  40  40  60
Brownwood 	 70  83  65  76 /  40  40  70  60
Sweetwater 	 67  87  58  76 /  40  30  50  20
Ozona      	 69  88  64  79 /  30  40  40  60

&&

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

Hazardous weather outlook, May 18, 3:48 PM CDT, 4 hours 32 minutes before

Hazardous Weather Outlook
National Weather Service San Angelo TX
348 PM CDT Thu May 18 2017

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-192100-
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-
348 PM CDT Thu May 18 2017

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

Isolated to scattered thunderstorms to develop this afternoon and
evening across much of West Central Texas. Some storms will
become severe and significant severe weather is possible,
including very large hail, isolated tornadoes, damaging winds and
deadly lightning. The best potential for severe weather will be
along and north of a Mertzon to San Angelo to Brownwood line.

.DAY ONE...This Afternoon and Tonight

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

The risk for severe weather will continue Friday across the area.
The main hazards will be large hail and damaging winds.

Saturday and Sunday...strong to severe storms are possible,
mainly along the Interstate 10 corridor.

.SPOTTER INFORMATION STATEMENT...

Spotter activation has been activated this afternoon and will
likely be needed Friday afternoon.

In the hours before

Local storm report, May 18, 7:17 PM CDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
717 PM CDT THU MAY 18 2017

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

0716 PM     HAIL             CROSS PLAINS            32.13N  99.17W
05/18/2017  E1.75 INCH       CALLAHAN           TX   LAW ENFORCEMENT

&&

EVENT NUMBER SJT1700080

MKD

Local storm report, May 18, 7:19 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
719 PM CDT THU MAY 18 2017

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

0714 PM     FUNNEL CLOUD     CROSS CUT               32.03N  99.13W
05/18/2017                   BROWN              TX   TRAINED SPOTTER

            SPOTTER REPORT RELAYED TO S.O.

&&

EVENT NUMBER SJT1700081

MKD

Local storm report, May 18, 7:29 PM CDT, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
729 PM CDT THU MAY 18 2017

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

0727 PM     HAIL             CROSS CUT               32.03N  99.13W
05/18/2017  E1.00 INCH       BROWN              TX   AMATEUR RADIO

            QUARTER SIZE HAIL WAS REPORTED.

&&

EVENT NUMBER SJT1700082

19

Local storm report, May 18, 7:45 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
745 PM CDT THU MAY 18 2017

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

0739 PM     TSTM WND DMG     3 S CROSS CUT           31.99N  99.13W
05/18/2017                   BROWN              TX   TRAINED SPOTTER

            POWER LINES AND POWER POLES WERE BLOWN DOWN.

&&

EVENT NUMBER SJT1700083

19

Local storm report, May 18, 7:56 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SAN ANGELO TX
756 PM CDT THU MAY 18 2017

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

0739 PM     TSTM WND DMG     3 S CROSS CUT           31.99N  99.13W
05/18/2017                   BROWN              TX   TRAINED SPOTTER

            POWER LINES AND POWER POLES WERE BLOWN DOWN. LARGE
            TREES ALSO DOWN.

&&

CORRECTED REMARKS

EVENT NUMBER SJT1700083

19

Local storm report, May 18, 8:05 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
805 PM CDT THU MAY 18 2017

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

0804 PM     TORNADO          3 NW MAY                32.01N  98.96W
05/18/2017                   BROWN              TX   AMATEUR RADIO

            CONFIRMED REPORT OF A TORNADO ON THE GROUND.

&&

EVENT NUMBER SJT1700084

19

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 7:01 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Callahan, Coleman, Taylor	44 min
May 18, 7:21 PM CDT	Tornado Warning	SJT	Brown	39 min
May 18, 7:45 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman	45 min
May 18, 7:59 PM CDT	Tornado Warning	SJT	Brown	31 min
May 18, 8:15 PM CDT	Tornado Warning	SJT	Brown	45 min
May 18, 8:37 PM CDT	Tornado Warning Tornado observed	SJT	Brown	38 min
May 18, 8:51 PM CDT	Flash Flood Warning	SJT	Brown, Callahan, Coleman	5 hr
May 18, 9:11 PM CDT	Severe Thunderstorm Warning	SJT	Brown	34 min
May 18, 9:47 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Nolan, Runnels, Taylor	43 min
May 18, 9:47 PM CDT	Severe Thunderstorm Warning	SJT	Brown, San Saba	28 min
May 18, 10:29 PM CDT	Severe Thunderstorm Warning	SJT	Runnels, Taylor	46 min
May 18, 11:15 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Taylor	45 min
May 18, 11:34 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman, Taylor	41 min
May 19, 12:15 AM CDT	Severe Thunderstorm Warning	SJT	Brown, Callahan, Coleman	60 min
May 19, 12:21 AM CDT	Special Weather Statement	SJT	Callahan	54 min
May 19, 12:26 AM CDT	Severe Thunderstorm Warning	SJT	Callahan, Taylor	49 min
May 19, 1:18 AM CDT	Special Weather Statement	SJT	Callahan	57 min
May 19, 2:36 AM CDT	Special Weather Statement	SJT	Fisher	54 min
May 19, 2:57 AM CDT	Special Weather Statement	SJT	Nolan	63 min
May 19, 3:20 AM CDT	Severe Thunderstorm Warning	SJT	Nolan	55 min
May 19, 3:59 AM CDT	Special Weather Statement	SJT	Fisher	61 min
May 19, 4:11 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	49 min
May 19, 4:17 AM CDT	Areal Flood Advisory	SJT	Fisher, Nolan	118 min
May 19, 4:40 AM CDT	Flash Flood Warning	SJT	Nolan	3 hr
May 19, 4:58 AM CDT	Severe Thunderstorm Warning	SJT	Nolan, Taylor	62 min
May 19, 5:03 AM CDT	Special Weather Statement	SJT	Jones	57 min
May 19, 5:47 AM CDT	Special Weather Statement	SJT	Jones, Shackelford	58 min
May 19, 5:49 AM CDT	Severe Thunderstorm Warning	SJT	Callahan, Jones, Shackelford, Taylor	41 min
May 19, 6:16 AM CDT	Areal Flood Advisory	SJT	Jones, Taylor	119 min
May 19, 6:22 AM CDT	Special Weather Statement	SJT	Shackelford	53 min
May 19, 6:34 AM CDT	Severe Thunderstorm Warning	SJT	Shackelford	26 min
May 19, 6:48 AM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	42 min
May 19, 7:56 AM CDT	Special Weather Statement	SJT	Fisher	64 min
May 19, 8:04 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	41 min
May 19, 8:44 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones, Nolan, Taylor	46 min
May 19, 9:20 AM CDT	Areal Flood Advisory	SJT	Fisher, Jones, Nolan	3 hr
May 19, 9:29 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	46 min
May 19, 9:35 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	40 min
May 19, 9:40 AM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford	50 min
May 19, 10:13 AM CDT	Severe Thunderstorm Warning	SJT	Fisher	47 min
May 19, 10:21 AM CDT	Severe Thunderstorm Warning	SJT	Haskell, Shackelford, Throckmorton	39 min
May 19, 10:46 AM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	44 min
May 19, 11:29 AM CDT	Special Weather Statement	SJT	Haskell, Jones	46 min
May 19, 11:30 AM CDT	Areal Flood Warning	SJT	Fisher, Nolan	6 hr
May 19, 11:34 AM CDT	Special Weather Statement	SJT	Sterling	41 min
May 19, 11:54 AM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	51 min
May 19, 12:01 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Sterling, Tom Green	59 min
May 19, 12:31 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	44 min
May 19, 12:46 PM CDT	Special Weather Statement	SJT	Taylor	44 min
May 19, 12:54 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Jones, Taylor	51 min
May 19, 12:59 PM CDT	Special Weather Statement	SJT	Coke	31 min
May 19, 1:17 PM CDT	Tornado Warning Tornado observed	SJT	Jones, Taylor	28 min
May 19, 1:32 PM CDT	Special Weather Statement	SJT	Coke	28 min
May 19, 1:53 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Runnels	67 min
May 19, 2:56 PM CDT	Special Weather Statement	SJT	Tom Green	49 min
May 19, 3:01 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	44 min
May 19, 3:05 PM CDT	Severe Thunderstorm Warning	SJT	Coke, Runnels, Taylor	55 min
May 19, 3:24 PM CDT	Tornado Warning	SJT	Runnels, Taylor	36 min
May 19, 3:34 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	41 min
May 19, 3:45 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	45 min
May 19, 3:55 PM CDT	Severe Thunderstorm Warning	SJT	Runnels	50 min
May 19, 4:04 PM CDT	Tornado Warning Tornado observed	SJT	Runnels	26 min
May 19, 4:10 PM CDT	Special Weather Statement	SJT	Taylor	50 min
May 19, 4:30 PM CDT	Special Weather Statement	SJT	Runnels	45 min
May 19, 4:32 PM CDT	Tornado Warning	SJT	Callahan, Coleman, Runnels, Taylor	28 min
May 19, 4:40 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Runnels, Taylor	36 min
May 19, 4:47 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Runnels, Taylor	12 min
May 19, 4:51 PM CDT	Special Weather Statement	SJT	Fisher	39 min
May 19, 4:53 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	52 min
May 19, 4:57 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Runnels, Tom Green	48 min
May 19, 4:57 PM CDT	Tornado Warning	SJT	Callahan, Coleman, Runnels, Taylor	33 min
May 19, 5:02 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, Runnels	43 min
May 19, 5:07 PM CDT	Special Weather Statement	SJT	Taylor	38 min
May 19, 5:11 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, Concho, Runnels	49 min
May 19, 5:23 PM CDT	Tornado Warning	SJT	Coleman, Concho, Runnels	37 min
May 19, 5:25 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman	50 min
May 19, 5:34 PM CDT	Special Weather Statement	SJT	Haskell	41 min
May 19, 5:39 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Runnels, Tom Green	51 min
May 19, 5:40 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones	50 min
May 19, 5:58 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, Concho, Runnels	47 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

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.