Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 117, NWS Austin/San Antonio, TX

May 16, 2020DeWitt County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 16, 2020, 12:56 AM CDT for DeWitt County, Lavaca County, Texas. It was in force for 46 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: May 16, 2020, 12:56 AM CDT (05:56 UTC)
Expired: May 16, 2020, 1:42 AM CDT
In force: 46 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties DeWitt County, TX, Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 100 km from the middle of the area, began a volume at 05:58 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 15, 9:14 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.9 hours before the alert went out and 168 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: 3374 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 744 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.5

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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 16, 12:52 AM CDT, 4 minutes earlier.

Area forecast discussion, May 16, 12:52 AM CDT, 4 minutes before

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Hazardous weather outlook, May 15, 1:16 PM CDT, 11 hours 40 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
116 PM CDT Fri May 15 2020

TXZ171>173-183>194-202>209-217>225-228-161830-
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde-
Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala-
Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit-
116 PM CDT Fri May 15 2020

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...This Afternoon And Tonight.

 There is an enhanced risk for severe storms this afternoon
through late tonight across much of South Central Texas. The
greatest threat for large hail will be across the Rio Grande
Plains and Western Hill Country. Damaging wind threat is in place
for all of South Central Texas. In addition to the severe risk,
there is a chance for locally heavy rainfall and flash flooding. 1
to 3 inches of rainfall is possible with isolated amounts up to 5
inches which could lead to flash flooding impacts.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Local storm report, May 15, 11:49 PM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1149 PM CDT FRI MAY 15 2020

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

1139 PM     HAIL             3 WSW SANDY OAKS        29.17N 98.46W
05/15/2020  E1.25 INCH       BEXAR              TX   TRAINED SPOTTER

&&

NH

Local storm report, May 15, 11:50 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1150 PM CDT FRI MAY 15 2020

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

1126 PM     TSTM WND DMG     6 WSW SANDY OAKS        29.16N 98.50W
05/15/2020                   BEXAR              TX   TRAINED SPOTTER

            2 FOOT DIAMETER TREES WERE BLOWN DOWN OVER
            ROADS.

&&

NH

Local storm report, May 15, 11:51 PM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1151 PM CDT FRI MAY 15 2020

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

1136 PM     HAIL             2 NE MARION             29.60N 98.12W
05/15/2020  U0.50 INCH       GUADALUPE          TX   PUBLIC

            REPORT FROM MPING: HALF-INCH (0.50 IN.).

&&

NH

Special weather statement, May 16, 12:08 AM CDT, 48 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
1208 AM CDT Sat May 16 2020

TXZ173-191>194-207>209-221-223-160600-
Guadalupe TX-Caldwell TX-Bastrop TX-Williamson TX-Fayette TX-
Gonzales TX-Hays TX-Wilson TX-Lee TX-Travis TX-
1208 AM CDT Sat May 16 2020

...SIGNIFICANT WEATHER ADVISORY FOR WILLIAMSON...CALDWELL...
SOUTHEASTERN HAYS...GUADALUPE...TRAVIS...BASTROP...GONZALES...
NORTHWESTERN LEE...SOUTHWESTERN FAYETTE AND NORTHEASTERN WILSON
COUNTIES UNTIL 100 AM CDT...

At 1207 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Salado to 8 miles northeast of Lockhart to
7 miles south of Kingsbury to Stockdale. Movement was east at 25 mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Austin, Round Rock, Cedar Park, Georgetown, San Marcos, Pflugerville,
Kyle, Seguin, Taylor, Buda, Lockhart, Elgin, Bastrop, Gonzales,
Luling, Smithville, Stockdale, Granger, Serenada and Anderson Mill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central Texas.

LAT...LON 3087 9763 3074 9727 3047 9716 3050 9707
      2988 9710 2928 9738 2920 9749 2927 9820
      2963 9799 3002 9788 3090 9780
TIME...MOT...LOC 0507Z 276DEG 22KT 3089 9758 2996 9758 2955 9779 2924
9799

CP

Local storm report, May 16, 12:27 AM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1227 AM CDT SAT MAY 16 2020

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

1226 AM     TSTM WND GST     1 NW KENEDY             28.83N 97.87W
05/16/2020  M59 MPH          KARNES             TX   PUBLIC

            MEASURED AT K2R9.

&&

NH

Special weather statement, May 16, 12:45 AM CDT, 11 minutes before

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The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 15, 7:23 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	52 min
May 15, 7:25 PM CDT	Special Weather Statement	EWX	Bastrop	35 min
May 15, 7:51 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real	54 min
May 15, 7:56 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick	64 min
May 15, 8:04 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick, Uvalde, Zavala	56 min
May 15, 8:05 PM CDT	Special Weather Statement	EWX	Travis	25 min
May 15, 8:06 PM CDT	Special Weather Statement	EWX	Comal	24 min
May 15, 8:13 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kerr, Real, Uvalde	62 min
May 15, 8:27 PM CDT	Areal Flood Advisory	EWX	Bastrop, Travis	3 hr
May 15, 8:32 PM CDT	Special Weather Statement	EWX	Travis	43 min
May 15, 8:33 PM CDT	Special Weather Statement	EWX	Blanco	42 min
May 15, 8:53 PM CDT	Special Weather Statement	EWX	Blanco	52 min
May 15, 8:56 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina, Uvalde, Zavala	64 min
May 15, 8:58 PM CDT	Areal Flood Advisory	EWX	Blanco, Comal, Hays, Kendall	4 hr
May 15, 9:04 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick, Zavala	56 min
May 15, 9:09 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Kendall	66 min
May 15, 9:12 PM CDT	Tornado Warning	EWX	Zavala	18 min
May 15, 9:21 PM CDT	Areal Flood Advisory	EWX	Bandera, Kerr, Real	114 min
May 15, 9:29 PM CDT	Special Weather Statement	EWX	Travis	46 min
May 15, 9:32 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Kendall, Kerr	36 min
May 15, 9:34 PM CDT	Areal Flood Advisory	EWX	Travis	116 min
May 15, 9:45 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Travis	3 hr
May 15, 9:54 PM CDT	Areal Flood Advisory	EWX	Bandera, Blanco, Gillespie, Kendall, Kerr	3 hr
May 15, 9:54 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Frio, Medina, Zavala	66 min
May 15, 9:57 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Zavala	63 min
May 15, 9:59 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kendall	14 min
May 15, 10:00 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick	60 min
May 15, 10:13 PM CDT	Areal Flood Advisory	EWX	Zavala	2 hr
May 15, 10:31 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Blanco, Burnet, Comal, Guadalupe, Hays and 5 more	59 min
May 15, 10:39 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Kendall	3 hr
May 15, 10:53 PM CDT	Areal Flood Advisory	EWX	Bandera, Bexar, Comal, Guadalupe, Medina	3 hr
May 15, 10:55 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Frio, Karnes, Medina, Wilson	65 min
May 15, 10:56 PM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Llano	3 hr
May 15, 10:58 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit	16 min
May 15, 11:28 PM CDT	Special Weather Statement	EWX	Bastrop, Caldwell, Guadalupe, Hays, Travis, Williamson	47 min
May 15, 11:31 PM CDT	Areal Flood Advisory	EWX	Atascosa, Frio	3 hr
May 15, 11:34 PM CDT	Areal Flood Advisory	EWX	Hays, Travis, Williamson	3 hr
May 15, 11:54 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, DeWitt, Gonzales, Karnes, Wilson	66 min
May 16, 12:08 AM CDT	Special Weather Statement	EWX	Bastrop, Caldwell, Gonzales, Guadalupe, Travis, Williamson	52 min
May 16, 12:27 AM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Lavaca	63 min
May 16, 12:29 AM CDT	Areal Flood Advisory	EWX	Caldwell, DeWitt, Gonzales, Guadalupe, Karnes, Lavaca and 1 more	3 hr
May 16, 12:45 AM CDT	Special Weather Statement	EWX	Williamson	30 min
May 16, 1:00 AM CDT	Areal Flood Advisory	EWX	Bastrop, Fayette, Lee	3 hr
May 16, 1:25 AM CDT	Special Weather Statement	EWX	Lavaca	50 min
May 16, 2:57 AM CDT	Areal Flood Advisory	EWX	Travis	3 hr

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.