Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 175, NWS Austin/San Antonio, TX

May 27, 20204 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 27, 2020, 8:45 PM CDT for 4 counties in Texas. It was in force for 45 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 27, 2020, 8:45 PM CDT (01:45 UTC)
Expired: May 27, 2020, 9:30 PM CDT
In force: 45 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bandera County, TX, Edwards County, TX, Kerr County, TX, Real County, TX

The radar

The Laughlin AFB radar (KDFX), 112 km from the middle of the area, began a volume at 01:46 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 27, 5:23 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.8 hours before the alert went out and 148 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: 937 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 2863 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.1

Open this sounding in Storm Lab

The text

As transmitted.

770 
WUUS54 KEWX 280145
SVREWX
TXC019-137-265-385-280230-
/O.NEW.KEWX.SV.W.0175.200528T0145Z-200528T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
845 PM CDT Wed May 27 2020

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Bandera County in south central Texas...
  Northwestern Kerr County in south central Texas...
  Northeastern Edwards County in south central Texas...
  Eastern Real County in south central Texas...

* Until 930 PM CDT.

* At 845 PM CDT, severe thunderstorms were located along a line
  extending from 10 miles south of Segovia to 17 miles northeast of
  Vance, moving southeast at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Vanderpool, Mountain Home, Lost Maples State Natural Area, Kerr
  Wildlife Management Area, Us-83 Near The Kerr-
  Kimble County Line, I-10 Near The Kimble-
  Kerr County Line, The Intersection Of I-10 And Us 290, Us-
  377 Near The Kimble-Edwards County Line and Prade Ranch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3029 9931 3013 9930 3013 9947 2975 9930
      2963 9948 2963 9966 3029 10014
TIME...MOT...LOC 0145Z 321DEG 26KT 3027 9963 3002 9984 

HAIL...1.00IN
WIND...60MPH
 
$$

RUNYEN

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 27, 7:04 PM CDT, 1 hour 41 minutes earlier.

Area forecast discussion, May 27, 7:04 PM CDT, 1 hour 41 minutes before

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
704 PM CDT Wed May 27 2020

.UPDATE... /UPDATED FORECAST TO REFLECT NEW WATCH/
Some PoPs were increased along the I-10 corridor to account for the
latest severe thunderstorm watch.

&&

.AVIATION.../00Z TAFS/
Severe storm outbreak underway and looks to impact AUS as early as
0030Z and the SAT/SSF areas by 03Z. A lead storm moving south from
Fredericksburg may lead to a faster onset into San Antonio if the
recent severity trends continue. Will hold off any severe parameters
until about an hour lead time if necessary. Later tonight a period of
VFR skies should be followed by a return of MVFR cigs at all site
around daybreak. Confidence is not very high on this expected cloud
deck, given a light wind forecast and NW flow aloft.

&&

.PREV DISCUSSION... /ISSUED 227 PM CDT Wed May 27 2020/

SHORT TERM (Tonight through Thursday Night)...
Today brings yet another round for thunderstorms this afternoon and
evening for some. A cut off deepening low located on the eastern
border of Oklahoma today will leave the area under broad
northwesterly flow aloft. Low level flow becomes more southeasterly
over the next few hours further increasing deep layer shear, values
over 65kt, supporting healthy updrafts over an already unstable
environment. CAPE values across our northeastern counties range from
2500-3500J/kg with weak CIN. Ongoing severe storms to our north have
shown that any initiation will happen relatively quickly. The Storm
Prediction Center has the area under an enhanced risk northeast of a
line from Kerrville to New Braunfels to Schulenburg. This risk
includes very large hail, damaging winds in excess of 70mph and a
small risk for tornadoes. There is expected to be multiple rounds of
storms for this area, the first being triggered by an active outflow
boundary from storms to our north. Later this evening, individual
discrete cells pose a threat for very large hail up to 3 inches, as
lapse rates are quite steep, upwards of 7.5C/km. Tornadoes are
possible, though the threat is lower due to the weak low level shear,
and relatively dry boundary layer. As the evening progresses and
cells congeal, the threat becomes more focused on damaging wind up to
70mph.

Considering the wet pattern that this area has been over the past
several days, the threat of flash flooding should not be overlooked
through the chatter of severe weather. Austin in particular has had
measurable precip everyday for the past 6 days, totaling over 2
inches. If cells begin to train, or MCS slows over the metro area, or
any area for that matter, flash flooding may occur. WPC has
highlighted the northeastern counties in a marginal threat for
excessive rainfall. This means, that the highlighted area has a 5-10
percent chance of rainfall exceeding the flash flood guidance within
25 miles of a point. Stay weather aware, and Turn Around Don't
Drown.

Tomorrow should be relatively quiet with residual showers in the
coastal plains during the morning and early afternoon. Highs will be
slightly cooler than today, reaching the mid to upper 80s. By
tomorrow night, rain chances shift back out west with higher POPs
over the Rio Grande Plains. The entire region is under a marginal
risk for severe storms.

LONG TERM (Friday through Wednesday)...
After an extended period of active weather, mid to upper level
ridging builds in by Friday and will continue through the weekend and
into next week. While a few isolated locations could see a stray
shower or thunderstorm during this period, by and large the region
should stay dry. Temperatures Friday through Monday will track
closely to seasonal normals with temperatures increasing a couple
degrees for Tuesday and Wednesday of next week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              65  85  67  87  65 /  80  20  10  -    0
Austin Bergstrom Intl Airport  63  84  66  87  65 /  80  30  10  -    0
New Braunfels Muni Airport     66  85  67  88  65 /  70  20  10  -    0
Burnet Muni Airport            64  83  64  84  62 /  80  10  10  -    0
Del Rio Intl Airport           71  91  70  92  68 /  -   10  40  10   0
Georgetown Muni Airport        64  83  66  86  63 /  90  20  10  -    0
Hondo Muni Airport             68  89  68  92  65 /  20  10  30  10   0
San Marcos Muni Airport        64  84  66  88  64 /  80  20  10  -    0
La Grange - Fayette Regional   66  84  67  87  66 /  60  30  10  10  -
San Antonio Intl Airport       68  87  69  90  67 /  50  10  20  10   0
Stinson Muni Airport           70  89  70  90  67 /  40  10  20  10   0

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&

Short-Term/Aviation...Oaks
Long-Term...Oaks
Decision Support...Treadway

Hazardous weather outlook, May 27, 4:53 AM CDT, 15 hours 52 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
453 AM CDT Wed May 27 2020

TXZ171>173-183>194-202>209-217>225-228-281000-
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-
453 AM CDT Wed May 27 2020

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

.DAY ONE...Today And Tonight.

Scattered severe thunderstorms are possible this afternoon and
evening for the eastern two-thirds of the area, primarily for
locations along and east of a Juno to Uvalde to Pearsall
line. An Enhanced Risk For Severe Thunderstorms exists along and
east of Kerrville to New Braunfels to Schulenburg line. Very
large hail, significant damaging wind gusts, and an isolated
tornado or two will all be possible. Locally heavy rainfall and
flash flooding is also possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather expected for the extended forecast period at
this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and evening.

In the hours before

Local storm report, May 27, 8:26 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
826 PM CDT WED MAY 27 2020

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

0824 PM     HAIL             1 NNW CAMP VERDE        29.91N 99.11W
05/27/2020  E1.00 INCH       KERR               TX   PUBLIC

&&

HAMPSHIRE

Local storm report, May 27, 8:32 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
832 PM CDT WED MAY 27 2020

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

0817 PM     HAIL             3 E MOUNTAIN HOME       30.18N 99.33W
05/27/2020  U1.00 INCH       KERR               TX   PUBLIC

            REPORT FROM MPING: QUARTER (1.00 IN.).

&&

HAMPSHIRE

Local storm report, May 27, 8:36 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
836 PM CDT WED MAY 27 2020

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

0832 PM     HAIL             LOCKHART                29.89N 97.67W
05/27/2020  E1.50 INCH       CALDWELL           TX   PUBLIC

&&

HAMPSHIRE

Local storm report, May 27, 8:38 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
838 PM CDT WED MAY 27 2020

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

0833 PM     HAIL             4 S LOCKHART            29.82N 97.67W
05/27/2020  E1.00 INCH       CALDWELL           TX   PUBLIC

            EM REPORTED QUARTER HAIL AT US183 AND
            WESTWOOD.

&&

HAMPSHIRE

Local storm report, May 27, 8:44 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
844 PM CDT WED MAY 27 2020

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

0842 PM     HAIL             BANDERA                 29.73N 99.07W
05/27/2020  E1.75 INCH       BANDERA            TX   PUBLIC

&&

HAMPSHIRE

Local storm report, May 27, 8:45 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
845 PM CDT WED MAY 27 2020

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

0844 PM     HAIL             2 NE SHAVANO PARK       29.61N 98.53W
05/27/2020  E1.50 INCH       BEXAR              TX   PUBLIC

&&

HAMPSHIRE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:01 PM CDT	Tornado Warning	EWX	Gillespie, Kendall, Kerr	29 min
May 27, 7:16 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Gillespie	3 hr
May 27, 7:26 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Kendall	49 min
May 27, 7:30 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kerr	45 min
May 27, 7:36 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	54 min
May 27, 7:40 PM CDT	Special Weather Statement	EWX	Bastrop, Travis	50 min
May 27, 8:04 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Travis	56 min
May 27, 8:04 PM CDT	Tornado Warning	EWX	Bandera, Kendall, Kerr	26 min
May 27, 8:10 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Hays, Travis	50 min
May 27, 8:12 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe, Kendall	63 min
May 27, 8:29 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Kendall, Kerr, Medina	61 min
May 27, 8:43 PM CDT	Areal Flood Advisory	EWX	Gillespie, Kerr	3 hr
May 27, 8:56 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, DeWitt, Fayette, Gonzales, Lavaca	64 min
May 27, 9:05 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Wilson	55 min
May 27, 9:16 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Medina	44 min
May 27, 9:21 PM CDT	Areal Flood Advisory	EWX	Bandera, Bexar, Medina	3 hr
May 27, 9:27 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina	48 min
May 27, 9:30 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr, Medina, Real, Uvalde	45 min
May 27, 9:51 PM CDT	Special Weather Statement	EWX	Lavaca	39 min
May 27, 9:56 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Fayette, Gonzales, Lavaca	7 min
May 27, 9:57 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Karnes, Wilson	63 min
May 27, 10:03 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Lavaca	25 min
May 27, 10:09 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina, Uvalde	66 min
May 27, 10:15 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kerr, Real	60 min
May 27, 10:47 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Gillespie	3 hr
May 27, 10:56 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Karnes	32 min
May 27, 11:06 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Real, Uvalde	54 min
May 27, 11:10 PM CDT	Severe Thunderstorm Warning	EWX	Frio	52 min
May 27, 11:14 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real	61 min
May 27, 11:38 PM CDT	Areal Flood Advisory	EWX	Bandera, Edwards, Real	3 hr
May 27, 11:38 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	56 min
May 27, 11:56 PM CDT	Severe Thunderstorm Warning	EWX	Real, Uvalde	64 min
May 28, 12:14 AM CDT	Severe Thunderstorm Warning	EWX	Real, Uvalde	61 min
May 28, 12:19 AM CDT	Special Weather Statement	EWX	Lee	41 min
May 28, 12:36 AM CDT	Special Weather Statement	EWX	Williamson	39 min
May 28, 1:03 AM CDT	Severe Thunderstorm Warning	EWX	Uvalde	57 min
May 28, 1:57 AM CDT	Severe Thunderstorm Warning	EWX	Uvalde, Zavala	25 min
May 28, 2:15 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kendall, Kerr	45 min
May 28, 2:37 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kendall, Kerr	38 min
May 28, 2:56 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Gillespie, Kerr, Real	64 min
May 28, 3:12 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Gillespie, Kerr	5 hr
May 28, 3:12 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kerr	48 min
May 28, 3:36 PM CDT	Tornado Warning	EWX	Bandera, Kerr	39 min
May 28, 3:41 PM CDT	River Flood Warning	EWX	Gillespie	19 hr
May 28, 3:41 PM CDT	River Flood Warning	EWX	Blanco	32 hr
May 28, 3:54 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr	31 min
May 28, 4:12 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr, Medina	18 min
May 28, 4:22 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Real, Uvalde	53 min
May 28, 4:27 PM CDT	Special Weather Statement	EWX	Val Verde	33 min
May 28, 4:28 PM CDT	Severe Thunderstorm Warning	EWX	Real, Uvalde	21 min
May 28, 4:31 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Gillespie	4 hr
May 28, 4:42 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	24 min
May 28, 4:46 PM CDT	Special Weather Statement	EWX	Medina	59 min
May 28, 5:05 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Uvalde, Val Verde	55 min
May 28, 5:17 PM CDT	Special Weather Statement	EWX	Bexar, Wilson	58 min
May 28, 5:18 PM CDT	Special Weather Statement	EWX	Val Verde	27 min
May 28, 5:25 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	21 min
May 28, 5:27 PM CDT	Special Weather Statement	EWX	Kinney	48 min
May 28, 5:38 PM CDT	Severe Thunderstorm Warning	EWX	Bexar	27 min
May 28, 5:46 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick	59 min
May 28, 5:55 PM CDT	Special Weather Statement	EWX	Kinney	50 min
May 28, 6:02 PM CDT	Special Weather Statement	EWX	Zavala	43 min
May 28, 6:23 PM CDT	Special Weather Statement	EWX	Gonzales	67 min
May 28, 6:29 PM CDT	Special Weather Statement	EWX	Williamson	61 min
May 28, 6:45 PM CDT	Special Weather Statement	EWX	Kinney	45 min
May 28, 6:47 PM CDT	Special Weather Statement	EWX	Maverick	43 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.