Alert archive / Texas / Special Weather Statements in 2016

Special Weather Statement, NWS Austin/San Antonio, TX

May 26, 2016Williamson County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at May 26, 2016, 11:37 PM CDT for Williamson County, Texas. It was in force for 53 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 26, 2016, 11:37 PM CDT (04:37 UTC)
Expired: May 27, 2016, 12:30 AM CDT
In force: 53 min
Issued by: NWS Austin/San Antonio, TX

County Williamson County, TX

The radar

The Ft Hood radar (KGRK), 47 km from the middle of the area, began a volume at 04:36 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 nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.6 hours before the alert went out and 262 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: 301 J/kg
Mixed-layer CIN: -307 J/kg
Mixed-layer LCL: 1278 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 26, 11:09 PM CDT, 28 minutes earlier.

Area forecast discussion, May 26, 11:09 PM CDT, 28 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Austin/San Antonio TX
1109 PM CDT THU MAY 26 2016

.UPDATE...
The forecast has been updated for the early cancellation of WW
#217 where thunderstorm activity has diminished over the last
couple hours. Farther east across the Hill Country, I-35 corridor
and into the Hwy. 77 corridor a new severe thunderstorms watch
(#221) is now in effect until 3 AM CDT. Rain chances have also
been raised significantly for areas generally along and north of
I-10. Complicated surface pattern in place with an outflow
boundary roughly along a Llano to LaGrange line, with stout
southerly flow in the low-levels to the south and southwest of
this boundary. In addition, lone cell over the western Hill
continues to remain severe while moving eastward. This will lead
to additional showers and storms for most areas north of I-10.

&&

.PREV DISCUSSION... /ISSUED 743 PM CDT THU MAY 26 2016/

UPDATE...
Please see the 00Z aviation forecast discussion below.

AVIATION...
Convection chances will be the main concern across the region
through the remainder of this evening. Based on radar trends, we
have gone with TEMPO groups for TSRA at KAUS and KDRT for the next
couple of hours. We will also include TEMPO groups for SAT/SSF
between 06Z-10Z as activity is expected to move in from the west.
Additional rainfall chances appear in the offing for our I-35
sites late tomorrow afternoon and we'll mention PROB30 groups to
cover.

PREV DISCUSSION... /ISSUED 318 PM CDT THU MAY 26 2016/

UPDATE...
In coordination with SPC, we have issued a Severe Thunderstorm
Watch along and northwest of a Junction to Uvalde to Del Rio line.
Showers and thunderstorms continued to develop over the Serranias
del Burro mountains to southwestern Texas. Strong instability and
shear are noted across our area.

PREV DISCUSSION... /ISSUED 232 PM CDT THU MAY 26 2016/

SHORT TERM (Tonight through Friday Night)...
Have issued a Flash Flood Watch for areas along and east of a
Burnet to Boerne to San Antonio to Karnes City line for this
afternoon through late tonight. A surface boundary from morning
rains over Central Texas is slowly drifting south along the I-35
corridor and provided lift to generate showers and thunderstorms.
PWS have risen to near 2 inches across the Hill Country and South
Central Texas tapering to near 1.5 inches along the Rio Grande.
Due to earlier clearing skies allowing convective temperatures to
be reached, showers and thunderstorms have developed out west from
the Serranias del Burro of Mexico across the Big Bend into
southwestern Texas. Expect showers and thunderstorms to continue
across the eastern areas with locally heavy rains causing some
flooding this afternoon into evening. Showers and thunderstorms
out west will organize and move east across our area this evening
into the overnight hours. This will cause another round of locally
heavy rains. With the rains ongoing in the east adding to the
saturated soils...the threat for flooding will continue into the
overnight hours especially across eastern areas. An upper level
trough will move northeast across the plains states on Wednesday
forcing a dryline into the Edwards Plateau and Rio Grande Plains
on Friday. Showers and thunderstorms will develop along and east
of the dryline. More locally heavy rains are possible with PWS
near 1.8 inches east of I-35. CAPEs of 2000 to 4000 j/kg and 0-6
km shear will allow for strong to severe storms this afternoon
through Friday evening.

LONG TERM (Saturday through Thursday)...
A series of upper level impulses will move across the southern
tier of states. A moist and unstable airmass lingers over our area
due to a persistent southeasterly lower flow off the Gulf of
Mexico. As a result, periods of showers and thunderstorms are
expected Saturday through Thursday. Similar to the short term, a
few strong to severe storms and locally heavy rains with flooding
are possible.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              73  85  73  90  73 /  90  60  40  30  20
Austin Bergstrom Intl Airport  73  85  72  89  72 / 100  60  40  30  20
New Braunfels Muni Airport     73  87  72  88  73 /  70  60  30  30  20
Burnet Muni Airport            71  85  71  88  71 /  70  60  30  30  20
Del Rio Intl Airport           72  95  71  90  73 /  50  10  10  40  30
Georgetown Muni Airport        72  84  72  89  71 /  70  60  40  30  20
Hondo Muni Airport             73  91  73  90  73 /  60  30  20  30  30
San Marcos Muni Airport        73  86  72  88  72 /  90  60  30  30  20
La Grange - Fayette Regional   75  85  75  88  73 /  90  70  40  30  10
San Antonio Intl Airport       74  87  74  88  73 /  60  40  20  30  20
Stinson Muni Airport           75  90  75  90  75 /  60  40  20  30  20

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch until 6 AM CDT Friday for the following counties:
Bastrop...Bexar...Blanco...Burnet...Caldwell...Comal...De Witt...
Fayette...Gonzales...Guadalupe...Hays...Karnes...Kendall...Lavaca...
Lee...Travis...Williamson...Wilson.

&&

Mesoscale/Aviation...LH
Synoptic/Grids...24
Public Service/Data Collection...Treadway

Hazardous weather outlook, May 26, 5:40 PM CDT, 5 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
540 PM CDT THU MAY 26 2016

TXZ171>173-183>194-202>209-217>225-228-272245-
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-
540 PM CDT THU MAY 26 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TONIGHT.

SEVERE STORMS WILL BE POSSIBLE ACROSS ALL OF SOUTH CENTRAL TEXAS
THIS EVENING AND TONIGHT. WHILE ALL AREAS COULD EXPERIENCE SEVERE
WEATHER...THE BEST CHANCE WILL BE MAINLY ALONG AND WEST OF A
GIDDINGS TO SEGUIN TO DILLEY LINE. LARGE HAIL WILL BE THE MAIN
RISK...BUT DAMAGING WINDS AND A BRIEF TORNADO CAN NOT BE RULED
OUT.

IN ADDITION...HEAVY RAINFALL MAY LEAD TO FLASH FLOODING. A
FLASH FLOOD WATCH IS IN EFFECT THROUGH TONIGHT FOR COUNTIES ALONG
AND EAST OF A BURNET TO BOERNE TO SAN ANTONIO TO KARNES CITY LINE.
RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE...WITH ISOLATED
AMOUNTS UP TO 6 INCHES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

ADDITIONAL SEVERE STORMS WILL BE POSSIBLE FRIDAY ACROSS MOST OF
SOUTH CENTRAL TEXAS...WITH THE MAIN AREA OF CONCERN ALONG AND
EAST OF U.S. HIGHWAY 281. THE MAIN THREATS WILL BE LARGE
HAIL...DAMAGING WINDS...AND ISOLATED TORNADOES.

LOCALLY HEAVY RAINS COULD RESULT IN FLOODING...ESPECIALLY IN AREAS
THAT HAVE RECEIVED RECENT SIGNIFICANT RAINFALL.

STRONG STORMS WILL REMAIN POSSIBLE THROUGH WEDNESDAY AS AN ACTIVE
PERIOD WEATHER PATTERN REMAINS INTACT ACROSS SOUTH-CENTRAL TEXAS.

.SPOTTER INFORMATION STATEMENT...

PLEASE REPORT ANY SEVERE WEATHER OR FLOODING TO THE NATIONAL
WEATHER SERVICE.

In the hours before

Local storm report, May 26, 11:01 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1101 PM CDT THU MAY 26 2016

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

1050 PM     HAIL             KERRVILLE               30.04N  99.14W
05/26/2016  E1.75 INCH       KERR               TX   PUBLIC

            GOLF BALL SIZED HAIL IN DOWNTOWN KERRVILLE. REPORT
            GATHER VIA TWITTER.

&&

EVENT NUMBER EWX1600442

Local storm report, May 26, 11:03 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1103 PM CDT THU MAY 26 2016

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

1056 PM     HAIL             2 ENE INGRAM            30.09N  99.20W
05/26/2016  E1.50 INCH       KERR               TX   AMATEUR RADIO

            HAM REPORTS PING PONG BALL SIZED HAIL AT THE KOA IN
            KERRVILLE.

&&

EVENT NUMBER EWX1600443

Local storm report, May 26, 11:07 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1107 PM CDT THU MAY 26 2016

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

1100 PM     HAIL             1 NNE KERRVILLE         30.05N  99.13W
05/26/2016  E1.75 INCH       KERR               TX   BROADCAST MEDIA

            MEDIA REPORTED GOLF BALL SIZED HAIL AT SCHREINER GOLF
            COURSE IN KERRVILLE

&&

EVENT NUMBER EWX1600444

Local storm report, May 26, 11:09 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1109 PM CDT THU MAY 26 2016

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

1100 PM     HAIL             1 SW AUSTIN BERGSTROM I 30.19N  97.68W
05/26/2016  E1.00 INCH       TRAVIS             TX   ASOS

            QUARTER SIZED HAIL REPORTED IN THE AUSTIN BERGSTROM
            KAUS ASOS OBSERVATION

&&

EVENT NUMBER EWX1600445

Local storm report, May 26, 11:15 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1115 PM CDT THU MAY 26 2016

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

1105 PM     FLASH FLOOD      3 S HILLS               30.15N  97.07W
05/26/2016                   BASTROP            TX   EMERGENCY MNGR

            200 BLOCK OF FM 2239 AND FM 2104 NEAR GRASSYVILLE ROAD
            IN PAIGE TEXAS FLOODED.

&&

EVENT NUMBER EWX1600446

Special weather statement, May 26, 11:37 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1137 PM CDT THU MAY 26 2016

TXZ172-173-190>192-270530-
WILLIAMSON TX-BURNET TX-TRAVIS TX-BLANCO TX-HAYS TX-
1137 PM CDT THU MAY 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BURNET...NORTHERN
TRAVIS...SOUTHWESTERN WILLIAMSON...NORTHEASTERN BLANCO AND
NORTHWESTERN HAYS COUNTIES UNTIL 1230 AM CDT...

AT 1137 PM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM NEAR MARBLE FALLS TO NEAR SPICEWOOD TO NEAR
HENLY. MOVEMENT WAS EAST AT 45 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
AUSTIN...ROUND ROCK...CEDAR PARK...GEORGETOWN...PFLUGERVILLE...MARBLE
FALLS...SERENADA...WINDEMERE...ANDERSON MILL...LEANDER...HUTTO...LAKEWAY...
LAGO VISTA...BEE CAVE...HORSESHOE BAY...WEST LAKE HILLS...THE HILLS...
MEADOWLAKES...ROLLINGWOOD AND LIBERTY HILL.

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.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FOR
SOUTH CENTRAL TEXAS.

LAT...LON 3075 9758 3049 9753 3027 9760 3023 9827
      3060 9833
TIME...MOT...LOC 0437Z 269DEG 40KT 3056 9823 3042 9817 3026 9821

MO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 7:00 PM CDT	Special Weather Statement	EWX	Fayette	30 min
May 26, 7:00 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	45 min
May 26, 7:23 PM CDT	Flash Flood Warning	EWX	Bastrop, Fayette, Lee	3 hr
May 26, 7:44 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Real, Val Verde	49 min
May 26, 8:27 PM CDT	Special Weather Statement	EWX	Fayette	33 min
May 26, 8:36 PM CDT	Special Weather Statement	EWX	Edwards	39 min
May 26, 8:48 PM CDT	Severe Thunderstorm Warning	EWX	Fayette, Lee	42 min
May 26, 9:05 PM CDT	Special Weather Statement	EWX	Kerr, Real	40 min
May 26, 9:07 PM CDT	Areal Flood Advisory	EWX	Hays, Travis	113 min
May 26, 9:21 PM CDT	Special Weather Statement	EWX	Travis	39 min
May 26, 9:23 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Gillespie, Kerr, Real	52 min
May 26, 9:30 PM CDT	Special Weather Statement	EWX	Fayette	30 min
May 26, 9:46 PM CDT	Special Weather Statement	EWX	Travis	44 min
May 26, 10:06 PM CDT	Flash Flood Warning	EWX	Hays, Travis	3 hr
May 26, 10:06 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Hays, Travis	39 min
May 26, 10:10 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kendall, Kerr, Llano	65 min
May 26, 10:16 PM CDT	Flash Flood Warning	EWX	Bastrop, Fayette, Lee	3 hr
May 26, 10:43 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Travis	47 min
May 26, 10:53 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Gillespie, Kendall, Kerr, Llano	52 min
May 26, 11:15 PM CDT	Areal Flood Advisory	EWX	Blanco, Gillespie, Kendall, Kerr	3 hr
May 26, 11:26 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Travis	49 min
May 26, 11:28 PM CDT	River Flood Warning	EWX	Travis	20 hr
May 26, 11:51 PM CDT	Special Weather Statement	EWX	Blanco	54 min
May 27, 12:03 AM CDT	Flash Flood Warning	EWX	Blanco, Gillespie, Kendall, Kerr	4 hr
May 27, 12:03 AM CDT	Severe Thunderstorm Warning	EWX	Blanco, Gillespie, Kendall	57 min
May 27, 12:10 AM CDT	River Flood Warning	EWX	Fayette	69 hr
May 27, 12:11 AM CDT	Special Weather Statement	EWX	Williamson	49 min
May 27, 12:19 AM CDT	River Flood Warning	EWX	Bastrop	32 hr
May 27, 12:21 AM CDT	Areal Flood Advisory	EWX	Hays, Travis, Williamson	54 min
May 27, 12:43 AM CDT	Special Weather Statement	EWX	Bastrop	47 min
May 27, 12:47 AM CDT	Tornado Warning	EWX	Bastrop	28 min
May 27, 1:00 AM CDT	Flash Flood Warning	EWX	Hays, Travis, Williamson	3 hr
May 27, 1:03 AM CDT	Special Weather Statement	EWX	Blanco	42 min
May 27, 1:13 AM CDT	Flash Flood Warning	EWX	Bastrop, Caldwell, Fayette, Lee	15 hr
May 27, 1:46 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee	59 min
May 27, 1:52 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Fayette, Gonzales	53 min
May 27, 1:58 AM CDT	River Flood Warning	EWX	Bastrop, Fayette	54 hr
May 27, 2:42 AM CDT	Severe Thunderstorm Warning	EWX	Fayette	63 min
May 27, 3:28 AM CDT	Flash Flood Warning	EWX	Hays, Travis	11 hr
May 27, 4:34 PM CDT	Special Weather Statement	EWX	Lavaca	56 min
May 27, 4:50 PM CDT	Areal Flood Advisory	EWX	Lavaca	3 hr
May 27, 5:27 PM CDT	Special Weather Statement	EWX	Lavaca	63 min
May 27, 5:37 PM CDT	Flash Flood Warning	EWX	Lavaca	3 hr
May 27, 5:46 PM CDT	Special Weather Statement	EWX	DeWitt	44 min
May 27, 6:08 PM CDT	Areal Flood Advisory	EWX	DeWitt	2 hr
May 27, 6:46 PM CDT	Special Weather Statement	EWX	DeWitt	44 min

Nearby

Special Weather Statements in Texas, 2016 Every special weather statement in 2016

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.