Alert archive / Texas / Special Weather Statements in 2015

Special Weather Statement, NWS Austin/San Antonio, TX

May 18, 2015Gonzales County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at May 18, 2015, 5:27 AM CDT for Gonzales 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 18, 2015, 5:27 AM CDT (10:27 UTC)
Expired: May 18, 2015, 6:00 AM CDT
In force: 33 min
Issued by: NWS Austin/San Antonio, TX

County Gonzales County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 10.5 hours before the alert went out and 209 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: 3080 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 18, 3:53 AM CDT, 1 hour 34 minutes earlier.

Area forecast discussion, May 18, 3:53 AM CDT, 1 hour 34 minutes before

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Hazardous weather outlook, May 18, 4:10 AM CDT, 1 hour 17 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
410 AM CDT MON MAY 18 2015

TXZ171>173-183>194-202>209-217>225-228-191000-
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-
410 AM CDT MON MAY 18 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED TODAY INTO TONIGHT. LOCALLY
HEAVY RAINS WILL BE THE MAIN THREAT MOST AREAS. AN ISOLATED STRONG
STORM OR TWO IS POSSIBLE ACROSS THE EDWARDS PLATEAU AND RIO GRANDE
PLAINS THIS EVENING INTO OVERNIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

CHANCES OF THUNDERSTORMS CONTINUE TUESDAY THROUGH SUNDAY. LOCALLY
HEAVY RAINS AND STRONG STORMS ARE POSSIBLE...MAINLY WEDNESDAY
NIGHT INTO THURSDAY AND AGAIN SATURDAY INTO SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE OVER THE NEXT SEVERAL DAYS.

In the hours before

Special weather statement, May 18, 5:27 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
527 AM CDT MON MAY 18 2015

TXZ223-181100-
GONZALES TX-
527 AM CDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GONZALES COUNTY
UNTIL 600 AM CDT...

AT 526 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
GONZALES...MOVING NORTHEAST AT 25 MPH.

WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
GONZALES...WAELDER...LITTLE NEW YORK...DILWORTH...NEWTONVILLE AND
NICKLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 2963 9714 2958 9721 2957 9720 2944 9737
      2959 9748 2976 9730 2964 9713
TIME...MOT...LOC 1026Z 229DEG 20KT 2954 9739

CP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 7:53 PM CDT	River Flood Warning	EWX	Karnes	18 hr
May 18, 4:17 AM CDT	Areal Flood Advisory	EWX	Fayette, Gonzales	3 hr
May 18, 4:48 AM CDT	Flash Flood Warning	EWX	Fayette, Gonzales	5 hr
May 18, 5:21 AM CDT	Areal Flood Advisory	EWX	Bastrop, Caldwell, Fayette, Lee	3 hr
May 18, 6:21 AM CDT	Areal Flood Advisory	EWX	Fayette, Lavaca	114 min
May 18, 6:58 AM CDT	Flash Flood Warning	EWX	Fayette, Lavaca	3 hr
May 18, 8:42 AM CDT	River Flood Warning	EWX	DeWitt	54 hr
May 18, 8:42 AM CDT	River Flood Warning	EWX	DeWitt	4 days
May 18, 9:41 AM CDT	Areal Flood Advisory	EWX	Fayette, Gonzales	109 min
May 18, 6:32 PM CDT	Special Weather Statement	EWX	Llano	43 min
May 18, 6:32 PM CDT	Severe Thunderstorm Warning	EWX	Llano	58 min

Nearby

Special Weather Statements in Texas, 2015 Every special weather statement in 2015

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.