Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Austin/San Antonio, TX

January 18, 2017Kendall County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Jan 18, 2017, 2:00 AM CST for Kendall County, Texas. It was in force for 30 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: Jan 18, 2017, 2:00 AM CST (08:00 UTC)
Expired: Jan 18, 2017, 2:30 AM CST
In force: 30 min
Issued by: NWS Austin/San Antonio, TX

County Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 87 km from the middle of the area, began a volume at 08:00 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

Corpus Christi, TX (KCRP), launched 00:00Z, 8.0 hours before the alert went out and 266 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: 1412 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 7.0

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 Jan 17, 3:29 PM CST, 10 hours 31 minutes earlier.

Area forecast discussion, Jan 17, 3:29 PM CST, 10 hours 31 minutes before

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</head>
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Jan 17, 4:35 AM CST, 21 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
435 AM CST TUE JAN 17 2017

TXZ171>173-183>194-202>209-217>225-228-181045-
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-
435 AM CST TUE JAN 17 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH-CENTRAL TEXAS..

.DAY ONE...TODAY AND TONIGHT.

THROUGH TONIGHT...THERE IS A MARGINAL RISK OF SEVERE STORMS OVER
PARTS OF THE COASTAL PRAIRIES, OR SOUTH OF A LINE FROM JOURDANTON
TO LA GRANGE. PRIMARY CONCERN FOR THE MARGINAL SEVERE THREAT WILL
BE FOR HAIL. THERE IS ALSO A POTENTIAL FOR WIDESPREAD RAINFALL
THROUGH TONIGHT...WITH SOME AREAS EAST OF US HIGHWAY 83 EXPECTED
TO RECEIVE HEAVY DOWNPOURS OF 1 TO 2 INCHES BETWEEN TODAY AND
EARLY WEDNESDAY MORNING. THESE RAINS WILL BE FALLING OVER ALREADY
RAIN SOAKED SOILS...LEADING TO MINOR FLOODING CONCERNS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

EARLY SUNDAY...A COLD FRONT IS EXPECTED TO BRING STRONG DAYTIME
WINDS THAT COULD GUST TO WELL OVER 40 MPH AT TIMES. A WIND
ADVISORY WILL LIKELY BE NEEDED. THE WINDY PATTERN WILL ALSO BE A
DRY ONE...AND THE RAPID DRYING OF FINER FUELS...SUCH AS CURED
GRASSES...WILL LEAD TO ELEVATED FIRE WEATHER CONDITIONS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO SUBMIT REPORTS OF ANY SEVERE WEATHER
AND HEAVY RAINFALL AMOUNTS THROUGH TONIGHT.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 8:17 PM CST	Special Weather Statement	EWX	Guadalupe	28 min
Jan 17, 8:47 PM CST	Special Weather Statement	EWX	Comal	28 min
Jan 17, 9:09 PM CST	Special Weather Statement	EWX	Hays	36 min
Jan 17, 10:35 PM CST	Areal Flood Advisory	EWX	Caldwell	3 hr
Jan 17, 11:22 PM CST	Areal Flood Advisory	EWX	Bastrop	3 hr
Jan 17, 11:27 PM CST	Areal Flood Advisory	EWX	DeWitt, Lavaca	3 hr
Jan 18, 12:24 AM CST	Special Weather Statement	EWX	Travis	36 min
Jan 18, 5:47 AM CST	Special Weather Statement	EWX	Kendall	28 min
Jan 18, 6:40 AM CST	Areal Flood Advisory	EWX	Hays, Travis	3 hr
Jan 18, 7:40 AM CST	Areal Flood Advisory	EWX	Travis	3 hr
Jan 18, 7:44 AM CST	Areal Flood Advisory	EWX	Hays	3 hr
Jan 18, 8:22 AM CST	Areal Flood Advisory	EWX	Williamson	3 hr
Jan 18, 8:45 AM CST	Areal Flood Advisory	EWX	Bastrop	3 hr

Nearby

Special Weather Statements in Texas, 2017 Every special weather statement 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.