Alert archive / Texas / Special Weather Statements in 2017

Special Weather Statement, NWS Austin/San Antonio, TX

January 2, 20174 counties in Texas

NWS Austin/San Antonio, TX issued this special weather statement at Jan 2, 2017, 3:09 AM CST for 4 counties in Texas. It was in force for 36 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 2, 2017, 3:09 AM CST (09:09 UTC)
Expired: Jan 2, 2017, 3:45 AM CST
In force: 36 min
Issued by: NWS Austin/San Antonio, TX

Counties Gillespie County, TX, Kerr County, TX, Llano County, TX, Real County, TX

The radar

The Austin/San Antonio radar (KEWX), 130 km from the middle of the area, began a volume at 09:09 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

Del Rio, TX (KDLF), launched 00:00Z, 9.2 hours before the alert went out and 217 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: 26 J/kg
Mixed-layer CIN: -450 J/kg
Mixed-layer LCL: 2272 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 2, 2:20 AM CST, 49 minutes earlier.

Area forecast discussion, Jan 2, 2:20 AM CST, 49 minutes before

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Hazardous weather outlook, Jan 1, 5:06 AM CST, 22 hours 3 minutes before

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In the hours before

Special weather statement, Jan 2, 12:19 AM CST, 2 hours 50 minutes before

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Special weather statement, Jan 2, 1:31 AM CST, 1 hour 38 minutes before

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Special weather statement, Jan 2, 3:09 AM CST, 0 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
Jan 2, 12:19 AM CST	Special Weather Statement	EWX	Val Verde	26 min
Jan 2, 1:31 AM CST	Special Weather Statement	EWX	Edwards	44 min
Jan 2, 3:53 AM CST	Special Weather Statement	EWX	Blanco, Burnet, Gillespie, Llano	37 min
Jan 2, 4:15 AM CST	Special Weather Statement	EWX	Travis, Williamson	45 min
Jan 2, 5:00 AM CST	Special Weather Statement	EWX	Bastrop	30 min
Jan 2, 5:14 AM CST	Special Weather Statement	EWX	Comal	31 min
Jan 2, 5:26 AM CST	Special Weather Statement	EWX	Lee	34 min
Jan 2, 5:36 AM CST	Severe Thunderstorm Warning	EWX	Bastrop, Lee	39 min

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.