Alert archive / Texas / Special Weather Statements in 2018

Special Weather Statement, NWS Austin/San Antonio, TX

September 3, 2018Atascosa County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Sep 3, 2018, 3:49 AM CDT for Atascosa County, Texas. It was in force for 41 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: Sep 3, 2018, 3:49 AM CDT (08:49 UTC)
Expired: Sep 3, 2018, 4:30 AM CDT
In force: 41 min
Issued by: NWS Austin/San Antonio, TX

County Atascosa County, TX

The radar

The Austin/San Antonio radar (KEWX), 111 km from the middle of the area, began a volume at 08:52 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, 8.8 hours before the alert went out and 212 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: 845 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1709 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 67 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 Sep 3, 12:57 AM CDT, 2 hours 52 minutes earlier.

Area forecast discussion, Sep 3, 12:57 AM CDT, 2 hours 52 minutes before

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Hazardous weather outlook, Sep 3, 3:37 AM CDT, 12 minutes before

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In the hours before

Special weather statement, Sep 3, 3:49 AM CDT, 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
Sep 2, 8:12 PM CDT	Special Weather Statement	EWX	Bandera	33 min
Sep 2, 8:15 PM CDT	Areal Flood Advisory	EWX	Bandera	2 hr
Sep 2, 8:41 PM CDT	Flash Flood Warning	EWX	Bandera	2 hr
Sep 2, 8:44 PM CDT	Areal Flood Advisory	EWX	Uvalde	2 hr
Sep 2, 8:51 PM CDT	Special Weather Statement	EWX	Uvalde	54 min
Sep 2, 9:43 PM CDT	Special Weather Statement	EWX	Frio	32 min
Sep 2, 10:11 PM CDT	Areal Flood Advisory	EWX	Frio, Medina	2 hr
Sep 2, 11:33 PM CDT	Areal Flood Advisory	EWX	Bandera, Kerr	117 min
Sep 3, 2:13 AM CDT	Areal Flood Advisory	EWX	Val Verde	3 hr
Sep 3, 5:02 AM CDT	Areal Flood Advisory	EWX	Medina, Uvalde	3 hr
Sep 3, 6:34 AM CDT	Flash Flood Warning	EWX	Medina, Uvalde	3 hr
Sep 3, 3:44 PM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
Sep 3, 5:58 PM CDT	Areal Flood Advisory	EWX	Hays	3 hr

Nearby

Special Weather Statements in Texas, 2018 Every special weather statement in 2018

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.