Alert archive / Texas / Special Weather Statements in 2016

Special Weather Statement, NWS Austin/San Antonio, TX

April 21, 2016DeWitt County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Apr 21, 2016, 11:19 AM CDT for DeWitt County, Texas. It was in force for 26 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: Apr 21, 2016, 11:19 AM CDT (16:19 UTC)
Expired: Apr 21, 2016, 11:45 AM CDT
In force: 26 min
Issued by: NWS Austin/San Antonio, TX

County DeWitt County, TX

The radar

The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 16:23 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

Brownsville Intl, TX (KBRO), launched 12:00Z, 4.3 hours before the alert went out and 339 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: 1909 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 565 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

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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
Apr 21, 8:00 AM CDT	Special Weather Statement	EWX	Gillespie	45 min
Apr 21, 9:06 AM CDT	Special Weather Statement	EWX	Bexar	24 min
Apr 21, 9:25 AM CDT	Areal Flood Advisory	EWX	Bexar, Comal	2 hr

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.