Alert archive / Texas / Special Weather Statements in 2020

Special Weather Statement, NWS Austin/San Antonio, TX

April 27, 2020Atascosa County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Apr 27, 2020, 11:45 PM CDT for Atascosa 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: Apr 27, 2020, 11:45 PM CDT (04:45 UTC)
Expired: Apr 28, 2020, 12:15 AM CDT
In force: 30 min
Issued by: NWS Austin/San Antonio, TX

County Atascosa County, TX

The radar

The Austin/San Antonio radar (KEWX), 130 km from the middle of the area, began a volume at 04:46 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 (KDRT), launched 00:00Z, 4.8 hours before the alert went out and 207 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: 2136 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1925 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 48 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 Apr 27, 10:37 PM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, Apr 27, 10:37 PM CDT, 1 hour 8 minutes before

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Hazardous weather outlook, Apr 27, 3:50 AM CDT, 19 hours 55 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
350 AM CDT Mon Apr 27 2020

TXZ171>173-183>194-202>209-217>225-228-281000-
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-
350 AM CDT Mon Apr 27 2020

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...Today And Tonight.

One or two strong to severe thunderstorms are possible across Val
Verde county this evening. Damaging winds and hail are the main
threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

A few strong to severe thunderstorms are possible along and
northeast of a Kerrville to San Antonio to Cuero line Tuesday
night into Wednesday morning. Large hail and damaging winds are
the main threats.

Otherwise, no hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Local storm report, Apr 27, 9:37 PM CDT, 2 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
937 PM CDT MON APR 27 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0841 PM     TSTM WND DMG     3 NNW DEL RIO           29.40N 100.91W
04/27/2020                   VAL VERDE          TX   PUBLIC

            PICTURES OF A FEW TREES DOWN...A LARGE
            SECTION OF BACKYARD FENCE MISSING...AND AN
            OUTDOOR SHED BLOW OVER SHARED VIA SOCIAL
            MEDIA. REPORTS OF POWER OUTAGES AROUND DEL
            RIO. TIME ESTIMATED VIA RADAR.

&&

AAT

Special weather statement, Apr 27, 10:08 PM CDT, 1 hour 37 minutes before

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Special weather statement, Apr 27, 10:27 PM CDT, 1 hour 18 minutes before

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Special weather statement, Apr 27, 11:06 PM CDT, 39 minutes before

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Special weather statement, Apr 27, 11:08 PM CDT, 37 minutes before

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Special weather statement, Apr 27, 11:45 PM 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
Apr 27, 7:38 PM CDT	Special Weather Statement	EWX	Val Verde	52 min
Apr 27, 8:26 PM CDT	Special Weather Statement	EWX	Kinney	49 min
Apr 27, 8:36 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	54 min
Apr 27, 8:52 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Maverick, Val Verde	68 min
Apr 27, 9:43 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde	62 min
Apr 27, 10:08 PM CDT	Special Weather Statement	EWX	Zavala	37 min
Apr 27, 10:27 PM CDT	Special Weather Statement	EWX	Medina, Zavala	48 min
Apr 27, 11:06 PM CDT	Special Weather Statement	EWX	Frio	39 min
Apr 27, 11:08 PM CDT	Special Weather Statement	EWX	Dimmit	52 min

Nearby

Special Weather Statements in Texas, 2020 Every special weather statement in 2020

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.