Alert archive / Texas / Areal Flood Advisories in 2021
Areal Flood Advisory 239, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this areal flood advisory at Aug 16, 2021, 7:59 PM CDT for Val Verde County, Texas. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 16, 2021, 7:59 PM CDT (00:59 UTC)
- Expired
- Aug 16, 2021, 11:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
County Val Verde County, TX
The radar
The Laughlin AFB radar (KDFX), 109 km from the middle of the area, began a volume at 01:00 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
Midland Regional, TX (KMAF), launched 00:00Z, 1.0 hours before the alert went out and 250 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.
- Mixed-layer CAPE
- 182 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 1685 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this areal flood advisory 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 areal flood advisory went out at Aug 16, 6:42 PM CDT, 1 hour 17 minutes earlier.
Area forecast discussion, Aug 16, 6:42 PM CDT, 1 hour 17 minutes before
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</html>Hazardous weather outlook, Aug 16, 3:13 AM CDT, 16 hours 46 minutes before
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</head>
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<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 2:28 PM CDT | Special Weather Statement | EWX | Val Verde | 47 min |
| Aug 17, 2:52 PM CDT | Special Weather Statement | EWX | Kinney | 38 min |
| Aug 17, 3:25 PM CDT | Areal Flood Advisory | EWX | Val Verde | 3 hr |
| Aug 17, 4:03 PM CDT | Areal Flood Advisory | EWX | Edwards, Real | 3 hr |
| Aug 17, 4:20 PM CDT | Flash Flood Warning | EWX | Val Verde | 4 hr |
Nearby
Areal Flood Advisories in Texas, 2021Every areal flood advisory in 2021
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.