Alert archive / Texas / Areal Flood Advisories in 2021
Areal Flood Advisory 209, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this areal flood advisory at Aug 2, 2021, 3:45 AM CDT for Comal County, Guadalupe County, Hays County, Texas. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Aug 2, 2021, 3:45 AM CDT (08:45 UTC)
- Expired
- Aug 2, 2021, 8:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties Comal County, TX, Guadalupe County, TX, Hays County, TX
The radar
The Austin/San Antonio radar (KEWX), 14 km from the middle of the area, began a volume at 08:48 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, 8.8 hours before the alert went out and 271 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
- 619 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 1602 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 2, 3:33 AM CDT, 12 minutes earlier.
Area forecast discussion, Aug 2, 3:33 AM CDT, 12 minutes before
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</html>Hazardous weather outlook, Aug 1, 8:24 PM CDT, 7 hours 21 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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<p id="message2">
Please try again in a few minutes.
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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 1, 7:53 PM CDT | Areal Flood Advisory | EWX | Bandera, Real | 3 hr |
| Aug 1, 11:02 PM CDT | Areal Flood Advisory | EWX | Kendall | 3 hr |
| Aug 2, 12:27 AM CDT | Areal Flood Advisory | EWX | Bastrop, Hays, Travis | 3 hr |
| Aug 2, 3:53 AM CDT | Areal Flood Advisory | EWX | Edwards, Kinney | 4 hr |
| Aug 2, 4:09 AM CDT | Flash Flood Warning | EWX | Comal, Guadalupe | 4 hr |
| Aug 2, 4:13 AM CDT | Areal Flood Advisory | EWX | Uvalde | 4 hr |
| Aug 2, 5:41 AM CDT | Flash Flood Warning | EWX | Guadalupe | 4 hr |
| Aug 2, 5:45 AM CDT | Areal Flood Advisory | EWX | Bexar, Guadalupe, Wilson | 3 hr |
| Aug 2, 5:51 AM CDT | Areal Flood Advisory | EWX | Bandera, Real | 3 hr |
| Aug 2, 5:57 AM CDT | Areal Flood Advisory | EWX | Comal, Hays | 4 hr |
| Aug 2, 6:37 AM CDT | Areal Flood Advisory | EWX | Bandera, Kerr, Medina | 4 hr |
| Aug 2, 6:37 AM CDT | Flash Flood Warning | EWX | Comal | 5 hr |
| Aug 2, 6:52 AM CDT | Flash Flood Warning | EWX | Hays | 3 hr |
| Aug 2, 7:15 AM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Comal, Kendall, Kerr, Medina | 5 hr |
| Aug 2, 7:29 AM CDT | Special Weather Statement | EWX | Bexar | 46 min |
| Aug 2, 7:47 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Kendall | 4 hr |
| Aug 2, 8:13 AM CDT | Areal Flood Advisory | EWX | Kinney | 3 hr |
| Aug 2, 8:15 AM CDT | Areal Flood Advisory | EWX | Bastrop, Lee, Travis, Williamson | 5 hr |
| Aug 2, 8:18 AM CDT | Special Weather Statement | EWX | Bexar, Comal | 42 min |
| Aug 2, 8:26 AM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Kendall | 4 hr |
| Aug 2, 8:36 AM CDT | Areal Flood Advisory | EWX | Bexar | 4 hr |
| Aug 2, 9:16 AM CDT | Areal Flood Advisory | EWX | Blanco, Hays, Travis | 3 hr |
| Aug 2, 10:25 AM CDT | Areal Flood Advisory | EWX | Kinney, Maverick, Uvalde, Zavala | 3 hr |
| Aug 2, 2:45 PM CDT | Areal Flood Advisory | EWX | Bandera, Edwards, Kerr, Real, Val Verde | 3 hr |
| Aug 2, 4:56 PM CDT | Areal Flood Advisory | EWX | Travis, Williamson | 3 hr |
| Aug 2, 5:12 PM CDT | Areal Flood Advisory | EWX | Blanco, Hays | 3 hr |
| Aug 2, 6:19 PM CDT | Areal Flood Advisory | EWX | Caldwell, Hays, Travis | 2 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.